mirror of
https://git.code.sf.net/p/quake/quakeforge
synced 2024-11-11 07:42:18 +00:00
8ee06d75a9
This paves the way for clean initialization of the Vulkan renderer, and very much cleans up the older renderer initialization code as gl and sw are no longer intertwined.
141 lines
3.1 KiB
C
141 lines
3.1 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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*/
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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/cvar.h"
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#include "QF/qtypes.h"
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#include "QF/sys.h"
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#include "QF/GL/extensions.h"
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#include "QF/GL/funcs.h"
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#include "r_internal.h"
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#include "vid_gl.h"
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// First we need to get all the function pointers declared.
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#define QFGL_WANT(ret, name, args) \
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ret (GLAPIENTRY * qf##name) args;
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#define QFGL_NEED(ret, name, args) \
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ret (GLAPIENTRY * qf##name) args;
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#include "QF/GL/qf_funcs_list.h"
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#undef QFGL_NEED
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#undef QFGL_WANT
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qboolean
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GLF_FindFunctions (void)
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{
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#define QFGL_WANT(ret, name, args) \
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qf##name = gl_ctx->get_proc_address (#name, false);
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#define QFGL_NEED(ret, name, args) \
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qf##name = gl_ctx->get_proc_address (#name, true);
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#include "QF/GL/qf_funcs_list.h"
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#undef QFGL_NEED
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#undef QFGL_WANT
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return true;
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}
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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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static __attribute__((pure)) 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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if (!list)
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return 0;
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// Extension names must not have spaces.
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where = strchr (name, ' ');
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if (where || *name == '\0')
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return 0;
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start = (const char *) 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 = qfglGetString (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 (name)
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return gl_ctx->get_proc_address (name, false);
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return NULL;
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}
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