diff options
Diffstat (limited to 'src/XrrScreen.c')
| -rw-r--r-- | src/XrrScreen.c | 190 |
1 files changed, 190 insertions, 0 deletions
diff --git a/src/XrrScreen.c b/src/XrrScreen.c new file mode 100644 index 0000000..53c1dde --- /dev/null +++ b/src/XrrScreen.c @@ -0,0 +1,190 @@ +/* + * Copyright © 2006 Keith Packard + * + * Permission to use, copy, modify, distribute, and sell this software and its + * documentation for any purpose is hereby granted without fee, provided that + * the above copyright notice appear in all copies and that both that copyright + * notice and this permission notice appear in supporting documentation, and + * that the name of the copyright holders not be used in advertising or + * publicity pertaining to distribution of the software without specific, + * written prior permission. The copyright holders make no representations + * about the suitability of this software for any purpose. It is provided "as + * is" without express or implied warranty. + * + * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, + * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO + * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR + * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, + * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER + * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE + * OF THIS SOFTWARE. + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <stdio.h> +#include <X11/Xlib.h> +/* we need to be able to manipulate the Display structure on events */ +#include <X11/Xlibint.h> +#include <X11/extensions/render.h> +#include <X11/extensions/Xrender.h> +#include "Xrandrint.h" + +XRRScreenResources * +XRRGetScreenResources (Display *dpy, Window window) +{ + XExtDisplayInfo *info = XRRFindDisplay(dpy); + xRRGetScreenResourcesReply rep; + xRRGetScreenResourcesReq *req; + _XAsyncHandler async; + _XRRVersionState async_state; + int nbytes, nbytesRead, rbytes; + int i; + xRRQueryVersionReq *vreq; + XRRScreenResources *xrsr; + char *names; + char *wire_names, *wire_name; + Bool getting_version = False; + XRandRInfo *xrri; + + RRCheckExtension (dpy, info, 0); + + xrri = (XRandRInfo *) info->data; + + if (xrri->major_version == -1) + { + /* hide a version query in the request */ + GetReq (RRQueryVersion, vreq); + vreq->reqType = info->codes->major_opcode; + vreq->randrReqType = X_RRQueryVersion; + vreq->majorVersion = RANDR_MAJOR; + vreq->minorVersion = RANDR_MINOR; + + async_state.version_seq = dpy->request; + async_state.error = False; + async.next = dpy->async_handlers; + async.handler = _XRRVersionHandler; + async.data = (XPointer) &async_state; + dpy->async_handlers = &async; + + getting_version = True; + } + + GetReq (RRGetScreenResources, req); + req->reqType = info->codes->major_opcode; + req->randrReqType = X_RRGetScreenResources; + req->window = window; + + if (!_XReply (dpy, (xReply *) &rep, 0, xFalse)) + { + if (getting_version) + DeqAsyncHandler (dpy, &async); + SyncHandle (); + return NULL; + } + if (getting_version) + { + DeqAsyncHandler (dpy, &async); + if (async_state.error) + { + SyncHandle(); + } + xrri->major_version = async_state.major_version; + xrri->minor_version = async_state.minor_version; + xrri->has_rates = _XRRHasRates (xrri->minor_version, xrri->major_version); + } + + nbytes = (long) rep.length << 2; + + nbytesRead = (long) (rep.nCrtcs * 4 + + rep.nOutputs * 4 + + rep.nModes * SIZEOF (xRRModeInfo) + + ((rep.nbytesNames + 3) & ~3)); + + /* + * first we must compute how much space to allocate for + * randr library's use; we'll allocate the structures in a single + * allocation, on cleanlyness grounds. + */ + + rbytes = (sizeof (XRRScreenResources) + + rep.nCrtcs * sizeof (RRCrtc) + + rep.nOutputs * sizeof (RROutput) + + rep.nModes * sizeof (XRRModeInfo) + + rep.nbytesNames + rep.nModes); /* '\0' terminate names */ + + xrsr = (XRRScreenResources *) Xmalloc(rbytes); + wire_names = (char *) Xmalloc (rep.nbytesNames); + if (xrsr == NULL || wire_names == NULL) { + if (xrsr) Xfree (xrsr); + if (wire_names) Xfree (wire_names); + _XEatData (dpy, (unsigned long) nbytes); + SyncHandle (); + return NULL; + } + + xrsr->timestamp = rep.timestamp; + xrsr->configTimestamp = rep.configTimestamp; + xrsr->ncrtc = rep.nCrtcs; + xrsr->crtcs = (RRCrtc *) (xrsr + 1); + xrsr->noutput = rep.nOutputs; + xrsr->outputs = (RROutput *) (xrsr->crtcs + rep.nCrtcs); + xrsr->nmode = rep.nModes; + xrsr->modes = (XRRModeInfo *) (xrsr->outputs + rep.nOutputs); + names = (char *) (xrsr->modes + rep.nModes); + + _XRead32 (dpy, xrsr->crtcs, rep.nCrtcs << 2); + _XRead32 (dpy, xrsr->outputs, rep.nOutputs << 2); + + for (i = 0; i < rep.nModes; i++) { + xRRModeInfo modeInfo; + + _XReadPad (dpy, (char *) &modeInfo, SIZEOF (xRRModeInfo)); + xrsr->modes[i].id = modeInfo.id; + xrsr->modes[i].width = modeInfo.width; + xrsr->modes[i].height = modeInfo.height; + xrsr->modes[i].mmWidth = modeInfo.mmWidth; + xrsr->modes[i].mmHeight = modeInfo.mmHeight; + xrsr->modes[i].dotClock = modeInfo.dotClock; + xrsr->modes[i].hSyncStart = modeInfo.hSyncStart; + xrsr->modes[i].hSyncEnd = modeInfo.hSyncEnd; + xrsr->modes[i].hTotal = modeInfo.hTotal; + xrsr->modes[i].hSkew = modeInfo.hSkew; + xrsr->modes[i].vSyncStart = modeInfo.vSyncStart; + xrsr->modes[i].vSyncEnd = modeInfo.vSyncEnd; + xrsr->modes[i].vTotal = modeInfo.vTotal; + xrsr->modes[i].nameLength = modeInfo.nameLength; + xrsr->modes[i].modeFlags = modeInfo.modeFlags; + } + + /* + * Read names and '\0' pad each one + */ + _XRead (dpy, wire_names, rep.nbytesNames); + wire_name = wire_names; + for (i = 0; i < rep.nModes; i++) { + xrsr->modes[i].name = names; + memcpy (names, wire_name, xrsr->modes[i].nameLength); + names[xrsr->modes[i].nameLength] = '\0'; + names += xrsr->modes[i].nameLength + 1; + wire_name += xrsr->modes[i].nameLength; + } + Xfree (wire_names); + + /* + * Skip any extra data + */ + if (nbytes > nbytesRead) + _XEatData (dpy, (unsigned long) (nbytes - nbytesRead)); + + return (XRRScreenResources *) xrsr; +} + +void +XRRFreeScreenResources (XRRScreenResources *resources) +{ + Xfree (resources); +} + |