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https://git.code.sf.net/p/quake/quakeforge-old
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103 lines
2.2 KiB
C
103 lines
2.2 KiB
C
/*
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dga_check.c
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Routines to check for XFree86 DGA and VidMode extensions
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Copyright (C) 2000 Contributors of the QuakeForge Project
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Copyright (C) 2000 Marcus Sundberg [mackan@stacken.kth.se]
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Please see the file "AUTHORS" for a list of contributors
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to:
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Free Software Foundation, Inc.
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59 Temple Place - Suite 330
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Boston, MA 02111-1307, USA.
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*/
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#include <quakedef.h>
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#include <stdlib.h>
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#include <X11/Xlib.h>
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#if defined(HAS_DGA)
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#include <X11/extensions/xf86dga.h>
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#include <X11/extensions/xf86vmode.h>
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#endif
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#include "dga_check.h"
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/*
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VID_CheckDGA
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Check for the presence of the XFree86-DGA X server extension
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*/
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int
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VID_CheckDGA(Display *dpy, int *maj_ver, int *min_ver, int *hasvideo)
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{
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#if defined(HAS_DGA)
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int event_base, error_base, dgafeat, dummy;
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if (! XF86DGAQueryExtension(dpy, &event_base, &error_base)) {
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return 0;
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}
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if (maj_ver == NULL) maj_ver = &dummy;
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if (min_ver == NULL) min_ver = &dummy;
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if (! XF86DGAQueryVersion(dpy, maj_ver, min_ver)) {
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return 0;
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}
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if (! XF86DGAQueryDirectVideo(dpy, DefaultScreen(dpy), &dgafeat)) {
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*hasvideo = 0;
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} else {
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*hasvideo = (dgafeat & XF86DGADirectPresent);
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}
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return 1;
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#else
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return 0;
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#endif // HAS_DGA
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}
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/*
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VID_CheckVMode
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Check for the presence of the XFree86-VidMode X server extension
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*/
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int
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VID_CheckVMode(Display *dpy, int *maj_ver, int *min_ver)
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{
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#if defined(HAS_DGA)
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int event_base, error_base;
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int dummy;
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if (! XF86VidModeQueryExtension(dpy, &event_base, &error_base)) {
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return 0;
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}
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if (maj_ver == NULL) maj_ver = &dummy;
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if (min_ver == NULL) min_ver = &dummy;
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if (! XF86VidModeQueryVersion(dpy, maj_ver, min_ver)) {
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return 0;
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}
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return 1;
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#else
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return 0;
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#endif // HAS_DGA
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}
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