mirror of
https://git.code.sf.net/p/quake/newtree
synced 2024-11-22 04:01:17 +00:00
New functionality: QuakeForge now has a general OpenGL extension-loading
interface. To detect an extension, call QFGL_ExtensionPresent(). To get the address of an extension function, call QFGL_ExtensionAddress(). This function uses the preferred method for finding a function, based on whatever OS and windowing system you use.
This commit is contained in:
Jeff Teunissen
parent
ba1b5f8974
commit
732dc94090
2 changed files with 289 additions and 0 deletions
109
include/qfgl_ext.h
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109
include/qfgl_ext.h
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/*
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qfgl_ext.h
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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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#ifndef __qfgl_ext_h_
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#define __qfgl_ext_h_
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <GL/gl.h>
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#ifdef HAVE_GL_GLX_H
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# include <GL/glx.h>
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#endif
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#ifdef HAVE_GL_GLEXT_H
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# include <GL/glext.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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#include "qtypes.h"
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/* Standard OpenGL external function defs */
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typedef void (GLAPIENTRY *QF_glBlendColor) (GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha);
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typedef void (GLAPIENTRY *QF_glBlendEquation) (GLenum mode);
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typedef void (GLAPIENTRY *QF_glDrawRangeElements) (GLenum mode, GLuint start, GLuint end, GLsizei count, GLenum type, const GLvoid *indices);
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typedef void (GLAPIENTRY *QF_glColorTable) (GLenum target, GLenum internalformat, GLsizei width, GLenum format, GLenum type, const GLvoid *table);
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typedef void (GLAPIENTRY *QF_glColorTableParameterfv) (GLenum target, GLenum pname, const GLfloat *params);
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typedef void (GLAPIENTRY *QF_glColorTableParameteriv) (GLenum target, GLenum pname, const GLint *params);
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typedef void (GLAPIENTRY *QF_glCopyColorTable) (GLenum target, GLenum internalformat, GLint x, GLint y, GLsizei width);
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typedef void (GLAPIENTRY *QF_glGetColorTable) (GLenum target, GLenum format, GLenum type, GLvoid *table);
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typedef void (GLAPIENTRY *QF_glGetColorTableParameterfv) (GLenum target, GLenum pname, GLfloat *params);
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typedef void (GLAPIENTRY *QF_glGetColorTableParameteriv) (GLenum target, GLenum pname, GLint *params);
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typedef void (GLAPIENTRY *QF_glColorSubTable) (GLenum target, GLsizei start, GLsizei count, GLenum format, GLenum type, const GLvoid *data);
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typedef void (GLAPIENTRY *QF_glCopyColorSubTable) (GLenum target, GLsizei start, GLint x, GLint y, GLsizei width);
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typedef void (GLAPIENTRY *QF_glConvolutionFilter1D) (GLenum target, GLenum internalformat, GLsizei width, GLenum format, GLenum type, const GLvoid *image);
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typedef void (GLAPIENTRY *QF_glConvolutionFilter2D) (GLenum target, GLenum internalformat, GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid *image);
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typedef void (GLAPIENTRY *QF_glConvolutionParameterf) (GLenum target, GLenum pname, GLfloat params);
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typedef void (GLAPIENTRY *QF_glConvolutionParameterfv) (GLenum target, GLenum pname, const GLfloat *params);
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typedef void (GLAPIENTRY *QF_glConvolutionParameteri) (GLenum target, GLenum pname, GLint params);
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typedef void (GLAPIENTRY *QF_glConvolutionParameteriv) (GLenum target, GLenum pname, const GLint *params);
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typedef void (GLAPIENTRY *QF_glCopyConvolutionFilter1D) (GLenum target, GLenum internalformat, GLint x, GLint y, GLsizei width);
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typedef void (GLAPIENTRY *QF_glCopyConvolutionFilter2D) (GLenum target, GLenum internalformat, GLint x, GLint y, GLsizei width, GLsizei height);
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typedef void (GLAPIENTRY *QF_glGetConvolutionFilter) (GLenum target, GLenum format, GLenum type, GLvoid *image);
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typedef void (GLAPIENTRY *QF_glGetConvolutionParameterfv) (GLenum target, GLenum pname, GLfloat *params);
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typedef void (GLAPIENTRY *QF_glGetConvolutionParameteriv) (GLenum target, GLenum pname, GLint *params);
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typedef void (GLAPIENTRY *QF_glGetSeparableFilter) (GLenum target, GLenum format, GLenum type, GLvoid *row, GLvoid *column, GLvoid *span);
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typedef void (GLAPIENTRY *QF_glSeparableFilter2D) (GLenum target, GLenum internalformat, GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid *row, const GLvoid *column);
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typedef void (GLAPIENTRY *QF_glGetHistogram) (GLenum target, GLboolean reset, GLenum format, GLenum type, GLvoid *values);
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typedef void (GLAPIENTRY *QF_glGetHistogramParameterfv) (GLenum target, GLenum pname, GLfloat *params);
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typedef void (GLAPIENTRY *QF_glGetHistogramParameteriv) (GLenum target, GLenum pname, GLint *params);
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typedef void (GLAPIENTRY *QF_glGetMinmax) (GLenum target, GLboolean reset, GLenum format, GLenum type, GLvoid *values);
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typedef void (GLAPIENTRY *QF_glGetMinmaxParameterfv) (GLenum target, GLenum pname, GLfloat *params);
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typedef void (GLAPIENTRY *QF_glGetMinmaxParameteriv) (GLenum target, GLenum pname, GLint *params);
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typedef void (GLAPIENTRY *QF_glHistogram) (GLenum target, GLsizei width, GLenum internalformat, GLboolean sink);
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typedef void (GLAPIENTRY *QF_glMinmax) (GLenum target, GLenum internalformat, GLboolean sink);
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typedef void (GLAPIENTRY *QF_glResetHistogram) (GLenum target);
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typedef void (GLAPIENTRY *QF_glResetMinmax) (GLenum target);
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typedef void (GLAPIENTRY *QF_glTexImage3D) (GLenum target, GLint level, GLint internalformat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLenum format, GLenum type, const GLvoid *pixels);
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typedef void (GLAPIENTRY *QF_glTexSubImage3D) (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, const GLvoid *pixels);
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typedef void (GLAPIENTRY *QF_glCopyTexSubImage3D) (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLint x, GLint y, GLsizei width, GLsizei height);
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// GL_EXT_paletted_texture
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typedef void (GLAPIENTRY *QF_glColorTableEXT) (GLenum target, GLenum internalFormat, GLsizei width, GLenum format, GLenum type, const GLvoid *table);
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typedef void (GLAPIENTRY *QF_glGetColorTableEXT) (GLenum target, GLenum format, GLenum type, GLvoid *data);
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typedef void (GLAPIENTRY *QF_glGetColorTableParameterivEXT) (GLenum target, GLenum pname, GLint *params);
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typedef void (GLAPIENTRY *QF_glGetColorTableParameterfvEXT) (GLenum target, GLenum pname, GLfloat *params);
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// 3Dfx
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typedef void (GLAPIENTRY *QF_gl3DfxSetPaletteEXT) (GLuint *pal);
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// GLX 1.3
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typedef void *(GLAPIENTRY *QF_glXGetProcAddressARB) (const GLubyte *procName);
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// WGL (Windows GL)
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typedef const GLubyte *(GLAPIENTRY *QF_wglGetExtensionsStringEXT) (void);
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/* QuakeForge extension functions */
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qboolean QFGL_ExtensionPresent (const char *);
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void *QFGL_ExtensionAddress (const char *);
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#endif // __qfgl_ext_h_
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180
source/qfgl_ext.c
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180
source/qfgl_ext.c
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@ -0,0 +1,180 @@
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/*
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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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#include <GL/gl.h>
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#ifdef HAVE_GL_GLX_H
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# include <GL/glx.h>
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#endif
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#ifdef HAVE_GL_GLEXT_H
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# include <GL/glext.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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#include <string.h>
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#include "qfgl_ext.h"
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#include "qtypes.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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#ifdef _WIN32
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static const GLubyte *wgl_extensions = NULL;
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static qboolean extensionFunc_present = true;
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static QF_wglGetExtensionsStringEXT extensionFunc = NULL;
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#endif
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if (!gl_extensions) { // get and save GL extension list
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gl_extensions = glGetString (GL_EXTENSIONS);
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}
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#ifdef _WIN32
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if (!wgl_extensions) { // get and save WGL extension list
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if (extensionFunc_present && !extensionFunc) {
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if (!(QFGL_ParseExtensionList (gl_extensions, "WGL_EXT_extensions_string"))) {
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extensionFunc_present = false;
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} else {
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extensionFunc = QFGL_ExtensionAddress ("WGL_EXT_extension_string");
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}
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}
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if (extensionFunc_present)
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wgl_extensions = extensionFunc ();
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else
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wgl_extensions = "";
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}
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if (QFGL_ParseExtensionList (gl_extensions, name))
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return true;
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if (QFGL_ParseExtensionList (wgl_extensions, name))
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return true;
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return false;
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#else
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return QFGL_ParseExtensionList (gl_extensions, name);
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#endif
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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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