diff options
| author | Josh Triplett <josh@freedesktop.org> | 2006-02-18 16:49:41 -0800 |
|---|---|---|
| committer | Josh Triplett <josh@josh-mobile.localdomain> | 2006-02-18 16:49:41 -0800 |
| commit | 47ceed78612d48dcda62cc2686fc527d61abe38b (patch) | |
| tree | 06f7f11c92006537925c09440c6b6f9178d2dd4c | |
| download | xcb-libxcb-47ceed78612d48dcda62cc2686fc527d61abe38b.tar.gz | |
Remove xcl and CVSROOT.
41 files changed, 8995 insertions, 0 deletions
diff --git a/.cvsignore b/.cvsignore new file mode 100644 index 0000000..3d5e104 --- /dev/null +++ b/.cvsignore @@ -0,0 +1,17 @@ +Makefile +Makefile.in +aclocal.m4 +autom4te.cache +compile +config.guess +config.log +config.status +config.sub +configure +depcomp +install-sh +libtool +ltmain.sh +missing +mkinstalldirs +*.pc @@ -0,0 +1,30 @@ +Copyright (C) 2001-2004 Bart Massey, Jamey Sharp, and Josh Triplett. +All Rights Reserved. + +Permission is hereby granted, free of charge, to any person +obtaining a copy of this software and associated +documentation files (the "Software"), to deal in the +Software without restriction, including without limitation +the rights to use, copy, modify, merge, publish, distribute, +sublicense, and/or sell copies of the Software, and to +permit persons to whom the Software is furnished to do so, +subject to the following conditions: + +The above copyright notice and this permission notice shall +be included in all copies or substantial portions of the +Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY +KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE +WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR +PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS +BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER +IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR +OTHER DEALINGS IN THE SOFTWARE. + +Except as contained in this notice, the names of the authors +or their institutions shall not be used in advertising or +otherwise to promote the sale, use or other dealings in this +Software without prior written authorization from the +authors. diff --git a/ChangeLog b/ChangeLog new file mode 100644 index 0000000..7ba7263 --- /dev/null +++ b/ChangeLog @@ -0,0 +1,610 @@ +2005-12-28 Jamey Sharp <jamey@minilop.net> + + * configure.ac: + Replace obsolete AC_OUTPUT(...) call with AC_CONFIG_FILES(...) + and the no-argument AC_OUTPUT macro. + +2005-12-24 Jamey Sharp <jamey@minilop.net> + + * src/xcb_xlib.c, src/xcbxlib.h, src/Makefile.am: + New header and two functions specifically for Xlib's use, so + we can quit installing xcbint.h. + + * src/xcb_out.c, src/xcbint.h: + Now that Xlib uses entirely public API, force_sequence_wrap is + purely internal to xcb_out. + +2005-12-20 Jamey Sharp <jamey@minilop.net> + + * src/xcb_util.c: + Use AF_UNIX instead of PF_UNIX, because they're interchangeable + on Linux (and 4.x BSD?) but on MacOS X the latter is not + available. Thanks to Ian Osgood for testing. + +2005-12-12 Jamey Sharp <jamey@minilop.net> + + * src/xcb_util.c: + Rewrite XCBParseDisplay to handle all error cases correctly. + Thanks to Travis Spencer for pointing out a problem with + the previous sscanf call; turns out that sscanf won't do what + I want anyway, so this version just uses strtoul. + +2005-12-12 Jamey Sharp <jamey@minilop.net> + + * tests/check_public.c: + Fix segfault in fail_unless calls and provide more useful error + messages. Also remove DISPLAY from the environment and test + ParseDisplay on a null pointer. + +2005-12-07 Jamey Sharp <jamey@minilop.net> + + * src/xcb.h, src/xcb_in.c: + Use GCC attribute extension, if available, to mark some + functions deprecated; and rename XCBWaitEvent to + XCBWaitForEvent, with a deprecated backwards compatibility + function. + +2005-12-07 Jamey Sharp <jamey@minilop.net> + + * src/xcb.h, src/xcb_conn.c, src/xcb_util.c: + Rename XCBConnect to XCBConnectToFD, and implement XCBConnect + and XCBConnectToDisplayWithAuthInfo, as specified by the XcbApi + documentation. Provide a trivial implementation of deprecated + XCBConnectBasic for backwards compatibility. Fix XCBParseDisplay + to accept a null screen pointer. + +2005-09-30 Trevor Woerner <twoerner.x@gmail.com> + + reviewer: Jamey Sharp <jamey@minilop.net> + + * Makefile.am, configure.ac, src/Makefile.am, tests/Makefile.am, + src/check_all.c, src/check_public.c, src/check_suites.h: + Created a new directory called "tests" where the unit tests + will reside, separate from other files. Moved the unit + test files from the "src" directory into the new "tests" + directory. + + * configure.ac, tests/CheckLog.xsl, tests/.cvsignore, + tests/Makefile.am, tests/check_all.c: + Added an XSLT transform to post-process the XML log file which + is generated by the unit test suite into an HTML page. Added + the necessary hooks into the build system to have this + translation occur when necessary as part of the build process. + +2005-08-15 Trevor Woerner <twoerner.x@gmail.com> + + reviewer: Jamey Sharp <jamey@minilop.net> + + * src/Makefile.am: + Make builds work when the source and build directories + are different. + +2005-08-03 Trevor Woerner <twoerner.x@gmail.com> + + reviewer: Jamey Sharp <jamey@minilop.net> + + * configure.ac: + Allow people to not have check as long as they have at + least automake version 1.9. Older versions of automake + still work as long as check is installed or the NoCheck + instructions are followed. + +2005-07-21 Jamey Sharp <jamey@minilop.net> + + * src/xcb_conn.c: + Fix one uninitialized memory warning from Valgrind. + More will have to wait. + +2005-07-21 Jamey Sharp <jamey@minilop.net> + + * src/xcb_ext.c: + Fix memory leak reported by Carl Worth (thanks Carl!). + +2005-05-22 Josh Triplett <josh@freedesktop.org> + + * src/c-client.xsl: + Permit unions to have fixed-length list fields. + +2005-05-21 Josh Triplett <josh@freedesktop.org> + + * src/c-client.xsl: + In function parameters and structure fields, line up field names in + the same starting column. + +2005-05-17 Josh Triplett <josh@freedesktop.org> + + * src/c-client.xsl: + Make header files self-sufficient, by including xcb.h in the + generated headers rather than the generated sources. + + * src/xcbext.h: + Make xcbext.h self-sufficient, by including xcb.h. + +2005-05-17 Josh Triplett <josh@freedesktop.org> + + * src/c-client.xsl: + Line up function parameters with opening parenthesis. + +2005-05-17 Jamey Sharp <jamey@minilop.net> + + * src/c-client.xsl: + Improve whitespace output on function declarations. + +2005-04-23 Jeremy Kolb <jkolb@brandeis.edu> + * src/c-client.xsl: + Added list support for typedefs. + GLX now compiles. + +2005-04-23 Josh Triplett <josh@freedesktop.org> + + * src/c-client.xsl: + Allow protocol descriptions to explicitly qualify types with a + namespace, which should be the value of the header attribute from + the protocol description containing the desired type. + +2005-04-10 Jamey Sharp <jamey@minilop.net> + + * src/xcb.h, src/xcb_in.c: + New public function XCBGetRequestRead: returns the last sequence + number that the server is known to have processed. This function + enables apps to determine whether forcing a cookie is going to + block. + +2005-04-09 Jamey Sharp <jamey@minilop.net> + + * src/xcb_ext.c: + Implement XCBPrefetchExtensionData. An extension can now be in + one of three states in a particular connection's cache: not + queried; query cookie available; and query reply available. + +2005-04-09 Jamey Sharp <jamey@minilop.net> + + * src/xcb_ext.c, src/xcbint.h: + Assign a display-independent unique integer to each XCBExtension + structure. Use a map instead of a list for the extension cache. + Key the map on the assigned integer. + +2005-04-06 Jeremy Kolb <jkolb@brandeis.edu> + + * src/c-client.xsl: + Added support for c types float and double. + Needed for GLX extension. + +2005-04-02 Jamey Sharp <jamey@minilop.net> + + * src/c-client.xsl: + Workaround for XSLT processors that can't understand attribute + values of the form '{{ "{...}" }}'. (What? That looks completely + clear to me. *grin*) + +2005-04-01 Jamey Sharp <jamey@minilop.net> + + * src/xcb_list.c: + Make the _destroy operations no-op on null pointers. + +2005-03-31 Jamey Sharp <jamey@minilop.net> + + * src/xcb.h, src/xcb_conn.c, src/xcb_out.c, src/xcbint.h: + Lazily check for BIG-REQUESTS support. The first call to + XCBGetMaximumRequestLength takes the two-round-trip penalty for + discovering BIG-REQUESTS support, and caches the result for + subsequent calls. Also XCBSendRequest is now careful to only ask + for the true maximum request length if the length from the + connection setup data isn't sufficient for the current request. + +2005-03-31 Jamey Sharp <jamey@minilop.net> + + * src/xcb_in.c: + Fix X error handling to, uh, not hang. + +2005-03-30 Jamey Sharp <jamey@minilop.net> + + * src/xcb_in.c, src/xcbint.h: + Accept zero or more replies to any request. Eliminates, for the + moment, nearly all run-time error checking regarding the number + of replies expected for a particular request. Also breaks the + unexpected reply callback, which is OK because I was going to + remove it anyway, and now I've done so. + +2005-03-30 Jamey Sharp <jamey@minilop.net> + + * src/xcb_list.c, src/xcbint.h: + Add a map ADT implemented using the list ADT. + +2005-03-28 Vincent Torri <torri@iecn.u-nancy.fr> + + * doc/tutorial/index.html, doc/tutorial/xcb.css: + Add a tutorial + +2005-03-27 Jeremy Kolb <jkolb@brandeis.edu> + + * src/Makefile.am: + Added xf86dri (xcb-proto/src/extensions/xf86dri.h). + Removed compilation of record as it's broken. + +2005-03-25 Jamey Sharp <jamey@minilop.net> + + * src/xcb_in.c: + Instead of storing a pending flag per reply record, look in the + readers list to find out whether there's a reader waiting for + the reply we've just been asked to wait for. + +2005-03-25 Jamey Sharp <jamey@minilop.net> + + * src/xcb_list.c, src/xcbint.h: + Add _xcb_queue_is_empty. + +2005-03-25 Jamey Sharp <jamey@minilop.net> + + * src/xcb_in.c, src/xcb_list.c, src/xcbint.h: + Add a queue ADT. Currently implemented using the list ADT, but + analysis will probably suggest a better data structure. The + split is intended to help that analysis. + +2005-03-25 Jamey Sharp <jamey@minilop.net> + + * src/xcb_in.c, src/xcb_list.c, src/xcbint.h: + Remove _xcb_list_length. (Two callers in xcb_in didn't actually + care about the returned value beyond "empty" or "non-empty", + which they can get other ways.) _xcb_in_events_length became + obsolete in the process, and I took _xcb_list_clear out of + xcbint.h while I was at it because only _xcb_list_delete calls + it these days. + +2005-03-25 Jamey Sharp <jamey@minilop.net> + + * src/xcb.h, src/xcb_in.c: + Remove XCBEventQueueLength and XCBEventQueueClear: they're not + part of the new API, and they interfere with analysis of the + _xcb_list implementation. + +2005-03-24 Josh Triplett <josh@freedesktop.org> + + * configure.ac: + Change pdx.freedesktop.org to lists.freedesktop.org in package + email address. + +2005-03-23 Jamey Sharp <jamey@minilop.net> + + * src/xcb_conn.c, src/xcb_in.c: + avn@daemon.hole.ru pointed out two memory leaks in XCB, which + this update fixes. I also introduced a third a couple of days + ago, which this fixes as well. + +2005-03-23 Jamey Sharp <jamey@minilop.net> + + * src/xcb_in.c: + Quit storing an "error" flag: it's redundant with the contents + of the packet that it was stored with. + +2005-03-22 Jamey Sharp <jamey@minilop.net> + + * src/xcb_in.c, src/xcbint.h: + My recent Xlib patch stressed XCB's pending reply queue in ways + it has never been stressed before, with thousands of entries. + Profiling revealed that wake_up_next_reader was taking most of + the cycles of my test app with its linear search of the reply + queue. So I gave it its own 'readers' queue, which can have at + most one entry per thread, and which can be no more than the + number of pending replies. In the current implementation the + readers queue uses only constant-time operations, too. + +2005-03-20 Jamey Sharp <jamey@minilop.net> + + * src/xcb_in.c: + Wait for the last known read sequence number to pass the request + we're waiting for, instead of checking whether data has arrived + for the current request. Causes null to be returned if somebody + screwed up by expecting a reply when none can come; relied on by + new Xlib/XCB bits that intentionally and routinely screw up this + way because the API doesn't give them enough information. + + * src/xcb_list.c, src/xcbint.h: + Add _xcb_list_peek_head so Xlib doesn't have to repeatedly + remove and re-insert the item at the head of its new + pending_requests queue. Profiling showed that was a significant + performance hit for the above-mentioned patch and with this + three-line function apps are actually usable again. + +2004-11-26 Josh Triplett <josh@freedesktop.org> + + * src/c-client.xsl: + In do-request processing, use the existing num-parts variable + rather than recalculating the same expression. + +2004-11-26 Josh Triplett <josh@freedesktop.org> + + * src/c-client.xsl: + * Add a list of known core types, and don't search all the + protocol descriptions for types in that list. This + significantly shortens the processing time. + * Search for all definitions of a non-core type, not just the + first, in order to check for duplicate definitions. + * Add an error message for non-core types with no definitions + found. + +2004-11-10 Josh Triplett <josh@freedesktop.org> + + * src/c-client.xsl: + Don't create a separate local variable for exprfields, and change + an explicit xsl:for-each to an xsl:apply-templates. + +2004-11-10 Josh Triplett <josh@freedesktop.org> + + * src/c-client.xsl: + Prefix variables in request functions with "xcb_" to avoid + collisions with field names. + +2004-11-09 Josh Triplett <josh@freedesktop.org> + + * src/c-client.xsl: + * src/xcb_out.c: + * src/xcbext.h: + More API changes: Put constant request-specific data into a static + const structure in each request function. + +2004-11-09 Josh Triplett <josh@freedesktop.org> + + * src/c-client.xsl: + Add support for an <indent> tag in a function body, which indents + the <l>s it contains. + + * debian/.cvsignore: + debian/copyright is a generated file, so add it to + debian/.cvsignore + +2004-11-08 Jamey Sharp <jamey@minilop.net> + + * src/xcb_conn.c: + Make the __thread-based assertion a compile-time + option, defaulting to off. It breaks on many systems + and isn't critical to XCB's functionality. + +2004-11-07 Josh Triplett <josh@freedesktop.org> + + * c-client.xsl: + Update XSLT to deal with change from extension element to + extension-name and extension-xname attributes on xcb element. + +2004-11-06 Josh Triplett <josh@freedesktop.org> + + * xcb.h: + * xcb_auth.c: + * xcb_conn.c: + * xcb_ext.c: + * xcb_in.c: + * xcb_list.c: + * xcb_out.c: + * xcb_util.c: + * xcb_xid.c: + * xcbext.h: + * xcbint.h: + Include license in every file rather than referencing COPYING. + Update copyright notices to 2004. + + * COPYING: + Remove non-applicable licenses from COPYING file. + +2004-11-06 Josh Triplett <josh@freedesktop.org> + + * configure.ac: + * src/.cvsignore: + * src/Makefile.am: + * src/xcb.h: + Merged changes for XML-XCB project. + + * src/c-client.xsl: + * src/xcb.h: + Add XSLT binding generator and non-M4 version of xcb.h. + + * src/client-c.xcb: + * src/xcb.h.m4: + Remove M4 binding generator and M4 version of xcb.h. + + * debian/changelog: + * debian/control: + * debian/copyright.debian: + * debian/rules: + Updated Debian packaging. + +2004-09-30 Jamey Sharp <jamey@minilop.net> + + * src/xcbext.h: + * src/xcb_in.c: + * src/client-c.xcb: + Renamed XCBWaitReply to XCBWaitForReply for new API. + +2004-09-30 Jamey Sharp <jamey@minilop.net> + + * src/Makefile.am: + Fix build failure when compiling tests. + +2004-09-29 Jamey Sharp <jamey@minilop.net> + + * src/xcb.h.m4: + * src/xcb_in.c: + Added XCBPollForEvent function from new API. + +2004-09-29 Jamey Sharp <jamey@minilop.net> + + * src/xcb.h.m4: + * src/xcbext.h: + * src/client-c.xcb: + * src/xcb_ext.c: + Update the extension cache for its new API. The + optimizations that this API enables are not yet + implemented, but the current implementation should + at least function correctly. + +2004-09-29 Jamey Sharp <jamey@minilop.net> + + * src/xcb_util.c: + * src/xcbext.h: + Oops, XCBPopcount was supposed to change argument + types too. + +2004-09-29 Jamey Sharp <jamey@minilop.net> + + * src/client-c.xcb: + * src/xcb_util.c: + * src/xcbext.h: + Renamed XCBOnes to XCBPopcount as per new API spec. + +2004-09-29 Jamey Sharp <jamey@minilop.net> + + * src/xcbext.h: + * src/xcb.h.m4: + * src/Makefile.am: + * src/client-c.xcb: + * src/xcb_in.c: + * src/xcb_out.c: + * src/xcb_util.c: + * src/xcb_xid.c: + Moved declarations that are only useful to protocol + implementations into a separate header file, + xcbext.h. + +2004-09-28 Jamey Sharp <jamey@minilop.net> + + * src/xcbint.h: + * src/xcb_conn.c: + Add internal sanity check macros for sequence + numbers, and invoke them every time _xcb_conn_wait + is entered. + +2004-09-28 Jamey Sharp <jamey@minilop.net> + + * src/client-c.xcb: + Allow LISTPARAMs to omit the length argument. When + generating C code, a LOCALPARAM is automatically + generated for the length if the length argument is + omitted. + +2004-08-13 Jamey Sharp <jamey@minilop.net> + + * configure.ac: + * src/Makefile.am: + * src/.cvsignore: + * src/check_all.c: + * src/check_suites.h: + * src/check_public.c: + Add the first unit tests for XCB. This adds a build + dependency on 'check'; I hope somebody will make it + more of a build recommendation. + +2004-08-13 Jamey Sharp <jamey@minilop.net> + + * src/xcb_conn.c: + Add a sanity check: assert() that _xcb_conn_wait + will not be re-entered within the same thread. This + turns out not to be true in some current buggy code. + Xlib re-enters from _XAsyncReplyHandler in + src/xcl/display.c; and the X Test Suite seems to + catch SIGABRT and continue running. + +2004-08-10 Jamey Sharp <jamey@minilop.net> + + * src/xcb_out.c: + I misread the BIG-REQUESTS specification. The long + length field needs to count itself too. + +2004-07-24 Jamey Sharp <jamey@minilop.net> + + * src/client-c.xcb: + Renamed functions that return new iterators to + *Iter, to avoid conflict with similar functions that + return arrays. + + Deprecating ARRAYFIELD in favor of LISTFIELD, which + now generates both array and iterator accessors. You + get an array accessor as long as the element type is + fixed length; you get an interator accessor as long + as the base type has an iterator. You always get a + 'Length' function. + +2004-07-24 Jamey Sharp <jamey@minilop.net> + + * src/xcb_auth.c: + Bart cleaned up some code that I made ugly, and + I'm fixing a warning that resulted from a static + function being created but not necessarily used. + +2004-07-07 Jamey Sharp <jamey@minilop.net> + + * src/xcb_xid.c: + OK, it might be a good idea to commit something + that compiles. I thought I'd tested this change... + +2004-07-06 Jamey Sharp <jamey@minilop.net> + + * src/xcbint.h: + * src/xcb_xid.c: + Added support for the XC-Misc extension's ability + to request more XIDs from the server when the + client runs out of them. + +2004-07-06 Jamey Sharp <jamey@minilop.net> + + * src/xcb.h.m4: + * src/xcb_auth.c: + * src/xcb_util.c: + Removed XCBNextNonce, and the nonce parameter of + XCBGetAuthInfo, from the API. XCB can compute + that just fine without help from the application. + +2004-07-06 Jamey Sharp <jamey@minilop.net> + + * src/Makefile.am: + Importing part of patches, adding SYNC, by + Mikko Markus Torni <mikko.markus.torni@iki.fi>. + This needed better padding computation in XCB + before it could be implemented cleanly. + +2004-07-02 Jamey Sharp <jamey@minilop.net> + + * src/Makefile.am: + Importing part of patches, adding XC-MISC, by + Mikko Markus Torni <mikko.markus.torni@iki.fi>. + +2004-07-02 Jamey Sharp <jamey@minilop.net> + + * src/xcb.h.m4: + * src/xcb_in.c: + Remove XCBEventQueueRemove and XCBEventQueueFind. + Their existence in the API constrains the + implementation, and they're not useful for real + code, like toolkits, anyway. + +2004-07-02 Jamey Sharp <jamey@minilop.net> + + * src/client-c.xcb: + * src/xcb.h.m4: + XCB headers are now compatible with C++ source. + +2004-07-02 Jamey Sharp <jamey@minilop.net> + + * src/client-c.xcb: + * src/xcb.h.m4: + Keith's fix for padding didn't quite work, despite + looking quite sensible at the time. Replaced + XCB_TYPE_CEIL with XCB_TYPE_PAD and made all the + iterators, lists, and arrays count the number of + bytes from the beginning of the current request. + +2004-07-02 Jamey Sharp <jamey@minilop.net> + + * src/xcb_out.c: + * src/xcbint.h: + Force a response from the server if we haven't seen + one in 65530 requests. If you don't do this, XCB + gets confused the next time it waits for a reply. + +2004-06-16 Keith Packard <keithp@keithp.com> + + * src/client-c.xcb: + * src/xcb.h.m4: + Must round datatype lengths to 4-byte boundary for + NEXTFIELD and End macros. Created new XCB_TYPE_CEIL + macro for this purpose and used it in a couple of + places. It is to be hoped that this represents all + of the locations that need changing... @@ -0,0 +1,229 @@ +Copyright (C) 1994, 1995, 1996, 1999, 2000, 2001, 2002 Free Software +Foundation, Inc. + + This file is free documentation; the Free Software Foundation gives +unlimited permission to copy, distribute and modify it. + +Basic Installation +================== + + These are generic installation instructions. + + The `configure' shell script attempts to guess correct values for +various system-dependent variables used during compilation. It uses +those values to create a `Makefile' in each directory of the package. +It may also create one or more `.h' files containing system-dependent +definitions. Finally, it creates a shell script `config.status' that +you can run in the future to recreate the current configuration, and a +file `config.log' containing compiler output (useful mainly for +debugging `configure'). + + It can also use an optional file (typically called `config.cache' +and enabled with `--cache-file=config.cache' or simply `-C') that saves +the results of its tests to speed up reconfiguring. (Caching is +disabled by default to prevent problems with accidental use of stale +cache files.) + + If you need to do unusual things to compile the package, please try +to figure out how `configure' could check whether to do them, and mail +diffs or instructions to the address given in the `README' so they can +be considered for the next release. If you are using the cache, and at +some point `config.cache' contains results you don't want to keep, you +may remove or edit it. + + The file `configure.ac' (or `configure.in') is used to create +`configure' by a program called `autoconf'. You only need +`configure.ac' if you want to change it or regenerate `configure' using +a newer version of `autoconf'. + +The simplest way to compile this package is: + + 1. `cd' to the directory containing the package's source code and type + `./configure' to configure the package for your system. If you're + using `csh' on an old version of System V, you might need to type + `sh ./configure' instead to prevent `csh' from trying to execute + `configure' itself. + + Running `configure' takes awhile. While running, it prints some + messages telling which features it is checking for. + + 2. Type `make' to compile the package. + + 3. Optionally, type `make check' to run any self-tests that come with + the package. + + 4. Type `make install' to install the programs and any data files and + documentation. + + 5. You can remove the program binaries and object files from the + source code directory by typing `make clean'. To also remove the + files that `configure' created (so you can compile the package for + a different kind of computer), type `make distclean'. There is + also a `make maintainer-clean' target, but that is intended mainly + for the package's developers. If you use it, you may have to get + all sorts of other programs in order to regenerate files that came + with the distribution. + +Compilers and Options +===================== + + Some systems require unusual options for compilation or linking that +the `configure' script does not know about. Run `./configure --help' +for details on some of the pertinent environment variables. + + You can give `configure' initial values for configuration parameters +by setting variables in the command line or in the environment. Here +is an example: + + ./configure CC=c89 CFLAGS=-O2 LIBS=-lposix + + *Note Defining Variables::, for more details. + +Compiling For Multiple Architectures +==================================== + + You can compile the package for more than one kind of computer at the +same time, by placing the object files for each architecture in their +own directory. To do this, you must use a version of `make' that +supports the `VPATH' variable, such as GNU `make'. `cd' to the +directory where you want the object files and executables to go and run +the `configure' script. `configure' automatically checks for the +source code in the directory that `configure' is in and in `..'. + + If you have to use a `make' that does not support the `VPATH' +variable, you have to compile the package for one architecture at a +time in the source code directory. After you have installed the +package for one architecture, use `make distclean' before reconfiguring +for another architecture. + +Installation Names +================== + + By default, `make install' will install the package's files in +`/usr/local/bin', `/usr/local/man', etc. You can specify an +installation prefix other than `/usr/local' by giving `configure' the +option `--prefix=PATH'. + + You can specify separate installation prefixes for +architecture-specific files and architecture-independent files. If you +give `configure' the option `--exec-prefix=PATH', the package will use +PATH as the prefix for installing programs and libraries. +Documentation and other data files will still use the regular prefix. + + In addition, if you use an unusual directory layout you can give +options like `--bindir=PATH' to specify different values for particular +kinds of files. Run `configure --help' for a list of the directories +you can set and what kinds of files go in them. + + If the package supports it, you can cause programs to be installed +with an extra prefix or suffix on their names by giving `configure' the +option `--program-prefix=PREFIX' or `--program-suffix=SUFFIX'. + +Optional Features +================= + + Some packages pay attention to `--enable-FEATURE' options to +`configure', where FEATURE indicates an optional part of the package. +They may also pay attention to `--with-PACKAGE' options, where PACKAGE +is something like `gnu-as' or `x' (for the X Window System). The +`README' should mention any `--enable-' and `--with-' options that the +package recognizes. + + For packages that use the X Window System, `configure' can usually +find the X include and library files automatically, but if it doesn't, +you can use the `configure' options `--x-includes=DIR' and +`--x-libraries=DIR' to specify their locations. + +Specifying the System Type +========================== + + There may be some features `configure' cannot figure out +automatically, but needs to determine by the type of machine the package +will run on. Usually, assuming the package is built to be run on the +_same_ architectures, `configure' can figure that out, but if it prints +a message saying it cannot guess the machine type, give it the +`--build=TYPE' option. TYPE can either be a short name for the system +type, such as `sun4', or a canonical name which has the form: + + CPU-COMPANY-SYSTEM + +where SYSTEM can have one of these forms: + + OS KERNEL-OS + + See the file `config.sub' for the possible values of each field. If +`config.sub' isn't included in this package, then this package doesn't +need to know the machine type. + + If you are _building_ compiler tools for cross-compiling, you should +use the `--target=TYPE' option to select the type of system they will +produce code for. + + If you want to _use_ a cross compiler, that generates code for a +platform different from the build platform, you should specify the +"host" platform (i.e., that on which the generated programs will +eventually be run) with `--host=TYPE'. + +Sharing Defaults +================ + + If you want to set default values for `configure' scripts to share, +you can create a site shell script called `config.site' that gives +default values for variables like `CC', `cache_file', and `prefix'. +`configure' looks for `PREFIX/share/config.site' if it exists, then +`PREFIX/etc/config.site' if it exists. Or, you can set the +`CONFIG_SITE' environment variable to the location of the site script. +A warning: not all `configure' scripts look for a site script. + +Defining Variables +================== + + Variables not defined in a site shell script can be set in the +environment passed to `configure'. However, some packages may run +configure again during the build, and the customized values of these +variables may be lost. In order to avoid this problem, you should set +them in the `configure' command line, using `VAR=value'. For example: + + ./configure CC=/usr/local2/bin/gcc + +will cause the specified gcc to be used as the C compiler (unless it is +overridden in the site shell script). + +`configure' Invocation +====================== + + `configure' recognizes the following options to control how it +operates. + +`--help' +`-h' + Print a summary of the options to `configure', and exit. + +`--version' +`-V' + Print the version of Autoconf used to generate the `configure' + script, and exit. + +`--cache-file=FILE' + Enable the cache: use and save the results of the tests in FILE, + traditionally `config.cache'. FILE defaults to `/dev/null' to + disable caching. + +`--config-cache' +`-C' + Alias for `--cache-file=config.cache'. + +`--quiet' +`--silent' +`-q' + Do not print messages saying which checks are being made. To + suppress all normal output, redirect it to `/dev/null' (any error + messages will still be shown). + +`--srcdir=DIR' + Look for the package's source code in directory DIR. Usually + `configure' can determine that directory automatically. + +`configure' also accepts some other, not widely useful, options. Run +`configure --help' for more details. + diff --git a/Makefile.am b/Makefile.am new file mode 100644 index 0000000..df93163 --- /dev/null +++ b/Makefile.am @@ -0,0 +1,6 @@ +SUBDIRS=src tests + +pkgconfigdir = $(libdir)/pkgconfig +pkgconfig_DATA = xcb.pc + +EXTRA_DIST=xcb.pc.in diff --git a/autogen.sh b/autogen.sh new file mode 100755 index 0000000..d68a142 --- /dev/null +++ b/autogen.sh @@ -0,0 +1,3 @@ +#! /bin/sh +autoreconf -v --install || exit 1 +./configure "$@" diff --git a/configure.ac b/configure.ac new file mode 100644 index 0000000..903eeed --- /dev/null +++ b/configure.ac @@ -0,0 +1,84 @@ +# -*- Autoconf -*- +# Process this file with autoconf to produce a configure script. + +AC_PREREQ(2.57) +AC_INIT([libXCB], + 0.9, + [xcb@lists.freedesktop.org]) +AC_CONFIG_SRCDIR([xcb.pc.in]) +AM_INIT_AUTOMAKE([foreign dist-bzip2]) + +dnl This ifdef has no useful effect prior to automake 1.9, but in 1.9 +dnl it allows the user to not have check.m4 installed. +m4_ifdef([AM_PATH_CHECK],[ +AM_PATH_CHECK(0.8.2, [HAVE_CHECK=true], [HAVE_CHECK=false]) +]) +AM_CONDITIONAL(HAVE_CHECK, test x$HAVE_CHECK = xtrue) + +AC_CONFIG_HEADERS([src/config.h]) + +AC_PROG_LIBTOOL +AC_PROG_CC + +AC_PATH_PROG(XSLTPROC, xsltproc, no) +if test "$XSLTPROC" = "no"; then + AC_MSG_ERROR([XCB requires xsltproc.]) +fi + +HTML_CHECK_RESULT=false +if test x"$HAVE_CHECK" = xtrue; then + if test x"$XSLTPROC" != xno; then + HTML_CHECK_RESULT=true + fi +fi +AC_SUBST(HTML_CHECK_RESULT) + +# Checks for pkg-config packages +PKG_CHECK_MODULES(XCBPROTO, xcb-proto >= 0.9) +PKG_CHECK_MODULES(XPROTO, xproto) +PKG_CHECK_MODULES(XAU, xau) + +# Find the xcb-proto protocol descriptions +AC_MSG_CHECKING(XCBPROTO_XCBINCLUDEDIR) +XCBPROTO_XCBINCLUDEDIR=`$PKG_CONFIG --variable=xcbincludedir xcb-proto` +AC_MSG_RESULT($XCBPROTO_XCBINCLUDEDIR) +AC_SUBST(XCBPROTO_XCBINCLUDEDIR) + +AC_HEADER_STDC +AC_SEARCH_LIBS(gethostbyname, nsl) +AC_SEARCH_LIBS(connect, socket) + +xcbincludedir='${includedir}/X11/XCB' +AC_SUBST(xcbincludedir) + +AC_ARG_WITH(opt, +AC_HELP_STRING([--with-opt], [compile with reasonable optimizations]) +AC_HELP_STRING([--with-opt=FLAGS], [compile with specified FLAGS]) +AC_HELP_STRING([--with-opt=small], [compile for smallest code]) +AC_HELP_STRING([--with-opt=debug], [compile for debugging (default)]), +[ + case "$withval" in + yes) + optflags="-O3" + ;; + small) + optflags="-Os -fomit-frame-pointer -DNDEBUG" + ;; + no|debug) + optflags="-g" + ;; + *) + optflags="$withval" + ;; + esac +]) +AC_CACHE_CHECK([what compiler optimizations to apply], [optflags], [optflags="-g"]) +AC_DEFINE(_XOPEN_SOURCE, 500, [Conform to Single Unix Specification.]) +CDEBUGFLAGS="$optflags -Wall -pedantic -Wpointer-arith \ + -Wstrict-prototypes -Wmissing-declarations -Wnested-externs" +AC_SUBST(CDEBUGFLAGS) + +AC_CONFIG_FILES([Makefile src/Makefile tests/Makefile]) +AC_CONFIG_FILES([xcb.pc]) + +AC_OUTPUT diff --git a/debian/.cvsignore b/debian/.cvsignore new file mode 100644 index 0000000..cad8b05 --- /dev/null +++ b/debian/.cvsignore @@ -0,0 +1,6 @@ +compat +copyright +fd.o-* +stamp-* +tmp +files diff --git a/debian/changelog b/debian/changelog new file mode 100644 index 0000000..148dd94 --- /dev/null +++ b/debian/changelog @@ -0,0 +1,41 @@ +libxcb0 (0.9-1pre2v4) unstable; urgency=low + + pre2v1: + * Split into libxcb0 and libxcb0-dev. + * Change control file for new packages. + * Add install and dirs files for new packages. + * Update Build-Depends for renaming of fd.o-xau, fd.o-xproto, and + fd.o-xcb-proto. + * Remove fd.o prefix from package name. + * Change Maintainer to xcb@lists.freedesktop.org, move myself to + Uploaders, and add Jamey Sharp to Uploaders. Update copyright.debian + accordingly. + * Add Bugs field pointing to xcb@lists.freedesktop.org. + * Update homepage URL in description and copyright.debian to + http://xcb.freedesktop.org, and put it in a Homepage: field in the + description. + + pre2v2: + * Add libxcb0-dbg package. + + pre2v3: + * New upstream snapshot. + + pre2v4: + * New upstream snapshot. + + -- Josh Triplett <josh@freedesktop.org> Tue, 17 May 2005 12:53:53 -0700 + +fd.o-xcb (0.9-1) unstable; urgency=low + + * New version using XSLT; works with XML descriptions in xcb-proto 0.9. + * Updated Debian packaging. + + -- Josh Triplett <josh@freedesktop.org> Fri, 29 Oct 2004 15:11:09 -0700 + +fd.o-xcb (0.8-1) unstable; urgency=low + + * Initial Release. + + -- Jamey Sharp <sharpone@debian.org> Thu, 18 Mar 2004 00:09:03 -0800 + diff --git a/debian/control b/debian/control new file mode 100644 index 0000000..33c61c0 --- /dev/null +++ b/debian/control @@ -0,0 +1,56 @@ +Source: libxcb0 +Priority: optional +Maintainer: XCB Developers <xcb@lists.freedesktop.org> +Uploaders: Jamey Sharp <sharpone@debian.org>, Josh Triplett <josh@freedesktop.org> +Build-Depends: x-dev, libxau-dev, xcb-proto, cdbs, debhelper (>= 4.1.76), pkg-config, autoconf, automake1.9 | automaken, libtool, xsltproc, check, binutils (>= 2.12.90.0.9) +Build-Conflicts: automake1.4, automake1.5, automake1.6 +Standards-Version: 3.6.1 +Bugs: mailto:xcb@lists.freedesktop.org + +Package: libxcb0 +Section: libs +Architecture: any +Depends: ${shlibs:Depends}, ${misc:Depends} +Description: X C Binding + Xlib has been the standard C binding for the X Window System protocol for + many years now. It is an excellent piece of work, but there are applications + for which it is not ideal. XCB builds on nearly two decades of experience + with X specifically and software engineering in general in an effort to + replace the aging Xlib code base. + . + This package contains the library files needed to run software using + XCB. + . + Homepage: http://xcb.freedesktop.org + +Package: libxcb0-dev +Section: libdevel +Architecture: any +Depends: libxcb0 (= ${Source-Version}), x-dev +Description: X C Binding, development files + Xlib has been the standard C binding for the X Window System protocol for + many years now. It is an excellent piece of work, but there are applications + for which it is not ideal. XCB builds on nearly two decades of experience + with X specifically and software engineering in general in an effort to + replace the aging Xlib code base. + . + This package contains the header and library files needed to build software + using XCB. + . + Homepage: http://xcb.freedesktop.org + +Package: libxcb0-dbg +Section: libdevel +Architecture: any +Depends: libxcb0 (= ${Source-Version}) +Description: X C Binding, debugging symbols + Xlib has been the standard C binding for the X Window System protocol for + many years now. It is an excellent piece of work, but there are applications + for which it is not ideal. XCB builds on nearly two decades of experience + with X specifically and software engineering in general in an effort to + replace the aging Xlib code base. + . + This package contains the debugging symbols associated with libxcb0. gdb will + automatically use these symbols when debugging libxcb0. + . + Homepage: http://xcb.freedesktop.org diff --git a/debian/copyright.debian b/debian/copyright.debian new file mode 100644 index 0000000..7cd330a --- /dev/null +++ b/debian/copyright.debian @@ -0,0 +1,12 @@ +This package was debianized by Jamey Sharp <sharpone@debian.org> on +Thu, 18 Mar 2004 00:48:42 -0800, and later updated by Josh Triplett +<josh@freedesktop.org>. The package is co-maintained by the XCB developers +via the XCB mailing list <xcb@lists.freedesktop.org>. + +It was downloaded from http://xcb.freedesktop.org. + +Upstream Authors: Jamey Sharp <sharpone@debian.org> + Josh Triplett <josh@freedesktop.org> + +Copyright: + diff --git a/debian/libxcb0-dev.dirs b/debian/libxcb0-dev.dirs new file mode 100644 index 0000000..4418816 --- /dev/null +++ b/debian/libxcb0-dev.dirs @@ -0,0 +1,2 @@ +usr/lib +usr/include diff --git a/debian/libxcb0-dev.install b/debian/libxcb0-dev.install new file mode 100644 index 0000000..5ab44bc --- /dev/null +++ b/debian/libxcb0-dev.install @@ -0,0 +1,5 @@ +usr/X11R6/include/X11/* +usr/lib/lib*.a +usr/lib/lib*.so +usr/lib/pkgconfig/* +usr/lib/*.la diff --git a/debian/libxcb0.dirs b/debian/libxcb0.dirs new file mode 100644 index 0000000..6845771 --- /dev/null +++ b/debian/libxcb0.dirs @@ -0,0 +1 @@ +usr/lib diff --git a/debian/libxcb0.install b/debian/libxcb0.install new file mode 100644 index 0000000..d0dbfd1 --- /dev/null +++ b/debian/libxcb0.install @@ -0,0 +1 @@ +usr/lib/lib*.so.* diff --git a/debian/rules b/debian/rules new file mode 100755 index 0000000..e81cbea --- /dev/null +++ b/debian/rules @@ -0,0 +1,22 @@ +#!/usr/bin/make -f + +DEB_DH_INSTALL_SOURCEDIR=debian/tmp + +include /usr/share/cdbs/1/rules/debhelper.mk +include /usr/share/cdbs/1/class/autotools.mk + +DEB_CONFIGURE_EXTRA_FLAGS = --with-opt +DEB_CONFIGURE_INCLUDEDIR = "\$${prefix}/X11R6/include" +DEB_DH_STRIP_ARGS=--dbg-package=libxcb0 + +debian/stamp-autotools-files: + autoreconf -v --install + touch debian/stamp-autotools-files + +debian/copyright: debian/copyright.debian COPYING + cat $+ > $@ + +clean:: + -rm -f debian/copyright + +common-install-prehook-arch common-install-prehook-indep:: debian/copyright diff --git a/doc/tutorial/index.html b/doc/tutorial/index.html new file mode 100755 index 0000000..ac6e502 --- /dev/null +++ b/doc/tutorial/index.html @@ -0,0 +1,3772 @@ +<!DOCTYPE html public "-//W3C//DTD HTML 4.01 Transitional//EN" +"http://www.w3.org/TR/html4/loose.dtd"> + +<html> + +<head> + <title>Basic Graphics Programming With The XCB Library</title> + <link href="xcb.css" rel="stylesheet" type="text/css" /> +</head> + +<body> + <div class="title"> + Basic Graphics Programming With The XCB Library + </div> + <div class="toc"> + <ol> + <li><a class="section" href="#intro">Introduction</a></li> + <li><a class="section" href="#Xmodel">The client and server model of the X window system</a></li> + <li><a class="section" href="#asynch">GUI programming: the asynchronous model</a></li> + <li><a class="section" href="#notions">Basic XCB notions</a></li> + <ol> + <li><a class="subsection" href="#conn">The X Connection</a></li> + <li><a class="subsection" href="#requestsreplies">Requests and replies: the Xlib killers</a></li> + <li><a class="subsection" href="#gc">The Graphics Context</a></li> + <li>Object handles</li> + <li>Memory allocation for XCB structures</li> + <li><a class="subsection" href="#events">Events</a></li> + </ol> + <li><a class="section" href="#use">Using XCB-based programs</a></li> + <ol> + <li><a class="subsection" href="#inst">Installation of XCB</a></li> + <li><a class="subsection" href="#comp">Compiling XCB-based programs</a></li> + </ol> + <li><a class="section" href="#openconn">Opening and closing the connection to an X server</a></li> + <li><a class="section" href="#screen">Checking basic information about a connection</a></li> + <li><a class="section" href="#helloworld">Creating a basic window - the "hello world" program</a></li> + <li><a class="section" href="#drawing">Drawing in a window</a></li> + <ol> + <li><a class="subsection" href="#allocgc">Allocating a Graphics Context</a></li> + <li><a class="subsection" href="#changegc">Changing the attributes of a Graphics Context</a></li> + <li><a class="subsection" href="#drawingprim">Drawing primitives: point, line, box, circle,...</a></li> + </ol> + <li><a class="section" href="#xevents">X Events</a></li> + <ol> + <li><a class="subsection" href="#register">Registering for event types using event masks</a></li> + <li><a class="subsection" href="#loop">Receiving events: writing the events loop</a></li> + <li><a class="subsection" href="#expose">Expose events</a></li> + <li><a class="subsection" href="#userinput">Getting user input</a></li> + <ol> + <li><a class="subsubsection" href="#mousepressrelease">Mouse button press and release events</a></li> + <li><a class="subsubsection" href="#mousemvnt">Mouse movement events</a></li> + <li><a class="subsubsection" href="#mouseenter">Mouse pointer enter and leave events</a></li> + <li><a class="subsubsection" href="#focus">The keyboard focus</a></li> + <li><a class="subsubsection" href="#keypress">Keyboard press and release events</a></li> + </ol> + <li><a class="subsection" href="#eventex">X events: a complete example</a></li> + </ol> + <li><a class="section" href="#font">Handling text and fonts</a></li> + <ol> + <li><a class="subsection" href="#fontstruct">The Font structure</a></li> + <li>Loading a Font</li> + <li>Assigning a Font to a Graphic Context</li> + <li>Drawing text in a window</li> + </ol> + <li>Windows hierarchy</li> + <ol> + <li>Root, parent and child windows</li> + <li>Events propagation</li> + </ol> + <li><a class="section" href="#wm">Interacting with the window manager</a></li> + <ol> + <li><a class="subsection" href="#wmprop">Window properties</a></li> + <li><a class="subsection" href="#wmname">Setting the window name and icon name</a></li> + <li>Setting preferred window size(s)</li> + <li>Setting miscellaneous window manager hints</li> + <li>Setting an application's icon</li> + </ol> + <li><a class="section" href="#winop">Simple window operations</a></li> + <ol> + <li><a class="subsection" href="#winmap">Mapping and un-mapping a window</a></li> + <li><a class="subsection" href="#winconf">Configuring a window</a></li> + <li><a class="subsection" href="#winmove">Moving a window around the screen</a></li> + <li><a class="subsection" href="#winsize">Resizing a window</a></li> + <li><a class="subsection" href="#winstack">Changing windows stacking order: raise and lower</a></li> + <li>Iconifying and de-iconifying a window</li> + <li><a class="subsection" href="#wingetinfo">Getting informations about a window</a></li> + </ol> + <li><a class="section" href="#usecolor">Using colors to paint the rainbow</a></li> + <ol> + <li><a class="subsection" href="#colormap">Color maps</a></li> + <li><a class="subsection" href="#colormapalloc">Allocating and freeing Color Maps</a></li> + <li><a class="subsection" href="#alloccolor">Allocating and freeing a color entry</a></li> + <li>Drawing with a color</li> + </ol> + <li><a class="section" href="#pixmaps">X Bitmaps and Pixmaps</a></li> + <ol> + <li><a class="subsection" href="#pixmapswhat">What is a X Bitmap ? An X Pixmap ?</a></li> + <li>Loading a bitmap from a file</li> + <li>Drawing a bitmap in a window</li> + <li><a class="subsection" href="#pixmapscreate">Creating a pixmap</a></li> + <li><a class="subsection" href="#pixmapsdraw">Drawing a pixmap in a window</a></li> + <li><a class="subsection" href="#pixmapsfree">Freeing a pixmap</a></li> + </ol> + <li>Messing with the mouse cursor</li> + <ol> + <li>Creating and destroying a mouse cursor</li> + <li>Setting a window's mouse cursor</li> + </ol> + <li><a class="subsection" href="#translation">Translation of basic Xlib functions and macros</a></li> + <ol> + <li><a class="subsection" href="#displaystructure">Members of the Display structure</a></li> + <ol> + <li><a class="subsection" href="#ConnectionNumber">ConnectionNumber</a></li> + <li><a class="subsection" href="#DefaultScreen">DefaultScreen</a></li> + <li><a class="subsection" href="#QLength">QLength</a></li> + <li><a class="subsection" href="#ScreenCount">ScreenCount</a></li> + <li><a class="subsection" href="#ServerVendor">ServerVendor</a></li> + <li><a class="subsection" href="#ProtocolVersion">ProtocolVersion</a></li> + <li><a class="subsection" href="#ProtocolRevision">ProtocolRevision</a></li> + <li><a class="subsection" href="#VendorRelease">VendorRelease</a></li> + <li><a class="subsection" href="#DisplayString">DisplayString</a></li> + <li><a class="subsection" href="#BitmapUnit">BitmapUnit</a></li> + <li><a class="subsection" href="#BitmapBitOrder">BitmapBitOrder</a></li> + <li><a class="subsection" href="#BitmapPad">BitmapPad</a></li> + <li><a class="subsection" href="#ImageByteOrder">ImageByteOrder</a></li> + </ol> + <li><a class="subsection" href="#screenofdisplay">ScreenOfDisplay related functions</a></li> + <ol> + <li><a class="subsection" href="#ScreenOfDisplay">ScreenOfDisplay</a></li> + <li><a class="subsection" href="#DefaultScreenOfDisplay">DefaultScreenOfDisplay</a></li> + <li><a class="subsection" href="#RootWindow">RootWindow / RootWindowOfScreen</a></li> + <li><a class="subsection" href="#DefaultRootWindow">DefaultRootWindow</a></li> + <li><a class="subsection" href="#DefaultVisual">DefaultVisual / DefaultVisualOfScreen</a></li> + <li><a class="subsection" href="#DefaultGC">DefaultGC / DefaultGCOfScreen</a></li> + <li><a class="subsection" href="#BlackPixel">BlackPixel / BlackPixelOfScreen</a></li> + <li><a class="subsection" href="#WhitePixel">WhitePixel / WhitePixelOfScreen</a></li> + <li><a class="subsection" href="#DisplayWidth">DisplayWidth / WidthOfScreen</a></li> + <li><a class="subsection" href="#DisplayHeight">DisplayHeight / HeightOfScreen</a></li> + <li><a class="subsection" href="#DisplayWidthMM">DisplayWidthMM / WidthMMOfScreen</a></li> + <li><a class="subsection" href="#DisplayHeightMM">DisplayHeightMM / HeightMMOfScreen</a></li> + <li><a class="subsection" href="#DisplayPlanes">DisplayPlanes / DefaultDepth / DefaultDepthOfScreen / PlanesOfScreen</a></li> + <li><a class="subsection" href="#DefaultColormap">DefaultColormap / DefaultColormapOfScreen</a></li> + <li><a class="subsection" href="#MinCmapsOfScreen">MinCmapsOfScreen</a></li> + <li><a class="subsection" href="#MaxCmapsOfScreen">MaxCmapsOfScreen</a></li> + <li><a class="subsection" href="#DoesSaveUnders">DoesSaveUnders</a></li> + <li><a class="subsection" href="#DoesBackingStore">DoesBackingStore</a></li> + <li><a class="subsection" href="#EventMaskOfScreen">EventMaskOfScreen</a></li> + </ol> + <li><a class="subsection" href="#misc">Miscellaneaous macros</a></li> + <ol> + <li><a class="subsection" href="#DisplayOfScreen">DisplayOfScreen</a></li> + <li><a class="subsection" href="#DisplayCells">DisplayCells / CellsOfScreen</a></li> + </ol> + </ol> + </ol> + </div> + <div class="section"> + <ol> + <li class="title"><a name="intro">Introduction</a></li> + <p> + This tutorial is based on the + <a href="http://users.actcom.co.il/~choo/lupg/tutorials/xlib-programming/xlib-programming.html">Xlib Tutorial</a> + written by <a href="mailto:choor@atcom.co.il">Guy Keren</a>. The + author allowed me to take some parts of his text, mainly the text which + deals with the X Windows generality. + </p> + <p> + This tutorial is intended to people who want to start to program + with the <a href="http://xcb.freedesktop.org">XCB</a> + library. As for the <a href="http://tronche.com/gui/x/xlib/introduction">Xlib</a> + library, it is useless and a real X + programmer should use a much higher level of abstraction, such + as using Motif, + <a href="http://www.lesstif.org">LessTiff</a>, + <a href="http://www.gtk.org">GTK</a>, + <a href="http://www.trolltech.com">QT</a> or + <a href="http://www.enlightenment.org">EWL</a>. However, + we need to start somewhere. More than this, knowing how things + work down below is never a bad idea. + </p> + <p> + After reading this tutorial, one should be able to write very + simple graphical programs, but not programs with a descent user + interface. For such programs, one of the previously mentioned + library should be used. + </p> + <p> + But what is XCB ? Xlib has been + the standard C binding for the <a href="http://www.xfree86.org">X + Window System</a> protocol for many years now. It is an + excellent piece of work, but there are applications for which it + is not ideal, for example + <ul> + <li><b>Small platforms</b>: Xlib is a large piece of code, and + it's difficult to make it smaller</li> + <li><b>Latency hiding</b>: Xlib requests requiring a reply are + effectively synchronous: they block until the reply appears, + whether the result is needed immediately or not.</li> + <li><b>Direct access to the protocol</b>: Xlib does quite a + bit of caching, layering, and similar optimizations. While this + is normally a feature, it makes it difficult to simply emit + specified X protocol requests and process specific + responses.</li> + <li><b>Threaded applications</b>: While Xlib does attempt to + support multithreading, the API makes this difficult and + error-prone.</li> + <li><b>New extensions</b>: The Xlib infrastructure provides + limited support for the new creation of X extension client side + code.</li> + </ul> + </p> + <p> + For these reasons, among others, XCB, an X C binding, has been + designed to solve the above problems and thus provide a base for + <ul> + <li>Toolkit implementation.</li> + <li>Direct protocol-level programming.</li> + <li>Lightweight emulation of commonly used portions of the + Xlib API (in progress)</li> + </ul> + </p> + <p></p> + <li class="title"><a name="Xmodel">The client and server model of the X window system</a></li> + <p> + The X Window System was developed with one major goal: + flexibility. The idea was that the way things look is one thing, + but the way things work is another matter. Thus, the lower + levels provide the tools required to draw windows, handle user + input, allow drawing graphics using colors (or black and white + screens), etc. To this point, a decision was made to separate + the system into two parts. A client that decides what to do, and + a server that actually draws on the screen and reads user input + in order to send it to the client for processing. + </p> + <p> + This model is the complete opposite of what is used to when + dealing with clients and servers. In our case, the user seats + near the machine controlled by the server, while the client + might be running on a remote machine. The server controls the + screens, mouse and keyboard. A client may connect to the server, + request that it draws a window (or several windows), and ask the + server to send it any input the user sends to these + windows. Thus, several clients may connect to a single X server + (one might be running an mail software, one running a WWW + browser, etc). When input is sent by the user to some window, + the server sends a message to the client controlling this window + for processing. The client decides what to do with this input, + and sends the server requests for drawing in the window. + </p> + <p> + The whole session is carried out using the X message + protocol. This protocol was originally carried over the TCP/IP + protocol suite, allowing the client to run on any machine + connected to the same network that the server is. Later on, the + X servers were extended to allow clients running on the local + machine with more optimized access to the server (note that an X + protocol message may be several hundreds of KB in size), such as + using shred memory, or using Unix domain sockets (a method for + creating a logical channel on a Unix system between two processors). + </p> + <li class="title"><a name="asynch">GUI programming: the asynchronous model</a></li> + <p> + Unlike conventional computer programs, that carry some serial + nature, a GUI program usually uses an asynchronous programming + model, also known as "event-driven programming". This means that + that program mostly sits idle, waiting for events sent by the X + server, and then acts upon these events. An event may say "The + user pressed the 1st button mouse in spot (x,y)", or "The window + you control needs to be redrawn". In order for the program to e + responsive to the user input, as well as to refresh requests, it + needs to handle each event in a rather short period of time + (e.g. less that 200 milliseconds, as a rule of thumb). + </p> + <p> + This also implies that the program may not perform operations + that might take a long time while handling an event (such as + opening a network connection to some remote server, or + connecting to a database server, or even performing a long file + copy operation). Instead, it needs to perform all these + operations in an asynchronous manner. This may be done by using + various asynchronous models to perform the longish operations, + or by performing them in a different process or thread. + </p> + <p> + So the way a GUI program looks is something like that: + <ol> + <li>Perform initialization routines.</li> + <li>Connect to the X server.</li> + <li>Perform X-related initialization.</li> + <li>While not finished:</li> + <ol> + <li>Receive the next event from the X server.</li> + <li>Handle the event, possibly sending various drawing + requests to the X server.</li> + <li>If the event was a quit message, exit the loop.</li> + </ol> + <li>Close down the connection to the X server. </li> + <li>Perform cleanup operations.</li> + </ol> + </p> + <p></p> + <li class="title"><a name="notions">Basic XCB notions</a></li> + <p> + XCB has been created to eliminate the needs of + programs to actually implement the X protocol layer. This + library gives a program a very low-level access to any X + server. Since the protocol is standardized, a client using any + implementation of XCB may talk with any X server (the same + occurs for Xlib, of course). We now give a brief description of + the basic XCB notions. They will be detailed later. + </p> + <ol> + <li class="subtitle"><a name="conn">The X Connection</a></li> + <p> + The major notion of using XCB is the X Connection. This is a + structure representing the connection we have open with a + given X server. It hides a queue of messages coming from the + server, and a queue of pending requests that our client + intends to send to the server. In XCB, this structure is named + 'XCBConnection'. When we open a connection to an X server, the + library returns a pointer to such a structure. Later, we + supply this pointer to any XCB function that should send + messages to the X server or receive messages from this server. + </p> + <li class="subtitle"><a name="requestsreplies">Requests and + replies: the Xlib killers</a></li> + <p> + To ask informations to the X server, we have to make a request + and ask for a reply. With Xlib, these two tasks are + automatically done: Xlib locks the system, sends a request, + waits for a reply from the X server and unlocks. This is + annoying, especially if one makes a lot of requests to the X + server. Indeed, Xlib has to wait for the end of a reply + before asking for the next request (because of the locks that + Xlib sends). For example, here is a time-line of N=4 + requests/replies with Xlib, with a round-trip latency + <b>T_round_trip</b> that is 5 times long as the time required + to write or read a request/reply (<b>T_write/T_read</b>): + </p> + <pre class="text"> + W-----RW-----RW-----RW-----R +</pre> + <ul> + <li>W: Writing request</li> + <li>-: Stalled, waiting for data</li> + <li>R: Reading reply</li> + </ul> + <p> + The total time is N * (T_write + T_round_trip + T_read). + </p> + <p> + With XCB, we can suppress most of the round-trips as the + requests and the replies are not locked. We usually send a + request, then XCB returns to us a <b>cookie</b>, which is an + identifier. Then, later, we ask for a reply using this + <b>cookie</b> and XCB returns a + pointer to that reply. Hence, with XCB, we can send a lot of + requests, and later in the program, ask for all the replies + when we need them. Here is the time-line for 4 + requests/replies when we use this property of XCB: + </p> + <pre class="text"> + WWWW--RRRR +</pre> + <p> + The total time is N * T_write + max (0, T_round_trip - (N-1) * + T_write) + N * T_read. Which can be considerably faster than + all those Xlib round-trips. + </p> + <p> + Here is a program that computes the time to create 500 atoms + with Xlib and XCB. It shows the Xlib way, the bad XCB way + (which is similar to Xlib) and the good XCB way. On my + computer, XCB is 25 times faster than Xlib. + </p> + <pre class="code"> +#include <stdlib.h> +#include <stdio.h> +#include <string.h> +#include <sys/time.h> + +#include <X11/XCB/xcb.h> + +#include <X11/Xlib.h> + +double +get_time(void) +{ + struct timeval timev; + + gettimeofday(&timev, NULL); + + return (double)timev.tv_sec + (((double)timev.tv_usec) / 1000000); +} + +int +main () +{ + XCBConnection *c; + XCBATOM *atoms; + XCBInternAtomCookie *cs; + char **names; + int count; + int i; + double start; + double end; + double diff; + + /* Xlib */ + Display *disp; + Atom *atoms_x; + double diff_x; + + c = XCBConnectBasic (); + + count = 500; + atoms = (XCBATOM *)malloc (count * sizeof (atoms)); + names = (char **)malloc (count * sizeof (char *)); + + /* init names */ + for (i = 0; i < count; ++i) + { + char buf[100]; + + sprintf (buf, "NAME%d", i); + names[i] = strdup (buf); + } + + /* bad use */ + start = get_time (); + + for (i = 0; i < count; ++i) + atoms[i] = XCBInternAtomReply (c, + XCBInternAtom (c, + 0, + strlen(names[i]), + names[i]), + NULL)->atom; + + end = get_time (); + diff = end - start; + printf ("bad use time : %f\n", diff); + + /* good use */ + start = get_time (); + + cs = (XCBInternAtomCookie *) malloc (count * sizeof(XCBInternAtomCookie)); + for(i = 0; i < count; ++i) + cs[i] = XCBInternAtom (c, 0, strlen(names[i]), names[i]); + + for(i = 0; i < count; ++i) + { + XCBInternAtomRep *r; + + r = XCBInternAtomReply(c, cs[i], 0); + if(r) + atoms[i] = r->atom; + free(r); + } + + end = get_time (); + printf ("good use time : %f\n", end - start); + printf ("ratio : %f\n", diff / (end - start)); + diff = end - start; + + /* free var */ + for (i = 0; i < count; ++i) + { + free (names[i]); + } + free (atoms); + free (cs); + + XCBDisconnect (c); + + /* Xlib */ + disp = XOpenDisplay (getenv("DISPLAY")); + + atoms_x = (Atom *)malloc (count * sizeof (atoms_x)); + + start = get_time (); + + for (i = 0; i < count; ++i) + atoms_x[i] = XInternAtom(disp, names[i], 0); + + end = get_time (); + diff_x = end - start; + printf ("Xlib use time : %f\n", diff_x); + printf ("ratio : %f\n", diff_x / diff); + + free (atoms_x); + free (names); + + XCloseDisplay (disp); + + return 1; +} +</pre> + <li class="subtitle"><a name="gc">The Graphic Context</a></li> + <p> + When we perform various drawing operations (graphics, text, + etc), we may specify various options for controlling how the + data will be drawn (what foreground and background colors to + use, how line edges will be connected, what font to use when + drawing some text, etc). In order to avoid the need to supply + hundreds of parameters to each drawing function, a graphical + context structure is used. We set the various drawing options + in this structure, and then, we pass a pointer to this + structure to any drawing routines. This is rather handy, as we + often need to perform several drawing requests with the same + options. Thus, we would initialize a graphical context, set + the desired options, and pass this structure to all drawing + functions. + </p> + <p> + Note that graphic contexts have no client-side structure in + XCB, they're just XIDs. Xlib has a client-side structure + because it caches the GC contents so it can avoid making + redundant requests, but of course XCB doesn't do that. + </p> + <li class="subtitle"><a name="events">Events</a></li> + <p> + A structure is used to pass events received from the X + server. XCB supports exactly the events specified in the + protocol (33 events). This structure contains the type + of event received, as well as the data associated with the + event (e.g. position on the screen where the event was + generated, mouse button associated with the event, region of + the screen associated with a "redraw" event, etc). The way to + read the event's data epends on the event type. + </p> + </ol> + <p></p> + <li class="title"><a name="use">Using XCB-based programs</a></li> + <p></p> + <ol> + <li class="subtitle"><a name="inst">Installation of XCB</a></li> + <p> + To build XCB from source, you need to have installed at + least: + </p> + <ul> + <li>pkgconfig 0.15.0</li> + <li>automake 1.7</li> + <li>autoconf 2.50</li> + <li><a href="http://www.check.org">check</a></li> + <li><a href="http://xmlsoft.org/XSLT/">xsltproc</a></li> + </ul> + <p> + You have to checkout in CVS the following modules: + </p> + <ul> + <li>Xproto from xlibs</li> + <li>Xau from xlibs</li> + <li>xcb-proto</li> + <li>xcb</li> + </ul> + <p> + Note that Xproto and xcb-proto exist only to install header + files, so typing 'make' or 'make all' will produce the message + "Nothing to be done for 'all'". That's normal. + </p> + <li class="subtitle"><a name="comp">Compiling XCB-based programs</a></li> + <p> + Compiling XCB-based programs requires linking them with the XCB + library. This is easily done thanks to pkgconfig: + </p> + <pre class="text"> +gcc -Wall prog.c -o prog `pkg-config --cflags --libs xcb` +</pre> + </ol> + <li class="title"><a name="openconn">Opening and closing the connection to an X server</a></li> + <p> + An X program first needs to open the connection to the X + server. There is a function that opens a connection. It requires + the display name, or NULL. In the latter case, the display name + will be the one in the environment variable DISPLAY. + </p> + <pre class="code"> +XCBConnection *XCBConnect (const char *displayname, + int *screenp); +</pre> + <p> + The second parameter returns the screen number used for the + connection. The returned structure describes an XCB connection + and is opaque. Here is how the connection can be opened: + </p> + <pre class="code"> +#include <X11/XCB/xcb.h> + +int +main (int argc, char *argv[]) +{ + XCBConnection *c; + + /* Open the connection to the X server. use the DISPLAY environment variable as the default display name */ + c = XCBConnect (NULL, NULL); + + return 1; +} +</pre> + <p> + To close a connection, it suffices to use: + </p> + <pre class="code"> +void XCBDisconnect (XCBConnection *c); +</pre> + <div class="comp"> + <div class="title"> + Comparison Xlib/XCB + </div> + <div class="xlib"> + <ul> + <li>XOpenDisplay ()</li> + </ul> + </div> + <div class="xcb"> + <ul> + <li>XCBConnect ()</li> + </ul> + </div> + <div class="xlib"> + <ul> + <li>XCloseDisplay ()</li> + </ul> + </div> + <div class="xcb"> + <ul> + <li>XCBDisconnect ()</li> + </ul> + </div> + </div> + <p> + </p> + <li class="title"><a name="screen">Checking basic information about a connection</a></li> + <p> + Once we opened a connection to an X server, we should check some + basic informations about it: what screens it has, what is the + size (width and height) of the screen, how many colors it + supports (black and white ? grey scale ?, 256 colors ? more ?), + and so on. We get such informations from the XCBSCREEN + structure: + </p> + <pre class="code"> +typedef struct { + XCBWINDOW root; + XCBCOLORMAP default_colormap; + CARD32 white_pixel; + CARD32 black_pixel; + CARD32 current_input_masks; + CARD16 width_in_pixels; + CARD16 height_in_pixels; + CARD16 width_in_millimeters; + CARD16 height_in_millimeters; + CARD16 min_installed_maps; + CARD16 max_installed_maps; + XCBVISUALID root_visual; + BYTE backing_stores; + BOOL save_unders; + CARD8 root_depth; + CARD8 allowed_depths_len; +} XCBSCREEN; +</pre> + <p> + We could retrieve the first screen of the connection by using the + following function: + </p> + <pre class="code"> +XCBSCREENIter XCBConnSetupSuccessRepRootsIter (XCBConnSetupSuccessRep *R); +</pre> + <p> + Here is a small program that shows how to use this function: + </p> + <pre class="code"> +#include <stdio.h> + +#include <X11/XCB/xcb.h> + +int +main (int argc, char *argv[]) +{ + XCBConnection *c; + XCBSCREEN *screen; + int screen_nbr; + XCBSCREENIter iter; + + /* Open the connection to the X server. Use the DISPLAY environment variable */ + c = XCBConnect (NULL, &screen_nbr); + + /* Get the screen #screen_nbr */ + iter = XCBConnSetupSuccessRepRootsIter (XCBGetSetup (c)); + for (; iter.rem; --screen_nbr, XCBSCREENNext (&iter)) + if (screen_nbr == 0) + { + screen = iter.data; + break; + } + + printf ("\n"); + printf ("Informations of screen %ld:\n", screen->root.xid); + printf (" width.........: %d\n", screen->width_in_pixels); + printf (" height........: %d\n", screen->height_in_pixels); + printf (" white pixel...: %ld\n", screen->white_pixel); + printf (" black pixel...: %ld\n", screen->black_pixel); + printf ("\n"); + + return 1; +} +</pre> + <li class="title"><a name="helloworld">Creating a basic window - the "hello world" program</a></li> + <p> + After we got some basic informations about our screen, we can + create our first window. In the X Window System, a window is + characterized by an Id. So, in XCB, a window is of type: + </p> + <pre class="code"> +typedef struct { + CARD32 xid; +} XCBWINDOW; +</pre> + <p> + We first ask for a new Id for our window, with this function: + </p> + <pre class="code"> +XCBWINDOW XCBWINDOWNew(XCBConnection *c); +</pre> + <p> + Then, XCB supplies the following function to create new windows: + </p> + <pre class="code"> +XCBVoidCookie XCBCreateWindow (XCBConnection *c, /* Pointer to the XCBConnection structure */ + CARD8 depth, /* Depth of the screen */ + XCBWINDOW wid, /* Id of the window */ + XCBWINDOW parent, /* Id of an existing window that should be the parent of the new window */ + INT16 x, /* X position of the top-left corner of the window (in pixels) */ + INT16 y, /* Y position of the top-left corner of the window (in pixels) */ + CARD16 width, /* Width of the window (in pixels) */ + CARD16 height, /* Height of the window (in pixels) */ + CARD16 border_width, /* Width of the window's border (in pixels) */ + CARD16 _class, + XCBVISUALID visual, + CARD32 value_mask, + const CARD32 *value_list); +</pre> + <p> + The fact that we created the window does not mean that it will + be drawn on screen. By default, newly created windows are not + mapped on the screen (they are invisible). In order to make our + window visible, we use the function <span class="code">XCBMapWindow()</span>, whose + prototype is + </p> + <pre class="code"> +XCBVoidCookie XCBMapWindow (XCBConnection *c, XCBWINDOW window); +</pre> + <p> + Finally, here is a small program to create a window of size + 150x150 pixels, positioned at the top-left corner of the screen: + </p> + <pre class="code"> +#include <unistd.h> + +#include <X11/XCB/xcb.h> + +int +main (int argc, char *argv[]) +{ + XCBConnection *c; + XCBSCREEN *screen; + XCBDRAWABLE win; + + /* Open the connection to the X server */ + c = XCBConnect (NULL, NULL); + + /* Get the first screen */ + screen = XCBConnSetupSuccessRepRootsIter (XCBGetSetup (c)).data; + + /* Ask for our window's Id */ + win.window = XCBWINDOWNew(c); + + /* Create the window */ + XCBCreateWindow (c, /* Connection */ + 0, /* depth */ + win.window, /* window Id */ + screen->root, /* parent window */ + 0, 0, /* x, y */ + 150, 150, /* width, height */ + 10, /* border_width */ + InputOutput, /* class */ + screen->root_visual, /* visual */ + 0, NULL); /* masks, not used yet */ + + /* Map the window on the screen */ + XCBMapWindow (c, win.window); + + XCBSync (c, 0); + + pause (); + + return 1; +} +</pre> + <p> + In this code, you see one more function - <span class="code">XCBSync()</span>, not explained + yet. It is used to flush all the pending requests. More + precisely, there are 2 functions that do such things. The first + one is <span class="code">XCBFlush()</span>: + </p> + <pre class="code"> +int XCBFlush (XCBConnection *c); +</pre> + <p> + This function flushes all pending requests to the X server (much + like the <span class="code">fflush()</span> function is used to + flush standard output). The second function is + <span class="code">XCBSync()</span>: + </p> + <pre class="code"> +int XCBSync(XCBConnection *c, XCBGenericError **e); +</pre> + <p> + This functions also flushes all pending requests to the X + server, and then waits until the X server finishing processing + these requests. In a normal program, this will not be necessary + (we'll see why when we get to write a normal X program), but for + now, we put it there. + </p> + <p> + The window that is created by the above code has a default + background (gray). This one can be set to a specific color, + thanks to the two last parameters of + <span class="code">XCBCreateWindow()</span>, which are not + described yet. See the subsections + <a href="#winconf">Configuring a window</a> or + <a href="#winconf">Registering for event types using event masks</a> + for exemples on how to use these parameters. In addition, as no + events are handled, you have to make a Ctrl-C to interrupt the + program. + </p> + <p> + <b>TODO</b>: one should tell what these functions return and + about the generic error + </p> + <div class="comp"> + <div class="title"> + Comparison Xlib/XCB + </div> + <div class="xlib"> + <ul> + <li>XCreateWindow ()</li> + </ul> + </div> + <div class="xcb"> + <ul> + <li>XCBWINDOWNew ()</li> + <li>XCBCreateWindow ()</li> + </ul> + </div> + </div> + <p></p> + <li class="title"><a name="drawing">Drawing in a window</a></li> + <p> + Drawing in a window can be done using various graphical + functions (drawing pixels, lines, rectangles, etc). In order to + draw in a window, we first need to define various general + drawing parameters (what line width to use, which color to draw + with, etc). This is done using a graphical context. + </p> + <ol> + <li class="subtitle"><a name="allocgc">Allocating a Graphics Context</a></li> + <p> + As we said, a graphical context defines several attributes to + be used with the various drawing functions. For this, we + define a graphical context. We can use more than one graphical + context with a single window, in order to draw in multiple + styles (different colors, different line widths, etc). In XCB, + a Graphics Context is, as a window, characterized by an Id: + </p> + <pre class="code"> +typedef struct { + CARD32 xid; +} XCBGCONTEXT; +</pre> + <p> + We first ask the X server to attribute an Id to our graphic + context with this function: + </p> + <pre class="code"> +XCBGCONTEXT XCBGCONTEXTNew (XCBConnection *c); +</pre> + <p> + Then, we set the attributes of the graphic context with this function: + </p> + <pre class="code"> +XCBVoidCookie XCBCreateGC (XCBConnection *c, + XCBGCONTEXT cid, + XCBDRAWABLE drawable, + CARD32 value_mask, + const CARD32 *value_list); +</pre> + <p> + We give now an example on how to allocate a graphic context + that specifies that each drawing functions that use it will + draw in foreground with a black color. + </p> + <pre class="code"> +#include <X11/XCB/xcb.h> + +int +main (int argc, char *argv[]) +{ + XCBConnection *c; + XCBSCREEN *screen; + XCBDRAWABLE win; + XCBGCONTEXT black; + CARD32 mask; + CARD32 value[1]; + + /* Open the connection to the X server and get the first screen */ + c = XCBConnect (NULL, NULL); + screen = XCBConnSetupSuccessRepRootsIter (XCBGetSetup (c)).data; + + /* Create a black graphic context for drawing in the foreground */ + win.window = screen->root; + black = XCBGCONTEXTNew (c); + mask = GCForeground; + value[0] = screen->black_pixel; + XCBCreateGC (c, black, win, mask, value); + + return 1; +} +</pre> + <p> + Note should be taken regarding the role of "value_mask" and + "value_list" in the prototype of <span class="code">XCBCreateGC()</span>. Since a + graphic context has many attributes, and since we often just + want to define a few of them, we need to be able to tell the + <span class="code">XCBCreateGC()</span> which attributes we + want to set. This is what the "value_mask" parameter is + for. We then use the "value_list" parameter to specify actual + values for the attribute we defined in "value_mask". Thus, for + each constant used in "value_list", we will use the matching + constant in "value_mask". In this case, we define a graphic + context with one attribute: when drawing (a point, a line, + etc), the foreground color will be black. The rest of the + attributes of this graphic context will be set to their + default values. + </p> + <p> + See the next Subsection for more details. + </p> + <div class="comp"> + <div class="title"> + Comparison Xlib/XCB + </div> + <div class="xlib"> + <ul> + <li>XCreateGC ()</li> + </ul> + </div> + <div class="xcb"> + <ul> + <li>XCBGCONTEXTNew ()</li> + <li>XCBCreateGC ()</li> + </ul> + </div> + </div> + <p></p> + <li class="subtitle"><a name="changegc">Changing the attributes of a Graphics Context</a></li> + <p> + Once we have allocated a Graphic Context, we may need to + change its attributes (for example, changing the foreground + color we use to draw a line, or changing the attributes of the + font we use to display strings. See Subsections Drawing with a + color and Assigning a Font to a Graphic Context). This is done + by using this function: + </p> + <pre class="code"> +XCBVoidCookie XCBChangeGC (XCBConnection *c, /* The XCB Connection */ + XCBGCONTEXT gc, /* The Graphic Context */ + CARD32 value_mask, /* Components of the Graphic Context that have to be set */ + const CARD32 *value_list); /* Value as specified by value_mask */ +</pre> + <p> + The <span class="code">value_mask</span> parameter could take + these values: + </p> + <ul> + <li>GCFunction</li> + <li>GCPlaneMask</li> + <li>GCForeground</li> + <li>GCBackground</li> + <li>GCLineWidth</li> + <li>GCLineStyle</li> + <li>GCCapStyle</li> + <li>GCJoinStyle</li> + <li>GCFillStyle</li> + <li>GCFillRule</li> + <li>GCTile</li> + <li>GCStipple</li> + <li>GCTileStipXOrigin</li> + <li>GCTileStipYOrigin</li> + <li>GCFont</li> + <li>GCSubwindowMode</li> + <li>GCGraphicsExposures</li> + <li>GCClipXOrigin</li> + <li>GCClipYOrigin</li> + <li>GCClipMask</li> + <li>GCDashOffset</li> + <li>GCDashList</li> + <li>GCArcMode</li> + </ul> + <p> + It is possible to set several attributes at the same + time (for example setting the attributes of a font and the + color which will be used to display a string), by OR'ing these + values in <span class="code">value_mask</span>. Then + <span class="code">value_list</span> has to be an array which + lists the value for the respective attributes. See Subsection + Drawing with a color to have an example. + </p> + <p> + <b>TODO</b>: set the links of the 3 subsections, once they will + be written :) + </p> + <p> + <b>TODO</b>: give an example which sets several attributes. + </p> + <li class="subtitle"><a name="drawingprim">Drawing primitives: point, line, box, circle,...</a></li> + <p> + After we have created a Graphic Context, we can draw on a + window using this Graphic Context, with a set of XCB + functions, collectively called "drawing primitive". Let see + how they are used. + </p> + <p> + To draw a point, or several points, we use + </p> + <pre class="code"> +XCBVoidCookie XCBPolyPoint (XCBConnection *c, /* The connection to the X server */ + BYTE coordinate_mode, /* Coordinate mode, usually set to CoordModeOrigin */ + XCBDRAWABLE drawable, /* The drawable on which we want to draw the point(s) */ + XCBGCONTEXT gc, /* The Graphic Context we use to draw the point(s) */ + CARD32 points_len, /* The number of points */ + const XCBPOINT *points); /* An array of points */ +</pre> + <p> + The <span class="code">coordinate_mode</span> parameter + specifies the coordinate mode. Available values are + </p> + <ul> + <li><span class="code">CoordModeOrigin</span></li> + <li><span class="code">CoordModePrevious</span></li> + </ul> + <p> + The <span class="code">XCBPOINT</span> type is just a + structure with two fields (the coordinates of the point): + </p> + <pre class="code"> +typedef struct { + INT16 x; + INT16 y; +} XCBPOINT; +</pre> + <p> + You could see an example in xpoints.c. <b>TODO</b> Set the link. + </p> + <p> + To draw a line, or a polygonal line, we use + </p> + <pre class="code"> +XCBVoidCookie XCBPolyLine (XCBConnection *c, /* The connection to the X server */ + BYTE coordinate_mode, /* Coordinate mode, usually set to CoordModeOrigin */ + XCBDRAWABLE drawable, /* The drawable on which we want to draw the line(s) */ + XCBGCONTEXT gc, /* The Graphic Context we use to draw the line(s) */ + CARD32 points_len, /* The number of points in the polygonal line */ + const XCBPOINT *points); /* An array of points */ +</pre> + <p> + This function will draw the line between the first and the + second points, then the line between the second and the third + points, and so on. + </p> + <p> + To draw a segment, or several segments, we use + </p> + <pre class="code"> +XCBVoidCookie XCBPolySegment (XCBConnection *c, /* The connection to the X server */ + XCBDRAWABLE drawable, /* The drawable on which we want to draw the segment(s) */ + XCBGCONTEXT gc, /* The Graphic Context we use to draw the segment(s) */ + CARD32 segments_len, /* The number of segments */ + const XCBSEGMENT *segments); /* An array of segments */ +</pre> + <p> + The <span class="code">XCBSEGMENT</span> type is just a + structure with four fields (the coordinates of the two points + that define the segment): + </p> + <pre class="code"> +typedef struct { + INT16 x1; + INT16 y1; + INT16 x2; + INT16 y2; +} XCBSEGMENT; +</pre> + <p> + To draw a rectangle, or several rectangles, we use + </p> + <pre class="code"> +XCBVoidCookie XCBPolyRectangle (XCBConnection *c, /* The connection to the X server */ + XCBDRAWABLE drawable, /* The drawable on which we want to draw the rectangle(s) */ + XCBGCONTEXT gc, /* The Graphic Context we use to draw the rectangle(s) */ + CARD32 rectangles_len, /* The number of rectangles */ + const XCBRECTANGLE *rectangles); /* An array of rectangles */ +</pre> + <p> + The <span class="code">XCBRECTANGLE</span> type is just a + structure with four fields (the coordinates of the top-left + corner of the rectangle, and its width and height): + </p> + <pre class="code"> +typedef struct { + INT16 x; + INT16 y; + CARD16 width; + CARD16 height; +} XCBRECTANGLE; +</pre> + <p> + <b>TODO</b>: there's no coordinate_mode. Is it normal ? + </p> + <p> + To draw an elliptical arc, or several elliptical arcs, we use + </p> + <pre class="code"> +XCBVoidCookie XCBPolyArc (XCBConnection *c, /* The connection to the X server */ + XCBDRAWABLE drawable, /* The drawable on which we want to draw the arc(s) */ + XCBGCONTEXT gc, /* The Graphic Context we use to draw the arc(s) */ + CARD32 arcs_len, /* The number of arcs */ + const XCBARC *arcs); /* An array of arcs */ +</pre> + <p> + The <span class="code">XCBARC</span> type is a structure with + six fields: + </p> + <pre class="code"> +typedef struct { + INT16 x; /* Top left x coordinate of the rectangle surrounding the ellipse */ + INT16 y; /* Top left y coordinate of the rectangle surrounding the ellipse */ + CARD16 width; /* Width of the rectangle surrounding the ellipse */ + CARD16 height; /* Height of the rectangle surrounding the ellipse */ + INT16 angle1; /* Angle at which the arc begins */ + INT16 angle2; /* Angle at which the arc ends */ +} XCBARC; +</pre> + <div class="emph"> + <p> + Note: the angles are expressed in units of 1/64 of a degree, + so to have an angle of 90 degrees, starting at 0, + <span class="code">angle1 = 0</span> and + <span class="code">angle2 = 90 << 6</span>. Positive angles + indicate counterclockwise motion, while negative angles + indicate clockwise motion. + </p> + </div> + <p> + <b>TODO</b>: there's no coordinate_mode. Is it normal ? + </p> + <p> + <b>TODO</b>: I think that (x,y) should be the center of the + ellipse, and (width, height) the radius. It's more logical. + </p> + <p> + The corresponding function which fill inside the geometrical + object are listed below, without further explanation, as they + are used as the above functions. + </p> + <p> + To Fill a polygon defined by the points given as arguments , + we use + </p> + <pre class="code"> +XCBVoidCookie XCBFillPoly (XCBConnection *c, + XCBDRAWABLE drawable, + XCBGCONTEXT gc, + CARD8 shape, + CARD8 coordinate_mode, + CARD32 points_len, + const XCBPOINT *points); +</pre> + <p> + The <span class="code">shape</span> parameter specifies a + shape that helps the server to improve performance. Available + values are + </p> + <ul> + <li><span class="code">Complex</span></li> + <li><span class="code">Convex</span></li> + <li><span class="code">Nonconvex</span></li> + </ul> + <p> + To fill one or several rectangles, we use + </p> + <pre class="code"> +XCBVoidCookie XCBPolyFillRectangle (XCBConnection *c, + XCBDRAWABLE drawable, + XCBGCONTEXT gc, + CARD32 rectangles_len, + const XCBRECTANGLE *rectangles); +</pre> + <p> + To fill one or several arcs, we use + </p> + <pre class="code"> +XCBVoidCookie XCBPolyFillArc (XCBConnection *c, + XCBDRAWABLE drawable, + XCBGCONTEXT gc, + CARD32 arcs_len, + const XCBARC *arcs); +</pre> + <p></p> + <p> + To illustrate these functions, here is an example that draws + four points, a polygonal line, two segments, two rectangles + and two arcs. Remark that we use events for the first time, as + an introduction to the next section. + </p> + <pre class="code"> +#include <stdlib.h> +#include <stdio.h> + +#include <X11/XCB/xcb.h> + +/* Get the depth of the screen. Needed in order to draw something */ +int +get_depth(XCBConnection *c, + XCBSCREEN *root) +{ + XCBDRAWABLE drawable; + XCBGetGeometryRep *geom; + int depth; + + drawable.window = root->root; + geom = XCBGetGeometryReply (c, XCBGetGeometry(c, drawable), 0); + + if(!geom) + { + perror ("GetGeometry(root) failed"); + exit (0); + } + + depth = geom->depth; + free (geom); + + return depth; +} + +int +main (int argc, char *argv[]) +{ + XCBConnection *c; + XCBSCREEN *screen; + XCBDRAWABLE win; + XCBGCONTEXT foreground; + XCBGenericEvent *e; + CARD32 mask = 0; + CARD32 values[2]; + + /* geometric objects */ + XCBPOINT points[] = { + {10, 10}, + {10, 20}, + {20, 10}, + {20, 20}}; + + XCBPOINT polyline[] = { + {50, 10}, + {55, 30}, + {80, 10}, + {90, 20}}; + + XCBSEGMENT segments[] = { + {100, 10, 140, 30}, + {110, 25, 130, 60}}; + + XCBRECTANGLE rectangles[] = { + { 10, 50, 40, 20}, + { 80, 50, 10, 40}}; + + XCBARC arcs[] = { + {10, 100, 60, 40, 0, 90 << 6}, + {90, 100, 55, 40, 0, 270 << 6}}; + + /* Open the connection to the X server */ + c = XCBConnect (NULL, NULL); + + /* Get the first screen */ + screen = XCBConnSetupSuccessRepRootsIter (XCBGetSetup (c)).data; + + /* Create black (foregroung) graphic context */ + win.window = screen->root; + + foreground = XCBGCONTEXTNew (c); + mask = GCForeground | GCGraphicsExposures; + values[0] = screen->black_pixel; + values[1] = 0; + XCBCreateGC (c, foreground, win, mask, values); + + /* Ask for our window's Id */ + win.window = XCBWINDOWNew(c); + + /* Create the window */ + mask = XCBCWBackPixel | XCBCWEventMask; + values[0] = screen->white_pixel; + values[1] = ExposureMask; + XCBCreateWindow (c, /* Connection */ + 0, /* depth */ + win.window, /* window Id */ + screen->root, /* parent window */ + 0, 0, /* x, y */ + 150, 150, /* width, height */ + 10, /* border_width */ + InputOutput, /* class */ + screen->root_visual, /* visual */ + mask, values); /* masks */ + + /* Map the window on the screen */ + XCBMapWindow (c, win.window); + + + /* We flush the request */ + XCBSync (c, 0); + + while ((e = XCBWaitEvent (c))) + { + switch (e->response_type) + { + case XCBExpose: + { + /* We draw the points */ + XCBPolyPoint (c, CoordModeOrigin, win, foreground, 4, points); + + /* We draw the polygonal line */ + XCBPolyLine (c, CoordModeOrigin, win, foreground, 4, polyline); + + /* We draw the segements */ + XCBPolySegment (c, win, foreground, 2, segments); + + /* We draw the rectangles */ + XCBPolyRectangle (c, win, foreground, 2, rectangles); + + /* We draw the arcs */ + XCBPolyArc (c, win, foreground, 2, arcs); + + /* We flush the request */ + XCBSync (c, 0); + + break; + } + default: + { + /* Unknown event type, ignore it */ + break; + } + } + /* Free the Generic Event */ + free (e); + } + + return 1; +} +</pre> + </ol> + <li class="title"><a name="xevents">X Events</a></li> + <p> + In an X program, everything is driven by events. Event painting + on the screen is sometimes done as a response to an event (an + <span class="code">Expose</span> event). If part of a program's + window that was hidden, gets exposed (e.g. the window was raised + above other widows), the X server will send an "expose" event to + let the program know it should repaint that part of the + window. User input (key presses, mouse movement, etc) is also + received as a set of events. + </p> + <ol> + <li class="subtitle"><a name="register">Registering for event types using event masks</a></li> + <p> + During the creation of a window, you should give it what kind + of events it wishes to receive. Thus, you may register for + various mouse (also called pointer) events, keyboard events, + expose events, and so on. This is done for optimizing the + server-to-client connection (i.e. why send a program (that + might even be running at the other side of the globe) an event + it is not interested in ?) + </p> + <p> + In XCB, you use the "value_mask" and "value_list" data in the + <span class="code">XCBCreateWindow()</span> function to + register for events. Here is how we register for + <span class="code">Expose</span> event when creating a window: + </p> + <pre class="code"> + mask = XCBCWEventMask; + valwin[0] = ExposureMask; + win.window = XCBWINDOWNew (c); + XCBCreateWindow (c, depth, win.window, root->root, + 0, 0, 150, 150, 10, + InputOutput, root->root_visual, + mask, valwin); +</pre> + <p> + <span class="code">ExposureMask</span> is a constant defined + in the "X.h" header file. If we wanted to register to several + event types, we can logically "or" them, as follows: + </p> + <pre class="code"> + mask = XCBCWEventMask; + valwin[0] = ExposureMask | ButtonPressMask; + win.window = XCBWINDOWNew (c); + XCBCreateWindow (c, depth, win.window, root->root, + 0, 0, 150, 150, 10, + InputOutput, root->root_visual, + mask, valwin); +</pre> + <p> + This registers for <span class="code">Expose</span> events as + well as for mouse button presses insode the created + window. You should note that a mask may represent several + event sub-types. + </p> + <p> + The values that a mask could take are given + by the <span class="code">XCBCW</span> enumeration: + </p> + <pre class="code"> +typedef enum { + XCBCWBackPixmap = 1L<<0, + XCBCWBackPixel = 1L<<1, + XCBCWBorderPixmap = 1L<<2, + XCBCWBorderPixel = 1L<<3, + XCBCWBitGravity = 1L<<4, + XCBCWWinGravity = 1L<<5, + XCBCWBackingStore = 1L<<6, + XCBCWBackingPlanes = 1L<<7, + XCBCWBackingPixel = 1L<<8, + XCBCWOverrideRedirect = 1L<<9, + XCBCWSaveUnder = 1L<<10, + XCBCWEventMask = 1L<<11, + XCBCWDontPropagate = 1L<<12, + XCBCWColormap = 1L<<13, + XCBCWCursor = 1L<<14 +} XCBCW; +</pre> + <div class="emph"> + <p>Note: we must be careful when setting the values of the valwin + parameter, as they have to follow the order the + <span class="code">XCBCW</span> enumeration. Here is an + example: + </p> + </div> + <pre class="code"> + mask = XCBCWEventMask | XCBCWBackPixmap; + valwin[0] = None; /* for XCBCWBackPixmap (whose value is 1) */ + valwin[1] = ExposureMask | ButtonPressMask; /* for XCBCWEventMask, whose value (2048) */ + /* is superior to the one of XCBCWBackPixmap */ +</pre> + <p> + If the window has already been created, we can use the + <span class="code">XCBConfigureWindow()</span> function to set + the events that the window will receive. The subsection + <a href="#winconf">Configuring a window</a> shows its + prototype. As an example, here is a piece of code that + configures the window to receive the + <span class="code">Expose</span> and + <span class="code">ButtonPressMask</span> events: + </p> + <pre class="code"> +const static CARD32 values[] = { ExposureMask | ButtonPressMask }; + +/* The connection c and the window win are supposed to be defined */ + +XCBConfigureWindow (c, win, XCBCWEventMask, values); +</pre> + <div class="emph"> + <p> + Note: A common bug programmers do is adding code to handle new + event types in their program, while forgetting to add the + masks for these events in the creation of the window. Such a + programmer then should sit down for hours debugging his + program, wondering "Why doesn't my program notice that I + released the button?", only to find that they registered for + button press events but not for button release events. + </p> + </div> + <li class="subtitle"><a name="loop">Receiving events: writing the events loop</a></li> + <p> + After we have registered for the event types we are interested + in, we need to enter a loop of receiving events and handling + them. There are two ways to receive events: a blocking way and + a non blocking way: + </p> + <ul> + <li> + <span class="code">XCBWaitEvent (XCBConnection *c)</span> + is the blocking way. It waits (so blocks...) until an event is + queued in the X server. Then it retrieves it into a newly + allocated structure (it dequeues it from the queue) and returns + it. This structure has to be freed. The function returns + <span class="code">NULL</span> if an error occurs. + </li> + <br /> + <li> + <span class="code">XCBPollForEvent (XCBConnection *c, int + *error)</span> is the non blocking way. It looks at the event + queue and returns (and dequeues too) an existing event into + a newly allocated structure. This structure has to be + freed. It returns <span class="code">NULL</span> if there is + no event. If an error occurs, the parameter <span + class="code">error</span> will be filled with the error + status. + </li> + </ul> + <p> + There are various ways to write such a loop. We present two + ways to write such a loop, with the two functions above. The + first one uses <span class="code">XCBWaitEvent</span>, which + is similar to an event Xlib loop using only <span + class="code">XNextEvent</span>: + </p> + <pre class="code"> + XCBGenericEvent *e; + + while ((e = XCBWaitEvent (c))) + { + switch (e->response_type) + { + case XCBExpose: + { + /* Handle the Expose event type */ + XCBExposeEvent *ev = (XCBExposeEvent *)e; + + /* ... */ + + break; + } + case XCBButtonPress: + { + /* Handle the ButtonPress event type */ + XCBButtonPressEvent *ev = (XCBButtonPressEvent *)e; + + /* ... */ + + break; + } + default: + { + /* Unknown event type, ignore it */ + break; + } + } + /* Free the Generic Event */ + free (e); + } +</pre> + <p> + You will certainly want to use <span + class="code">XCBPollForEvent(XCBConnection *c, int + *error)</span> if, in Xlib, you use <span + class="code">XPending</span>: + </p> + <pre class="code"> + while (XPending (display)) + { + XEvent ev; + + XNextEvent(d, &ev); + + /* Manage your event */ + } +</pre> + <p> + Such a loop in XCB looks like: + </p> + <pre class="code"> + XCBGenericEvent *ev; + + while ((ev = XCBPollForEvent (conn, 0))) + { + /* Manage your event */ + } +</pre> + <p> + The events are managed in the same way as with <span + class="code">XCBWaitEvent</span>. + Obviously, we will need to give the user some way of + terminating the program. This is usually done by handling a + special "quit" event, as we will soon see. + </p> + <div class="comp"> + <div class="title"> + Comparison Xlib/XCB + </div> + <div class="xlib"> + <ul> + <li>XNextEvent ()</li> + </ul> + </div> + <div class="xcb"> + <ul> + <li>XCBWaitEvent ()</li> + </ul> + </div> + <div class="xlib"> + <ul> + <li>XPending ()</li> + <li>XNextEvent ()</li> + </ul> + </div> + <div class="xcb"> + <ul> + <li>XCBPollForEvent ()</li> + <br /> + </ul> + </div> + </div> + <p /> + <li class="subtitle"><a name="expose">Expose events</a></li> + <p> + The <span class="code">Expose</span> event is one of the most + basic (and most used) events an application may receive. It + will be sent to us in one of several cases: + <ul> + <li>A window that covered part of our window has moved + away, exposing part (or all) of our window.</li> + <li>Our window was raised above other windows.</li> + <li>Our window mapped for the first time.</li> + <li>Our window was de-iconified.</li> + </ul> + </p> + <p> + You should note the implicit assumption hidden here: the + contents of our window is lost when it is being obscured + (covered) by either windows. One may wonder why the X server + does not save this contents. The answer is: to save + memory. After all, the number of windows on a display at a + given time may be very large, and storing the contents of all + of them might require a lot of memory. Actually, there is a + way to tell the X server to store the contents of a window in + special cases, as we will see later. + </p> + <p> + When we get an <span class="code">Expose</span> event, we + should take the event's data from the members of the following + structure: + </p> + <pre class="code"> +typedef struct { + BYTE response_type; /* The type of the event, here it is XCBExpose */ + CARD8 pad0; + CARD16 sequence; + XCBWINDOW window; /* The Id of the window that receives the event (in case */ + /* our application registered for events on several windows */ + CARD16 x; /* The x coordinate of the top-left part of the window that needs to be redrawn */ + CARD16 y; /* The y coordinate of the top-left part of the window that needs to be redrawn */ + CARD16 width; /* The width of the part of the window that needs to be redrawn */ + CARD16 height; /* The height of the part of the window that needs to be redrawn */ + CARD16 count; +} XCBExposeEvent; +</pre> + <li class="subtitle"><a name="userinput">Getting user input</a></li> + <p> + User input traditionally comes from two sources: the mouse + and the keyboard. Various event types exist to notify us of + user input (a key being presses on the keyboard, a key being + released on the keyboard, the mouse moving over our window, + the mouse entering (or leaving) our window, and so on. + </p> + <ol> + <li class="subsubtitle"><a name="mousepressrelease">Mouse button press and release events</a></li> + <p> + The first event type we will deal with is a mouse + button-press (or button-release) event in our window. In + order to register to such an event type, we should add one + (or more) of the following masks when we create our window: + </p> + <ul> + <li><span class="code">ButtonPressMask</span>: notify us + of any button that was pressed in one of our windows.</li> + <li><span class="code">ButtonReleaseMask</span>: notify us + of any button that was released in one of our windows.</li> + </ul> + <p> + The structure to be checked for in our events loop is the + same for these two events, and is the following: + </p> + <pre class="code"> +typedef struct { + BYTE response_type; /* The type of the event, here it is XCBButtonPressEvent or XCBButtonReleaseEvent */ + XCBBUTTON detail; + CARD16 sequence; + XCBTIMESTAMP time; /* Time, in milliseconds the event took place in */ + XCBWINDOW root; + XCBWINDOW event; + XCBWINDOW child; + INT16 root_x; + INT16 root_y; + INT16 event_x; /* The x coordinate where the mouse has been pressed in the window */ + INT16 event_y; /* The y coordinate where the mouse has been pressed in the window */ + CARD16 state; /* A mask of the buttons (or keys) during the event */ + BOOL same_screen; +} XCBButtonPressEvent; + +typedef XCBButtonPressEvent XCBButtonReleaseEvent; +</pre> + <p> + The <span class="code">time</span> field may be used to calculate "double-click" + situations by an application (e.g. if the mouse button was + clicked two times in a duration shorter than a given amount + of time, assume this was a double click). + </p> + <p> + The <span class="code">state</span> field is a mask of the buttons held down during + the event. It is a bitwise OR of any of the following: + </p> + <ul> + <li><span class="code">Button1Mask</span></li> + <li><span class="code">Button2Mask</span></li> + <li><span class="code">Button3Mask</span></li> + <li><span class="code">Button4Mask</span></li> + <li><span class="code">Button5Mask</span></li> + <li><span class="code">ShiftMask</span></li> + <li><span class="code">LockMask</span></li> + <li><span class="code">ControlMask</span></li> + <li><span class="code">Mod1Mask</span></li> + <li><span class="code">Mod2Mask</span></li> + <li><span class="code">Mod3Mask</span></li> + <li><span class="code">Mod4Mask</span></li> + <li><span class="code">Mod5Mask</span></li> + </ul> + <p> + Their names are self explanatory, where the first 5 refer to + the mouse buttons that are being pressed, while the rest + refer to various "special keys" that are being pressed (Mod1 + is usually the 'Alt' key or the 'Meta' key). + </p> + <p> + <b>TODO:</b> Problem: it seems that the state does not + change when clicking with various buttons. + </p> + <li class="subsubtitle"><a name="mousemvnt">Mouse movement events</a></li> + <p> + Similar to mouse button press and release events, we also + can be notified of various mouse movement events. These can + be split into two families. One is of mouse pointer + movement while no buttons are pressed, and the second is a + mouse pointer motion while one (or more) of the buttons are + pressed (this is sometimes called "a mouse drag operation", + or just "dragging"). The following event masks may be added + during the creation of our window: + </p> + <ul> + <li><span class="code">PointerMotionMask</span>: events of + the pointer moving in one of the windows controlled by our + application, while no mouse button is held pressed.</li> + <li><span class="code">ButtonMotionMask</span>: Events of + the pointer moving while one or more of the mouse buttons + is held pressed.</li> + <li><span class="code">Button1MotionMask</span>: same as + <span class="code">ButtonMotionMask</span>, but only when + the 1st mouse button is held pressed.</li> + <li><span class="code">Button2MotionMask</span>, + <span class="code">Button3MotionMask</span>, + <span class="code">Button4MotionMask</span>, + <span class="code">Button5MotionMask</span>: same as + <span class="code">Button1MotionMask</span>, but + respectively for 2nd, 3rd, 4th and 5th mouse button.</li> + </ul> + <p> + The structure to be checked for in our events loop is the + same for these events, and is the following: + </p> + <pre class="code"> +typedef struct { + BYTE response_type; /* The type of the event */ + BYTE detail; + CARD16 sequence; + XCBTIMESTAMP time; /* Time, in milliseconds the event took place in */ + XCBWINDOW root; + XCBWINDOW event; + XCBWINDOW child; + INT16 root_x; + INT16 root_y; + INT16 event_x; /* The x coordinate of the mouse when the event was generated */ + INT16 event_y; /* The y coordinate of the mouse when the event was generated */ + CARD16 state; /* A mask of the buttons (or keys) during the event */ + BOOL same_screen; +} XCBMotionNotifyEvent; +</pre> + <li class="subsubtitle"><a name="mouseenter">Mouse pointer enter and leave events</a></li> + <p> + Another type of event that applications might be interested + at, is a mouse pointer entering a window the program + controls, or leaving such a window. Some programs use these + events to show the user tht the applications is now in + focus. In order to register for such an event type, we + should add one (or more) of the following masks when we + create our window: + </p> + <ul> + <li><span class="code">EnterWindowMask</span>: notify us + when the mouse pointer enters any of our controlled + windows.</li> + <li><span class="code">LeaveWindowMask</span>: notify us + when the mouse pointer leaves any of our controlled + windows.</li> + </ul> + <p> + The structure to be checked for in our events loop is the + same for these two events, and is the following: + </p> + <pre class="code"> +typedef struct { + BYTE response_type; /* The type of the event */ + BYTE detail; + CARD16 sequence; + XCBTIMESTAMP time; /* Time, in milliseconds the event took place in */ + XCBWINDOW root; + XCBWINDOW event; + XCBWINDOW child; + INT16 root_x; + INT16 root_y; + INT16 event_x; /* The x coordinate of the mouse when the event was generated */ + INT16 event_y; /* The y coordinate of the mouse when the event was generated */ + CARD16 state; /* A mask of the buttons (or keys) during the event */ + BYTE mode; /* The number of mouse button that was clicked */ + BYTE same_screen_focus; +} XCBEnterNotifyEvent; + +typedef XCBEnterNotifyEvent XCBLeaveNotifyEvent; +</pre> + <li class="subsubtitle"><a name="focus">The keyboard focus</a></li> + <p> + There may be many windows on a screen, but only a single + keyboard attached to them. How does the X server then know + which window should be sent a given keyboard input ? This is + done using the keyboard focus. Only a single window on the + screen may have the keyboard focus at a given time. There + is a XCB function that allow a program to set the keyboard + focus to a given window. The user can usually set the + keyboard ficus using the window manager (often by clicking + on the title bar of the desired window). Once our window + has the keyboard focus, every key press or key release will + cause an event to be sent to our program (if it regsitered + for these event types...). + </p> + <li class="subsubtitle"><a name="keypress">Keyboard press and release events</a></li> + <p> + If a window controlled by our program currently holds the + keyboard focus, it can receive key press and key release + events. So, we should add one (or more) of the following + masks when we create our window: + </p> + <ul> + <li><span class="code">KeyPressMask</span>: notify us when + a key was pressed while any of our controlled windows had + the keyboard focus.</li> + <li><span class="code">KeyReleaseMask</span>: notify us + when a key was released while any of our controlled + windows had the keyboard focus.</li> + </ul> + <p> + The structure to be checked for in our events loop is the + same for these two events, and is the following: + </p> + <pre class="code"> +typedef struct { + BYTE response_type; /* The type of the event */ + XCBKEYCODE detail; + CARD16 sequence; + XCBTIMESTAMP time; /* Time, in milliseconds the event took place in */ + XCBWINDOW root; + XCBWINDOW event; + XCBWINDOW child; + INT16 root_x; + INT16 root_y; + INT16 event_x; + INT16 event_y; + CARD16 state; + BOOL same_screen; +} XCBKeyPressEvent; + +typedef XCBKeyPressEvent XCBKeyReleaseEvent; +</pre> + <p> + The <span class="code">detail</span> field refer to the + physical key on the keyboard. + </p> + <p> + <b>TODO:</b> Talk about getting the ASCII code from the key code. + </p> + </ol> + <li class="subtitle"><a name="eventex">X events: a complete example</a></li> + <p> + As an example for handling events, we show a program that + creates a window, enter an events loop and check for all the + events described above, and write on the terminal the relevant + characteristics of the event. With this code, it should be + easy to add drawing operations, like those which have been + described above. + </p> + <pre class="code"> +#include <malloc.h> +#include <stdio.h> + +#include <X11/XCB/xcb.h> + +int +main (int argc, char *argv[]) +{ + XCBConnection *c; + XCBSCREEN *screen; + XCBDRAWABLE win; + XCBGenericEvent *e; + CARD32 mask = 0; + CARD32 values[2]; + + /* Open the connection to the X server */ + c = XCBConnect (NULL, NULL); + + /* Get the first screen */ + screen = XCBConnSetupSuccessRepRootsIter (XCBGetSetup (c)).data; + + /* Ask for our window's Id */ + win.window = XCBWINDOWNew(c); + + /* Create the window */ + mask = XCBCWBackPixel | XCBCWEventMask; + values[0] = screen->white_pixel; + values[1] = ExposureMask | ButtonPressMask | ButtonReleaseMask | + PointerMotionMask | EnterWindowMask | LeaveWindowMask | + KeyPressMask | KeyReleaseMask; + XCBCreateWindow (c, /* Connection */ + 0, /* depth */ + win.window, /* window Id */ + screen->root, /* parent window */ + 0, 0, /* x, y */ + 150, 150, /* width, height */ + 10, /* border_width */ + InputOutput, /* class */ + screen->root_visual, /* visual */ + mask, values); /* masks */ + + /* Map the window on the screen */ + XCBMapWindow (c, win.window); + + XCBSync (c, 0); + while ((e = XCBWaitEvent (c))) + { + switch (e->response_type) + { + case XCBExpose: + { + XCBExposeEvent *ev = (XCBExposeEvent *)e; + + printf ("Window %ld exposed. Region to be redrawn at location (%d,%d), with dimension (%d,%d)\n", + ev->window.xid, ev->x, ev->y, ev->width, ev->height); + break; + } + case XCBButtonPress: + { + XCBButtonPressEvent *ev = (XCBButtonPressEvent *)e; + int button_num = 0; + + if ((ev->state | Button1Mask) == Button1Mask) + button_num = 1; + if ((ev->state | Button2Mask) == Button2Mask) + button_num = 2; + if ((ev->state | Button3Mask) == Button3Mask) + button_num = 3; + if ((ev->state | Button4Mask) == Button4Mask) + button_num = 4; + if ((ev->state | Button5Mask) == Button5Mask) + button_num = 5; + + switch (ev->detail.id) + { + case 4: + { + printf ("Wheel Button up in window %ld, at coordinates (%d,%d)\n", + ev->event.xid, ev->event_x, ev->event_y); + break; + } + case 5: + { + printf ("Wheel Button down in window %ld, at coordinates (%d,%d)\n", + ev->event.xid, ev->event_x, ev->event_y); + break; + } + default: + printf ("Button %d pressed in window %ld, at coordinates (%d,%d)\n", + ev->detail.id, ev->event.xid, ev->event_x, ev->event_y); + } + break; + } + case XCBButtonRelease: + { + XCBButtonReleaseEvent *ev = (XCBButtonReleaseEvent *)e; + int button_num = 0; + + if ((ev->state | Button1Mask) == Button1Mask) + button_num = 1; + if ((ev->state | Button2Mask) == Button2Mask) + button_num = 2; + if ((ev->state | Button3Mask) == Button3Mask) + button_num = 3; + if ((ev->state | Button4Mask) == Button4Mask) + button_num = 4; + if ((ev->state | Button5Mask) == Button5Mask) + button_num = 5; + + printf ("Button %d released in window %ld, at coordinates (%d,%d)\n", + ev->detail.id, ev->event.xid, ev->event_x, ev->event_y); + break; + } + case XCBMotionNotify: + { + XCBMotionNotifyEvent *ev = (XCBMotionNotifyEvent *)e; + + printf ("Mouse moved in window %ld, at coordinates (%d,%d)\n", + ev->event.xid, ev->event_x, ev->event_y); + break; + } + case XCBEnterNotify: + { + XCBEnterNotifyEvent *ev = (XCBEnterNotifyEvent *)e; + + printf ("Mouse entered window %ld, at coordinates (%d,%d)\n", + ev->event.xid, ev->event_x, ev->event_y); + break; + } + case XCBLeaveNotify: + { + XCBLeaveNotifyEvent *ev = (XCBLeaveNotifyEvent *)e; + + printf ("Mouse leaved window %ld, at coordinates (%d,%d)\n", + ev->event.xid, ev->event_x, ev->event_y); + break; + } + case XCBKeyPress: + { + XCBKeyPressEvent *ev = (XCBKeyPressEvent *)e; + + printf ("Key pressed in window %ld\n", + ev->event.xid); + break; + } + case XCBKeyRelease: + { + XCBKeyReleaseEvent *ev = (XCBKeyReleaseEvent *)e; + + printf ("Key releaseed in window %ld\n", + ev->event.xid); + break; + } + default: + { + /* Unknown event type, ignore it */ + break; + } + } + /* Free the Generic Event */ + free (e); + } + + return 1; +} +</pre> + </ol> + <li class="title"><a name="font">Handling text and fonts</a></li> + <p> + Besides drawing graphics on a window, we often want to draw + text. Text strings have two major properties: the characters to + be drawn and the font with which they are drawn. In order to + draw text, we need to first request the X server to load a + font. We the assign a font to a Graphic Context, and finally, we + draw the text in a window, using the Graphic Context. + </p> + <ol> + <li class="subtitle"><a name="fontstruct">The Font structure</a></li> + <p> + In order to support flexible fonts, a font structure is + defined. You know what ? Its an Id: + </p> + <pre class="code"> +typedef struct { + CARD32 xid; +} XCBFONT; +</pre> + <p> + It is used to contain information about a font, and is passed + to several functions that handle fonts selection and text drawing. + </p> + </ol> + <li class="title"><a name="wm">Interacting with the window manager</a></li> + <p> + After we have seen how to create windows and draw on them, we + take one step back, and look at how our windows are interacting + with their environment (the full screen and the other + windows). First of all, our application needs to interact with + the window manager. The window manager is responsible to + decorating drawn windows (i.e. adding a frame, an iconify + button, a system menu, a title bar, etc), as well as handling + icons shown when windows are being iconified. It also handles + ordering of windows on the screen, and other administrative + tasks. We need to give it various hints as to how we want it to + treat our application's windows. + </p> + <ol> + <li class="subtitle"><a name="wmprop">Window properties</a></li> + <p> + Many of the parameters communicated to the window manager are + passed using data called "properties". These properties are + attached by the X server to different windows, and are stores + in a format that makes it possible to read them from different + machines that may use different architectures (remember that + an X client program may run on a remote machine). + </p> + <p> + The property and its type (a string, an integer, etc) are + Id. Their type are <span class="code">XCBATOM</span>: + </p> + <pre class="code"> +typedef struct { + CARD32 xid; +} XCBATOM; +</pre> + <p> + To change the property of a window, we use the following + function: + </p> + <pre class="code"> +XCBVoidCookie XCBChangeProperty (XCBConnection *c, /* Connection to the X server */ + CARD8 mode, /* Property mode */ + XCBWINDOW window, /* Window */ + XCBATOM property, /* Property to change */ + XCBATOM type, /* Type of the property */ + CARD8 format, /* Format of the property (8, 16, 32) */ + CARD32 data_len, /* Length of the data parameter */ + const void *data); /* Data */ +</pre> + <p> + The <span class="code">mode</span> parameter coud be one of + the following value (defined in the X.h header file): + </p> + <ul> + <li>PropModeReplace</li> + <li>PropModePrepend</li> + <li>PropModeAppend</li> + </ul> + <p></p> + <li class="subtitle"><a name="wmname">Setting the window name and icon name</a></li> + <p> + The firt thing we want to do would be to set the name for our + window. This is done using the + <span class="code">XCBChangeProperty()</span> function. This + name may be used by the window manager as the title of the + window (in the title bar), in a task list, etc. The property + atom to use to set the name of a window is + <span class="code">WM_NAME</span> (and + <span class="code">WM_ICON_NAME</span> for the iconified + window) and its type is <span class="code">STRING</span>. Here + is an example of utilization: + </p> + <pre class="code"> +#include <string.h> + +#include <X11/XCB/xcb.h> +#include <X11/XCB/xcb_atom.h> + +int +main (int argc, char *argv[]) +{ + XCBConnection *c; + XCBSCREEN *screen; + XCBDRAWABLE win; + char *title = "Hello World !"; + char *title_icon = "Hello World ! (iconified)"; + + + + /* Open the connection to the X server */ + c = XCBConnect (NULL, NULL); + + /* Get the first screen */ + screen = XCBConnSetupSuccessRepRootsIter (XCBGetSetup (c)).data; + + /* Ask for our window's Id */ + win.window = XCBWINDOWNew(c); + + /* Create the window */ + XCBCreateWindow (c, /* Connection */ + 0, /* depth */ + win.window, /* window Id */ + screen->root, /* parent window */ + 0, 0, /* x, y */ + 250, 150, /* width, height */ + 10, /* border_width */ + InputOutput, /* class */ + screen->root_visual, /* visual */ + 0, NULL); /* masks, not used */ + + /* Set the title of the window */ + XCBChangeProperty(c, PropModeReplace, win.window, + WM_NAME, STRING, 8, + strlen(title), title); + + /* Set the title of the window icon */ + XCBChangeProperty(c, PropModeReplace, win.window, + WM_ICON_NAME, STRING, 8, + strlen(title_icon), title_icon); + + /* Map the window on the screen */ + XCBMapWindow (c, win.window); + + XCBSync (c, 0); + + while (1) {} + + return 1; +} +</pre> + <div class="emph"> + <p>Note: the use of the atoms needs our program to be compiled + and linked against xcb_atom, so that we have to use + </p> + </div> + <pre class="text"> +gcc prog.c -o prog `pkg-config --cflags --libs xcb_atom` +</pre> + <div class="emph"> + <p> + for the program to compile fine. + </p> + </div> + </ol> + <li class="title"><a name="winop">Simple window operations</a></li> + <p> + One more thing we can do to our window is manipulate them on the + screen (resize them, move them, raise or lower them, iconify + them, and so on). Some window operations functions are supplied + by XCB for this purpose. + </p> + <ol> + <li class="subtitle"><a name="winmap">Mapping and un-mapping a window</a></li> + <p> + The first pair of operations we can apply on a window is + mapping it, or un-mapping it. Mapping a window causes the + window to appear on the screen, as we have seen in our simple + window program example. Un-mapping it causes it to be removed + from the screen (although the window as a logical entity still + exists). This gives the effect of making a window hidden + (unmapped) and shown again (mapped). For example, if we have a + dialog box window in our program, instead of creating it every + time the user asks to open it, we can create the window once, + in an un-mapped mode, and when the user asks to open it, we + simply map the window on the screen. When the user clicked the + 'OK' or 'Cancel' button, we simply un-map the window. This is + much faster than creating and destroying the window, however, + the cost is wasted resources, both on the client side, and on + the X server side. + </p> + <p> + To map a window, you use the following function: + </p> + <pre class="code"> +XCBVoidCookie XCBMapWindow(XCBConnection *c, XCBWINDOW window); +</pre> + <p> + To have a simple example, see the <a href="#helloworld">example</a> + above. The mapping operation will cause an + <span class="code">Expose</span> event to be sent to our + application, unless the window is completely covered by other + windows. + </p> + <p> + Un-mapping a window is also simple. You use the function + </p> + <pre class="code"> +XCBVoidCookie XCBUnmapWindow(XCBConnection *c, XCBWINDOW window); +</pre> + <p> + The utilization of this function is the same as + <span class="code">XCBMapWindow()</span>. + </p> + <li class="subtitle"><a name="winconf">Configuring a window</a></li> + <p> + As we have seen when we have created our first window, in the + X Events subsection, we can set some attributes to the window + (that is, the position, the size, the events the window will + receive, etc). If we want to modify them, but the window is + already created, we can change them by using hte following + function: + </p> + <pre class="code"> +XCBVoidCookie XCBConfigureWindow (XCBConnection *c, /* The connection to the X server*/ + XCBWINDOW window, /* The window to configure */ + CARD16 value_mask, /* The mask */ + const CARD32 *value_list); /* The values to set */ +</pre> + <p> + We set the <span class="code">value_mask</span> to one or + several mask values that are in the X.h header: + <ul> + <li><span class="code">CWX</span>: new x coordinate of the window's top left corner</li> + <li><span class="code">CWY</span>: new y coordinate of the window's top left corner</li> + <li><span class="code">CWWidth</span>: new width of the window</li> + <li><span class="code">CWHeight</span>: new height of the window</li> + <li><span class="code">CWBorderWidth</span>: new width of the border of the window</li> + <li><span class="code">CWSibling</span></li> + <li><span class="code">CWStackMode</span>: the new stacking order</li> + </ul> + </p> + <p> + We then give to <span class="code">value_mask</span> the new + value. We now describe how to use + <span class="code">XCBConfigureWindow</span> in some useful + situations. + </p> + <li class="subtitle"><a name="winmove">Moving a window around the screen</a></li> + <p> + An operation we might want to do with windows is to move them + to a different location. This can be done like this: + </p> + <pre class="code"> +const static CARD32 values[] = { 10, 20 }; + +/* The connection c and the window win are supposed to be defined */ + +/* Move the window to coordinates x = 10 and y = 20 */ +XCBConfigureWindow (c, win, CWX | CWY, values); +</pre> + <p> + Note that when the window is moved, it might get partially + exposed or partially hidden by other windows, and thus we + might get <span class="code">Expose</span> events due to this + operation. + </p> + <li class="subtitle"><a name="winsize">Resizing a window</a></li> + <p> + Yet another operation we can do is to change the size of a + window. This is done using the following code: + </p> + <pre class="code"> +const static CARD32 values[] = { 200, 300 }; + +/* The connection c and the window win are supposed to be defined */ + +/* Resize the window to width = 10 and height = 20 */ +XCBConfigureWindow (c, win, CWWidth | CWHeight, values); +</pre> + <p> + We can also combine the move and resize operations using one + single call to <span class="code">XCBConfigureWindow</span>: + </p> + <pre class="code"> +const static CARD32 values[] = { 10, 20, 200, 300 }; + +/* The connection c and the window win are supposed to be defined */ + +/* Move the window to coordinates x = 10 and y = 20 */ +/* and resize the window to width = 10 and height = 20 */ +XCBConfigureWindow (c, win, CWX | CWY | CWWidth | CWHeight, values); +</pre> + <li class="subtitle"><a name="winstack">Changing windows stacking order: raise and lower</a></li> + <p> + Until now, we changed properties of a single window. We'll see + that there are properties that relate to the window and other + windows. One of hem is the stacking order. That is, the order + in which the windows are layered on top of each other. The + front-most window is said to be on the top of the stack, while + the back-most window is at the bottom of the stack. Here is + how to manipulate our windows stack order: + </p> + <pre class="code"> +const static CARD32 values[] = { Above }; + +/* The connection c and the window win are supposed to be defined */ + +/* Move the window on the top of the stack */ +XCBConfigureWindow (c, win, CWStackMode, values); +</pre> + <pre class="code"> +const static CARD32 values[] = { Below }; + +/* The connection c and the window win are supposed to be defined */ + +/* Move the window on the bottom of the stack */ +XCBConfigureWindow (c, win, CWStackMode, values); +</pre> + <li class="subtitle"><a name="wingetinfo">Getting information about a window</a></li> + <p> + Just like we can set various attributes of our windows, we can + also ask the X server supply the current values of these + attributes. For example, we can chewk where a window is + located on the screen, what is its current size, wheter it is + mapped or not, etc. The structure that contains some of this + information is + </p> + <pre class="code"> +typedef struct { + BYTE response_type; + CARD8 depth; /* depth of the window */ + CARD16 sequence; + CARD32 length; + XCBWINDOW root; /* Id of the root window *> + INT16 x; /* X coordinate of the window's location */ + INT16 y; /* Y coordinate of the window's location */ + CARD16 width; /* Width of the window */ + CARD16 height; /* Height of the window */ + CARD16 border_width; /* Width of the window's border */ +} XCBGetGeometryRep; +</pre> + <p> + XCB fill this structure with two functions: + </p> + <pre class="code"> +XCBGetGeometryCookie XCBGetGeometry (XCBConnection *c, + XCBDRAWABLE drawable); +XCBGetGeometryRep *XCBGetGeometryReply (XCBConnection *c, + XCBGetGeometryCookie cookie, + XCBGenericError **e); +</pre> + <p> + You use them as follows: + </p> + <pre class="code"> + XCBConnection *c; + XCBDRAWABLE win; + XCBGetGeometryRep *geom; + + /* You initialize c and win */ + + geom = XCBGetGeometryReply (c, XCBGetGeometry (c, win), 0); + + /* Do something with the fields of geom */ + + free (geom); +</pre> + <p> + Remark that you have to free the structure, as + <span class="code">XCBGetGeometryReply</span> allocates a + newly one. + </p> + <p> + One problem is that the returned location of the window is + relative to its parent window. This makes these coordinates + rather useless for any window manipulation functions, like + moving it on the screen. In order to overcome this problem, we + need to take a two-step operation. First, we find out the Id + of the parent window of our window. We then translate the + above relative coordinates to the screen coordinates. + </p> + <p> + To get the Id of the parent window, we need this structure: + </p> + <pre class="code"> +typedef struct { + BYTE response_type; + CARD8 pad0; + CARD16 sequence; + CARD32 length; + XCBWINDOW root; + XCBWINDOW parent; /* Id of the parent window */ + CARD16 children_len; + CARD8 pad1[14]; +} XCBQueryTreeRep; +</pre> + <p> + To fill this structure, we use these two functions: + </p> + <pre class="code"> +XCBQueryTreeCookie XCBQueryTree (XCBConnection *c, + XCBWINDOW window); +XCBQueryTreeRep *XCBQueryTreeReply (XCBConnection *c, + XCBQueryTreeCookie cookie, + XCBGenericError **e); +</pre> + <p> + The translated coordinates will be found in this structure: + </p> + <pre class="code"> +typedef struct { + BYTE response_type; + BOOL same_screen; + CARD16 sequence; + CARD32 length; + XCBWINDOW child; + CARD16 dst_x; /* Translated x coordinate */ + CARD16 dst_y; /* Translated y coordinate */ +} XCBTranslateCoordinatesRep; +</pre> + <p> + As usual, we need two functions to fill this structure: + </p> + <pre class="code"> +XCBTranslateCoordinatesCookie XCBTranslateCoordinates (XCBConnection *c, + XCBWINDOW src_window, + XCBWINDOW dst_window, + INT16 src_x, + INT16 src_y); +XCBTranslateCoordinatesRep *XCBTranslateCoordinatesReply (XCBConnection *c, + XCBTranslateCoordinatesCookie cookie, + XCBGenericError **e); +</pre> + <p> + We use them as follows: + </p> + <pre class="code"> + XCBConnection *c; + XCBDRAWABLE win; + XCBGetGeometryRep *geom; + XCBQueryTreeRep *tree; + XCBTranslateCoordinatesRep *trans; + + /* You initialize c and win */ + + geom = XCBGetGeometryReply (c, XCBGetGeometry (c, win), 0); + if (!geom) + return 0; + + tree = XCBQueryTreeReply (c, XCBQueryTree (c, win), 0); + if (!tree) + return 0; + + trans = XCBTranslateCoordinatesReply (c, + XCBTranslateCoordinates (c, + win, + tree->parent, + geom->x, geom->y), + 0); + if (!trans) + return 0; + + /* the translated coordinates are in trans->dst_x and trans->dst_y */ + + free (trans); + free (tree); + free (geom); +</pre> + <p> + Of course, as for <span class="code">geom</span>, + <span class="code">tree</span> and + <span class="code">trans</span> have to be freed. + </p> + <p> + The work is a bit hard, but XCB is a very low-level library. + </p> + <p> + <b>TODO:</b> the utilization of these functions should be a + prog, which displays the coordinates of the window. + </p> + <p> + There is another structure that gives informations about our window: + </p> + <pre class="code"> +typedef struct { + BYTE response_type; + CARD8 backing_store; + CARD16 sequence; + CARD32 length; + XCBVISUALID visual; /* Visual of the window */ + CARD16 _class; + CARD8 bit_gravity; + CARD8 win_gravity; + CARD32 backing_planes; + CARD32 backing_pixel; + BOOL save_under; + BOOL map_is_installed; + CARD8 map_state; /* Map state of the window */ + BOOL override_redirect; + XCBCOLORMAP colormap; /* Colormap of the window */ + CARD32 all_event_masks; + CARD32 your_event_mask; + CARD16 do_not_propagate_mask; +} XCBGetWindowAttributesRep; +</pre> + <p> + XCB supplies these two functions to fill it: + </p> + <pre class="code"> +XCBGetWindowAttributesCookie XCBGetWindowAttributes (XCBConnection *c, + XCBWINDOW window); +XCBGetWindowAttributesRep *XCBGetWindowAttributesReply (XCBConnection *c, + XCBGetWindowAttributesCookie cookie, + XCBGenericError **e); +</pre> + <p> + You use them as follows: + </p> + <pre class="code"> + XCBConnection *c; + XCBDRAWABLE win; + XCBGetWindowAttributesRep *attr; + + /* You initialize c and win */ + + attr = XCBGetWindowAttributesReply (c, XCBGetWindowAttributes (c, win), 0); + + if (!attr) + return 0; + + /* Do something with the fields of attr */ + + free (attr); +</pre> + <p> + As for <span class="code">geom</span>, + <span class="code">attr</span> has to be freed. + </p> + </ol> + <li class="title"><a name="usecolor">Using colors to paint the rainbow</a></li> + <p> + Up until now, all our painting operation were done using black + and white. We will (finally) see now how to draw using colors. + </p> + <ol> + <li class="subtitle"><a name="colormap">Color maps</a></li> + <p> + In the beginning, there were not enough colors. Screen + controllers could only support a limited number of colors + simultaneously (initially 2, then 4, 16 and 256). Because of + this, an application could not just ask to draw in a "light + purple-red" color, and expect that color to be available. Each + application allocated the colors it needed, and when all the + color entries (4, 16, 256 colors) were in use, the next color + allocation would fail. + </p> + <p> + Thus, the notion of "a color map" was introduced. A color map + is a table whose size is the same as the number of + simultaneous colors a given screen controller. Each entry + contained the RGB (Red, Green and Blue) values of a different + color (all colors can be drawn using some combination of red, + green and blue). When an application wants to draw on the + screen, it does not specify which color to use. Rather, it + specifies which color entry of some color map to be used + during this drawing. Change the value in this color map entry + and the drawing will use a different color. + </p> + <p> + In order to be able to draw using colors that got something to + do with what the programmer intended, color map allocation + functions are supplied. You could ask to allocate entry for a + color with a set of RGB values. If one already existed, you + would get its index in the table. If none existed, and the + table was not full, a new cell would be allocated to contain + the given RGB values, and its index returned. If the table was + full, the procedure would fail. You could then ask to get a + color map entry with a color that is closest to the one you + were asking for. This would mean that the actual drawing on + the screen would be done using colors similar to what you + wanted, but not the same. + </p> + <p> + On today's more modern screens where one runs an X server with + support for 16 million colors, this limitation looks a little + silly, but remember that there are still older computers with + older graphics cards out there. Using color map, support for + these screen becomes transparent to you. On a display + supporting 16 million colors, any color entry allocation + request would succeed. On a display supporting a limited + number of colors, some color allocation requests would return + similar colors. It won't look as good, but your application + would still work. + </p> + <li class="subtitle"><a name="colormapalloc">Allocating and freeing Color Maps</a></li> + <p> + When you draw using XCB, you can choose to use the standard + color map of the screen your window is displayed on, or you + can allocate a new color map and apply it to a window. In the + latter case, each time the mouse moves onto your window, the + screen color map will be replaced by your window's color map, + and you'll see all the other windows on screen change their + colors into something quite bizzare. In fact, this is the + effect you get with X applications that use the "-install" + command line option. + </p> + <p> + In XCB, a color map is (as often in X) an Id: + </p> + <pre class="code"> +typedef struct { + CARD32 xid; +} XCBCOLORMAP; +</pre> + <p> + In order to access the screen's default color map, you just + have to retrieve the <span class="code">default_colormap</span> + field of the <span class="code">XCBSCREEN</span> structure + (see Section + <a href="#screen">Checking basic information about a connection</a>): + </p> + <pre class="code"> +#include <stdio.h> + +#include <X11/XCB/xcb.h> + +int +main (int argc, char *argv[]) +{ + XCBConnection *c; + XCBSCREEN *screen; + XCBCOLORMAP colormap; + + /* Open the connection to the X server and get the first screen */ + c = XCBConnect (NULL, NULL); + screen = XCBConnSetupSuccessRepRootsIter (XCBGetSetup (c)).data; + + colormap = screen->default_colormap; + + return 1; +} +</pre> + <p> + This will return the color map used by default on the first + screen (again, remember that an X server may support several + different screens, each of which might have its own resources). + </p> + <p> + The other option, that of allocating a new colormap, works as + follows. We first ask the X server to give an Id to our color + map, with this function: + </p> + <pre class="code"> +XCBCOLORMAP XCBCOLORMAPNew (XCBConnection *c); +</pre> + <p> + Then, we create the color map with + </p> + <pre class="code"> +XCBVoidCookie XCBCreateColormap (XCBConnection *c, /* Pointer to the XCBConnection structure */ + BYTE alloc, /* Colormap entries to be allocated (AllocNone or AllocAll) */ + XCBCOLORMAP mid, /* Id of the color map */ + XCBWINDOW window, /* Window on whose screen the colormap will be created */ + XCBVISUALID visual); /* Id of the visual supported by the screen */ +</pre> + <p> + Here is an example of creation of a new color map: + </p> + <pre class="code"> +#include <X11/XCB/xcb.h> + +int +main (int argc, char *argv[]) +{ + XCBConnection *c; + XCBSCREEN *screen; + XCBWINDOW win; + XCBCOLORMAP cmap + + /* Open the connection to the X server and get the first screen */ + c = XCBConnect (NULL, NULL); + screen = XCBConnSetupSuccessRepRootsIter (XCBGetSetup (c)).data; + + /* We create the window win here*/ + + cmap = XCBCOLORMAPNew (c); + XCBCreateColormap (c, AllocNone, cmap, win, screen->root_visual); + + return 1; +} +</pre> + <p> + Note that the window parameter is only used to allow the X + server to create the color map for the given screen. We can + then use this color map for any window drawn on the same screen. + </p> + <p> + To free a color map, it suffices to use this function: + </p> + <pre class="code"> +XCBVoidCookie XCBFreeColormap (XCBConnection *c, /* The connection */ + XCBCOLORMAP cmap); /* The color map */ +</pre> + <div class="comp"> + <div class="title"> + Comparison Xlib/XCB + </div> + <div class="xlib"> + <ul> + <li>XCreateColormap ()</li> + </ul> + </div> + <div class="xcb"> + <ul> + <li>XCBCOLORMAPNew ()</li> + <li>XCBCreateColormap ()</li> + </ul> + </div> + <div class="xlib"> + <ul> + <li>XFreeColormap ()</li> + </ul> + </div> + <div class="xcb"> + <ul> + <li>XCBFreeColormap ()</li> + </ul> + </div> + </div> + <p></p> + <li class="subtitle"><a name="alloccolor">Allocating and freeing a color entry</a></li> + <p> + Once we got access to some color map, we can strat allocating + colors. The informations related to a color are stored in the + following structure: + </p> + <pre class="code"> +typedef struct { + BYTE response_type; + CARD8 pad0; + CARD16 sequence; + CARD32 length; + CARD16 red; /* The red component */ + CARD16 green; /* The green component */ + CARD16 blue; /* The blue component */ + CARD8 pad1[2]; + CARD32 pixel; /* The entry in the color map, supplied by the X server */ +} XCBAllocColorRep; +</pre> + <p> + XCB supplies these two functions to fill it: + </p> + <pre class="code"> +XCBAllocColorCookie XCBAllocColor (XCBConnection *c, + XCBCOLORMAP cmap, + CARD16 red, + CARD16 green, + CARD16 blue); +XCBAllocColorRep *XCBAllocColorReply (XCBConnection *c, + XCBAllocColorCookie cookie, + XCBGenericError **e); +</pre> + <p> + The fuction <span class="code">XCBAllocColor()</span> takes the + 3 RGB components as parameters (red, green and blue). Here is an + example of using these functions: + </p> + <pre class="code"> +#include <malloc.h> + +#include <X11/XCB/xcb.h> + +int +main (int argc, char *argv[]) +{ + XCBConnection *c; + XCBSCREEN *screen; + XCBWINDOW win; + XCBCOLORMAP cmap; + XCBAllocColorRep *rep; + + /* Open the connection to the X server and get the first screen */ + c = XCBConnect (NULL, NULL); + screen = XCBConnSetupSuccessRepRootsIter (XCBGetSetup (c)).data; + + /* We create the window win here*/ + + cmap = XCBCOLORMAPNew (c); + XCBCreateColormap (c, AllocNone, cmap, win, screen->root_visual); + + rep = XCBAllocColorReply (c, XCBAllocColor (c, cmap, 65535, 0, 0), 0); + + if (!rep) + return 0; + + /* Do something with r->pixel or the components */ + + free (rep); + + return 1; +} +</pre> + <p> + As <span class="code">XCBAllocColorReply()</span> allocates + memory, you have to free <span class="code">rep</span>. + </p> + <p> + <b>TODO</b>: Talk about freeing colors. + </p> + </ol> + <li class="title"><a name="pixmaps">X Bitmaps and Pixmaps</a></li> + <p> + One thing many so-called "Multi-Media" applications need to od, + is display images. In the X world, this is done using bitmaps + and pixmaps. We have already seen some usage of them when + setting an icon for our application. Lets study them further, + and see how to draw these images inside a window, along side the + simple graphics and text we have seen so far. + </p> + <p> + One thing to note before delving further, is that XCB (nor Xlib) + supplies no means of manipulating popular image formats, such as + gif, png, jpeg or tiff. It is up to the programmer (or to higher + level graphics libraries) to translate these image formats into + formats that the X server is familiar with (x bitmaps and x + pixmaps). + </p> + <ol> + <li class="subtitle"><a name="pixmapswhat">What is a X Bitmap ? An X Pixmap ?</a></li> + <p> + An X bitmap is a two-color image stored in a format specific + to the X window system. When stored in a file, the bitmap data + looks like a C source file. It contains variables defining the + width and the height of the bitmap, an array containing the + bit values of the bitmap (the size of the array is + weight*height), and an optional hot-spot location (that will + be explained later, when discussing mouse cursors). + </p> + <p> + An X pixmap is a format used to stored images in the memory of + an X server. This format can store both black and white images + (such as x bitmaps) as well as color images. It is the only + image format supported by the X protocol, and any image to be + drawn on screen, should be first translated into this format. + </p> + <p> + In actuality, an X pixmap can be thought of as a window that + does not appear on the screen. Many graphics operations that + work on windows, will also work on pixmaps. Indeed, the type + of X pixmap in XCB is an Id like a window: + </p> + <pre class="code"> +typedef struct { + CARD32 xid; +} XCBPIXMAP; +</pre> + <p> + In order to make the difference between a window and a pixmap, + XCB introduces a drawable type, which is a <b>union</b> + </p> + <pre class="code"> +typedef union { + XCBWINDOW window; + XCBPIXMAP pixmap; +} XCBDRAWABLE; +</pre> + <p> + in order to avoid confusion between a window and a pixmap.The + operations that will work indifferently on a window or a pixmap + will require a <span class="code">XCBDRAWABLE</span> + </p> + <div class="emph"> + <p> + Remark: In Xlib, there is no specific difference between a + <span class="code">Drawable</span>, a + <span class="code">Pixmap</span> or a + <span class="code">Window</span>: all are 32 bit long + integer. + </p> + </div> + <li class="subtitle"><a name="pixmapscreate">Creating a pixmap</a></li> + <p> + Sometimes we want to create an un-initialized pixmap, so we + can later draw into it. This is useful for image drawing + programs (creating a new empty canvas will cause the creation + of a new pixmap on which the drawing can be stored). It is + also useful when reading various image formats: we load the + image data into memory, create a pixmap on the server, and + then draw the decoded image data onto that pixmap. + </p> + <p> + To create a new pixmap, we first ask the X server to give an + Id to our pixmap, with this function: + </p> + <pre class="code"> +XCBPIXMAP XCBPIXMAPNew (XCBConnection *c); +</pre> + <p> + Then, XCB supplies the following function to create new pixmaps: + </p> + <pre class="code"> +XCBVoidCookie XCBCreatePixmap (XCBConnection *c, /* Pointer to the XCBConnection structure */ + CARD8 depth, /* Depth of the screen */ + XCBPIXMAP pid, /* Id of the pixmap */ + XCBDRAWABLE drawable, + CARD16 width, /* Width of the window (in pixels) */ + CARD16 height); /* Height of the window (in pixels) */ +</pre> + <p> + <b>TODO</b>: Explain the drawable parameter, and give an + example (like xpoints.c) + </p> + <li class="subtitle"><a name="pixmapsdraw"></a>Drawing a pixmap in a window</li> + <p> + Once we got a handle to a pixmap, we can draw it on some + window, using the following function: + </p> + <pre class="code"> +XCBVoidCookie XCBCopyArea (XCBConnection *c, /* Pointer to the XCBConnection structure */ + XCBDRAWABLE src_drawable, /* The Drawable we want to paste */ + XCBDRAWABLE dst_drawable, /* The Drawable on which we copy the previous Drawable */ + XCBGCONTEXT gc, /* A Graphic Context */ + INT16 src_x, /* Top left x coordinate of the region we want to copy */ + INT16 src_y, /* Top left y coordinate of the region we want to copy */ + INT16 dst_x, /* Top left x coordinate of the region where we want to copy */ + INT16 dst_y, /* Top left y coordinate of the region where we want to copy */ + CARD16 width, /* Width of the region we want to copy */ + CARD16 height); /* Height of the region we want to copy */ +</pre> + <p> + As you can see, we could copy the whole pixmap, as well as + only a given rectangle of the pixmap. This is useful to + optimize the drawing speed: we could copy only what we have + modified in the pixmap. + </p> + <p> + <b>One important note should be made</b>: it is possible to + create pixmaps with different depths on the same screen. When + we perform copy operations (a pixmaap onto a window, etc), we + should make sure that both source and target have the same + depth. If they have a different depth, the operation would + fail. The exception to this is if we copy a specific bit plane + of the source pixmap using the + <span class="code">XCBCopyPlane</span> function. In such an + event, we can copy a specific plain to the target window (in + actuality, setting a specific bit in the color of each pixel + copied). This can be used to generate strange graphic effects + in widow, but beyond the scope of this tutorial. + </p> + <li class="subtitle"><a name="pixmapsfree"></a>Freeing a pixmap</li> + <p> + Finally, when we are done using a given pixmap, we should free + it, in order to free resources of the X server. This is done + using this function: + </p> + <pre class="code"> +XCBVoidCookie XCBFreePixmap (XCBConnection *c, /* Pointer to the XCBConnection structure */ + XCBPIXMAP pixmap); /* A given pixmap */ +</pre> + <p> + Of course, after having freed it, we must not try accessing + the pixmap again. + </p> + <p> + <b>TODO</b>: Give an example, or a link to xpoints.c + </p> + </ol> + <li class="title"><a name="translation">Translation of basic Xlib functions and macros</a></li> + <p> + The problem when you want to port an Xlib program to XCB is that + you don't know if the Xlib function that you want to "translate" + is a X Window one or an Xlib macro. In that section, we describe + a way to translate the usual functions or macros that Xlib + provides. It's usually just a member of a structure. + </p> + <ol> + <li class="subtitle"><a name="displaystructure">Members of the Display structure</a></li> + In this section, we look at how to translate the macros that + returns some members of the <span class="code">Display</span> + structure. They are obtain by using a function that requires a + <span class="code">XCBConnection *</span> or a member of the + <span class="code">XCBConnSetupSuccessRep</span> structure + (via the function <span class="code">XCBGetSetup</span>), or + a function that requires that structure. + <ol> + <li class="subtitle"><a name="ConnectionNumber">ConnectionNumber</a></li> + <p> + This number is the file descriptor that connects the client + to the server. You just have to use that function: + </p> + <pre class="code"> +int XCBGetFileDescriptor(XCBConnection *c); +</pre> + <li class="subtitle"><a name="DefaultScreen"></a>DefaultScreen</li> + <p> + That number is not stored by XCB. It is returned in the + second parameter of the function <span class="code"><a href="#openconn">XCBConnect</a></span>. + Hence, you have to store it yourself if you want to use + it. Then, to get the <span class="code">XCBSCREEN</span> + structure, you have to iterate on the screens. + The equivalent function of the Xlib's + <span class="code">ScreenOfDisplay</span> function can be + found <a href="#ScreenOfDisplay">below</a>. OK, here is the + small piece of code to get that number: + </p> + <pre class="code"> +XCBConnection *c; +int screen_default_nbr; + +/* you pass the name of the display you want to XCBConnect */ + +c = XCBConnect (display_name, &screen_default_nbr); + +/* screen_default_nbr contains now the number of the default screen */ +</pre> + <li class="subtitle"><a name="QLength"></a>QLength</li> + <p> + Not documented yet. + </p> + <li class="subtitle"><a name="ScreenCount"></a>ScreenCount</li> + <p> + You get the count of screens with the functions + <span class="code">XCBGetSetup</span> + and + <span class="code">XCBConnSetupSuccessRepRootsIter</span> + (if you need to iterate): + </p> + <pre class="code"> +XCBConnection *c; +int screen_count; + +/* you init the connection */ + +screen_count = XCBConnSetupSuccessRepRootsIter (XCBGetSetup (c)).rem; + +/* screen_count contains now the count of screens */ +</pre> + <p> + If you don't want to iterate over the screens, a better way + to get that number is to use + <span class="code">XCBConnSetupSuccessRepRootsLength</span>: + </p> + <pre class="code"> +XCBConnection *c; +int screen_count; + +/* you init the connection */ + +screen_count = XCBConnSetupSuccessRepRootsLength (XCBGetSetup (c)); + +/* screen_count contains now the count of screens */ +</pre> + <li class="subtitle"><a name="ServerVendor"></a>ServerVendor</li> + <p> + You get the name of the vendor of the server hardware with + the functions <span class="code">XCBGetSetup</span> + and + <span + class="code">XCBConnSetupSuccessRepVendor</span>. Beware + that, unlike Xlib, the string returned by XCB is not + necessarily null-terminaled: + </p> + <pre class="code"> +XCBConnection *c; +char *vendor = NULL; +int length; + +/* you init the connection */ +length = XCBConnSetupSuccessRepVendorLength (XCBGetSetup (c)); +vendor = (char *)malloc (length + 1); +if (vendor) +memcpy (vendor, XCBConnSetupSuccessRepVendor (XCBGetSetup (c)), length); +vendor[length] = '\0'; + +/* vendor contains now the name of the vendor. Must be freed when not used anymore */ +</pre> + <li class="subtitle"><a name="ProtocolVersion"></a>ProtocolVersion</li> + <p> + You get the major version of the protocol in the + <span class="code">XCBConnSetupSuccessRep</span> + structure, with the function <span class="code">XCBGetSetup</span>: + </p> + <pre class="code"> +XCBConnection *c; +CARD16 protocol_major_version; + +/* you init the connection */ + +protocol_major_version = XCBGetSetup (c)->protocol_major_version; + +/* protocol_major_version contains now the major version of the protocol */ +</pre> + <li class="subtitle"><a name="ProtocolRevision"></a>ProtocolRevision</li> + <p> + You get the minor version of the protocol in the + <span class="code">XCBConnSetupSuccessRep</span> + structure, with the function <span class="code">XCBGetSetup</span>: + </p> + <pre class="code"> +XCBConnection *c; +CARD16 protocol_minor_version; + +/* you init the connection */ + +protocol_minor_version = XCBGetSetup (c)->protocol_minor_version; + +/* protocol_minor_version contains now the minor version of the protocol */ +</pre> + <li class="subtitle"><a name="VendorRelease"></a>VendorRelease</li> + <p> + You get the number of the release of the server hardware in the + <span class="code">XCBConnSetupSuccessRep</span> + structure, with the function <span class="code">XCBGetSetup</span>: + </p> + <pre class="code"> +XCBConnection *c; +CARD32 release_number; + +/* you init the connection */ + +release_number = XCBGetSetup (c)->release_number; + +/* release_number contains now the number of the release of the server hardware */ +</pre> + <li class="subtitle"><a name="DisplayString"></a>DisplayString</li> + <p> + The name of the display is not stored in XCB. You have to + store it by yourself. + </p> + <li class="subtitle"><a name="BitmapUnit"></a>BitmapUnit</li> + <p> + You get the bitmap scanline unit in the + <span class="code">XCBConnSetupSuccessRep</span> + structure, with the function <span class="code">XCBGetSetup</span>: + </p> + <pre class="code"> +XCBConnection *c; +CARD8 bitmap_format_scanline_unit; + +/* you init the connection */ + +bitmap_format_scanline_unit = XCBGetSetup (c)->bitmap_format_scanline_unit; + +/* bitmap_format_scanline_unit contains now the bitmap scanline unit */ +</pre> + <li class="subtitle"><a name="BitmapBitOrder"></a>BitmapBitOrder</li> + <p> + You get the bitmap bit order in the + <span class="code">XCBConnSetupSuccessRep</span> + structure, with the function <span class="code">XCBGetSetup</span>: + </p> + <pre class="code"> +XCBConnection *c; +CARD8 bitmap_format_bit_order; + +/* you init the connection */ + +bitmap_format_bit_order = XCBGetSetup (c)->bitmap_format_bit_order; + +/* bitmap_format_bit_order contains now the bitmap bit order */ +</pre> + <li class="subtitle"><a name="BitmapPad"></a>BitmapPad</li> + <p> + You get the bitmap scanline pad in the + <span class="code">XCBConnSetupSuccessRep</span> + structure, with the function <span class="code">XCBGetSetup</span>: + </p> + <pre class="code"> +XCBConnection *c; +CARD8 bitmap_format_scanline_pad; + +/* you init the connection */ + +bitmap_format_scanline_pad = XCBGetSetup (c)->bitmap_format_scanline_pad; + +/* bitmap_format_scanline_pad contains now the bitmap scanline pad */ +</pre> + <li class="subtitle"><a name="ImageByteOrder"></a>ImageByteOrder</li> + <p> + You get the image byte order in the + <span class="code">XCBConnSetupSuccessRep</span> + structure, with the function <span class="code">XCBGetSetup</span>: + </p> + <pre class="code"> +XCBConnection *c; +CARD8 image_byte_order; + +/* you init the connection */ + +image_byte_order = XCBGetSetup (c)->image_byte_order; + +/* image_byte_order contains now the image byte order */ +</pre> + </ol> + <li class="subtitle"><a name="screenofdisplay">ScreenOfDisplay related functions</a></li> + <p> + in Xlib, <span class="code">ScreenOfDisplay</span> returns a + <span class="code">Screen</span> structure that contains + several characteristics of your screen. XCB has a similar + structure (<span class="code">XCBSCREEN</span>), + but the way to obtain it is a bit different. With + Xlib, you just provide the number of the screen and you grab it + from an array. With XCB, you iterate over all the screens to + obtain the one you want. The complexity of this operation is + O(n). So the best is to store this structure if you often use + it. See <a href="#ScreenOfDisplay">ScreenOfDisplay</a> just below. + </p> + <p> + Xlib provides generally two functions to obtain the characteristics + related to the screen. One with the display and the number of + the screen, which calls <span class="code">ScreenOfDisplay</span>, + and the other that uses the <span class="code">Screen</span> structure. + This might be a bit confusing. As mentioned above, with XCB, it + is better to store the <span class="code">XCBSCREEN</span> + structure. Then, you have to read the members of this + structure. That's why the Xlib functions are put by pairs (or + more) as, with XCB, you will use the same code. + </p> + <ol> + <li class="subtitle"><a name="ScreenOfDisplay">ScreenOfDisplay</a></li> + <p> + This function returns the Xlib <span class="code">Screen</span> + structure. With XCB, you iterate over all thee screens and + once you get the one you want, you return it: + </p> + <pre class="code"><a name="ScreenOfDisplay"></a> +XCBSCREEN *ScreenOfDisplay (XCBConnection *c, + int screen) +{ + XCBSCREENIter iter; + + iter = XCBConnSetupSuccessRepRootsIter (XCBGetSetup (c)); + for (; iter.rem; --screen, XCBSCREENNext (&iter)) + if (screen == 0) + return iter.data; + + return NULL; +} +</pre> + <p> + As mentioned above, you might want to store the value + returned by this function. + </p> + <p> + All the functions below will use the result of that + fonction, as they just grab a specific member of the + <span class="code">XCBSCREEN</span> structure. + </p> + <li class="subtitle"><a name="DefaultScreenOfDisplay"></a>DefaultScreenOfDisplay</li> + <p> + It is the default screen that you obtain when you connect to + the X server. It suffices to call the <a href="#ScreenOfDisplay">ScreenOfDisplay</a> + function above with the connection and the number of the + default screen. + </p> + <pre class="code"> +XCBConnection *c; +int screen_default_nbr; +XCBSCREEN *default_screen; /* the returned default screen */ + +/* you pass the name of the display you want to XCBConnect */ + +c = XCBConnect (display_name, &screen_default_nbr); +default_screen = ScreenOfDisplay (c, screen_default_nbr); + +/* default_screen contains now the default root window, or a NULL window if no screen is found */ +</pre> + <li class="subtitle"><a name="RootWindow">RootWindow / RootWindowOfScreen</a></li> + <p> + </p> + <pre class="code"> +XCBConnection *c; +XCBSCREEN *screen; +int screen_nbr; +XCBWINDOW root_window = { 0 }; /* the returned window */ + +/* you init the connection and screen_nbr */ + +screen = ScreenOfDisplay (c, screen_nbr); +if (screen) + root_window = screen->root; + +/* root_window contains now the root window, or a NULL window if no screen is found */ +</pre> + <li class="subtitle"><a name="DefaultRootWindow">DefaultRootWindow</a></li> + <p> + It is the root window of the default screen. So, you call + <a name="ScreenOfDisplay">ScreenOfDisplay</a> with the + default screen number and you get the + <a href="#RootWindow">root window</a> as above: + </p> + <pre class="code"> +XCBConnection *c; +XCBSCREEN *screen; +int screen_default_nbr; +XCBWINDOW root_window = { 0 }; /* the returned root window */ + +/* you pass the name of the display you want to XCBConnect */ + +c = XCBConnect (display_name, &screen_default_nbr); +screen = ScreenOfDisplay (c, screen_default_nbr); +if (screen) + root_window = screen->root; + +/* root_window contains now the default root window, or a NULL window if no screen is found */ +</pre> + <li class="subtitle"><a name="DefaultVisual">DefaultVisual / DefaultVisualOfScreen</a></li> + <p> + While a Visual is, in Xlib, a structure, in XCB, there are + two types: <span class="code">XCBVISUALID</span>, which is + the Id of the visual, and <span class="code">XCBVISUALTYPE</span>, + which corresponds to the Xlib Visual. To get the Id of the + visual of a screen, just get the + <span class="code">root_visual</span> + member of a <span class="code">XCBSCREEN</span>: + </p> + <pre class="code"> +XCBConnection *c; +XCBSCREEN *screen; +int screen_nbr; +XCBVISUALID root_visual = { 0 }; /* the returned visual Id */ + +/* you init the connection and screen_nbr */ + +screen = ScreenOfDisplay (c, screen_nbr); +if (screen) + root_visual = screen->root_visual; + +/* root_visual contains now the value of the Id of the visual, or a NULL visual if no screen is found */ +</pre> + <p> + To get the <span class="code">XCBVISUALTYPE</span> + structure, it's a bit less easier. You have to get the + <span class="code">XCBSCREEN</span> structure that you want, + get its <span class="code">root_visual</span> member, + then iterate on the <span class="code">XCBDEPTH</span>s + and the <span class="code">XCBVISUALTYPE</span>s, and compare + the <span class="code">XCBVISUALID</span> of these <span class="code">XCBVISUALTYPE</span>s: + with <span class="code">root_visual</span>: + </p> + <pre class="code"> +XCBConnection *c; +XCBSCREEN *screen; +int screen_nbr; +XCBVISUALID root_visual = { 0 }; +XCBVISUATYPE *visual_type = NULL; /* the returned visual type */ + +/* you init the connection and screen_nbr */ + +screen = ScreenOfDisplay (c, screen_nbr); +if (screen) + { + XCBDEPTHIter depth_iter; + + depth_iter = XCBSCREENAllowedDepthsIter (screen); + for (; depth_iter.rem; XCBDEPTHNext (&depth_iter)) + { + XCBVISUALTYPEIter visual_iter; + + visual_iter = XCBDEPTHVisualsIter (depth_iter.data); + for (; visual_iter.rem; XCBVISUALTYPENext (&visual_iter)) + { + if (screen->root_visual.id == visual_iter.data->visual_id.id) + { + visual_type = visual_iter.data; + break; + } + } + } + } + +/* visual_type contains now the visual structure, or a NULL visual structure if no screen is found */ +</pre> + <li class="subtitle"><a name="DefaultGC">DefaultGC / DefaultGCOfScreen</a></li> + <p> + This default Graphic Context is just a newly created Graphic + Context, associated to the root window of a + <span class="code">XCBSCREEN</span>, + using the black white pixels of that screen: + </p> + <pre class="code"> +XCBConnection *c; +XCBSCREEN *screen; +int screen_nbr; +XCBGCONTEXT gc = { 0 }; /* the returned default graphic context */ + +/* you init the connection and screen_nbr */ + +screen = ScreenOfDisplay (c, screen_nbr); +if (screen) + { + XCBDRAWABLE draw; + CARD32 mask; + CARD32 values[2]; + + gc = XCBGCONTEXTNew (c); + draw.window = screen->root; + mask = GCForeground | GCBackground; + values[0] = screen->black_pixel; + values[1] = screen->white_pixel; + XCBCreateGC (c, gc, draw, mask, values); + } + +/* gc contains now the default graphic context */ +</pre> + <li class="subtitle"><a name="BlackPixel">BlackPixel / BlackPixelOfScreen</a></li> + <p> + It is the Id of the black pixel, which is in the structure + of an <span class="code">XCBSCREEN</span>. + </p> + <pre class="code"> +XCBConnection *c; +XCBSCREEN *screen; +int screen_nbr; +CARD32 black_pixel = 0; /* the returned black pixel */ + +/* you init the connection and screen_nbr */ + +screen = ScreenOfDisplay (c, screen_nbr); +if (screen) + black_pixel = screen->black_pixel; + +/* black_pixel contains now the value of the black pixel, or 0 if no screen is found */ +</pre> + <li class="subtitle"><a name="WhitePixel">WhitePixel / WhitePixelOfScreen</a></li> + <p> + It is the Id of the white pixel, which is in the structure + of an <span class="code">XCBSCREEN</span>. + </p> + <pre class="code"> +XCBConnection *c; +XCBSCREEN *screen; +int screen_nbr; +CARD32 white_pixel = 0; /* the returned white pixel */ + +/* you init the connection and screen_nbr */ + +screen = ScreenOfDisplay (c, screen_nbr); +if (screen) + white_pixel = screen->white_pixel; + +/* white_pixel contains now the value of the white pixel, or 0 if no screen is found */ +</pre> + <li class="subtitle"><a name="DisplayWidth">DisplayWidth / WidthOfScreen</a></li> + <p> + It is the width in pixels of the screen that you want, and + which is in the structure of the corresponding + <span class="code">XCBSCREEN</span>. + </p> + <pre class="code"> +XCBConnection *c; +XCBSCREEN *screen; +int screen_nbr; +CARD32 width_in_pixels = 0; /* the returned width in pixels */ + +/* you init the connection and screen_nbr */ + +screen = ScreenOfDisplay (c, screen_nbr); +if (screen) + width_in_pixels = screen->width_in_pixels; + +/* width_in_pixels contains now the width in pixels, or 0 if no screen is found */ +</pre> + <li class="subtitle"><a name="DisplayHeight">DisplayHeight / HeightOfScreen</a></li> + <p> + It is the height in pixels of the screen that you want, and + which is in the structure of the corresponding + <span class="code">XCBSCREEN</span>. + </p> + <pre class="code"> +XCBConnection *c; +XCBSCREEN *screen; +int screen_nbr; +CARD32 height_in_pixels = 0; /* the returned height in pixels */ + +/* you init the connection and screen_nbr */ + +screen = ScreenOfDisplay (c, screen_nbr); +if (screen) + height_in_pixels = screen->height_in_pixels; + +/* height_in_pixels contains now the height in pixels, or 0 if no screen is found */ +</pre> + <li class="subtitle"><a name="DisplayWidthMM">DisplayWidthMM / WidthMMOfScreen</a></li> + <p> + It is the width in millimeters of the screen that you want, and + which is in the structure of the corresponding + <span class="code">XCBSCREEN</span>. + </p> + <pre class="code"> +XCBConnection *c; +XCBSCREEN *screen; +int screen_nbr; +CARD32 width_in_millimeters = 0; /* the returned width in millimeters */ + +/* you init the connection and screen_nbr */ + +screen = ScreenOfDisplay (c, screen_nbr); +if (screen) + width_in_millimeters = screen->width_in_millimeters; + +/* width_in_millimeters contains now the width in millimeters, or 0 if no screen is found */ +</pre> + <li class="subtitle"><a name="DisplayHeightMM">DisplayHeightMM / HeightMMOfScreen</a></li> + <p> + It is the height in millimeters of the screen that you want, and + which is in the structure of the corresponding + <span class="code">XCBSCREEN</span>. + </p> + <pre class="code"> +XCBConnection *c; +XCBSCREEN *screen; +int screen_nbr; +CARD32 height_in_millimeters = 0; /* the returned height in millimeters */ + +/* you init the connection and screen_nbr */ + +screen = ScreenOfDisplay (c, screen_nbr); +if (screen) + height_in_millimeters = screen->height_in_millimeters; + +/* height_in_millimeters contains now the height in millimeters, or 0 if no screen is found */ +</pre> + <li class="subtitle"><a name="DisplayPlanes">DisplayPlanes / DefaultDepth / DefaultDepthOfScreen / PlanesOfScreen</a></li> + <p> + It is the depth (in bits) of the root window of the + screen. You get it from the <span class="code">XCBSCREEN</span> structure. + </p> + <pre class="code"> +XCBConnection *c; +XCBSCREEN *screen; +int screen_nbr; +CARD8 root_depth = 0; /* the returned depth of the root window */ + +/* you init the connection and screen_nbr */ + +screen = ScreenOfDisplay (c, screen_nbr); +if (screen) + root_depth = screen->root_depth; + +/* root_depth contains now the depth of the root window, or 0 if no screen is found */ +</pre> + <li class="subtitle"><a name="DefaultColormap">DefaultColormap / DefaultColormapOfScreen</a></li> + <p> + This is the default colormap of the screen (and not the + (default) colormap of the default screen !). As usual, you + get it from the <span class="code">XCBSCREEN</span> structure: + </p> + <pre class="code"> +XCBConnection *c; +XCBSCREEN *screen; +int screen_nbr; +XCBCOLORMAP default_colormap = { 0 }; /* the returned default colormap */ + +/* you init the connection and screen_nbr */ + +screen = ScreenOfDisplay (c, screen_nbr); +if (screen) + default_colormap = screen->default_colormap; + +/* default_colormap contains now the default colormap, or a NULL colormap if no screen is found */ +</pre> + <li class="subtitle"><a name="MinCmapsOfScreen"></a>MinCmapsOfScreen</li> + <p> + You get the minimum installed colormaps in the <span class="code">XCBSCREEN</span> structure: + </p> + <pre class="code"> +XCBConnection *c; +XCBSCREEN *screen; +int screen_nbr; +CARD16 min_installed_maps = 0; /* the returned minimum installed colormaps */ + +/* you init the connection and screen_nbr */ + +screen = ScreenOfDisplay (c, screen_nbr); +if (screen) + min_installed_maps = screen->min_installed_maps; + +/* min_installed_maps contains now the minimum installed colormaps, or 0 if no screen is found */ +</pre> + <li class="subtitle"><a name="MaxCmapsOfScreen"></a>MaxCmapsOfScreen</li> + <p> + You get the maximum installed colormaps in the <span class="code">XCBSCREEN</span> structure: + </p> + <pre class="code"> +XCBConnection *c; +XCBSCREEN *screen; +int screen_nbr; +CARD16 max_installed_maps = 0; /* the returned maximum installed colormaps */ + +/* you init the connection and screen_nbr */ + +screen = ScreenOfDisplay (c, screen_nbr); +if (screen) + max_installed_maps = screen->max_installed_maps; + +/* max_installed_maps contains now the maximum installed colormaps, or 0 if no screen is found */ +</pre> + <li class="subtitle"><a name="DoesSaveUnders"></a>DoesSaveUnders</li> + <p> + You know if <span class="code">save_unders</span> is set, + by looking in the <span class="code">XCBSCREEN</span> structure: + </p> + <pre class="code"> +XCBConnection *c; +XCBSCREEN *screen; +int screen_nbr; +BOOL save_unders = 0; /* the returned value of save_unders */ + +/* you init the connection and screen_nbr */ + +screen = ScreenOfDisplay (c, screen_nbr); +if (screen) + save_unders = screen->save_unders; + +/* save_unders contains now the value of save_unders, or FALSE if no screen is found */ +</pre> + <li class="subtitle"><a name="DoesBackingStore"></a>DoesBackingStore</li> + <p> + You know the value of <span class="code">backing_stores</span>, + by looking in the <span class="code">XCBSCREEN</span> structure: + </p> + <pre class="code"> +XCBConnection *c; +XCBSCREEN *screen; +int screen_nbr; +BYTE backing_stores = 0; /* the returned value of backing_stores */ + +/* you init the connection and screen_nbr */ + +screen = ScreenOfDisplay (c, screen_nbr); +if (screen) + backing_stores = screen->backing_stores; + +/* backing_stores contains now the value of backing_stores, or FALSE if no screen is found */ +</pre> + <li class="subtitle"><a name="EventMaskOfScreen"></a>EventMaskOfScreen</li> + <p> + To get the current input masks, + you look in the <span class="code">XCBSCREEN</span> structure: + </p> + <pre class="code"> +XCBConnection *c; +XCBSCREEN *screen; +int screen_nbr; +CARD32 current_input_masks = 0; /* the returned value of current input masks */ + +/* you init the connection and screen_nbr */ + +screen = ScreenOfDisplay (c, screen_nbr); +if (screen) + current_input_masks = screen->current_input_masks; + +/* current_input_masks contains now the value of the current input masks, or FALSE if no screen is found */ +</pre> + </ol> + <li class="subtitle"><a name="misc">Miscellaneous macros</a></li> + <ol> + <li class="subtitle"><a name="DisplayOfScreen"></a>DisplayOfScreen</li> + <p> + in Xlib, the <span class="code">Screen</span> structure + stores its associated <span class="code">Display</span> + structure. This is not the case in the X Window protocol, + hence, it's also not the case in XCB. So you have to store + it by yourself. + </p> + <li class="subtitle"><a name="DisplayCells"></a>DisplayCells / CellsOfScreen</li> + <p> + To get the colormap entries, + you look in the <span class="code">XCBVISUALTYPE</span> + structure, that you grab like <a class="subsection" href="#DefaultVisual">here</a>: + </p> + <pre class="code"> +XCBConnection *c; +XCBVISUALTYPE *visual_type; +CARD16 colormap_entries = 0; /* the returned value of the colormap entries */ + +/* you init the connection and visual_type */ + +if (visual_type) + colormap_entries = visual_type->colormap_entries; + +/* colormap_entries contains now the value of the colormap entries, or FALSE if no screen is found */ +</pre> + </ol> + </ol> + </ol> + </div> +</body> + +</html> diff --git a/doc/tutorial/xcb.css b/doc/tutorial/xcb.css new file mode 100755 index 0000000..84352c5 --- /dev/null +++ b/doc/tutorial/xcb.css @@ -0,0 +1,82 @@ +body +{ + background-color: #dddddd; + color: #000000; + padding: 8px; + margin: 0px; +} +div.title +{ + text-align: center; + font-weight: bold; + font-size: 28px; +} +div.emph +{ + text-align: left; + font-weight: bold; +} +div.section li.title +{ + font-weight: bold; + font-size: 22px; +} +div.section li.subtitle +{ + font-weight: bold; + font-size: 18px; +} +div.section li.subsubtitle +{ + font-weight: bold; + font-size: 16px; +} +div.comp +{ + border: thin solid #000000; + background-color: #ffffe0; + padding: 14px; +} +div.comp div.title +{ + font-weight: bold; + font-size: 16px; + text-align: center; +} +div.comp div.xlib +{ + font-family: monospace; + position: absolute; + width: 49%; + margin-left: 0px; + margin-top: 10px; +} +div.comp div.xcb +{ + font-family: monospace; + position: relative; + margin-left: 51%; + margin-top: 10px; +} +pre.code +{ + border: thin solid #000000; + background-color: #efefef; + padding: 4px; + text-align: left; + font-size: 10; +} +pre.text +{ + border: thin solid #000000; + background-color: #efefef; + padding: 4px; + text-align: left; + font-size: 10; +} +span.code +{ + font-family: monospace; + font-size: 10; +} + diff --git a/src/.cvsignore b/src/.cvsignore new file mode 100644 index 0000000..adf4164 --- /dev/null +++ b/src/.cvsignore @@ -0,0 +1,17 @@ +.deps +.libs +Makefile +Makefile.in +config.h +config.h.in +stamp-h1 +*.lo +*.loT +*.la +xproto.c +xproto.h +xcb_types.c +xcb_types.h +extensions +X11 +check_all diff --git a/src/Makefile.am b/src/Makefile.am new file mode 100644 index 0000000..8d43475 --- /dev/null +++ b/src/Makefile.am @@ -0,0 +1,83 @@ +lib_LTLIBRARIES = libXCB.la + +EXTHEADERS = \ + extensions/bigreq.h \ + extensions/composite.h \ + extensions/damage.h \ + extensions/glx.h \ + extensions/shm.h \ + extensions/shape.h \ + extensions/randr.h \ + extensions/record.h \ + extensions/render.h \ + extensions/res.h \ + extensions/dpms.h \ + extensions/sync.h \ + extensions/xc_misc.h \ + extensions/xevie.h \ + extensions/xf86dri.h \ + extensions/xfixes.h \ + extensions/xprint.h \ + extensions/xv.h \ + extensions/xvmc.h +EXTSOURCES = \ + extensions/bigreq.c \ + extensions/composite.c \ + extensions/damage.c \ + extensions/glx.c \ + extensions/shm.c \ + extensions/shape.c \ + extensions/randr.c \ + extensions/record.c \ + extensions/render.c \ + extensions/res.c \ + extensions/dpms.c \ + extensions/sync.c \ + extensions/xc_misc.c \ + extensions/xevie.c \ + extensions/xf86dri.c \ + extensions/xfixes.c \ + extensions/xprint.c \ + extensions/xv.c \ + extensions/xvmc.c +EXTENSIONS = $(EXTSOURCES) $(EXTHEADERS) + +COREHEADERS = xproto.h xcb_types.h +CORESOURCES = xproto.c xcb_types.c +COREPROTO = $(CORESOURCES) $(COREHEADERS) + +xcbinclude_HEADERS = xcb.h xcbext.h xcbxlib.h $(COREHEADERS) $(EXTHEADERS) + +CFLAGS = +AM_CFLAGS = -include config.h $(CDEBUGFLAGS) $(XCBPROTO_CFLAGS) $(XPROTO_CFLAGS) $(XAU_CFLAGS) +libXCB_la_LIBADD = $(XCBPROTO_LIBS) $(XPROTO_LIBS) $(XAU_LIBS) +libXCB_la_SOURCES = \ + xcb_conn.c xcb_out.c xcb_in.c xcb_ext.c xcb_xid.c \ + xcb_list.c xcb_util.c xcb_xlib.c xcb_auth.c xcb_des.c \ + $(COREPROTO) $(EXTENSIONS) + +xcb_des.c: + touch xcb_des.c + +BUILT_SOURCES = $(COREPROTO) $(EXTENSIONS) +CLEANFILES = $(COREPROTO) $(EXTENSIONS) +clean-local: + rmdir extensions || true + +vpath %.xml $(XCBPROTO_XCBINCLUDEDIR) $(XCBPROTO_XCBINCLUDEDIR)/extensions + +%.h: %.xml c-client.xsl + @n=`dirname $*`; test -d $$n || (echo mkdir $$n; mkdir $$n) + $(XSLTPROC) --stringparam mode header \ + --stringparam base-path $(XCBPROTO_XCBINCLUDEDIR)/ \ + --stringparam extension-path \ + $(XCBPROTO_XCBINCLUDEDIR)/extensions/ \ + -o $@ $(srcdir)/c-client.xsl $< + +%.c: %.xml c-client.xsl + @n=`dirname $*`; test -d $$n || (echo mkdir $$n; mkdir $$n) + $(XSLTPROC) --stringparam mode source \ + --stringparam base-path $(XCBPROTO_XCBINCLUDEDIR)/ \ + --stringparam extension-path \ + $(XCBPROTO_XCBINCLUDEDIR)/extensions/ \ + -o $@ $(srcdir)/c-client.xsl $< diff --git a/src/c-client.xsl b/src/c-client.xsl new file mode 100644 index 0000000..903895d --- /dev/null +++ b/src/c-client.xsl @@ -0,0 +1,1301 @@ +<?xml version="1.0" encoding="utf-8"?> +<!-- +Copyright (C) 2004 Josh Triplett. All Rights Reserved. + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION +WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + +Except as contained in this notice, the names of the authors or their +institutions shall not be used in advertising or otherwise to promote the +sale, use or other dealings in this Software without prior written +authorization from the authors. +--> +<xsl:transform xmlns:xsl="http://www.w3.org/1999/XSL/Transform" + version="1.0" + xmlns:e="http://exslt.org/common"> + + <xsl:output method="text" /> + + <xsl:strip-space elements="*" /> + + <!-- "header" or "source" --> + <xsl:param name="mode" /> + + <!-- Path to the core protocol descriptions. --> + <xsl:param name="base-path" /> + + <!-- Path to the extension protocol descriptions. --> + <xsl:param name="extension-path" select="$base-path" /> + + <xsl:variable name="h" select="$mode = 'header'" /> + <xsl:variable name="c" select="$mode = 'source'" /> + + <!-- String used to indent lines of code. --> + <xsl:variable name="indent-string" select="' '" /> + + <xsl:variable name="ucase" select="'ABCDEFGHIJKLMNOPQRSTUVWXYZ'" /> + <xsl:variable name="lcase" select="'abcdefghijklmnopqrstuvwxyz'" /> + + <xsl:variable name="header" select="/xcb/@header" /> + <xsl:variable name="ucase-header" + select="translate($header,$lcase,$ucase)" /> + + <xsl:variable name="ext" select="/xcb/@extension-name" /> + + <!-- Other protocol descriptions to search for types in, after checking the + current protocol description. --> + <xsl:variable name="search-path-rtf"> + <xsl:for-each select="/xcb/import"> + <path><xsl:value-of select="concat($extension-path, ., '.xml')" /></path> + </xsl:for-each> + <xsl:choose> + <xsl:when test="$header='xproto'"> + <path><xsl:value-of select="concat($base-path, + 'xcb_types.xml')" /></path> + </xsl:when> + <xsl:when test="$header='xcb_types'" /> + <xsl:otherwise> + <path><xsl:value-of select="concat($base-path, + 'xproto.xml')" /></path> + <path><xsl:value-of select="concat($base-path, + 'xcb_types.xml')" /></path> + </xsl:otherwise> + </xsl:choose> + </xsl:variable> + <xsl:variable name="search-path" select="e:node-set($search-path-rtf)/path"/> + + <xsl:variable name="root" select="/" /> + + <!-- First pass: Store everything in a variable. --> + <xsl:variable name="pass1-rtf"> + <xsl:apply-templates select="/" mode="pass1" /> + </xsl:variable> + <xsl:variable name="pass1" select="e:node-set($pass1-rtf)" /> + + <xsl:template match="xcb" mode="pass1"> + <xcb> + <xsl:copy-of select="@*" /> + <xsl:if test="$ext"> + <constant type="XCBExtension" name="XCB{$ext}Id"> + <xsl:attribute name="value">{ "<xsl:value-of select="@extension-xname" />" }</xsl:attribute> + </constant> + <function type="const XCBQueryExtensionRep *" name="XCB{$ext}Init"> + <field type="XCBConnection *" name="c" /> + <l>return XCBGetExtensionData(c, &XCB<!-- + --><xsl:value-of select="$ext" />Id);</l> + </function> + </xsl:if> + <xsl:apply-templates mode="pass1" /> + </xcb> + </xsl:template> + + <!-- Modify names that conflict with C++ keywords by prefixing them with an + underscore. If the name parameter is not specified, it defaults to the + value of the name attribute on the context node. --> + <xsl:template name="canonical-var-name"> + <xsl:param name="name" select="@name" /> + <xsl:if test="$name='new' or $name='delete' + or $name='class' or $name='operator'"> + <xsl:text>_</xsl:text> + </xsl:if> + <xsl:value-of select="$name" /> + </xsl:template> + + <!-- List of core types, for use in canonical-type-name. --> + <xsl:variable name="core-types-rtf"> + <type name="BOOL" /> + <type name="BYTE" /> + <type name="CARD8" /> + <type name="CARD16" /> + <type name="CARD32" /> + <type name="INT8" /> + <type name="INT16" /> + <type name="INT32" /> + + <type name="char" /> + <type name="void" /> + <type name="float" /> + <type name="double" /> + <type name="XID" /> + </xsl:variable> + <xsl:variable name="core-types" select="e:node-set($core-types-rtf)" /> + + <!-- + Output the canonical name for a type. This will be + XCB{extension-containing-Type-if-any}Type, wherever the type is found in + the search path, or just Type if not found. If the type parameter is not + specified, it defaults to the value of the type attribute on the context + node. + --> + <xsl:template name="canonical-type-name"> + <xsl:param name="type" select="string(@type)" /> + + <xsl:variable name="is-unqualified" select="not(contains($type, ':'))"/> + <xsl:variable name="namespace" select="substring-before($type, ':')" /> + <xsl:variable name="unqualified-type"> + <xsl:choose> + <xsl:when test="$is-unqualified"> + <xsl:value-of select="$type" /> + </xsl:when> + <xsl:otherwise> + <xsl:value-of select="substring-after($type, ':')" /> + </xsl:otherwise> + </xsl:choose> + </xsl:variable> + + <xsl:choose> + <xsl:when test="$is-unqualified and $core-types/type[@name=$type]"> + <xsl:value-of select="$type" /> + </xsl:when> + <xsl:otherwise> + <xsl:variable name="type-definitions" + select="(/xcb|document($search-path)/xcb + )[$is-unqualified or @header=$namespace] + /*[((self::struct or self::union + or self::xidtype or self::enum + or self::event or self::eventcopy + or self::error or self::errorcopy) + and @name=$unqualified-type) + or (self::typedef + and @newname=$unqualified-type)]" /> + <xsl:choose> + <xsl:when test="count($type-definitions) = 1"> + <xsl:for-each select="$type-definitions"> + <xsl:text>XCB</xsl:text> + <xsl:value-of select="concat(/xcb/@extension-name, + $unqualified-type)" /> + </xsl:for-each> + </xsl:when> + <xsl:when test="count($type-definitions) > 1"> + <xsl:message terminate="yes"> + <xsl:text>Multiple definitions of type "</xsl:text> + <xsl:value-of select="$type" /> + <xsl:text>" found.</xsl:text> + <xsl:if test="$is-unqualified"> + <xsl:for-each select="$type-definitions"> + <xsl:text> + </xsl:text> + <xsl:value-of select="concat(/xcb/@header, ':', $type)" /> + </xsl:for-each> + </xsl:if> + </xsl:message> + </xsl:when> + <xsl:otherwise> + <xsl:message terminate="yes"> + <xsl:text>No definitions of type "</xsl:text> + <xsl:value-of select="$type" /> + <xsl:text>" found</xsl:text> + <xsl:if test="$is-unqualified"> + <xsl:text>, and it is not a known core type</xsl:text> + </xsl:if> + <xsl:text>.</xsl:text> + </xsl:message> + </xsl:otherwise> + </xsl:choose> + </xsl:otherwise> + </xsl:choose> + </xsl:template> + + <!-- Helper template for requests, that outputs the cookie type. The + context node must be the request. --> + <xsl:template name="cookie-type"> + <xsl:text>XCB</xsl:text> + <xsl:choose> + <xsl:when test="reply"> + <xsl:value-of select="concat($ext, @name)" /> + </xsl:when> + <xsl:otherwise> + <xsl:text>Void</xsl:text> + </xsl:otherwise> + </xsl:choose> + <xsl:text>Cookie</xsl:text> + </xsl:template> + + <xsl:template match="request" mode="pass1"> + <xsl:if test="reply"> + <struct name="XCB{$ext}{@name}Cookie"> + <field type="unsigned int" name="sequence" /> + </struct> + </xsl:if> + <struct name="XCB{$ext}{@name}Req"> + <field type="CARD8" name="major_opcode" no-assign="true" /> + <xsl:if test="$ext"> + <field type="CARD8" name="minor_opcode" no-assign="true" /> + </xsl:if> + <xsl:apply-templates select="*[not(self::reply)]" mode="field" /> + <middle> + <field type="CARD16" name="length" no-assign="true" /> + </middle> + </struct> + <function name="XCB{$ext}{@name}"> + <xsl:attribute name="type"> + <xsl:call-template name="cookie-type" /> + </xsl:attribute> + <field type="XCBConnection *" name="c" /> + <xsl:apply-templates select="*[not(self::reply)]" mode="param" /> + <do-request ref="XCB{$ext}{@name}Req" opcode="{@opcode}"> + <xsl:if test="reply"> + <xsl:attribute name="has-reply">true</xsl:attribute> + </xsl:if> + </do-request> + </function> + <xsl:if test="reply"> + <struct name="XCB{$ext}{@name}Rep"> + <field type="BYTE" name="response_type" /> + <xsl:apply-templates select="reply/*" mode="field" /> + <middle> + <field type="CARD16" name="sequence" /> + <field type="CARD32" name="length" /> + </middle> + </struct> + <iterator-functions ref="XCB{$ext}{@name}" kind="Rep" /> + <function type="XCB{$ext}{@name}Rep *" name="XCB{$ext}{@name}Reply"> + <field type="XCBConnection *" name="c" /> + <field name="cookie"> + <xsl:attribute name="type"> + <xsl:call-template name="cookie-type" /> + </xsl:attribute> + </field> + <field type="XCBGenericError **" name="e" /> + <l>return (XCB<xsl:value-of select="concat($ext, @name)" />Rep *)<!-- + --> XCBWaitForReply(c, cookie.sequence, e);</l> + </function> + </xsl:if> + </xsl:template> + + <xsl:template match="xidtype" mode="pass1"> + <struct name="XCB{$ext}{@name}"> + <field type="CARD32" name="xid" /> + </struct> + <iterator ref="XCB{$ext}{@name}" /> + <iterator-functions ref="XCB{$ext}{@name}" /> + <function type="XCB{$ext}{@name}" name="XCB{$ext}{@name}New"> + <field type="XCBConnection *" name="c" /> + <l>XCB<xsl:value-of select="concat($ext, @name)" /> ret;</l> + <l>ret.xid = XCBGenerateID(c);</l> + <l>return ret;</l> + </function> + </xsl:template> + + <xsl:template match="struct|union" mode="pass1"> + <struct name="XCB{$ext}{@name}"> + <xsl:if test="self::union"> + <xsl:attribute name="kind">union</xsl:attribute> + </xsl:if> + <xsl:apply-templates select="*" mode="field" /> + </struct> + <iterator ref="XCB{$ext}{@name}" /> + <iterator-functions ref="XCB{$ext}{@name}" /> + </xsl:template> + + <xsl:template match="event|eventcopy|error|errorcopy" mode="pass1"> + <xsl:variable name="suffix"> + <xsl:choose> + <xsl:when test="self::event|self::eventcopy"> + <xsl:text>Event</xsl:text> + </xsl:when> + <xsl:when test="self::error|self::errorcopy"> + <xsl:text>Error</xsl:text> + </xsl:when> + </xsl:choose> + </xsl:variable> + <constant type="number" name="XCB{$ext}{@name}" value="{@number}" /> + <xsl:choose> + <xsl:when test="self::event|self::error"> + <struct name="XCB{$ext}{@name}{$suffix}"> + <field type="BYTE" name="response_type" /> + <xsl:if test="self::error"> + <field type="BYTE" name="error_code" /> + </xsl:if> + <xsl:apply-templates select="*" mode="field" /> + <xsl:if test="not(self::event and boolean(@no-sequence-number))"> + <middle> + <field type="CARD16" name="sequence" /> + </middle> + </xsl:if> + </struct> + </xsl:when> + <xsl:when test="self::eventcopy|self::errorcopy"> + <typedef newname="XCB{$ext}{@name}{$suffix}"> + <xsl:attribute name="oldname"> + <xsl:call-template name="canonical-type-name"> + <xsl:with-param name="type" select="@ref" /> + </xsl:call-template> + <xsl:value-of select="$suffix" /> + </xsl:attribute> + </typedef> + </xsl:when> + </xsl:choose> + </xsl:template> + + <xsl:template match="typedef" mode="pass1"> + <typedef> + <xsl:attribute name="oldname"> + <xsl:call-template name="canonical-type-name"> + <xsl:with-param name="type" select="@oldname" /> + </xsl:call-template> + </xsl:attribute> + <xsl:attribute name="newname"> + <xsl:call-template name="canonical-type-name"> + <xsl:with-param name="type" select="@newname" /> + </xsl:call-template> + </xsl:attribute> + </typedef> + <iterator ref="XCB{$ext}{@newname}" /> + <iterator-functions ref="XCB{$ext}{@newname}" /> + </xsl:template> + + <xsl:template match="enum" mode="pass1"> + <enum name="XCB{$ext}{@name}"> + <xsl:for-each select="item"> + <item name="XCB{$ext}{../@name}{@name}"> + <xsl:copy-of select="*" /> + </item> + </xsl:for-each> + </enum> + </xsl:template> + + <!-- + Templates for processing fields. + --> + + <xsl:template match="pad" mode="field"> + <xsl:copy-of select="." /> + </xsl:template> + + <xsl:template match="field|exprfield" mode="field"> + <xsl:copy> + <xsl:attribute name="type"> + <xsl:call-template name="canonical-type-name" /> + </xsl:attribute> + <xsl:attribute name="name"> + <xsl:call-template name="canonical-var-name" /> + </xsl:attribute> + <xsl:copy-of select="*" /> + </xsl:copy> + </xsl:template> + + <xsl:template match="list" mode="field"> + <xsl:variable name="type"><!-- + --><xsl:call-template name="canonical-type-name" /><!-- + --></xsl:variable> + <list type="{$type}"> + <xsl:attribute name="name"> + <xsl:call-template name="canonical-var-name" /> + </xsl:attribute> + <xsl:if test="not(parent::request) and node() + and not(.//*[not(self::value or self::op)])"> + <xsl:attribute name="fixed">true</xsl:attribute> + </xsl:if> + <!-- Handle lists with no length expressions. --> + <xsl:if test="not(node())"> + <xsl:choose> + <!-- In a request, refer to an implicit localparam for length. --> + <xsl:when test="parent::request"> + <fieldref> + <xsl:value-of select="concat(@name, '_len')" /> + </fieldref> + </xsl:when> + <!-- In a reply, use the length of the reply to determine the length + of the list. --> + <xsl:when test="parent::reply"> + <op op="/"> + <op op="<<"> + <fieldref>length</fieldref> + <value>2</value> + </op> + <function-call name="sizeof"> + <param><xsl:value-of select="$type" /></param> + </function-call> + </op> + </xsl:when> + <!-- Other cases generate an error. --> + <xsl:otherwise> + <xsl:message terminate="yes"><!-- + -->Encountered a list with no length expresssion outside a<!-- + --> request or reply.<!-- + --></xsl:message> + </xsl:otherwise> + </xsl:choose> + </xsl:if> + <xsl:copy-of select="*" /> + </list> + </xsl:template> + + <xsl:template match="valueparam" mode="field"> + <field> + <xsl:attribute name="type"> + <xsl:call-template name="canonical-type-name"> + <xsl:with-param name="type" select="@value-mask-type" /> + </xsl:call-template> + </xsl:attribute> + <xsl:attribute name="name"> + <xsl:call-template name="canonical-var-name"> + <xsl:with-param name="name" select="@value-mask-name" /> + </xsl:call-template> + </xsl:attribute> + </field> + <list type="CARD32"> + <xsl:attribute name="name"> + <xsl:call-template name="canonical-var-name"> + <xsl:with-param name="name" select="@value-list-name" /> + </xsl:call-template> + </xsl:attribute> + <function-call name="XCBPopcount"> + <param> + <fieldref> + <xsl:call-template name="canonical-var-name"> + <xsl:with-param name="name" select="@value-mask-name" /> + </xsl:call-template> + </fieldref> + </param> + </function-call> + </list> + </xsl:template> + + <xsl:template match="field|localfield" mode="param"> + <field> + <xsl:attribute name="type"> + <xsl:call-template name="canonical-type-name" /> + </xsl:attribute> + <xsl:attribute name="name"> + <xsl:call-template name="canonical-var-name" /> + </xsl:attribute> + </field> + </xsl:template> + + <xsl:template match="list" mode="param"> + <!-- If no length expression is provided, use a CARD32 localfield. --> + <xsl:if test="not(node())"> + <field type="CARD32" name="{@name}_len" /> + </xsl:if> + <field> + <xsl:attribute name="type"> + <xsl:text>const </xsl:text> + <xsl:call-template name="canonical-type-name" /> + <xsl:text> *</xsl:text> + </xsl:attribute> + <xsl:attribute name="name"> + <xsl:call-template name="canonical-var-name" /> + </xsl:attribute> + </field> + </xsl:template> + + <xsl:template match="valueparam" mode="param"> + <field> + <xsl:attribute name="type"> + <xsl:call-template name="canonical-type-name"> + <xsl:with-param name="type" select="@value-mask-type" /> + </xsl:call-template> + </xsl:attribute> + <xsl:attribute name="name"> + <xsl:call-template name="canonical-var-name"> + <xsl:with-param name="name" select="@value-mask-name" /> + </xsl:call-template> + </xsl:attribute> + </field> + <field type="const CARD32 *"> + <xsl:attribute name="name"> + <xsl:call-template name="canonical-var-name"> + <xsl:with-param name="name" select="@value-list-name" /> + </xsl:call-template> + </xsl:attribute> + </field> + </xsl:template> + + <!-- Second pass: Process the variable. --> + <xsl:variable name="result-rtf"> + <xsl:apply-templates select="$pass1/*" mode="pass2" /> + </xsl:variable> + <xsl:variable name="result" select="e:node-set($result-rtf)" /> + + <xsl:template match="xcb" mode="pass2"> + <xcb> + <xsl:copy-of select="@*" /> + <xsl:apply-templates mode="pass2" + select="constant|enum|struct|typedef|iterator" /> + <xsl:apply-templates mode="pass2" + select="function|iterator-functions" /> + </xcb> + </xsl:template> + + <!-- Generic rules for nodes that don't need further processing: copy node + with attributes, and recursively process the child nodes. --> + <xsl:template match="*" mode="pass2"> + <xsl:copy> + <xsl:copy-of select="@*" /> + <xsl:apply-templates mode="pass2" /> + </xsl:copy> + </xsl:template> + + <xsl:template match="struct" mode="pass2"> + <xsl:if test="@kind='union' and list[not(@fixed)]"> + <xsl:message terminate="yes">Unions must be fixed length.</xsl:message> + </xsl:if> + <struct name="{@name}"> + <xsl:if test="@kind"> + <xsl:attribute name="kind"> + <xsl:value-of select="@kind" /> + </xsl:attribute> + </xsl:if> + <!-- FIXME: This should go by size, not number of fields. --> + <xsl:copy-of select="node()[not(self::middle) + and position() < 3]" /> + <xsl:if test="middle and (count(*[not(self::middle)]) < 2)"> + <pad bytes="{2 - count(*[not(self::middle)])}" /> + </xsl:if> + <xsl:copy-of select="middle/*" /> + <xsl:copy-of select="node()[not(self::middle) and (position() > 2)]" /> + </struct> + </xsl:template> + + <xsl:template match="do-request" mode="pass2"> + <xsl:variable name="struct" + select="$pass1/xcb/struct[@name=current()/@ref]" /> + + <xsl:variable name="num-parts" select="1+count($struct/list)" /> + + <l>static const XCBProtocolRequest xcb_req = {</l> + <indent> + <l>/* count */ <xsl:value-of select="$num-parts" />,</l> + <l>/* ext */ <xsl:choose> + <xsl:when test="$ext"> + <xsl:text>&XCB</xsl:text> + <xsl:value-of select="$ext" /> + <xsl:text>Id</xsl:text> + </xsl:when> + <xsl:otherwise>0</xsl:otherwise> + </xsl:choose>,</l> + <l>/* opcode */ <xsl:value-of select="@opcode" />,</l> + <l>/* isvoid */ <xsl:value-of select="1-boolean(@has-reply)" /></l> + </indent> + <l>};</l> + + <l /> + <l>struct iovec xcb_parts[<xsl:value-of select="$num-parts" />];</l> + <l><xsl:value-of select="../@type" /> xcb_ret;</l> + <l><xsl:value-of select="@ref" /> xcb_out;</l> + + <l /> + <xsl:apply-templates select="$struct//*[(self::field or self::exprfield) + and not(boolean(@no-assign))]" + mode="assign" /> + + <l /> + <l>xcb_parts[0].iov_base = &xcb_out;</l> + <l>xcb_parts[0].iov_len = sizeof(xcb_out);</l> + + <xsl:for-each select="$struct/list"> + <l>xcb_parts[<xsl:number />].iov_base = (void *) <!-- + --><xsl:value-of select="@name" />;</l> + <l>xcb_parts[<xsl:number />].iov_len = <!-- + --><xsl:apply-templates mode="output-expression" /><!-- + --><xsl:if test="not(@type = 'void')"> + <xsl:text> * sizeof(</xsl:text> + <xsl:value-of select="@type" /> + <xsl:text>)</xsl:text> + </xsl:if>;</l> + </xsl:for-each> + + <l>XCBSendRequest(c, &xcb_ret.sequence, xcb_parts, &xcb_req);</l> + <l>return xcb_ret;</l> + </xsl:template> + + <xsl:template match="field" mode="assign"> + <l> + <xsl:text>xcb_out.</xsl:text> + <xsl:value-of select="@name" /> + <xsl:text> = </xsl:text> + <xsl:value-of select="@name" /> + <xsl:text>;</xsl:text> + </l> + </xsl:template> + + <xsl:template match="exprfield" mode="assign"> + <l> + <xsl:text>xcb_out.</xsl:text> + <xsl:value-of select="@name" /> + <xsl:text> = </xsl:text> + <xsl:apply-templates mode="output-expression" /> + <xsl:text>;</xsl:text> + </l> + </xsl:template> + + <xsl:template match="iterator" mode="pass2"> + <struct name="{@ref}Iter"> + <field type="{@ref} *" name="data" /> + <field type="int" name="rem" /> + <field type="int" name="index" /> + </struct> + </xsl:template> + + <!-- Change a_name_like_this to ANameLikeThis. If the parameter name is not + given, it defaults to the name attribute of the context node. --> + <xsl:template name="capitalize"> + <xsl:param name="name" select="string(@name)" /> + <xsl:if test="$name"> + <xsl:value-of select="translate(substring($name,1,1), $lcase, $ucase)" /> + <xsl:choose> + <xsl:when test="contains($name, '_')"> + <xsl:value-of select="substring(substring-before($name, '_'), 2)" /> + <xsl:call-template name="capitalize"> + <xsl:with-param name="name" select="substring-after($name, '_')" /> + </xsl:call-template> + </xsl:when> + <xsl:otherwise> + <xsl:value-of select="substring($name, 2)" /> + </xsl:otherwise> + </xsl:choose> + </xsl:if> + </xsl:template> + + <xsl:template match="iterator-functions" mode="pass2"> + <xsl:variable name="ref" select="@ref" /> + <xsl:variable name="kind" select="@kind" /> + <xsl:variable name="struct" + select="$pass1/xcb/struct[@name=concat($ref,$kind)]" /> + <xsl:variable name="nextfields-rtf"> + <nextfield>R + 1</nextfield> + <xsl:for-each select="$struct/list[not(@fixed)]"> + <xsl:choose> + <xsl:when test="substring(@type, 1, 3) = 'XCB'"> + <nextfield><xsl:value-of select="@type" />End(<!-- + --><xsl:value-of select="$ref" /><!-- + --><xsl:call-template name="capitalize" />Iter(R))</nextfield> + </xsl:when> + <xsl:otherwise> + <nextfield><xsl:value-of select="$ref" /><!-- + --><xsl:call-template name="capitalize" />End(R)</nextfield> + </xsl:otherwise> + </xsl:choose> + </xsl:for-each> + </xsl:variable> + <xsl:variable name="nextfields" select="e:node-set($nextfields-rtf)" /> + <xsl:for-each select="$struct/list[not(@fixed)]"> + <xsl:variable name="number" + select="1+count(preceding-sibling::list[not(@fixed)])" /> + <xsl:variable name="nextfield" select="$nextfields/nextfield[$number]" /> + <xsl:variable name="is-first" + select="not(preceding-sibling::list[not(@fixed)])" /> + <xsl:variable name="field-name"><!-- + --><xsl:call-template name="capitalize" /><!-- + --></xsl:variable> + <xsl:variable name="is-variable" + select="$pass1/xcb/struct[@name=current()/@type]/list + or document($search-path)/xcb + /struct[concat('XCB', + ancestor::xcb/@extension-name, + @name) = current()/@type] + /*[self::valueparam or self::list]" /> + <xsl:if test="not($is-variable)"> + <function type="{@type} *" name="{$ref}{$field-name}"> + <field type="{$ref}{$kind} *" name="R" /> + <xsl:choose> + <xsl:when test="$is-first"> + <l>return (<xsl:value-of select="@type" /> *) <!-- + -->(<xsl:value-of select="$nextfield" />);</l> + </xsl:when> + <xsl:otherwise> + <l>XCBGenericIter prev = <!-- + --><xsl:value-of select="$nextfield" />;</l> + <l>return (<xsl:value-of select="@type" /> *) <!-- + -->((char *) prev.data + XCB_TYPE_PAD(<!-- + --><xsl:value-of select="@type" />, prev.index));</l> + </xsl:otherwise> + </xsl:choose> + </function> + </xsl:if> + <function type="int" name="{$ref}{$field-name}Length"> + <field type="{$ref}{$kind} *" name="R" /> + <l>return <xsl:apply-templates mode="output-expression"> + <xsl:with-param name="field-prefix" select="'R->'" /> + </xsl:apply-templates>;</l> + </function> + <xsl:choose> + <xsl:when test="substring(@type, 1, 3) = 'XCB'"> + <function type="{@type}Iter" name="{$ref}{$field-name}Iter"> + <field type="{$ref}{$kind} *" name="R" /> + <l><xsl:value-of select="@type" />Iter i;</l> + <xsl:choose> + <xsl:when test="$is-first"> + <l>i.data = (<xsl:value-of select="@type" /> *) <!-- + -->(<xsl:value-of select="$nextfield" />);</l> + </xsl:when> + <xsl:otherwise> + <l>XCBGenericIter prev = <!-- + --><xsl:value-of select="$nextfield" />;</l> + <l>i.data = (<xsl:value-of select="@type" /> *) <!-- + -->((char *) prev.data + XCB_TYPE_PAD(<!-- + --><xsl:value-of select="@type" />, prev.index));</l> + </xsl:otherwise> + </xsl:choose> + <l>i.rem = <xsl:apply-templates mode="output-expression"> + <xsl:with-param name="field-prefix" select="'R->'" /> + </xsl:apply-templates>;</l> + <l>i.index = (char *) i.data - (char *) R;</l> + <l>return i;</l> + </function> + </xsl:when> + <xsl:otherwise> + <xsl:variable name="cast"> + <xsl:choose> + <xsl:when test="@type='void'">char</xsl:when> + <xsl:otherwise><xsl:value-of select="@type" /></xsl:otherwise> + </xsl:choose> + </xsl:variable> + <function type="XCBGenericIter" name="{$ref}{$field-name}End"> + <field type="{$ref}{$kind} *" name="R" /> + <l>XCBGenericIter i;</l> + <xsl:choose> + <xsl:when test="$is-first"> + <l>i.data = ((<xsl:value-of select="$cast" /> *) <!-- + -->(<xsl:value-of select="$nextfield" />)) + (<!-- + --><xsl:apply-templates mode="output-expression"> + <xsl:with-param name="field-prefix" select="'R->'" /> + </xsl:apply-templates>);</l> + </xsl:when> + <xsl:otherwise> + <l>XCBGenericIter child = <!-- + --><xsl:value-of select="$nextfield" />;</l> + <l>i.data = ((<xsl:value-of select="$cast" /> *) <!-- + -->child.data) + (<!-- + --><xsl:apply-templates mode="output-expression"> + <xsl:with-param name="field-prefix" select="'R->'" /> + </xsl:apply-templates>);</l> + </xsl:otherwise> + </xsl:choose> + <l>i.rem = 0;</l> + <l>i.index = (char *) i.data - (char *) R;</l> + <l>return i;</l> + </function> + </xsl:otherwise> + </xsl:choose> + </xsl:for-each> + <xsl:if test="not($kind)"> + <function type="void" name="{$ref}Next"> + <field type="{$ref}Iter *" name="i" /> + <xsl:choose> + <xsl:when test="$struct/list[not(@fixed)]"> + <l><xsl:value-of select="$ref" /> *R = i->data;</l> + <l>XCBGenericIter child = <!-- + --><xsl:value-of select="$nextfields/nextfield[last()]" />;</l> + <l>--i->rem;</l> + <l>i->data = (<xsl:value-of select="$ref" /> *) child.data;</l> + <l>i->index = child.index;</l> + </xsl:when> + <xsl:otherwise> + <l>--i->rem;</l> + <l>++i->data;</l> + <l>i->index += sizeof(<xsl:value-of select="$ref" />);</l> + </xsl:otherwise> + </xsl:choose> + </function> + <function type="XCBGenericIter" name="{$ref}End"> + <field type="{$ref}Iter" name="i" /> + <l>XCBGenericIter ret;</l> + <xsl:choose> + <xsl:when test="$struct/list[not(@fixed)]"> + <l>while(i.rem > 0)</l> + <indent> + <l><xsl:value-of select="$ref" />Next(&i);</l> + </indent> + <l>ret.data = i.data;</l> + <l>ret.rem = i.rem;</l> + <l>ret.index = i.index;</l> + </xsl:when> + <xsl:otherwise> + <l>ret.data = i.data + i.rem;</l> + <l>ret.index = i.index + ((char *) ret.data - (char *) i.data);</l> + <l>ret.rem = 0;</l> + </xsl:otherwise> + </xsl:choose> + <l>return ret;</l> + </function> + </xsl:if> + </xsl:template> + + <!-- Output the results. --> + <xsl:template match="/"> + <xsl:if test="not(function-available('e:node-set'))"> + <xsl:message terminate="yes"><!-- + -->Error: This stylesheet requires the EXSL node-set extension.<!-- + --></xsl:message> + </xsl:if> + + <xsl:if test="not($h) and not($c)"> + <xsl:message terminate="yes"><!-- + -->Error: Parameter "mode" must be "header" or "source".<!-- + --></xsl:message> + </xsl:if> + + <xsl:apply-templates select="$result/*" mode="output" /> + </xsl:template> + + <xsl:template match="xcb" mode="output"> + <xsl:variable name="guard"><!-- + -->__<xsl:value-of select="$ucase-header" />_H<!-- + --></xsl:variable> + +<xsl:text>/* + * This file generated automatically from </xsl:text> +<xsl:value-of select="$header" /><xsl:text>.xml by c-client.xsl using XSLT. + * Edit at your peril. + */ +</xsl:text> + +<xsl:if test="$h"><xsl:text> +#ifndef </xsl:text><xsl:value-of select="$guard" /><xsl:text> +#define </xsl:text><xsl:value-of select="$guard" /><xsl:text> +</xsl:text> +#include "xcb.h" +<xsl:for-each select="$root/xcb/import"> +<xsl:text>#include "</xsl:text><xsl:value-of select="." /><xsl:text>.h" +</xsl:text> +</xsl:for-each> +<xsl:text> +</xsl:text> +</xsl:if> + +<xsl:if test="$c"><xsl:text> +#include <assert.h> +#include "xcbext.h" +#include "</xsl:text><xsl:value-of select="$header" /><xsl:text>.h" + +</xsl:text></xsl:if> + + <xsl:apply-templates mode="output" /> + +<xsl:if test="$h"> +<xsl:text> +#endif +</xsl:text> +</xsl:if> + </xsl:template> + + <xsl:template match="constant" mode="output"> + <xsl:choose> + <xsl:when test="@type = 'number'"> + <xsl:if test="$h"> + <xsl:text>#define </xsl:text> + <xsl:value-of select="@name" /> + <xsl:text> </xsl:text> + <xsl:value-of select="@value" /> + <xsl:text> + +</xsl:text> + </xsl:if> + </xsl:when> + <xsl:when test="@type = 'string'"> + <xsl:if test="$h"> + <xsl:text>extern </xsl:text> + </xsl:if> + <xsl:text>const char </xsl:text> + <xsl:value-of select="@name" /> + <xsl:text>[]</xsl:text> + <xsl:if test="$c"> + <xsl:text> = "</xsl:text> + <xsl:value-of select="@value" /> + <xsl:text>"</xsl:text> + </xsl:if> + <xsl:text>; + +</xsl:text> + </xsl:when> + <xsl:otherwise> + <xsl:if test="$h"> + <xsl:text>extern </xsl:text> + </xsl:if> + <xsl:call-template name="type-and-name" /> + <xsl:if test="$c"> + <xsl:text> = </xsl:text> + <xsl:value-of select="@value" /> + </xsl:if> + <xsl:text>; + +</xsl:text> + </xsl:otherwise> + </xsl:choose> + </xsl:template> + + <xsl:template match="typedef" mode="output"> + <xsl:if test="$h"> + <xsl:text>typedef </xsl:text> + <xsl:value-of select="@oldname" /> + <xsl:text> </xsl:text> + <xsl:value-of select="@newname" /> + <xsl:text>; + +</xsl:text> + </xsl:if> + </xsl:template> + + <xsl:template match="struct" mode="output"> + <xsl:if test="$h"> + <xsl:variable name="type-lengths"> + <xsl:call-template name="type-lengths"> + <xsl:with-param name="items" select="field/@type" /> + </xsl:call-template> + </xsl:variable> + <xsl:text>typedef </xsl:text> + <xsl:if test="not(@kind)">struct</xsl:if><xsl:value-of select="@kind" /> + <xsl:text> { +</xsl:text> + <xsl:for-each select="exprfield|field|list[@fixed]|pad"> + <xsl:text> </xsl:text> + <xsl:apply-templates select="."> + <xsl:with-param name="type-lengths" select="$type-lengths" /> + </xsl:apply-templates> + <xsl:text>; +</xsl:text> + </xsl:for-each> + <xsl:text>} </xsl:text> + <xsl:value-of select="@name" /> + <xsl:text>; + +</xsl:text> + </xsl:if> + </xsl:template> + + <xsl:template match="enum" mode="output"> + <xsl:if test="$h"> + <xsl:text>typedef enum { + </xsl:text> + <xsl:call-template name="list"> + <xsl:with-param name="separator"><xsl:text>, + </xsl:text></xsl:with-param> + <xsl:with-param name="items"> + <xsl:for-each select="item"> + <item> + <xsl:value-of select="@name" /> + <xsl:if test="node()"> <!-- If there is an expression --> + <xsl:text> = </xsl:text> + <xsl:apply-templates mode="output-expression" /> + </xsl:if> + </item> + </xsl:for-each> + </xsl:with-param> + </xsl:call-template> + <xsl:text> +} </xsl:text><xsl:value-of select="@name" /><xsl:text>; + +</xsl:text> + </xsl:if> + </xsl:template> + + <xsl:template match="function" mode="output"> + <xsl:variable name="decl-open" select="concat(@name, ' (')" /> + <xsl:variable name="type-lengths"> + <xsl:call-template name="type-lengths"> + <xsl:with-param name="items" select="field/@type" /> + </xsl:call-template> + </xsl:variable> + <xsl:value-of select="@type" /> + <xsl:text> +</xsl:text> + <xsl:value-of select="$decl-open" /> + <xsl:call-template name="list"> + <xsl:with-param name="separator"> + <xsl:text>, +</xsl:text> + <xsl:call-template name="repeat"> + <xsl:with-param name="count" select="string-length($decl-open)" /> + </xsl:call-template> + </xsl:with-param> + <xsl:with-param name="items"> + <xsl:for-each select="field"> + <item> + <xsl:apply-templates select="."> + <xsl:with-param name="type-lengths" select="$type-lengths" /> + </xsl:apply-templates> + </item> + </xsl:for-each> + </xsl:with-param> + </xsl:call-template> + <xsl:text>)</xsl:text> + + <xsl:if test="$h"><xsl:text>; + +</xsl:text></xsl:if> + + <xsl:if test="$c"> + <xsl:text> +{ +</xsl:text> + <xsl:apply-templates select="l|indent" mode="function-body"> + <xsl:with-param name="indent" select="$indent-string" /> + </xsl:apply-templates> + <xsl:text>} + +</xsl:text> + </xsl:if> + </xsl:template> + + <xsl:template match="l" mode="function-body"> + <xsl:param name="indent" /> + <xsl:value-of select="concat($indent, .)" /><xsl:text> +</xsl:text> + </xsl:template> + + <xsl:template match="indent" mode="function-body"> + <xsl:param name="indent" /> + <xsl:apply-templates select="l|indent" mode="function-body"> + <xsl:with-param name="indent" select="concat($indent, $indent-string)" /> + </xsl:apply-templates> + </xsl:template> + + <xsl:template match="value" mode="output-expression"> + <xsl:value-of select="." /> + </xsl:template> + + <xsl:template match="fieldref" mode="output-expression"> + <xsl:param name="field-prefix" /> + <xsl:value-of select="concat($field-prefix, .)" /> + </xsl:template> + + <xsl:template match="op" mode="output-expression"> + <xsl:param name="field-prefix" /> + <xsl:text>(</xsl:text> + <xsl:apply-templates select="node()[1]" mode="output-expression"> + <xsl:with-param name="field-prefix" select="$field-prefix" /> + </xsl:apply-templates> + <xsl:text> </xsl:text> + <xsl:value-of select="@op" /> + <xsl:text> </xsl:text> + <xsl:apply-templates select="node()[2]" mode="output-expression"> + <xsl:with-param name="field-prefix" select="$field-prefix" /> + </xsl:apply-templates> + <xsl:text>)</xsl:text> + </xsl:template> + + <xsl:template match="function-call" mode="output-expression"> + <xsl:param name="field-prefix" /> + <xsl:value-of select="@name" /> + <xsl:text>(</xsl:text> + <xsl:call-template name="list"> + <xsl:with-param name="separator" select="', '" /> + <xsl:with-param name="items"> + <xsl:for-each select="param"> + <item><xsl:apply-templates mode="output-expression"> + <xsl:with-param name="field-prefix" select="$field-prefix" /> + </xsl:apply-templates></item> + </xsl:for-each> + </xsl:with-param> + </xsl:call-template> + <xsl:text>)</xsl:text> + </xsl:template> + + <!-- Catch invalid elements in expressions. --> + <xsl:template match="*" mode="output-expression"> + <xsl:message terminate="yes"> + <xsl:text>Invalid element in expression: </xsl:text> + <xsl:value-of select="name()" /> + </xsl:message> + </xsl:template> + + <xsl:template match="field|exprfield"> + <xsl:param name="type-lengths" select="0" /> + <xsl:call-template name="type-and-name"> + <xsl:with-param name="type-lengths" select="$type-lengths" /> + </xsl:call-template> + </xsl:template> + + <xsl:template match="list[@fixed]"> + <xsl:param name="type-lengths" select="0" /> + <xsl:call-template name="type-and-name"> + <xsl:with-param name="type-lengths" select="$type-lengths" /> + </xsl:call-template> + <xsl:text>[</xsl:text> + <xsl:apply-templates mode="output-expression" /> + <xsl:text>]</xsl:text> + </xsl:template> + + <xsl:template match="pad"> + <xsl:param name="type-lengths" select="0" /> + + <xsl:variable name="padnum"><xsl:number /></xsl:variable> + + <xsl:call-template name="type-and-name"> + <xsl:with-param name="type" select="'CARD8'" /> + <xsl:with-param name="name"> + <xsl:text>pad</xsl:text> + <xsl:value-of select="$padnum - 1" /> + </xsl:with-param> + <xsl:with-param name="type-lengths" select="$type-lengths" /> + </xsl:call-template> + <xsl:if test="@bytes > 1"> + <xsl:text>[</xsl:text> + <xsl:value-of select="@bytes" /> + <xsl:text>]</xsl:text> + </xsl:if> + </xsl:template> + + <!-- Output the given type and name (defaulting to the corresponding + attributes of the context node), with the appropriate spacing. The + type must consist of a base type (which may contain spaces), then + optionally a single space and a suffix of one or more '*' characters. + If the type-lengths parameter is provided, use it to line up the base + types and suffixs of the type declarations. --> + <xsl:template name="type-and-name"> + <xsl:param name="type" select="@type" /> + <xsl:param name="name" select="@name" /> + <xsl:param name="type-lengths"> + <max-type-length>0</max-type-length> + <max-suffix-length>0</max-suffix-length> + </xsl:param> + + <xsl:variable name="type-lengths-ns" select="e:node-set($type-lengths)" /> + <xsl:variable name="min-type-length" + select="$type-lengths-ns/max-type-length" /> + <xsl:variable name="min-suffix-length" + select="$type-lengths-ns/max-suffix-length" /> + + <xsl:variable name="base-type"> + <xsl:choose> + <xsl:when test="contains($type, ' *')"> + <xsl:value-of select="substring-before($type, ' *')" /> + </xsl:when> + <xsl:otherwise> + <xsl:value-of select="$type" /> + </xsl:otherwise> + </xsl:choose> + </xsl:variable> + <xsl:variable name="suffix"> + <xsl:if test="contains($type, ' *')"> + <xsl:text>*</xsl:text> + <xsl:value-of select="substring-after($type, ' *')" /> + </xsl:if> + </xsl:variable> + + <xsl:value-of select="$base-type" /> + <xsl:if test="string-length($base-type) < $min-type-length"> + <xsl:call-template name="repeat"> + <xsl:with-param name="count" select="$min-type-length + - string-length($base-type)" /> + </xsl:call-template> + </xsl:if> + <xsl:text> </xsl:text> + <xsl:if test="string-length($suffix) < $min-suffix-length"> + <xsl:call-template name="repeat"> + <xsl:with-param name="count" select="$min-suffix-length + - string-length($suffix)" /> + </xsl:call-template> + </xsl:if> + <xsl:value-of select="$suffix" /> + <xsl:value-of select="$name" /> + </xsl:template> + + <!-- Output a list with a given separator. Empty items are skipped. --> + <xsl:template name="list"> + <xsl:param name="separator" /> + <xsl:param name="items" /> + + <xsl:for-each select="e:node-set($items)/*"> + <xsl:value-of select="." /> + <xsl:if test="not(position() = last())"> + <xsl:value-of select="$separator" /> + </xsl:if> + </xsl:for-each> + </xsl:template> + + <!-- Repeat a string (space by default) a given number of times. --> + <xsl:template name="repeat"> + <xsl:param name="str" select="' '" /> + <xsl:param name="count" /> + + <xsl:if test="$count > 0"> + <xsl:value-of select="$str" /> + <xsl:call-template name="repeat"> + <xsl:with-param name="str" select="$str" /> + <xsl:with-param name="count" select="$count - 1" /> + </xsl:call-template> + </xsl:if> + </xsl:template> + + <!-- Record the maximum type lengths of a set of types for use as the + max-type-lengths parameter of type-and-name. --> + <xsl:template name="type-lengths"> + <xsl:param name="items" /> + <xsl:variable name="type-lengths-rtf"> + <xsl:for-each select="$items"> + <item> + <xsl:choose> + <xsl:when test="contains(., ' *')"> + <xsl:value-of select="string-length( + substring-before(., ' *'))" /> + </xsl:when> + <xsl:otherwise> + <xsl:value-of select="string-length(.)" /> + </xsl:otherwise> + </xsl:choose> + </item> + </xsl:for-each> + </xsl:variable> + <xsl:variable name="suffix-lengths-rtf"> + <xsl:for-each select="$items"> + <item> + <xsl:choose> + <xsl:when test="contains(., ' *')"> + <xsl:value-of select="string-length(substring-after(., ' *')) + + 1" /> + </xsl:when> + <xsl:otherwise> + <xsl:text>0</xsl:text> + </xsl:otherwise> + </xsl:choose> + </item> + </xsl:for-each> + </xsl:variable> + <max-type-length> + <xsl:call-template name="max"> + <xsl:with-param name="items" + select="e:node-set($type-lengths-rtf)/*" /> + </xsl:call-template> + </max-type-length> + <max-suffix-length> + <xsl:call-template name="max"> + <xsl:with-param name="items" + select="e:node-set($suffix-lengths-rtf)/*" /> + </xsl:call-template> + </max-suffix-length> + </xsl:template> + + <!-- Return the maximum number in a set of numbers. --> + <xsl:template name="max"> + <xsl:param name="items" /> + <xsl:choose> + <xsl:when test="count($items) = 0"> + <xsl:text>0</xsl:text> + </xsl:when> + <xsl:otherwise> + <xsl:variable name="head" select="number($items[1])" /> + <xsl:variable name="tail-max"> + <xsl:call-template name="max"> + <xsl:with-param name="items" select="$items[position() > 1]" /> + </xsl:call-template> + </xsl:variable> + <xsl:choose> + <xsl:when test="$head > number($tail-max)"> + <xsl:value-of select="$head" /> + </xsl:when> + <xsl:otherwise> + <xsl:value-of select="$tail-max" /> + </xsl:otherwise> + </xsl:choose> + </xsl:otherwise> + </xsl:choose> + </xsl:template> +</xsl:transform> diff --git a/src/xcb.h b/src/xcb.h new file mode 100644 index 0000000..8dd308a --- /dev/null +++ b/src/xcb.h @@ -0,0 +1,165 @@ +/* + * Copyright (C) 2001-2004 Bart Massey, Jamey Sharp, and Josh Triplett. + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + * Except as contained in this notice, the names of the authors or their + * institutions shall not be used in advertising or otherwise to promote the + * sale, use or other dealings in this Software without prior written + * authorization from the authors. + */ + +#ifndef __XCB_H +#define __XCB_H +#include <X11/Xmd.h> +#include <X11/X.h> +#include <sys/uio.h> +#include <pthread.h> + +#ifdef __cplusplus +extern "C" { +#endif + +#if (__GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 1)) +#define deprecated __attribute__((__deprecated__)) +#else +#define deprecated +#endif + +/* Pre-defined constants */ + +/* current protocol version */ +#define X_PROTOCOL 11 + +/* current minor version */ +#define X_PROTOCOL_REVISION 0 + +/* X_TCP_PORT + display number = server port for TCP transport */ +#define X_TCP_PORT 6000 + +#define XCB_TYPE_PAD(T,I) (-(I) & (sizeof(T) > 4 ? 3 : sizeof(T) - 1)) + + +/* Opaque structures */ + +typedef struct XCBConnection XCBConnection; + + +/* Other types */ + +typedef struct { + void *data; + int rem; + int index; +} XCBGenericIter; + +typedef struct { + BYTE response_type; + CARD8 pad0; + CARD16 sequence; + CARD32 length; +} XCBGenericRep; + +typedef struct { + BYTE response_type; + CARD8 pad0; + CARD16 sequence; +} XCBGenericEvent; + +typedef struct { + BYTE response_type; + BYTE error_code; + CARD16 sequence; +} XCBGenericError; + +typedef struct { + unsigned int sequence; +} XCBVoidCookie; + + +/* Include the generated xproto and xcb_types headers. */ +#include "xcb_types.h" +#include "xproto.h" + + +/* xcb_auth.c */ + +typedef struct XCBAuthInfo { + int namelen; + char *name; + int datalen; + char *data; +} XCBAuthInfo; + +int XCBGetAuthInfo(int fd, XCBAuthInfo *info) deprecated; + + +/* xcb_out.c */ + +int XCBFlush(XCBConnection *c); +CARD32 XCBGetMaximumRequestLength(XCBConnection *c); + + +/* xcb_in.c */ + +XCBGenericEvent *XCBWaitEvent(XCBConnection *c) deprecated; +XCBGenericEvent *XCBWaitForEvent(XCBConnection *c); +XCBGenericEvent *XCBPollForEvent(XCBConnection *c, int *error); +unsigned int XCBGetRequestRead(XCBConnection *c); + + +/* xcb_ext.c */ + +typedef struct XCBExtension XCBExtension; + +/* Do not free the returned XCBQueryExtensionRep - on return, it's aliased + * from the cache. */ +const XCBQueryExtensionRep *XCBGetExtensionData(XCBConnection *c, XCBExtension *ext); + +void XCBPrefetchExtensionData(XCBConnection *c, XCBExtension *ext); + + +/* xcb_conn.c */ + +XCBConnSetupSuccessRep *XCBGetSetup(XCBConnection *c); +int XCBGetFileDescriptor(XCBConnection *c); + +XCBConnection *XCBConnectToFD(int fd, XCBAuthInfo *auth_info); +void XCBDisconnect(XCBConnection *c); + + +/* xcb_util.c */ + +int XCBParseDisplay(const char *name, char **host, int *display, int *screen); +int XCBOpen(const char *host, int display) deprecated; +int XCBOpenTCP(const char *host, unsigned short port) deprecated; +int XCBOpenUnix(const char *file) deprecated; + +XCBConnection *XCBConnectBasic(void) deprecated; +XCBConnection *XCBConnect(const char *displayname, int *screenp); +XCBConnection *XCBConnectToDisplayWithAuthInfo(const char *display, XCBAuthInfo *auth, int *screen); + +int XCBSync(XCBConnection *c, XCBGenericError **e); + + +#ifdef __cplusplus +} +#endif + +#endif diff --git a/src/xcb_auth.c b/src/xcb_auth.c new file mode 100644 index 0000000..9f2cb5a --- /dev/null +++ b/src/xcb_auth.c @@ -0,0 +1,296 @@ +/* Copyright (C) 2001-2004 Bart Massey and Jamey Sharp. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + * Except as contained in this notice, the names of the authors or their + * institutions shall not be used in advertising or otherwise to promote the + * sale, use or other dealings in this Software without prior written + * authorization from the authors. + */ + +/* Authorization systems for the X protocol. */ + +#include <assert.h> +#include <X11/Xauth.h> +#include <sys/socket.h> +#include <netinet/in.h> +#include <sys/un.h> +#include <sys/param.h> +#include <unistd.h> +#include <stdlib.h> + +#include "xcb.h" +#include "xcbint.h" + +#ifdef HAS_AUTH_XA1 +#include "xcb_des.h" +#endif + +enum auth_protos { +#ifdef HAS_AUTH_XA1 + AUTH_XA1, +#endif + AUTH_MC1, + N_AUTH_PROTOS +}; + +static char *authnames[N_AUTH_PROTOS] = { +#ifdef HAS_AUTH_XA1 + "XDM-AUTHORIZATION-1", +#endif + "MIT-MAGIC-COOKIE-1", +}; + +#ifdef HAS_AUTH_XA1 + +static int next_nonce(void) +{ + static int nonce = 0; + static pthread_mutex_t nonce_mutex = PTHREAD_MUTEX_INITIALIZER; + int ret; + pthread_mutex_lock(&nonce_mutex); + ret = nonce++; + pthread_mutex_unlock(&nonce_mutex); + return ret; +} + +/* + * This code and the code it calls is taken from libXdmcp, + * specifically from Wrap.c, Wrap.h, and Wraphelp.c. The US + * has changed, thank goodness, and it should be OK to bury + * DES code in an open source product without a maze of + * twisty wrapper functions stored offshore. Or maybe + * not. --Bart Massey 2003/11/5 + */ + +static void +Wrap ( + des_cblock input, + des_cblock key, + des_cblock output, + int bytes) +{ + int i, j; + int len; + des_cblock tmp; + des_cblock expand_key; + des_key_schedule schedule; + + XCBDESKeyToOddParity (key, expand_key); + XCBDESKeySchedule (expand_key, schedule); + for (j = 0; j < bytes; j += 8) + { + len = 8; + if (bytes - j < len) + len = bytes - j; + /* block chaining */ + for (i = 0; i < len; i++) + { + if (j == 0) + tmp[i] = input[i]; + else + tmp[i] = input[j + i] ^ output[j - 8 + i]; + } + for (; i < 8; i++) + { + if (j == 0) + tmp[i] = 0; + else + tmp[i] = 0 ^ output[j - 8 + i]; + } + XCBDESEncrypt (tmp, (output + j), schedule, 1); + } +} + +#endif + +static size_t memdup(char **dst, void *src, size_t len) +{ + if(len) + *dst = malloc(len); + else + *dst = 0; + if(!*dst) + return 0; + memcpy(*dst, src, len); + return len; +} + +static int authname_match(enum auth_protos kind, char *name, int namelen) +{ + if(strlen(authnames[kind]) != namelen) + return 0; + if(memcmp(authnames[kind], name, namelen)) + return 0; + return 1; +} + +static Xauth *get_authptr(struct sockaddr *sockname, unsigned int socknamelen) +{ + char *addr = 0; + int addrlen = 0; + unsigned short family; + char hostnamebuf[256]; /* big enough for max hostname */ + char dispbuf[40]; /* big enough to hold more than 2^64 base 10 */ + char *display; + int authnamelens[N_AUTH_PROTOS]; + int i; + + family = FamilyLocal; /* 256 */ + switch (sockname->sa_family) { + case AF_INET: + /*block*/ { + struct sockaddr_in *si = (struct sockaddr_in *) sockname; + assert(sizeof(*si) == socknamelen); + addr = (char *) &si->sin_addr; + addrlen = 4; + if (ntohl(si->sin_addr.s_addr) != 0x7f000001) + family = FamilyInternet; /* 0 */ + snprintf(dispbuf, sizeof(dispbuf), "%d", ntohs(si->sin_port) - X_TCP_PORT); + display = dispbuf; + } + break; + case AF_UNIX: + /*block*/ { + struct sockaddr_un *su = (struct sockaddr_un *) sockname; + assert(sizeof(*su) >= socknamelen); + display = strrchr(su->sun_path, 'X'); + if (display == 0) + return 0; /* sockname is mangled somehow */ + display++; + } + break; + default: + return 0; /* cannot authenticate this family */ + } + if (family == FamilyLocal) { + if (gethostname(hostnamebuf, sizeof(hostnamebuf)) == -1) + return 0; /* do not know own hostname */ + addr = hostnamebuf; + addrlen = strlen(addr); + } + + for (i = 0; i < N_AUTH_PROTOS; i++) + authnamelens[i] = strlen(authnames[i]); + return XauGetBestAuthByAddr (family, + (unsigned short) addrlen, addr, + (unsigned short) strlen(display), display, + N_AUTH_PROTOS, authnames, authnamelens); +} + +#ifdef HAS_AUTH_XA1 +static void do_append(char *buf, int *idxp, void *val, size_t valsize) { + memcpy(buf + *idxp, val, valsize); + *idxp += valsize; +} +#endif + +static int compute_auth(XCBAuthInfo *info, Xauth *authptr, struct sockaddr *sockname) +{ + if (authname_match(AUTH_MC1, authptr->name, authptr->name_length)) { + info->datalen = memdup(&info->data, authptr->data, authptr->data_length); + if(!info->datalen) + return 0; + return 1; + } +#ifdef HAS_AUTH_XA1 +#define APPEND(buf,idx,val) do_append((buf),&(idx),(val),sizeof(val)) + if (authname_match(AUTH_XA1, authptr->name, authptr->name_length)) { + int j; + + info->data = malloc(192 / 8); + if(!info->data) + return 0; + + for (j = 0; j < 8; j++) + info->data[j] = authptr->data[j]; + switch(sockname->sa_family) { + case AF_INET: + /*block*/ { + struct sockaddr_in *si = (struct sockaddr_in *) sockname; + APPEND(info->data, j, si->sin_addr.s_addr); + APPEND(info->data, j, si->sin_port); + } + break; + case AF_UNIX: + /*block*/ { + long fakeaddr = htonl(0xffffffff - next_nonce()); + short fakeport = htons(getpid()); + APPEND(info->data, j, fakeaddr); + APPEND(info->data, j, fakeport); + } + break; + default: + free(info->data); + return 0; /* do not know how to build this */ + } + { + long now; + time(&now); + now = htonl(now); + APPEND(info->data, j, now); + } + assert(j <= 192 / 8); + while (j < 192 / 8) + info->data[j++] = 0; + info->datalen = j; + Wrap (info->data, authptr->data + 8, info->data, info->datalen); + return 1; + } +#undef APPEND +#endif + + return 0; /* Unknown authorization type */ +} + +int XCBGetAuthInfo(int fd, XCBAuthInfo *info) +{ + /* code adapted from Xlib/ConnDis.c, xtrans/Xtranssocket.c, + xtrans/Xtransutils.c */ + char sockbuf[sizeof(struct sockaddr) + MAXPATHLEN]; + unsigned int socknamelen = sizeof(sockbuf); /* need extra space */ + struct sockaddr *sockname = (struct sockaddr *) &sockbuf; + Xauth *authptr = 0; + int ret = 1; + + /* ensure info has reasonable contents */ + /* XXX This should be removed, but Jamey depends on it + somehow but can't remember how. Principle: don't touch + someone else's data if you're borken. */ + info->namelen = info->datalen = 0; + info->name = info->data = 0; + + if (getpeername(fd, sockname, &socknamelen) == -1) + return 0; /* can only authenticate sockets */ + + authptr = get_authptr(sockname, socknamelen); + if (authptr == 0) + return 0; /* cannot find good auth data */ + + info->namelen = memdup(&info->name, authptr->name, authptr->name_length); + if(info->namelen) + ret = compute_auth(info, authptr, sockname); + if(!ret) + { + free(info->name); + info->name = 0; + info->namelen = 0; + } + XauDisposeAuth(authptr); + return ret; +} diff --git a/src/xcb_conn.c b/src/xcb_conn.c new file mode 100644 index 0000000..0148abf --- /dev/null +++ b/src/xcb_conn.c @@ -0,0 +1,239 @@ +/* Copyright (C) 2001-2004 Bart Massey and Jamey Sharp. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + * Except as contained in this notice, the names of the authors or their + * institutions shall not be used in advertising or otherwise to promote the + * sale, use or other dealings in this Software without prior written + * authorization from the authors. + */ + +/* Connection management: the core of XCB. */ + +#include <assert.h> +#include <string.h> +#include <stdio.h> +#include <unistd.h> +#include <stdlib.h> +#include <netinet/in.h> +#include <sys/select.h> + +#include "xcb.h" +#include "xcbint.h" + +static int write_setup(XCBConnection *c, XCBAuthInfo *auth_info) +{ + XCBConnSetupReq out; + struct iovec parts[3]; + int count = 0; + int endian = 0x01020304; + int ret; + + memset(&out, 0, sizeof(out)); + + /* B = 0x42 = MSB first, l = 0x6c = LSB first */ + if(htonl(endian) == endian) + out.byte_order = 0x42; + else + out.byte_order = 0x6c; + out.protocol_major_version = X_PROTOCOL; + out.protocol_minor_version = X_PROTOCOL_REVISION; + out.authorization_protocol_name_len = 0; + out.authorization_protocol_data_len = 0; + parts[count].iov_len = sizeof(XCBConnSetupReq); + parts[count++].iov_base = &out; + + if(auth_info) + { + parts[count].iov_len = out.authorization_protocol_name_len = auth_info->namelen; + parts[count++].iov_base = auth_info->name; + parts[count].iov_len = out.authorization_protocol_data_len = auth_info->datalen; + parts[count++].iov_base = auth_info->data; + } + + pthread_mutex_lock(&c->iolock); + _xcb_out_write_block(c, parts, count); + ret = _xcb_out_flush(c); + pthread_mutex_unlock(&c->iolock); + if(ret <= 0) + return 0; + return 1; +} + +static int read_setup(XCBConnection *c) +{ + /* Read the server response */ + c->setup = malloc(sizeof(XCBConnSetupGenericRep)); + if(!c->setup) + return 0; + + if(_xcb_read_block(c->fd, c->setup, sizeof(XCBConnSetupGenericRep)) != sizeof(XCBConnSetupGenericRep)) + return 0; + + { + void *tmp = realloc(c->setup, c->setup->length * 4 + sizeof(XCBConnSetupGenericRep)); + if(!tmp) + return 0; + c->setup = tmp; + } + + if(_xcb_read_block(c->fd, (char *) c->setup + sizeof(XCBConnSetupGenericRep), c->setup->length * 4) <= 0) + return 0; + + /* 0 = failed, 2 = authenticate, 1 = success */ + switch(c->setup->status) + { + case 0: /* failed */ + { + XCBConnSetupFailedRep *setup = (XCBConnSetupFailedRep *) c->setup; + write(STDERR_FILENO, XCBConnSetupFailedRepReason(setup), XCBConnSetupFailedRepReasonLength(setup)); + return 0; + } + + case 2: /* authenticate */ + { + XCBConnSetupAuthenticateRep *setup = (XCBConnSetupAuthenticateRep *) c->setup; + write(STDERR_FILENO, XCBConnSetupAuthenticateRepReason(setup), XCBConnSetupAuthenticateRepReasonLength(setup)); + return 0; + } + } + + return 1; +} + +/* Public interface */ + +XCBConnSetupSuccessRep *XCBGetSetup(XCBConnection *c) +{ + /* doesn't need locking because it's never written to. */ + return c->setup; +} + +int XCBGetFileDescriptor(XCBConnection *c) +{ + /* doesn't need locking because it's never written to. */ + return c->fd; +} + +XCBConnection *XCBConnectToFD(int fd, XCBAuthInfo *auth_info) +{ + XCBConnection* c; + + c = calloc(1, sizeof(XCBConnection)); + if(!c) + return 0; + + c->fd = fd; + + if(!( + _xcb_set_fd_flags(fd) && + pthread_mutex_init(&c->iolock, 0) == 0 && + _xcb_in_init(&c->in) && + _xcb_out_init(&c->out) && + write_setup(c, auth_info) && + read_setup(c) && + _xcb_ext_init(c) && + _xcb_xid_init(c) + )) + { + XCBDisconnect(c); + return 0; + } + + return c; +} + +void XCBDisconnect(XCBConnection *c) +{ + if(!c) + return; + + free(c->setup); + close(c->fd); + + pthread_mutex_destroy(&c->iolock); + _xcb_in_destroy(&c->in); + _xcb_out_destroy(&c->out); + + _xcb_ext_destroy(c); + _xcb_xid_destroy(c); + + free(c); +} + +/* Private interface */ + +int _xcb_conn_wait(XCBConnection *c, const int should_write, pthread_cond_t *cond) +{ + int ret = 1; + fd_set rfds, wfds; +#if USE_THREAD_ASSERT + static __thread int already_here = 0; + + assert(!already_here); + ++already_here; +#endif + + _xcb_assert_valid_sequence(c); + + /* If the thing I should be doing is already being done, wait for it. */ + if(should_write ? c->out.writing : c->in.reading) + { + pthread_cond_wait(cond, &c->iolock); +#if USE_THREAD_ASSERT + --already_here; +#endif + return 1; + } + + FD_ZERO(&rfds); + FD_SET(c->fd, &rfds); + ++c->in.reading; + + FD_ZERO(&wfds); + if(should_write) + { + FD_SET(c->fd, &wfds); + ++c->out.writing; + } + + pthread_mutex_unlock(&c->iolock); + ret = select(c->fd + 1, &rfds, &wfds, 0, 0); + pthread_mutex_lock(&c->iolock); + + if(ret <= 0) /* error: select failed */ + goto done; + + if(FD_ISSET(c->fd, &rfds)) + if((ret = _xcb_in_read(c)) <= 0) + goto done; + + if(FD_ISSET(c->fd, &wfds)) + if((ret = _xcb_out_write(c)) <= 0) + goto done; + +done: + if(should_write) + --c->out.writing; + --c->in.reading; + +#if USE_THREAD_ASSERT + --already_here; +#endif + return ret; +} diff --git a/src/xcb_ext.c b/src/xcb_ext.c new file mode 100644 index 0000000..46a5519 --- /dev/null +++ b/src/xcb_ext.c @@ -0,0 +1,122 @@ +/* Copyright (C) 2001-2004 Bart Massey and Jamey Sharp. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + * Except as contained in this notice, the names of the authors or their + * institutions shall not be used in advertising or otherwise to promote the + * sale, use or other dealings in this Software without prior written + * authorization from the authors. + */ + +/* A cache for QueryExtension results. */ + +#include <stdlib.h> +#include <string.h> + +#include "xcb.h" +#include "xcbext.h" +#include "xcbint.h" + +typedef struct { + enum { LAZY_COOKIE, LAZY_FORCED } tag; + union { + XCBQueryExtensionCookie cookie; + XCBQueryExtensionRep *reply; + } value; +} lazyreply; + +static lazyreply *get_lazyreply(XCBConnection *c, XCBExtension *ext) +{ + static pthread_mutex_t global_lock = PTHREAD_MUTEX_INITIALIZER; + static int next_global_id; + + lazyreply *data; + + pthread_mutex_lock(&global_lock); + if(!ext->global_id) + ext->global_id = ++next_global_id; + pthread_mutex_unlock(&global_lock); + + data = _xcb_map_get(c->ext.extensions, ext->global_id); + if(!data) + { + /* cache miss: query the server */ + data = malloc(sizeof(lazyreply)); + if(!data) + return 0; + data->tag = LAZY_COOKIE; + data->value.cookie = XCBQueryExtension(c, strlen(ext->name), ext->name); + _xcb_map_put(c->ext.extensions, ext->global_id, data); + } + return data; +} + +static void free_lazyreply(void *p) +{ + lazyreply *data = p; + if(data->tag == LAZY_FORCED) + free(data->value.reply); + free(data); +} + +/* Public interface */ + +/* Do not free the returned XCBQueryExtensionRep - on return, it's aliased + * from the cache. */ +const XCBQueryExtensionRep *XCBGetExtensionData(XCBConnection *c, XCBExtension *ext) +{ + lazyreply *data; + + pthread_mutex_lock(&c->ext.lock); + data = get_lazyreply(c, ext); + if(data && data->tag == LAZY_COOKIE) + { + data->tag = LAZY_FORCED; + data->value.reply = XCBQueryExtensionReply(c, data->value.cookie, 0); + } + pthread_mutex_unlock(&c->ext.lock); + + return data ? data->value.reply : 0; +} + +void XCBPrefetchExtensionData(XCBConnection *c, XCBExtension *ext) +{ + pthread_mutex_lock(&c->ext.lock); + get_lazyreply(c, ext); + pthread_mutex_unlock(&c->ext.lock); +} + +/* Private interface */ + +int _xcb_ext_init(XCBConnection *c) +{ + if(pthread_mutex_init(&c->ext.lock, 0)) + return 0; + + c->ext.extensions = _xcb_map_new(); + if(!c->ext.extensions) + return 0; + + return 1; +} + +void _xcb_ext_destroy(XCBConnection *c) +{ + pthread_mutex_destroy(&c->ext.lock); + _xcb_map_delete(c->ext.extensions, free_lazyreply); +} diff --git a/src/xcb_in.c b/src/xcb_in.c new file mode 100644 index 0000000..c260b7b --- /dev/null +++ b/src/xcb_in.c @@ -0,0 +1,319 @@ +/* Copyright (C) 2001-2004 Bart Massey and Jamey Sharp. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + * Except as contained in this notice, the names of the authors or their + * institutions shall not be used in advertising or otherwise to promote the + * sale, use or other dealings in this Software without prior written + * authorization from the authors. + */ + +/* Stuff that reads stuff from the server. */ + +#include <assert.h> +#include <string.h> +#include <stdlib.h> +#include <stdio.h> +#include <errno.h> + +#include "xcb.h" +#include "xcbext.h" +#include "xcbint.h" + +typedef struct XCBReplyData { + unsigned int request; + void *data; + XCBGenericError **error; +} XCBReplyData; + +static int match_request_error(const void *request, const void *data) +{ + const XCBGenericError *e = data; + return e->response_type == 0 && e->sequence == ((*(unsigned int *) request) & 0xffff); +} + +static int match_reply(const void *request, const void *data) +{ + return ((XCBReplyData *) data)->request == *(unsigned int *) request; +} + +static void wake_up_next_reader(XCBConnection *c) +{ + XCBReplyData *cur = _xcb_list_peek_head(c->in.readers); + int pthreadret; + if(cur) + pthreadret = pthread_cond_signal(cur->data); + else + pthreadret = pthread_cond_signal(&c->in.event_cond); + assert(pthreadret == 0); +} + +/* Public interface */ + +void *XCBWaitForReply(XCBConnection *c, unsigned int request, XCBGenericError **e) +{ + pthread_cond_t cond = PTHREAD_COND_INITIALIZER; + XCBReplyData reader; + void *ret = 0; + if(e) + *e = 0; + + pthread_mutex_lock(&c->iolock); + + /* If this request has not been written yet, write it. */ + if((signed int) (c->out.request_written - request) < 0) + if(_xcb_out_flush(c) <= 0) + goto done; /* error */ + + if(_xcb_list_find(c->in.readers, match_reply, &request)) + goto done; /* error */ + + if(e) + { + *e = _xcb_list_remove(c->in.events, match_request_error, &request); + if(*e) + goto done; + } + + reader.request = request; + reader.data = &cond; + reader.error = e; + _xcb_list_append(c->in.readers, &reader); + + /* If this request has not been read yet, wait for it. */ + while(!(e && *e) && ((signed int) (c->in.request_read - request) < 0 || + (c->in.request_read == request && + _xcb_queue_is_empty(c->in.current_reply)))) + if(_xcb_conn_wait(c, /*should_write*/ 0, &cond) <= 0) + goto done; + + if(c->in.request_read != request) + { + _xcb_queue *q = _xcb_map_get(c->in.replies, request); + if(q) + { + ret = _xcb_queue_dequeue(q); + if(_xcb_queue_is_empty(q)) + _xcb_queue_delete(_xcb_map_remove(c->in.replies, request), free); + } + } + else + ret = _xcb_queue_dequeue(c->in.current_reply); + +done: + _xcb_list_remove(c->in.readers, match_reply, &request); + pthread_cond_destroy(&cond); + + wake_up_next_reader(c); + pthread_mutex_unlock(&c->iolock); + return ret; +} + +XCBGenericEvent *XCBWaitEvent(XCBConnection *c) +{ + return XCBWaitForEvent(c); +} + +XCBGenericEvent *XCBWaitForEvent(XCBConnection *c) +{ + XCBGenericEvent *ret; + +#if XCBTRACEEVENT + fprintf(stderr, "Entering XCBWaitEvent\n"); +#endif + + pthread_mutex_lock(&c->iolock); + /* _xcb_list_remove_head returns 0 on empty list. */ + while(!(ret = _xcb_queue_dequeue(c->in.events))) + if(_xcb_conn_wait(c, /*should_write*/ 0, &c->in.event_cond) <= 0) + break; + + wake_up_next_reader(c); + pthread_mutex_unlock(&c->iolock); + +#if XCBTRACEEVENT + fprintf(stderr, "Leaving XCBWaitEvent, event type %d\n", ret ? ret->response_type : -1); +#endif + + return ret; +} + +XCBGenericEvent *XCBPollForEvent(XCBConnection *c, int *error) +{ + XCBGenericEvent *ret = 0; + pthread_mutex_lock(&c->iolock); + if(error) + *error = 0; + /* FIXME: follow X meets Z architecture changes. */ + if(_xcb_in_read(c) >= 0) + ret = _xcb_queue_dequeue(c->in.events); + else if(error) + *error = -1; + else + { + fprintf(stderr, "XCBPollForEvent: I/O error occured, but no handler provided.\n"); + abort(); + } + pthread_mutex_unlock(&c->iolock); + return ret; +} + +unsigned int XCBGetRequestRead(XCBConnection *c) +{ + unsigned int ret; + pthread_mutex_lock(&c->iolock); + /* FIXME: follow X meets Z architecture changes. */ + _xcb_in_read(c); + ret = c->in.request_read; + pthread_mutex_unlock(&c->iolock); + return ret; +} + +/* Private interface */ + +int _xcb_in_init(_xcb_in *in) +{ + if(pthread_cond_init(&in->event_cond, 0)) + return 0; + in->reading = 0; + + in->queue_len = 0; + + in->request_read = 0; + in->current_reply = _xcb_queue_new(); + + in->replies = _xcb_map_new(); + in->events = _xcb_queue_new(); + in->readers = _xcb_list_new(); + if(!in->current_reply || !in->replies || !in->events || !in->readers) + return 0; + + return 1; +} + +void _xcb_in_destroy(_xcb_in *in) +{ + pthread_cond_destroy(&in->event_cond); + _xcb_queue_delete(in->current_reply, free); + _xcb_map_delete(in->replies, free); + _xcb_queue_delete(in->events, free); + _xcb_list_delete(in->readers, 0); +} + +int _xcb_in_expect_reply(XCBConnection *c, unsigned int request) +{ + /* XXX: currently a no-op */ + return 1; +} + +int _xcb_in_read_packet(XCBConnection *c) +{ + XCBGenericRep genrep; + int length = 32; + unsigned char *buf; + + /* Wait for there to be enough data for us to read a whole packet */ + if(c->in.queue_len < length) + return 0; + + /* Get the response type, length, and sequence number. */ + memcpy(&genrep, c->in.queue, sizeof(genrep)); + + /* For reply packets, check that the entire packet is available. */ + if(genrep.response_type == 1) + length += genrep.length * 4; + + buf = malloc(length); + if(!buf) + return 0; + if(_xcb_in_read_block(c, buf, length) <= 0) + { + free(buf); + return 0; + } + + /* Compute 32-bit sequence number of this packet. */ + /* XXX: do "sequence lost" check here */ + if((genrep.response_type & 0x7f) != KeymapNotify) + { + int lastread = c->in.request_read; + c->in.request_read = (lastread & 0xffff0000) | genrep.sequence; + if(c->in.request_read != lastread && !_xcb_queue_is_empty(c->in.current_reply)) + { + _xcb_map_put(c->in.replies, lastread, c->in.current_reply); + c->in.current_reply = _xcb_queue_new(); + } + if(c->in.request_read < lastread) + c->in.request_read += 0x10000; + } + + if(buf[0] == 1) /* response is a reply */ + { + XCBReplyData *reader = _xcb_list_find(c->in.readers, match_reply, &c->in.request_read); + _xcb_queue_enqueue(c->in.current_reply, buf); + if(reader) + pthread_cond_signal(reader->data); + return 1; + } + + if(buf[0] == 0) /* response is an error */ + { + XCBReplyData *reader = _xcb_list_find(c->in.readers, match_reply, &c->in.request_read); + if(reader && reader->error) + { + *reader->error = (XCBGenericError *) buf; + pthread_cond_signal(reader->data); + return 1; + } + } + + /* event, or error without a waiting reader */ + _xcb_queue_enqueue(c->in.events, buf); + pthread_cond_signal(&c->in.event_cond); + return 1; /* I have something for you... */ +} + +int _xcb_in_read(XCBConnection *c) +{ + int n = _xcb_readn(c->fd, c->in.queue, sizeof(c->in.queue), &c->in.queue_len); + if(n < 0 && errno == EAGAIN) + n = 1; + while(_xcb_in_read_packet(c) > 0) + /* empty */; + return n; +} + +int _xcb_in_read_block(XCBConnection *c, void *buf, int len) +{ + int done = c->in.queue_len; + if(len < done) + done = len; + + memcpy(buf, c->in.queue, done); + c->in.queue_len -= done; + memmove(c->in.queue, c->in.queue + done, c->in.queue_len); + + if(len > done) + { + int ret = _xcb_read_block(c->fd, (char *) buf + done, len - done); + if(ret <= 0) + return ret; + } + + return len; +} diff --git a/src/xcb_list.c b/src/xcb_list.c new file mode 100644 index 0000000..5b2edc0 --- /dev/null +++ b/src/xcb_list.c @@ -0,0 +1,215 @@ +/* Copyright (C) 2001-2004 Bart Massey and Jamey Sharp. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + * Except as contained in this notice, the names of the authors or their + * institutions shall not be used in advertising or otherwise to promote the + * sale, use or other dealings in this Software without prior written + * authorization from the authors. + */ + +/* A generic implementation of a list of void-pointers. */ + +#include <stdlib.h> + +#include "xcb.h" +#include "xcbint.h" + +typedef struct node { + struct node *next; + void *data; +} node; + +struct _xcb_list { + node *head; + node **tail; +}; + +/* Private interface */ + +_xcb_list *_xcb_list_new() +{ + _xcb_list *list; + list = malloc(sizeof(_xcb_list)); + if(!list) + return 0; + list->head = 0; + list->tail = &list->head; + return list; +} + +static void _xcb_list_clear(_xcb_list *list, XCBListFreeFunc do_free) +{ + void *tmp; + while((tmp = _xcb_list_remove_head(list))) + if(do_free) + do_free(tmp); +} + +void _xcb_list_delete(_xcb_list *list, XCBListFreeFunc do_free) +{ + if(!list) + return; + _xcb_list_clear(list, do_free); + free(list); +} + +int _xcb_list_insert(_xcb_list *list, void *data) +{ + node *cur; + cur = malloc(sizeof(node)); + if(!cur) + return 0; + cur->data = data; + + cur->next = list->head; + list->head = cur; + return 1; +} + +int _xcb_list_append(_xcb_list *list, void *data) +{ + node *cur; + cur = malloc(sizeof(node)); + if(!cur) + return 0; + cur->data = data; + cur->next = 0; + + *list->tail = cur; + list->tail = &cur->next; + return 1; +} + +void *_xcb_list_peek_head(_xcb_list *list) +{ + if(!list->head) + return 0; + return list->head->data; +} + +void *_xcb_list_remove_head(_xcb_list *list) +{ + void *ret; + node *tmp = list->head; + if(!tmp) + return 0; + ret = tmp->data; + list->head = tmp->next; + if(!list->head) + list->tail = &list->head; + free(tmp); + return ret; +} + +void *_xcb_list_remove(_xcb_list *list, int (*cmp)(const void *, const void *), const void *data) +{ + node **cur; + for(cur = &list->head; *cur; cur = &(*cur)->next) + if(cmp(data, (*cur)->data)) + { + node *tmp = *cur; + void *ret = (*cur)->data; + *cur = (*cur)->next; + if(!*cur) + list->tail = cur; + + free(tmp); + return ret; + } + return 0; +} + +void *_xcb_list_find(_xcb_list *list, int (*cmp)(const void *, const void *), const void *data) +{ + node *cur; + for(cur = list->head; cur; cur = cur->next) + if(cmp(data, cur->data)) + return cur->data; + return 0; +} + +_xcb_queue *_xcb_queue_new(void) __attribute__ ((alias ("_xcb_list_new"))); +void _xcb_queue_delete(_xcb_queue *q, XCBListFreeFunc do_free) __attribute__ ((alias ("_xcb_list_delete"))); +int _xcb_queue_enqueue(_xcb_queue *q, void *data) __attribute__ ((alias ("_xcb_list_append"))); +void *_xcb_queue_dequeue(_xcb_queue *q) __attribute__ ((alias ("_xcb_list_remove_head"))); + +int _xcb_queue_is_empty(_xcb_queue *q) +{ + return q->head == 0; +} + +typedef struct { + unsigned int key; + void *value; +} map_pair; + +_xcb_map *_xcb_map_new(void) __attribute__ ((alias ("_xcb_list_new"))); + +void _xcb_map_delete(_xcb_map *q, XCBListFreeFunc do_free) +{ + map_pair *tmp; + if(!q) + return; + while((tmp = _xcb_list_remove_head(q))) + { + if(do_free) + do_free(tmp->value); + free(tmp); + } + free(q); +} + +int _xcb_map_put(_xcb_map *q, unsigned int key, void *data) +{ + map_pair *cur = malloc(sizeof(map_pair)); + if(!cur) + return 0; + cur->key = key; + cur->value = data; + if(!_xcb_list_append(q, cur)) + { + free(cur); + return 0; + } + return 1; +} + +static int match_map_pair(const void *key, const void *pair) +{ + return ((map_pair *) pair)->key == *(unsigned int *) key; +} + +void *_xcb_map_get(_xcb_map *q, unsigned int key) +{ + map_pair *cur = _xcb_list_find(q, match_map_pair, &key); + if(!cur) + return 0; + return cur->value; +} + +void *_xcb_map_remove(_xcb_map *q, unsigned int key) +{ + map_pair *cur = _xcb_list_remove(q, match_map_pair, &key); + void *ret; + if(!cur) + return 0; + ret = cur->value; + free(cur); + return ret; +} diff --git a/src/xcb_out.c b/src/xcb_out.c new file mode 100644 index 0000000..b3a556a --- /dev/null +++ b/src/xcb_out.c @@ -0,0 +1,272 @@ +/* Copyright (C) 2001-2004 Bart Massey and Jamey Sharp. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + * Except as contained in this notice, the names of the authors or their + * institutions shall not be used in advertising or otherwise to promote the + * sale, use or other dealings in this Software without prior written + * authorization from the authors. + */ + +/* Stuff that sends stuff to the server. */ + +#include <assert.h> +#include <stdlib.h> +#include <string.h> +#include <errno.h> + +#include "xcb.h" +#include "xcbext.h" +#include "xcbint.h" +#include "extensions/bigreq.h" + +static int force_sequence_wrap(XCBConnection *c) +{ + int ret = 1; + if((c->out.request - c->in.request_read) > 65530) + { + pthread_mutex_unlock(&c->iolock); + ret = XCBSync(c, 0); + pthread_mutex_lock(&c->iolock); + } + return ret; +} + +/* Public interface */ + +CARD32 XCBGetMaximumRequestLength(XCBConnection *c) +{ + pthread_mutex_lock(&c->out.reqlenlock); + if(!c->out.maximum_request_length) + { + const XCBQueryExtensionRep *ext; + c->out.maximum_request_length = c->setup->maximum_request_length; + ext = XCBGetExtensionData(c, &XCBBigRequestsId); + if(ext && ext->present) + { + XCBBigRequestsEnableRep *r = XCBBigRequestsEnableReply(c, XCBBigRequestsEnable(c), 0); + c->out.maximum_request_length = r->maximum_request_length; + free(r); + } + } + pthread_mutex_unlock(&c->out.reqlenlock); + return c->out.maximum_request_length; +} + +int XCBSendRequest(XCBConnection *c, unsigned int *request, struct iovec *vector, const XCBProtocolRequest *req) +{ + int ret; + int i; + struct iovec prefix[2]; + CARD16 shortlen = 0; + CARD32 longlen = 0; + + assert(c != 0); + assert(request != 0); + assert(vector != 0); + assert(req->count > 0); + + /* put together the length field, possibly using BIGREQUESTS */ + for(i = 0; i < req->count; ++i) + longlen += XCB_CEIL(vector[i].iov_len) >> 2; + + if(longlen > c->setup->maximum_request_length) + { + if(longlen > XCBGetMaximumRequestLength(c)) + return 0; /* server can't take this; maybe need BIGREQUESTS? */ + } + else + { + /* we don't need BIGREQUESTS. */ + shortlen = longlen; + longlen = 0; + } + + /* set the length field. */ + i = 0; + prefix[i].iov_base = vector[0].iov_base; + prefix[i].iov_len = sizeof(CARD32); + vector[0].iov_base = ((char *) vector[0].iov_base) + sizeof(CARD32); + vector[0].iov_len -= sizeof(CARD32); + ((CARD16 *) prefix[i].iov_base)[1] = shortlen; + ++i; + if(!shortlen) + { + ++longlen; + prefix[i].iov_base = &longlen; + prefix[i].iov_len = sizeof(CARD32); + ++i; + } + + /* set the major opcode, and the minor opcode for extensions */ + if(req->ext) + { + const XCBQueryExtensionRep *extension = XCBGetExtensionData(c, req->ext); + /* TODO: better error handling here, please! */ + assert(extension && extension->present); + ((CARD8 *) prefix[0].iov_base)[0] = extension->major_opcode; + ((CARD8 *) prefix[0].iov_base)[1] = req->opcode; + } + else + ((CARD8 *) prefix[0].iov_base)[0] = req->opcode; + + /* get a sequence number and arrange for delivery. */ + pthread_mutex_lock(&c->iolock); + if(req->isvoid && !force_sequence_wrap(c)) + { + pthread_mutex_unlock(&c->iolock); + return -1; + } + + *request = ++c->out.request; + + if(!req->isvoid) + _xcb_in_expect_reply(c, *request); + + ret = _xcb_out_write_block(c, prefix, i); + if(ret > 0) + ret = _xcb_out_write_block(c, vector, req->count); + pthread_mutex_unlock(&c->iolock); + + return ret; +} + +int XCBFlush(XCBConnection *c) +{ + int ret; + pthread_mutex_lock(&c->iolock); + ret = _xcb_out_flush(c); + pthread_mutex_unlock(&c->iolock); + return ret; +} + +/* Private interface */ + +int _xcb_out_init(_xcb_out *out) +{ + if(pthread_cond_init(&out->cond, 0)) + return 0; + out->writing = 0; + + out->queue_len = 0; + out->vec = 0; + out->vec_len = 0; + + out->last_request = 0; + out->request = 0; + out->request_written = 0; + + if(pthread_mutex_init(&out->reqlenlock, 0)) + return 0; + out->maximum_request_length = 0; + + return 1; +} + +void _xcb_out_destroy(_xcb_out *out) +{ + pthread_cond_destroy(&out->cond); + pthread_mutex_destroy(&out->reqlenlock); + free(out->vec); +} + +int _xcb_out_write(XCBConnection *c) +{ + int n; + if(c->out.vec_len) + n = _xcb_writev(c->fd, c->out.vec, c->out.vec_len); + else + n = _xcb_write(c->fd, &c->out.queue, &c->out.queue_len); + + if(n < 0 && errno == EAGAIN) + n = 1; + + if(c->out.vec_len) + { + int i; + for(i = 0; i < c->out.vec_len; ++i) + if(c->out.vec[i].iov_len) + return n; + c->out.vec_len = 0; + } + return n; +} + +int _xcb_out_write_block(XCBConnection *c, struct iovec *vector, size_t count) +{ + static const char pad[3]; + int i; + int len = 0; + + for(i = 0; i < count; ++i) + len += XCB_CEIL(vector[i].iov_len); + + /* Is the queue about to overflow? */ + if(c->out.queue_len + len < sizeof(c->out.queue)) + { + /* No, this will fit. */ + for(i = 0; i < count; ++i) + { + memcpy(c->out.queue + c->out.queue_len, vector[i].iov_base, vector[i].iov_len); + if(vector[i].iov_len & 3) + memset(c->out.queue + c->out.queue_len + vector[i].iov_len, 0, XCB_PAD(vector[i].iov_len)); + c->out.queue_len += XCB_CEIL(vector[i].iov_len); + } + return len; + } + + assert(!c->out.vec_len); + assert(!c->out.vec); + c->out.vec = malloc(sizeof(struct iovec) * (1 + count * 2)); + if(!c->out.vec) + return -1; + if(c->out.queue_len) + { + c->out.vec[c->out.vec_len].iov_base = c->out.queue; + c->out.vec[c->out.vec_len++].iov_len = c->out.queue_len; + c->out.queue_len = 0; + } + for(i = 0; i < count; ++i) + { + if(!vector[i].iov_len) + continue; + c->out.vec[c->out.vec_len].iov_base = vector[i].iov_base; + c->out.vec[c->out.vec_len++].iov_len = vector[i].iov_len; + if(!XCB_PAD(vector[i].iov_len)) + continue; + c->out.vec[c->out.vec_len].iov_base = (void *) pad; + c->out.vec[c->out.vec_len++].iov_len = XCB_PAD(vector[i].iov_len); + } + if(_xcb_out_flush(c) <= 0) + len = -1; + free(c->out.vec); + c->out.vec = 0; + + return len; +} + +int _xcb_out_flush(XCBConnection *c) +{ + int ret = 1; + while(ret > 0 && (c->out.queue_len || c->out.vec_len)) + ret = _xcb_conn_wait(c, /*should_write*/ 1, &c->out.cond); + c->out.last_request = 0; + c->out.request_written = c->out.request; + pthread_cond_broadcast(&c->out.cond); + return ret; +} diff --git a/src/xcb_util.c b/src/xcb_util.c new file mode 100644 index 0000000..b25a2d8 --- /dev/null +++ b/src/xcb_util.c @@ -0,0 +1,279 @@ +/* Copyright (C) 2001-2004 Bart Massey and Jamey Sharp. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + * Except as contained in this notice, the names of the authors or their + * institutions shall not be used in advertising or otherwise to promote the + * sale, use or other dealings in this Software without prior written + * authorization from the authors. + */ + +/* Utility functions implementable using only public APIs. */ + +#include <assert.h> +#include <sys/select.h> +#include <sys/socket.h> +#include <sys/fcntl.h> +#include <sys/un.h> +#include <netinet/in.h> +#include <netdb.h> +#include <errno.h> +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <string.h> + +#include "xcb.h" +#include "xcbext.h" + +int XCBPopcount(CARD32 mask) +{ + unsigned long y; + y = (mask >> 1) & 033333333333; + y = mask - y - ((y >> 1) & 033333333333); + return ((y + (y >> 3)) & 030707070707) % 077; +} + +int XCBParseDisplay(const char *name, char **host, int *displayp, int *screenp) +{ + int len, display, screen; + char *colon, *dot, *end; + if(!name || !*name) + name = getenv("DISPLAY"); + if(!name) + return 0; + colon = strrchr(name, ':'); + if(!colon) + return 0; + len = colon - name; + ++colon; + display = strtoul(colon, &dot, 10); + if(dot == colon) + return 0; + if(*dot == '\0') + screen = 0; + else + { + if(*dot != '.') + return 0; + ++dot; + screen = strtoul(dot, &end, 10); + if(end == dot || *end != '\0') + return 0; + } + /* At this point, the display string is fully parsed and valid, but + * the caller's memory is untouched. */ + + *host = malloc(len + 1); + if(!*host) + return 0; + memcpy(*host, name, len); + (*host)[len] = '\0'; + *displayp = display; + if(screenp) + *screenp = screen; + return 1; +} + +int XCBOpen(const char *host, const int display) +{ + int fd; + + if(*host) + { + /* display specifies TCP */ + unsigned short port = X_TCP_PORT + display; + fd = XCBOpenTCP(host, port); + } + else + { + /* display specifies Unix socket */ + static const char base[] = "/tmp/.X11-unix/X"; + char file[sizeof(base) + 20]; + snprintf(file, sizeof(file), "%s%d", base, display); + fd = XCBOpenUnix(file); + } + + return fd; +} + +int XCBOpenTCP(const char *host, const unsigned short port) +{ + int fd; + struct sockaddr_in addr; + struct hostent *hostaddr = gethostbyname(host); + if(!hostaddr) + return -1; + addr.sin_family = AF_INET; + addr.sin_port = htons(port); + memcpy(&addr.sin_addr, hostaddr->h_addr_list[0], sizeof(addr.sin_addr)); + + fd = socket(PF_INET, SOCK_STREAM, 0); + if(fd == -1) + return -1; + if(connect(fd, (struct sockaddr *) &addr, sizeof(addr)) == -1) + return -1; + return fd; +} + +int XCBOpenUnix(const char *file) +{ + int fd; + struct sockaddr_un addr = { AF_UNIX }; + strcpy(addr.sun_path, file); + + fd = socket(AF_UNIX, SOCK_STREAM, 0); + if(fd == -1) + return -1; + if(connect(fd, (struct sockaddr *) &addr, sizeof(addr)) == -1) + return -1; + return fd; +} + +XCBConnection *XCBConnect(const char *displayname, int *screenp) +{ + int fd, display = 0; + char *host; + XCBConnection *c; + XCBAuthInfo auth; + + if(!XCBParseDisplay(displayname, &host, &display, screenp)) + return 0; + fd = XCBOpen(host, display); + free(host); + if(fd == -1) + return 0; + + XCBGetAuthInfo(fd, &auth); + c = XCBConnectToFD(fd, &auth); + free(auth.name); + free(auth.data); + return c; +} + +XCBConnection *XCBConnectToDisplayWithAuthInfo(const char *displayname, XCBAuthInfo *auth, int *screenp) +{ + int fd, display = 0; + char *host; + + if(!XCBParseDisplay(displayname, &host, &display, screenp)) + return 0; + fd = XCBOpen(host, display); + free(host); + if(fd == -1) + return 0; + + return XCBConnectToFD(fd, auth); +} + +/* backwards compatible interface: remove before 1.0 release */ +XCBConnection *XCBConnectBasic() +{ + XCBConnection *c = XCBConnect(0, 0); + if(c) + return c; + perror("XCBConnect"); + abort(); +} + +int XCBSync(XCBConnection *c, XCBGenericError **e) +{ + XCBGetInputFocusRep *reply = XCBGetInputFocusReply(c, XCBGetInputFocus(c), e); + free(reply); + return reply != 0; +} + +/* The functions beyond this point still use only public interfaces, + * but are not themselves part of the public interface. So their + * prototypes are in xcbint.h. */ + +#include "xcbint.h" + +int _xcb_set_fd_flags(const int fd) +{ + long flags = fcntl(fd, F_GETFL, 0); + if(flags == -1) + return 0; + flags |= O_NONBLOCK; + if(fcntl(fd, F_SETFL, flags) == -1) + return 0; + if(fcntl(fd, F_SETFD, FD_CLOEXEC) == -1) + return 0; + return 1; +} + +int _xcb_readn(const int fd, void *buf, const int buflen, int *count) +{ + int n = read(fd, ((char *) buf) + *count, buflen - *count); + if(n > 0) + *count += n; + return n; +} + +int _xcb_read_block(const int fd, void *buf, const size_t len) +{ + int done = 0; + while(done < len) + { + int ret = _xcb_readn(fd, buf, len, &done); + if(ret < 0 && errno == EAGAIN) + { + fd_set fds; + FD_ZERO(&fds); + FD_SET(fd, &fds); + ret = select(fd + 1, &fds, 0, 0, 0); + } + if(ret <= 0) + return ret; + } + return len; +} + +int _xcb_write(const int fd, char (*buf)[], int *count) +{ + int n = write(fd, *buf, *count); + if(n > 0) + { + *count -= n; + if(*count) + memmove(*buf, *buf + n, *count); + } + return n; +} + +int _xcb_writev(const int fd, struct iovec *vec, int count) +{ + int n = writev(fd, vec, count); + if(n > 0) + { + int rem = n; + for(; count; --count, ++vec) + { + int cur = vec->iov_len; + if(cur > rem) + cur = rem; + vec->iov_len -= cur; + vec->iov_base = (char *) vec->iov_base + cur; + rem -= cur; + if(vec->iov_len) + break; + } + assert(rem == 0); + } + return n; +} diff --git a/src/xcb_xid.c b/src/xcb_xid.c new file mode 100644 index 0000000..7d7f784 --- /dev/null +++ b/src/xcb_xid.c @@ -0,0 +1,70 @@ +/* Copyright (C) 2001-2004 Bart Massey and Jamey Sharp. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + * Except as contained in this notice, the names of the authors or their + * institutions shall not be used in advertising or otherwise to promote the + * sale, use or other dealings in this Software without prior written + * authorization from the authors. + */ + +/* XID allocators. */ + +#include <stdlib.h> +#include "xcb.h" +#include "xcbext.h" +#include "xcbint.h" +#include "extensions/xc_misc.h" + +/* Public interface */ + +CARD32 XCBGenerateID(XCBConnection *c) +{ + CARD32 ret; + pthread_mutex_lock(&c->xid.lock); + if(c->xid.last == c->xid.max) + { + XCBXCMiscGetXIDRangeRep *range; + range = XCBXCMiscGetXIDRangeReply(c, XCBXCMiscGetXIDRange(c), 0); + c->xid.last = range->start_id; + c->xid.max = range->start_id + (range->count - 1) * c->xid.inc; + free(range); + } + ret = c->xid.last | c->xid.base; + c->xid.last += c->xid.inc; + pthread_mutex_unlock(&c->xid.lock); + return ret; +} + +/* Private interface */ + +int _xcb_xid_init(XCBConnection *c) +{ + if(pthread_mutex_init(&c->xid.lock, 0)) + return 0; + c->xid.last = 0; + c->xid.base = c->setup->resource_id_base; + c->xid.max = c->setup->resource_id_mask; + c->xid.inc = c->setup->resource_id_mask & -(c->setup->resource_id_mask); + return 1; +} + +void _xcb_xid_destroy(XCBConnection *c) +{ + pthread_mutex_destroy(&c->xid.lock); +} diff --git a/src/xcb_xlib.c b/src/xcb_xlib.c new file mode 100644 index 0000000..8cc6837 --- /dev/null +++ b/src/xcb_xlib.c @@ -0,0 +1,41 @@ +/* Copyright (C) 2005 Bart Massey and Jamey Sharp. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + * Except as contained in this notice, the names of the authors or their + * institutions shall not be used in advertising or otherwise to promote the + * sale, use or other dealings in this Software without prior written + * authorization from the authors. + */ + +#include "xcbxlib.h" +#include "xcbint.h" + +unsigned int XCBGetRequestSent(XCBConnection *c) +{ + unsigned int ret; + pthread_mutex_lock(&c->iolock); + ret = c->out.request; + pthread_mutex_unlock(&c->iolock); + return ret; +} + +pthread_mutex_t *XCBGetIOLock(XCBConnection *c) +{ + return &c->iolock; +} diff --git a/src/xcbext.h b/src/xcbext.h new file mode 100644 index 0000000..c8f532c --- /dev/null +++ b/src/xcbext.h @@ -0,0 +1,75 @@ +/* + * Copyright (C) 2001-2004 Bart Massey and Jamey Sharp. + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + * Except as contained in this notice, the names of the authors or their + * institutions shall not be used in advertising or otherwise to promote the + * sale, use or other dealings in this Software without prior written + * authorization from the authors. + */ + +#ifndef __XCBEXT_H +#define __XCBEXT_H + +#include "xcb.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/* xcb_ext.c */ + +struct XCBExtension { + const char *name; + int global_id; +}; + + +/* xcb_out.c */ + +typedef struct { + size_t count; + XCBExtension *ext; + CARD8 opcode; + BOOL isvoid; +} XCBProtocolRequest; + +int XCBSendRequest(XCBConnection *c, unsigned int *sequence, struct iovec *vector, const XCBProtocolRequest *request); + + +/* xcb_in.c */ + +void *XCBWaitForReply(XCBConnection *c, unsigned int request, XCBGenericError **e); + + +/* xcb_xid.c */ + +CARD32 XCBGenerateID(XCBConnection *c); + + +/* xcb_util.c */ + +int XCBPopcount(CARD32 mask); + +#ifdef __cplusplus +} +#endif + +#endif diff --git a/src/xcbint.h b/src/xcbint.h new file mode 100644 index 0000000..057a315 --- /dev/null +++ b/src/xcbint.h @@ -0,0 +1,183 @@ +/* + * Copyright (C) 2001-2004 Bart Massey and Jamey Sharp. + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + * Except as contained in this notice, the names of the authors or their + * institutions shall not be used in advertising or otherwise to promote the + * sale, use or other dealings in this Software without prior written + * authorization from the authors. + */ + +#ifndef __XCBINT_H +#define __XCBINT_H + +/* Not simply (a <= b) because eventually the 32-bit sequence number + * will wrap, causing earlier sequence numbers to be higher than later + * ones for a brief but fatal period. (a and b must be unsigned.) */ +#define _xcb_assert_sequence_less(a,b) assert((b) - (a) < 65536) + +#define _xcb_assert_valid_sequence(c) do { \ + _xcb_assert_sequence_less((c)->in.request_read, (c)->out.request_written); \ + _xcb_assert_sequence_less((c)->out.request_written, (c)->out.request); \ +} while(0) + +/* xcb_list.c */ + +typedef struct _xcb_list _xcb_list; +typedef void (*XCBListFreeFunc)(void *); + +_xcb_list *_xcb_list_new(void); +void _xcb_list_delete(_xcb_list *list, XCBListFreeFunc do_free); +int _xcb_list_insert(_xcb_list *list, void *data); +int _xcb_list_append(_xcb_list *list, void *data); +void *_xcb_list_peek_head(_xcb_list *list); +void *_xcb_list_remove_head(_xcb_list *list); +void *_xcb_list_remove(_xcb_list *list, int (*cmp)(const void *, const void *), const void *data); +void *_xcb_list_find(_xcb_list *list, int (*cmp)(const void *, const void *), const void *data); + +typedef _xcb_list _xcb_queue; + +_xcb_queue *_xcb_queue_new(void); +void _xcb_queue_delete(_xcb_queue *q, XCBListFreeFunc do_free); +int _xcb_queue_enqueue(_xcb_queue *q, void *data); +void *_xcb_queue_dequeue(_xcb_queue *q); +int _xcb_queue_is_empty(_xcb_queue *q); + +typedef _xcb_list _xcb_map; + +_xcb_map *_xcb_map_new(void); +void _xcb_map_delete(_xcb_map *q, XCBListFreeFunc do_free); +int _xcb_map_put(_xcb_map *q, unsigned int key, void *data); +void *_xcb_map_get(_xcb_map *q, unsigned int key); +void *_xcb_map_remove(_xcb_map *q, unsigned int key); + + +/* xcb_util.c */ + +/* Index of nearest 4-byte boundary following E. */ +#define XCB_CEIL(E) (((E)+3)&~3) + +#define XCB_PAD(i) ((4 - (i & 3)) & 3) + +int _xcb_set_fd_flags(const int fd); +int _xcb_readn(const int fd, void *buf, const int buflen, int *count); +int _xcb_read_block(const int fd, void *buf, const size_t len); +int _xcb_write(const int fd, char (*buf)[], int *count); +int _xcb_writev(const int fd, struct iovec *vec, int count); + + +/* xcb_out.c */ + +typedef struct _xcb_out { + pthread_cond_t cond; + int writing; + + char queue[4096]; + int queue_len; + struct iovec *vec; + int vec_len; + + void *last_request; + unsigned int request; + unsigned int request_written; + + pthread_mutex_t reqlenlock; + CARD32 maximum_request_length; +} _xcb_out; + +int _xcb_out_init(_xcb_out *out); +void _xcb_out_destroy(_xcb_out *out); + +int _xcb_out_write(XCBConnection *c); +int _xcb_out_write_block(XCBConnection *c, struct iovec *vector, size_t count); +int _xcb_out_flush(XCBConnection *c); + + +/* xcb_in.c */ + +typedef struct _xcb_in { + pthread_cond_t event_cond; + int reading; + + char queue[4096]; + int queue_len; + + unsigned int request_read; + _xcb_queue *current_reply; + + _xcb_map *replies; + _xcb_queue *events; + _xcb_list *readers; +} _xcb_in; + +int _xcb_in_init(_xcb_in *in); +void _xcb_in_destroy(_xcb_in *in); + +int _xcb_in_expect_reply(XCBConnection *c, unsigned int request); + +int _xcb_in_read_packet(XCBConnection *c); +int _xcb_in_read(XCBConnection *c); +int _xcb_in_read_block(XCBConnection *c, void *buf, int nread); + + +/* xcb_xid.c */ + +typedef struct _xcb_xid { + pthread_mutex_t lock; + CARD32 last; + CARD32 base; + CARD32 max; + CARD32 inc; +} _xcb_xid; + +int _xcb_xid_init(XCBConnection *c); +void _xcb_xid_destroy(XCBConnection *c); + + +/* xcb_ext.c */ + +typedef struct _xcb_ext { + pthread_mutex_t lock; + _xcb_map *extensions; +} _xcb_ext; + +int _xcb_ext_init(XCBConnection *c); +void _xcb_ext_destroy(XCBConnection *c); + + +/* xcb_conn.c */ + +struct XCBConnection { + /* constant data */ + XCBConnSetupSuccessRep *setup; + int fd; + + /* I/O data */ + pthread_mutex_t iolock; + _xcb_in in; + _xcb_out out; + + /* misc data */ + _xcb_ext ext; + _xcb_xid xid; +}; + +int _xcb_conn_wait(XCBConnection *c, const int should_write, pthread_cond_t *cond); +#endif diff --git a/src/xcbxlib.h b/src/xcbxlib.h new file mode 100644 index 0000000..e9f7140 --- /dev/null +++ b/src/xcbxlib.h @@ -0,0 +1,38 @@ +/* + * Copyright (C) 2005 Bart Massey and Jamey Sharp. + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + * Except as contained in this notice, the names of the authors or their + * institutions shall not be used in advertising or otherwise to promote the + * sale, use or other dealings in this Software without prior written + * authorization from the authors. + */ + +#ifndef __XCBXLIB_H +#define __XCBXLIB_H + +#include <pthread.h> +#include "xcb.h" + +unsigned int XCBGetRequestSent(XCBConnection *c); + +pthread_mutex_t *XCBGetIOLock(XCBConnection *c); + +#endif diff --git a/tests/.cvsignore b/tests/.cvsignore new file mode 100644 index 0000000..bfa26dd --- /dev/null +++ b/tests/.cvsignore @@ -0,0 +1,2 @@ +Makefile.in +CheckLog.html diff --git a/tests/CheckLog.xsl b/tests/CheckLog.xsl new file mode 100644 index 0000000..3daebaa --- /dev/null +++ b/tests/CheckLog.xsl @@ -0,0 +1,104 @@ +<?xml version="1.0" encoding="UTF-8"?> + +<xsl:stylesheet + version="1.0" + xmlns:check="http://check.sourceforge.net/ns" + xmlns:xsl="http://www.w3.org/1999/XSL/Transform" + xmlns="http://www.w3.org/TR/REC-html40"> + +<xsl:output method="html"/> + +<xsl:template match="/"> +<html> + <head> + <title>Test Suite Results</title> + </head> + + <body> + <xsl:apply-templates/> + </body> +</html> +</xsl:template> + +<xsl:template match="datetime"> + <xsl:apply-templates/> +</xsl:template> + +<xsl:template match="duration"> + <xsl:apply-templates/> +</xsl:template> + +<xsl:template match="check:suite"> + <xsl:apply-templates select="check:title"/> + <center> + <table width="80%" border="1"> + <thead> + <tr> + <td>Test Path</td> + <td>Test Function Location</td> + <td>C Identifier</td> + <td>Test Case</td> + <td>Result</td> + </tr> + </thead> + <tbody> + <xsl:apply-templates select="check:test"/> + </tbody> + </table> + </center> +</xsl:template> + +<xsl:template match="check:testsuites"> + <xsl:apply-templates select="check:suite"/> + <h3>Unit Test Statistics</h3> + <ul> + <li>date/time: <xsl:apply-templates select="check:datetime"/></li> + <li>duration: <xsl:apply-templates select="check:duration"/></li> + </ul> + <hr></hr> +</xsl:template> + +<xsl:template match="check:title"> + <h2>Test Suite: <xsl:apply-templates/></h2> +</xsl:template> + +<xsl:template match="check:test[@result='success']"> + <tr bgcolor="lime"> + <xsl:apply-templates/> + </tr> +</xsl:template> + +<xsl:template match="check:test[@result='failure']"> + <tr bgcolor="red"> + <xsl:apply-templates/> + </tr> +</xsl:template> + +<xsl:template match="check:test[@result='error']"> + <tr bgcolor="yellow"> + <xsl:apply-templates/> + </tr> +</xsl:template> + +<xsl:template match="check:path"> + <td><xsl:apply-templates/></td> +</xsl:template> + +<xsl:template match="check:fn"> + <td><xsl:apply-templates/></td> +</xsl:template> + +<xsl:template match="check:id"> + <td><xsl:apply-templates/></td> +</xsl:template> + +<xsl:template match="check:description"> + <td><xsl:apply-templates/></td> +</xsl:template> + +<xsl:template match="check:message"> + <td><xsl:apply-templates/></td> +</xsl:template> + +</xsl:stylesheet> + diff --git a/tests/Makefile.am b/tests/Makefile.am new file mode 100644 index 0000000..fceaf13 --- /dev/null +++ b/tests/Makefile.am @@ -0,0 +1,32 @@ +######################## +## tests/Makefile.am +######################## +SUBDIRS = +EXTRA_DIST = CheckLog.xsl +AM_MAKEFLAGS = -k +AM_CFLAGS = -Wall -Werror $(XPROTO_CFLAGS) @CHECK_CFLAGS@ -I$(top_srcdir)/src +LDADD = @CHECK_LIBS@ $(top_builddir)/src/libXCB.la + +if HAVE_CHECK +TESTS = check_all +check_PROGRAMS = check_all +check_all_SOURCES = check_all.c check_suites.h check_public.c + +all-local:: + $(RM) CheckLog*.xml + +check-local: + $(RM) CheckLog.html + if test x$(HTML_CHECK_RESULT) = xtrue; then \ + $(XSLTPROC) $(srcdir)/CheckLog.xsl CheckLog*.xml > CheckLog.html; \ + else \ + touch CheckLog.html; \ + fi + +CheckLog.html: $(check_PROGRAMS) + $(MAKE) $(AM_MAKEFLAGS) check; + +endif + +clean-local:: + $(RM) CheckLog.html CheckLog*.txt CheckLog*.xml diff --git a/tests/check_all.c b/tests/check_all.c new file mode 100644 index 0000000..4393422 --- /dev/null +++ b/tests/check_all.c @@ -0,0 +1,20 @@ +#include <stdlib.h> +#include "check_suites.h" + +void suite_add_test(Suite *s, TFun tf, const char *name) +{ + TCase *tc = tcase_create(name); + tcase_add_test(tc, tf); + suite_add_tcase(s, tc); +} + +int main(void) +{ + int nf; + SRunner *sr = srunner_create(public_suite()); + srunner_set_xml(sr, "CheckLog_xcb.xml"); + srunner_run_all(sr, CK_NORMAL); + nf = srunner_ntests_failed(sr); + srunner_free(sr); + return (nf == 0) ? EXIT_SUCCESS : EXIT_FAILURE; +} diff --git a/tests/check_public.c b/tests/check_public.c new file mode 100644 index 0000000..9a32ba9 --- /dev/null +++ b/tests/check_public.c @@ -0,0 +1,129 @@ +#include <check.h> +#include <string.h> +#include <stdlib.h> +#include "check_suites.h" +#include "xcb.h" + +/* XCBParseDisplay tests {{{ */ + +static void parse_display_pass(const char *name, const char *host, const int display, const int screen) +{ + int success; + char *got_host; + int got_display, got_screen; + + got_host = (char *) -1; + got_display = got_screen = -42; + mark_point(); + success = XCBParseDisplay(name, &got_host, &got_display, &got_screen); + fail_unless(success, "unexpected parse failure for '%s'", name); + fail_unless(strcmp(host, got_host) == 0, "parse produced unexpected hostname '%s' for '%s': expected '%s'", got_host, name, host); + fail_unless(display == got_display, "parse produced unexpected display '%d' for '%s': expected '%d'", got_display, name, display); + fail_unless(screen == got_screen, "parse produced unexpected screen '%d' for '%s': expected '%d'", got_screen, name, screen); + + got_host = (char *) -1; + got_display = got_screen = -42; + mark_point(); + success = XCBParseDisplay(name, &got_host, &got_display, 0); + fail_unless(success, "unexpected screenless parse failure for '%s'", name); + fail_unless(strcmp(host, got_host) == 0, "screenless parse produced unexpected hostname '%s' for '%s': expected '%s'", got_host, name, host); + fail_unless(display == got_display, "screenless parse produced unexpected display '%d' for '%s': expected '%d'", got_display, name, display); +} + +static void parse_display_fail(const char *name) +{ + int success; + char *got_host; + int got_display, got_screen; + + got_host = (char *) -1; + got_display = got_screen = -42; + mark_point(); + success = XCBParseDisplay(name, &got_host, &got_display, &got_screen); + fail_unless(!success, "unexpected parse success for '%s'", name); + fail_unless(got_host == (char *) -1, "host changed on failure for '%s': got %p", got_host); + fail_unless(got_display == -42, "display changed on failure for '%s': got %d", got_display); + fail_unless(got_screen == -42, "screen changed on failure for '%s': got %d", got_screen); + + got_host = (char *) -1; + got_display = got_screen = -42; + mark_point(); + success = XCBParseDisplay(name, &got_host, &got_display, 0); + fail_unless(!success, "unexpected screenless parse success for '%s'", name); + fail_unless(got_host == (char *) -1, "host changed on failure for '%s': got %p", got_host); + fail_unless(got_display == -42, "display changed on failure for '%s': got %d", got_display); +} + +START_TEST(parse_display_unix) +{ + parse_display_pass(":0", "", 0, 0); + parse_display_pass(":1", "", 1, 0); + parse_display_pass(":0.1", "", 0, 1); +} +END_TEST + +START_TEST(parse_display_ip) +{ + parse_display_pass("x.org:0", "x.org", 0, 0); + parse_display_pass("expo:0", "expo", 0, 0); + parse_display_pass("bigmachine:1", "bigmachine", 1, 0); + parse_display_pass("hydra:0.1", "hydra", 0, 1); +} +END_TEST + +START_TEST(parse_display_ipv4) +{ + parse_display_pass("198.112.45.11:0", "198.112.45.11", 0, 0); + parse_display_pass("198.112.45.11:0.1", "198.112.45.11", 0, 1); +} +END_TEST + +START_TEST(parse_display_ipv6) +{ + parse_display_pass("::1:0", "::1", 0, 0); + parse_display_pass("::1:0.1", "::1", 0, 1); + parse_display_pass("2002:83fc:d052::1:0", "2002:83fc:d052::1", 0, 0); + parse_display_pass("2002:83fc:d052::1:0.1", "2002:83fc:d052::1", 0, 1); +} +END_TEST + +START_TEST(parse_display_decnet) +{ + parse_display_pass("myws::0", "myws:", 0, 0); + parse_display_pass("big::1", "big:", 1, 0); + parse_display_pass("hydra::0.1", "hydra:", 0, 1); +} +END_TEST + +START_TEST(parse_display_negative) +{ + parse_display_fail(0); + parse_display_fail(""); + parse_display_fail(":"); + parse_display_fail("::"); + parse_display_fail(":."); + parse_display_fail(":a"); + parse_display_fail(":a."); + parse_display_fail(":0."); + parse_display_fail(":0.a"); + parse_display_fail(":0.0."); + + parse_display_fail("localhost"); + parse_display_fail("localhost:"); +} +END_TEST + +/* }}} */ + +Suite *public_suite(void) +{ + Suite *s = suite_create("Public API"); + putenv("DISPLAY"); + suite_add_test(s, parse_display_unix, "XCBParseDisplay unix"); + suite_add_test(s, parse_display_ip, "XCBParseDisplay ip"); + suite_add_test(s, parse_display_ipv4, "XCBParseDisplay ipv4"); + suite_add_test(s, parse_display_ipv6, "XCBParseDisplay ipv6"); + suite_add_test(s, parse_display_decnet, "XCBParseDisplay decnet"); + suite_add_test(s, parse_display_negative, "XCBParseDisplay negative"); + return s; +} diff --git a/tests/check_suites.h b/tests/check_suites.h new file mode 100644 index 0000000..499f1af --- /dev/null +++ b/tests/check_suites.h @@ -0,0 +1,4 @@ +#include <check.h> + +void suite_add_test(Suite *s, TFun tf, const char *name); +Suite *public_suite(void); diff --git a/xcb.pc.in b/xcb.pc.in new file mode 100644 index 0000000..108165d --- /dev/null +++ b/xcb.pc.in @@ -0,0 +1,10 @@ +prefix=@prefix@ +exec_prefix=@exec_prefix@ +libdir=@libdir@ +includedir=@includedir@ + +Name: XCB +Description: X-protocol C Binding +Version: @PACKAGE_VERSION@ +Libs: -L${libdir} -lXCB @XPROTO_LIBS@ @LIBS@ +Cflags: -I${includedir} @XPROTO_CFLAGS@ |