mirror of
https://git.code.sf.net/p/quake/quakeforge
synced 2024-11-27 06:34:11 +00:00
3715430479
The major change is that we no longer require libGL to even exist on the system at compile time for the GL targets, we dynamicly link to the libGL of choice at run time. (This probably breaks most non-linux systems, and all GL targets except -glx, some fixup will be needed.) (This also kills glquake, dead dead DEAD! GONE FOREVER! WHEE!) Some gl_draw cleanup. Commented out equake alias model occlusion test stuff, very experimental. Added the .lo and .la patterns to the .gitignore files. Some minor sbar cleanup. (We don't use the disc in use symbol for anything.)
154 lines
3.2 KiB
C
154 lines
3.2 KiB
C
/*
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qfgl_ext.c
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QuakeForge OpenGL extension interface definitions
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Copyright (C) 2000 Jeff Teunissen <deek@dusknet.dhs.org>
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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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$Id$
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#ifdef HAVE_DLFCN_H
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# include <dlfcn.h>
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#endif
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#ifndef RTLD_LAZY
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# ifdef DL_LAZY
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# define RTLD_LAZY DL_LAZY
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# else
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# define RTLD_LAZY 0
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# endif
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#endif
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#ifdef _WIN32
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// must be BEFORE include gl/gl.h
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# include "winquake.h"
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#endif
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#ifdef HAVE_WINDOWS_H
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# include <windows.h>
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#endif
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#ifdef HAVE_STRING_H
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# include <string.h>
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#endif
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#ifdef HAVE_STRINGS_H
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# include <strings.h>
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#endif
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#include "QF/qtypes.h"
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#include "QF/GL/qf_ext.h"
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#include "QF/GL/funcs.h"
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/*
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ParseExtensionList
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It takes a bit of care to be fool-proof about parsing an OpenGL extensions
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string. Don't be fooled by sub-strings, etc.
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*/
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qboolean
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QFGL_ParseExtensionList (const GLubyte * list, const char *name)
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{
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const char *start;
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char *where, *terminator;
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// Extension names must not have spaces.
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where = (GLubyte *) strchr (name, ' ');
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if (where || *name == '\0')
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return 0;
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start = list;
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for (;;) {
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where = strstr (start, name);
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if (!where)
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break;
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terminator = where + strlen (name);
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if (where == start || *(where - 1) == ' ')
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if (*terminator == ' ' || *terminator == '\0')
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return 1;
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start = terminator;
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}
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return 0;
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}
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qboolean
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QFGL_ExtensionPresent (const char *name)
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{
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static const GLubyte *gl_extensions = NULL;
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if (!gl_extensions) { // get and save GL extension list
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gl_extensions = QFGL_glGetString (GL_EXTENSIONS);
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}
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return QFGL_ParseExtensionList (gl_extensions, name);
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}
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void *
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QFGL_ExtensionAddress (const char *name)
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{
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#if defined(HAVE_GLX) && defined(HAVE_DLOPEN)
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void *dlhand = NULL;
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static qboolean glProcAddress_present = true;
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static QF_glXGetProcAddressARB qfglXGetProcAddress = NULL;
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if (glProcAddress_present && !qfglXGetProcAddress) {
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if (QFGL_ExtensionPresent ("GLX_ARB_get_proc_address")) {
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if ((dlhand = dlopen (NULL, RTLD_LAZY))) {
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qfglXGetProcAddress = dlsym (dlhand, "glXGetProcAddressARB");
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dlclose (dlhand);
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} else {
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glProcAddress_present = false;
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}
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} else {
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glProcAddress_present = false;
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}
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}
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#endif
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if (name) {
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#if defined(HAVE_GLX) && defined(HAVE_DLOPEN)
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if (glProcAddress_present) {
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return qfglXGetProcAddress ((const GLubyte *) name);
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} else {
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if ((dlhand = dlopen (NULL, RTLD_LAZY))) {
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void *handle;
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handle = dlsym (dlhand, name);
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dlclose (dlhand);
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return handle;
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}
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return NULL;
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}
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#else
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# ifdef _WIN32
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return wglGetProcAddress (name);
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# else
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return NULL;
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# endif
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#endif
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}
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return NULL;
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}
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