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/* GDK - The GIMP Drawing Kit
* Copyright (C) 2001-2007 Sun Microsystems, Inc. All rights reserved.
* (Brian Cameron, Dmitriy Demin, James Cheng, Padraig O'Briain)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/*
* Modified by the GTK+ Team and others 1997-2007. See the AUTHORS
* file for a list of people on the GTK+ Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
#include "config.h"
#include <stdlib.h>
#include <dlfcn.h>
#ifdef HAVE_STRINGS_H
#include <strings.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#if defined(HAVE_SYS_SYSTEMINFO_H)
#include <sys/systeminfo.h>
#elif defined(HAVE_SYS_SYSINFO_H)
#include <sys/sysinfo.h>
#endif
#include "gdkmedialib.h"
typedef char * (*ml_version) (void);
static ml_version medialib_version = mlib_version;
gboolean
_gdk_use_medialib (void)
{
char *mlib_version_string;
char sys_info[257];
long count;
/*
* Sun mediaLib(tm) support.
*
* http://www.sun.com/processors/vis/mlib.html
*
*/
if (getenv ("GDK_DISABLE_MEDIALIB"))
return FALSE;
/*
* The imaging functions we want to use were added in mediaLib version 2.
* So turn off mediaLib support if the user has an older version.
* mlib_version returns a string in this format:
*
* mediaLib:0210:20011101:v8plusa
* ^^^^^^^^ ^^^^ ^^^^^^^^ ^^^^^^^
* libname vers build ISALIST identifier
* date (in this case sparcv8plus+vis)
*
* The first 2 digits of the version are the major version. The 3rd digit
* is the minor version, and the 4th digit is the micro version. So the
* above string corresponds to version 2.1.0.In the following test we only
* care about the major version.
*/
mlib_version_string = medialib_version ();
count = sysinfo (SI_ARCHITECTURE, &sys_info[0], 257);
if (count != -1)
{
if (strcmp (sys_info, "i386") == 0)
{
char *mlib_target_isa = &mlib_version_string[23];
/*
* For x86 processors mediaLib generic C implementation
* does not give any performance advantage so disable it.
*/
if (strncmp (mlib_target_isa, "sse", 3) != 0)
{
return FALSE;
}
/*
* For x86 processors use of libumem conflicts with
* mediaLib, so avoid using it.
*/
if (dlsym (RTLD_PROBE, "umem_alloc") != NULL)
{
return FALSE;
}
}
}
else
{
/* Failed to get system architecture, disable mediaLib */
return FALSE;
}
return TRUE;
}
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