wxSources/OpenGL_extensions.c

   1 /*
   2  *  OpenGL_extensions.c
   3  *  Molby
   4  *
   5  *  Created by Toshi Nagata on 2014/03/17.
   6  *  Copyright 2008-2014 Toshi Nagata. All rights reserved.
   7  *
   8  This program is free software; you can redistribute it and/or modify
   9  it under the terms of the GNU General Public License as published by
  10  the Free Software Foundation version 2 of the License.
  11
  12  This program is distributed in the hope that it will be useful,
  13  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  GNU General Public License for more details.
  16  */
  17
  18 /*  Implement OpenGL extentions  */
  19
  20 #include "OpenGL_extensions.h"
  21
  22 /*  Function pointers  */
  23 typedef GLboolean (*t_glIsRenderbufferEXT)(GLuint renderbuffer);
  24 typedef void (*t_glBindRenderbufferEXT)(GLenum target, GLuint renderbuffer);
  25 typedef void (*t_glDeleteRenderbuffersEXT)(GLsizei n, const GLuint * renderbuffers);
  26 typedef void (*t_glGenRenderbuffersEXT)(GLsizei n, GLuint * renderbuffers);
  27 typedef void (*t_glRenderbufferStorageEXT)(GLenum target, GLenum internalformat, GLsizei width, GLsizei height);
  28 typedef void (*t_glGetRenderbufferParameterivEXT)(GLenum target, GLenum pname, GLint * params);
  29 typedef GLboolean (*t_glIsFramebufferEXT)(GLuint framebuffer);
  30 typedef void (*t_glBindFramebufferEXT)(GLenum target, GLuint framebuffer);
  31 typedef void (*t_glDeleteFramebuffersEXT)(GLsizei n, const GLuint * framebuffers);
  32 typedef void (*t_glGenFramebuffersEXT)(GLsizei n, GLuint * framebuffers);
  33 typedef GLenum (*t_glCheckFramebufferStatusEXT)(GLenum target);
  34 typedef void (*t_glFramebufferTexture1DEXT)(GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level);
  35 typedef void (*t_glFramebufferTexture2DEXT)(GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level);
  36 typedef void (*t_glFramebufferTexture3DEXT)(GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level, GLint zoffset);
  37 typedef void (*t_glFramebufferRenderbufferEXT)(GLenum target, GLenum attachment, GLenum renderbuffertarget, GLuint renderbuffer);
  38 typedef void (*t_glGetFramebufferAttachmentParameterivEXT)(GLenum target, GLenum attachment, GLenum pname, GLint * params);
  39 typedef void (*t_glGenerateMipmapEXT)(GLenum target);
  40
  41 static t_glIsRenderbufferEXT p_glIsRenderbufferEXT;
  42 static t_glBindRenderbufferEXT p_glBindRenderbufferEXT;
  43 static t_glDeleteRenderbuffersEXT p_glDeleteRenderbuffersEXT;
  44 static t_glGenRenderbuffersEXT p_glGenRenderbuffersEXT;
  45 static t_glRenderbufferStorageEXT p_glRenderbufferStorageEXT;
  46 static t_glGetRenderbufferParameterivEXT p_glGetRenderbufferParameterivEXT;
  47 static t_glIsFramebufferEXT p_glIsFramebufferEXT;
  48 static t_glBindFramebufferEXT p_glBindFramebufferEXT;
  49 static t_glDeleteFramebuffersEXT p_glDeleteFramebuffersEXT;
  50 static t_glGenFramebuffersEXT p_glGenFramebuffersEXT;
  51 static t_glCheckFramebufferStatusEXT p_glCheckFramebufferStatusEXT;
  52 static t_glFramebufferTexture1DEXT p_glFramebufferTexture1DEXT;
  53 static t_glFramebufferTexture2DEXT p_glFramebufferTexture2DEXT;
  54 static t_glFramebufferTexture3DEXT p_glFramebufferTexture3DEXT;
  55 static t_glFramebufferRenderbufferEXT p_glFramebufferRenderbufferEXT;
  56 static t_glGetFramebufferAttachmentParameterivEXT p_glGetFramebufferAttachmentParameterivEXT;
  57 static t_glGenerateMipmapEXT p_glGenerateMipmapEXT;
  58
  59 static int p_inited = 0;
  60
  61 int
  62 InitializeOpenGLExtensions(void)
  63 {
  64     int n = 0;
  65     if (p_inited != 0)
  66         return;
  67     p_glIsRenderbufferEXT = (t_glIsRenderbufferEXT)wglGetProcAddress("glIsRenderbufferEXT");
  68     if (p_glIsRenderbufferEXT == NULL)
  69         n++;
  70     p_glBindRenderbufferEXT = (t_glBindRenderbufferEXT)wglGetProcAddress("glBindRenderbufferEXT");
  71     if (p_glBindRenderbufferEXT == NULL)
  72         n++;
  73     p_glDeleteRenderbuffersEXT = (t_glDeleteRenderbuffersEXT)wglGetProcAddress("glDeleteRenderbuffersEXT");
  74     if (p_glDeleteRenderbuffersEXT == NULL)
  75         n++;
  76     p_glGenRenderbuffersEXT = (t_glGenRenderbuffersEXT)wglGetProcAddress("glGenRenderbuffersEXT");
  77     if (p_glGenRenderbuffersEXT == NULL)
  78         n++;
  79     p_glRenderbufferStorageEXT = (t_glRenderbufferStorageEXT)wglGetProcAddress("glRenderbufferStorageEXT");
  80     if (p_glRenderbufferStorageEXT == NULL)
  81         n++;
  82     p_glGetRenderbufferParameterivEXT = (t_glGetRenderbufferParameterivEXT)wglGetProcAddress("glGetRenderbufferParameterivEXT");
  83     if (p_glGetRenderbufferParameterivEXT == NULL)
  84         n++;
  85     p_glIsFramebufferEXT = (t_glIsFramebufferEXT)wglGetProcAddress("glIsFramebufferEXT");
  86     if (p_glIsFramebufferEXT == NULL)
  87         n++;
  88     p_glBindFramebufferEXT = (t_glBindFramebufferEXT)wglGetProcAddress("glBindFramebufferEXT");
  89     if (p_glBindFramebufferEXT == NULL)
  90         n++;
  91     p_glDeleteFramebuffersEXT = (t_glDeleteFramebuffersEXT)wglGetProcAddress("glDeleteFramebuffersEXT");
  92     if (p_glDeleteFramebuffersEXT == NULL)
  93         n++;
  94     p_glGenFramebuffersEXT = (t_glGenFramebuffersEXT)wglGetProcAddress("glGenFramebuffersEXT");
  95     if (p_glGenFramebuffersEXT == NULL)
  96         n++;
  97     p_glCheckFramebufferStatusEXT = (t_glCheckFramebufferStatusEXT)wglGetProcAddress("glCheckFramebufferStatusEXT");
  98     if (p_glCheckFramebufferStatusEXT == NULL)
  99         n++;
 100     p_glFramebufferTexture1DEXT = (t_glFramebufferTexture1DEXT)wglGetProcAddress("glFramebufferTexture1DEXT");
 101     if (p_glFramebufferTexture1DEXT == NULL)
 102         n++;
 103     p_glFramebufferTexture2DEXT = (t_glFramebufferTexture2DEXT)wglGetProcAddress("glFramebufferTexture2DEXT");
 104     if (p_glFramebufferTexture2DEXT == NULL)
 105         n++;
 106     p_glFramebufferTexture3DEXT = (t_glFramebufferTexture3DEXT)wglGetProcAddress("glFramebufferTexture3DEXT");
 107     if (p_glFramebufferTexture3DEXT == NULL)
 108         n++;
 109     p_glFramebufferRenderbufferEXT = (t_glFramebufferRenderbufferEXT)wglGetProcAddress("glFramebufferRenderbufferEXT");
 110     if (p_glFramebufferRenderbufferEXT == NULL)
 111         n++;
 112     p_glGetFramebufferAttachmentParameterivEXT = (t_glGetFramebufferAttachmentParameterivEXT)wglGetProcAddress("glGetFramebufferAttachmentParameterivEXT");
 113     if (p_glGetFramebufferAttachmentParameterivEXT == NULL)
 114         n++;
 115     p_glGenerateMipmapEXT = (t_glGenerateMipmapEXT)wglGetProcAddress("glGenerateMipmapEXT");
 116     if (p_glGenerateMipmapEXT == NULL)
 117         n++;
 118     p_inited = 1;
 119     return n;
 120 }
 121
 122 GLboolean glIsRenderbufferEXT(GLuint renderbuffer)
 123 {
 124         return (*p_glIsRenderbufferEXT)(renderbuffer);
 125 }
 126
 127 void glBindRenderbufferEXT(GLenum target, GLuint renderbuffer)
 128 {
 129         (*p_glBindRenderbufferEXT)(target, renderbuffer);
 130 }
 131
 132 void glDeleteRenderbuffersEXT(GLsizei n, const GLuint * renderbuffers)
 133 {
 134         (*p_glDeleteRenderbuffersEXT)(n, renderbuffers);
 135 }
 136
 137 void glGenRenderbuffersEXT(GLsizei n, GLuint * renderbuffers)
 138 {
 139         (*p_glGenRenderbuffersEXT)(n, renderbuffers);
 140 }
 141
 142 void glRenderbufferStorageEXT(GLenum target, GLenum internalformat, GLsizei width, GLsizei height)
 143 {
 144         (*p_glRenderbufferStorageEXT)(target, internalformat, width, height);
 145 }
 146
 147 void glGetRenderbufferParameterivEXT(GLenum target, GLenum pname, GLint * params)
 148 {
 149         (*p_glGetRenderbufferParameterivEXT)(target, pname, params);
 150 }
 151
 152 GLboolean glIsFramebufferEXT(GLuint framebuffer)
 153 {
 154         (*p_glIsFramebufferEXT)(framebuffer);
 155 }
 156
 157 void glBindFramebufferEXT(GLenum target, GLuint framebuffer)
 158 {
 159         (*p_glBindFramebufferEXT)(target, framebuffer);
 160 }
 161
 162 void glDeleteFramebuffersEXT(GLsizei n, const GLuint * framebuffers)
 163 {
 164         (*p_glDeleteFramebuffersEXT)(n, framebuffers);
 165 }
 166
 167 void glGenFramebuffersEXT(GLsizei n, GLuint * framebuffers)
 168 {
 169         (*p_glGenFramebuffersEXT)(n, framebuffers);
 170 }
 171
 172 GLenum glCheckFramebufferStatusEXT(GLenum target)
 173 {
 174         return (*p_glCheckFramebufferStatusEXT)(target);
 175 }
 176
 177 void glFramebufferTexture1DEXT(GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level)
 178 {
 179         (*p_glFramebufferTexture1DEXT)(target, attachment, textarget, texture, level);
 180 }
 181
 182 void glFramebufferTexture2DEXT(GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level)
 183 {
 184         (*p_glFramebufferTexture2DEXT)(target, attachment, textarget, texture, level);
 185 }
 186
 187 void glFramebufferTexture3DEXT(GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level, GLint zoffset)
 188 {
 189         (*p_glFramebufferTexture3DEXT)(target, attachment, textarget, texture, level, zoffset);
 190 }
 191
 192 void glFramebufferRenderbufferEXT(GLenum target, GLenum attachment, GLenum renderbuffertarget, GLuint renderbuffer)
 193 {
 194         (*p_glFramebufferRenderbufferEXT)(target, attachment, renderbuffertarget, renderbuffer);
 195 }
 196
 197 void glGetFramebufferAttachmentParameterivEXT(GLenum target, GLenum attachment, GLenum pname, GLint * params)
 198 {
 199         (*p_glGetFramebufferAttachmentParameterivEXT)(target, attachment, pname, params);
 200 }
 201
 202 void glGenerateMipmapEXT(GLenum target)
 203 {
 204         (*p_glGenerateMipmapEXT)(target);
 205 }