quakeforge-old/common/dga_check.c

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/*
dga_check.c
Routines to check for XFree86 DGA and VidMode extensions
Copyright (C) 2000 Contributors of the QuakeForge Project
Copyright (C) 2000 Marcus Sundberg [mackan@stacken.kth.se]
Please see the file "AUTHORS" for a list of contributors
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to:
Free Software Foundation, Inc.
59 Temple Place - Suite 330
Boston, MA 02111-1307, USA.
*/
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#include <quakedef.h>
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#include <stdlib.h>
#include <X11/Xlib.h>
#if defined(HAS_DGA) && defined(_EXPERIMENTAL_)
#include <X11/extensions/xf86dga.h>
#include <X11/extensions/xf86vmode.h>
#endif
#include "dga_check.h"
/*
VID_CheckDGA
Check for the presence of the XFree86-DGA X server extension
*/
int
VID_CheckDGA(Display *dpy, int *maj_ver, int *min_ver, int *hasvideo)
{
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#if defined(HAS_DGA) && defined(_EXPERIMENTAL_)
int event_base, error_base, dgafeat, dummy;
if (! XF86DGAQueryExtension(dpy, &event_base, &error_base)) {
return 0;
}
if (maj_ver == NULL) maj_ver = &dummy;
if (min_ver == NULL) min_ver = &dummy;
if (! XF86DGAQueryVersion(dpy, maj_ver, min_ver)) {
return 0;
}
if (! XF86DGAQueryDirectVideo(dpy, DefaultScreen(dpy), &dgafeat)) {
*hasvideo = 0;
} else {
*hasvideo = (dgafeat & XF86DGADirectPresent);
}
return 1;
#else
return 0;
#endif // HAS_DGA
}
/*
VID_CheckVMode
Check for the presence of the XFree86-VidMode X server extension
*/
int
VID_CheckVMode(Display *dpy, int *maj_ver, int *min_ver)
{
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#if defined(HAS_DGA) && defined(_EXPERIMENTAL_)
XF86VidModeModeInfo **vidmodes;
int event_base, error_base;
int dummy;
if (! XF86VidModeQueryExtension(dpy, &event_base, &error_base)) {
return 0;
}
if (maj_ver == NULL) maj_ver = &dummy;
if (min_ver == NULL) min_ver = &dummy;
if (! XF86VidModeQueryVersion(dpy, maj_ver, min_ver)) {
return 0;
}
return 1;
#else
return 0;
#endif // HAS_DGA
}