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<a href="glext_8c.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/* This code is (C) AllegroGL contributors, and double licensed under</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * the GPL and zlib licenses. See gpl.txt or zlib.txt for details.</span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> */</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="preprocessor">#include "<a class="code" href="alleggl_8h.html">alleggl.h</a>"</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="preprocessor">#include "allglint.h"</span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor">#include <string.h></span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="preprocessor">#ifdef ALLEGRO_MACOSX</span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor">#include <OpenGL/glu.h></span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor">#include <GL/glu.h></span></div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> </div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="preprocessor">#include <allegro/internal/aintern.h></span></div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> </div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> </div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment">/* GL extension Structure. Holds the extension pointers for a single context */</span></div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor">#define AGL_API(type, name, args) AGL_##name##_t name;</span></div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="keyword">typedef</span> <span class="keyword">struct </span>AGL_EXT {</div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor"># include "allegrogl/GLext/gl_ext_api.h"</span></div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#ifdef ALLEGRO_WINDOWS</span></div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor"># include "allegrogl/GLext/wgl_ext_api.h"</span></div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#elif defined ALLEGRO_UNIX</span></div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="preprocessor"># include "allegrogl/GLext/glx_ext_api.h"</span></div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> } AGL_EXT;</div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor">#undef AGL_API</span></div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> </div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="preprocessor">#define PREFIX_I "agl-ext INFO: "</span></div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="preprocessor">#define PREFIX_W "agl-ext WARNING: "</span></div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="preprocessor">#define PREFIX_E "agl-ext ERROR: "</span></div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> </div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> </div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="comment">/* Current driver info */</span></div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="keyword">struct </span>allegro_gl_info allegro_gl_info;</div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span> </div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span> </div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> </div><div class="line"><a name="l00055"></a><span class="lineno"><a class="line" href="group__extensions.html#ga7492f6f6acc608789210560ee63e5436"> 55</a></span> <span class="keyword">struct </span>AGL_EXTENSION_LIST_GL <a class="code" href="group__extensions.html#ga7492f6f6acc608789210560ee63e5436">allegro_gl_extensions_GL</a>;</div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span> </div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span> </div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span> </div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="preprocessor">#ifdef ALLEGRO_UNIX</span></div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="keyword">struct </span>AGL_EXTENSION_LIST_GLX allegro_gl_extensions_GLX;</div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span> </div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span> </div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span> </div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="preprocessor">#ifdef ALLEGRO_WINDOWS</span></div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="keyword">struct </span>AGL_EXTENSION_LIST_WGL allegro_gl_extensions_WGL;</div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span> </div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span> </div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span> </div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span> <span class="comment">/* Current context */</span></div><div class="line"><a name="l00082"></a><span class="lineno"><a class="line" href="group__extensions.html#ga2d6ebb26eec58470e4242b750656268b"> 82</a></span> AGL_EXT *<a class="code" href="group__extensions.html#ga2d6ebb26eec58470e4242b750656268b">agl_extension_table</a> = NULL;</div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span> </div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span> </div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span> <span class="preprocessor">#ifdef ALLEGROGL_GENERIC_DRIVER</span></div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span> <span class="preprocessor">#include "GL/amesa.h"</span></div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span> </div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span> </div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span> <span class="preprocessor">#ifdef ALLEGROGL_HAVE_DYNAMIC_LINK</span></div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <span class="preprocessor">#include <dlfcn.h></span></div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span> </div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span> <span class="comment">/* Handle for dynamic library libGL.so */</span></div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span> <span class="keyword">static</span> <span class="keywordtype">void</span>* __agl_handle = NULL;</div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span> <span class="comment">/* Pointer to glXGetProcAddressARB */</span></div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span> <span class="keyword">typedef</span> <span class="keywordtype">void</span>* (*GLXGETPROCADDRESSARBPROC) (<span class="keyword">const</span> GLubyte*);</div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span> <span class="keyword">static</span> GLXGETPROCADDRESSARBPROC aglXGetProcAddress;</div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span> <span class="comment">/* Tries static linking */</span></div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span> <span class="preprocessor">#ifdef ALLEGROGL_GLXGETPROCADDRESSARB</span></div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span> <span class="preprocessor">#define aglXGetProcAddress glXGetProcAddressARB</span></div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span> <span class="preprocessor">#define aglXGetProcAddress glXGetProcAddress</span></div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span> </div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span> </div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span> <span class="preprocessor">#ifdef ALLEGRO_MACOSX</span></div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span> <span class="preprocessor">#undef TRUE</span></div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span> <span class="preprocessor">#undef FALSE</span></div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span> <span class="preprocessor">#include <Carbon/Carbon.h></span></div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span> <span class="preprocessor">#undef TRUE</span></div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span> <span class="preprocessor">#undef FALSE</span></div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span> <span class="preprocessor">#define TRUE -1</span></div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span> <span class="preprocessor">#define FALSE 0</span></div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span> </div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span> <span class="keyword">static</span> CFBundleRef opengl_bundle_ref;</div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span> </div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span> </div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span> </div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span> <span class="comment">/* Define the GL API pointers */</span></div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span> <span class="preprocessor">#define AGL_API(type, name, args) AGL_##name##_t __agl##name = NULL;</span></div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span> <span class="preprocessor"># include "allegrogl/GLext/gl_ext_api.h"</span></div><div class="line"><a name="l00125"></a><span class="lineno"> 125</span> <span class="preprocessor">#undef AGL_API</span></div><div class="line"><a name="l00126"></a><span class="lineno"> 126</span> <span class="preprocessor">#ifdef ALLEGRO_WINDOWS</span></div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span> <span class="preprocessor">#define AGL_API(type, name, args) AGL_##name##_t __awgl##name = NULL;</span></div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span> <span class="preprocessor"># include "allegrogl/GLext/wgl_ext_api.h"</span></div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span> <span class="preprocessor">#undef AGL_API</span></div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span> <span class="preprocessor">#elif defined ALLEGRO_UNIX</span></div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span> <span class="preprocessor">#define AGL_API(type, name, args) AGL_##name##_t __aglX##name = NULL;</span></div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span> <span class="preprocessor"># include "allegrogl/GLext/glx_ext_api.h"</span></div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span> <span class="preprocessor">#undef AGL_API</span></div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span> </div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span> </div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span> </div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span> <span class="comment">/* Create the extension table */</span></div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span> AGL_EXT* __allegro_gl_create_extensions() {</div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span> </div><div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  AGL_EXT *ret = malloc(<span class="keyword">sizeof</span>(AGL_EXT));</div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span> </div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  <span class="keywordflow">if</span> (!ret) {</div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  <span class="keywordflow">return</span> NULL;</div><div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  }</div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span> </div><div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  memset(ret, 0, <span class="keyword">sizeof</span>(AGL_EXT));</div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span> </div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  <span class="keywordflow">return</span> ret;</div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span> }</div><div class="line"><a name="l00151"></a><span class="lineno"> 151</span> </div><div class="line"><a name="l00152"></a><span class="lineno"> 152</span> </div><div class="line"><a name="l00153"></a><span class="lineno"> 153</span> </div><div class="line"><a name="l00154"></a><span class="lineno"> 154</span> <span class="comment">/* Load the extension addresses into the table.</span></div><div class="line"><a name="l00155"></a><span class="lineno"> 155</span> <span class="comment"> * Should only be done on context creation.</span></div><div class="line"><a name="l00156"></a><span class="lineno"> 156</span> <span class="comment"> */</span></div><div class="line"><a name="l00157"></a><span class="lineno"> 157</span> <span class="keywordtype">void</span> __allegro_gl_load_extensions(AGL_EXT *ext) {</div><div class="line"><a name="l00158"></a><span class="lineno"> 158</span> </div><div class="line"><a name="l00159"></a><span class="lineno"> 159</span> <span class="preprocessor">#ifdef ALLEGRO_MACOSX</span></div><div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  CFStringRef <span class="keyword">function</span>;</div><div class="line"><a name="l00161"></a><span class="lineno"> 161</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00162"></a><span class="lineno"> 162</span> </div><div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  <span class="keywordflow">if</span> (!ext) {</div><div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  <span class="keywordflow">return</span>;</div><div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  }</div><div class="line"><a name="l00166"></a><span class="lineno"> 166</span> <span class="preprocessor">#ifdef ALLEGRO_UNIX</span></div><div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  <span class="keywordflow">if</span> (!aglXGetProcAddress) {</div><div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  <span class="keywordflow">return</span>;</div><div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  }</div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span> </div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span> <span class="preprocessor"># ifdef ALLEGRO_WINDOWS</span></div><div class="line"><a name="l00173"></a><span class="lineno"> 173</span> <span class="preprocessor"># define AGL_API(type, name, args) \</span></div><div class="line"><a name="l00174"></a><span class="lineno"> 174</span> <span class="preprocessor"> ext->name = (AGL_##name##_t)wglGetProcAddress("gl" #name); \</span></div><div class="line"><a name="l00175"></a><span class="lineno"> 175</span> <span class="preprocessor"> if (ext->name) { AGL_LOG(2,"gl" #name " successfully loaded\n"); }</span></div><div class="line"><a name="l00176"></a><span class="lineno"> 176</span> <span class="preprocessor"># include "allegrogl/GLext/gl_ext_api.h"</span></div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span> <span class="preprocessor"># undef AGL_API</span></div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span> <span class="preprocessor"># define AGL_API(type, name, args) \</span></div><div class="line"><a name="l00179"></a><span class="lineno"> 179</span> <span class="preprocessor"> ext->name = (AGL_##name##_t)wglGetProcAddress("wgl" #name); \</span></div><div class="line"><a name="l00180"></a><span class="lineno"> 180</span> <span class="preprocessor"> if (ext->name) { AGL_LOG(2,"wgl" #name " successfully loaded\n"); }</span></div><div class="line"><a name="l00181"></a><span class="lineno"> 181</span> <span class="preprocessor"># include "allegrogl/GLext/wgl_ext_api.h"</span></div><div class="line"><a name="l00182"></a><span class="lineno"> 182</span> <span class="preprocessor"># undef AGL_API</span></div><div class="line"><a name="l00183"></a><span class="lineno"> 183</span> <span class="preprocessor"># elif defined ALLEGRO_UNIX</span></div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span> <span class="preprocessor"># define AGL_API(type, name, args) \</span></div><div class="line"><a name="l00185"></a><span class="lineno"> 185</span> <span class="preprocessor"> ext->name = (AGL_##name##_t)aglXGetProcAddress((const GLubyte*)"gl" #name); \</span></div><div class="line"><a name="l00186"></a><span class="lineno"> 186</span> <span class="preprocessor"> if (ext->name) { AGL_LOG(2,"gl" #name " successfully loaded\n"); }</span></div><div class="line"><a name="l00187"></a><span class="lineno"> 187</span> <span class="preprocessor"># include "allegrogl/GLext/gl_ext_api.h"</span></div><div class="line"><a name="l00188"></a><span class="lineno"> 188</span> <span class="preprocessor"># undef AGL_API</span></div><div class="line"><a name="l00189"></a><span class="lineno"> 189</span> <span class="preprocessor"># define AGL_API(type, name, args) \</span></div><div class="line"><a name="l00190"></a><span class="lineno"> 190</span> <span class="preprocessor"> ext->name = (AGL_##name##_t)aglXGetProcAddress((const GLubyte*)"glX" #name); \</span></div><div class="line"><a name="l00191"></a><span class="lineno"> 191</span> <span class="preprocessor"> if (ext->name) { AGL_LOG(2,"glX" #name " successfully loaded\n"); }</span></div><div class="line"><a name="l00192"></a><span class="lineno"> 192</span> <span class="preprocessor"># include "allegrogl/GLext/glx_ext_api.h"</span></div><div class="line"><a name="l00193"></a><span class="lineno"> 193</span> <span class="preprocessor"># undef AGL_API</span></div><div class="line"><a name="l00194"></a><span class="lineno"> 194</span> <span class="preprocessor"># elif defined ALLEGRO_MACOSX</span></div><div class="line"><a name="l00195"></a><span class="lineno"> 195</span> <span class="preprocessor"># define AGL_API(type, name, args) \</span></div><div class="line"><a name="l00196"></a><span class="lineno"> 196</span> <span class="preprocessor"> function = CFStringCreateWithCString(kCFAllocatorDefault, "gl" #name, \</span></div><div class="line"><a name="l00197"></a><span class="lineno"> 197</span> <span class="preprocessor"> kCFStringEncodingASCII); \</span></div><div class="line"><a name="l00198"></a><span class="lineno"> 198</span> <span class="preprocessor"> if (function) { \</span></div><div class="line"><a name="l00199"></a><span class="lineno"> 199</span> <span class="preprocessor"> ext->name = (AGL_##name##_t)CFBundleGetFunctionPointerForName( \</span></div><div class="line"><a name="l00200"></a><span class="lineno"> 200</span> <span class="preprocessor"> opengl_bundle_ref, function); \</span></div><div class="line"><a name="l00201"></a><span class="lineno"> 201</span> <span class="preprocessor"> CFRelease(function); \</span></div><div class="line"><a name="l00202"></a><span class="lineno"> 202</span> <span class="preprocessor"> } \</span></div><div class="line"><a name="l00203"></a><span class="lineno"> 203</span> <span class="preprocessor"> if (ext->name) { AGL_LOG(2,"gl" #name " successfully loaded\n"); }</span></div><div class="line"><a name="l00204"></a><span class="lineno"> 204</span> <span class="preprocessor"># include "allegrogl/GLext/gl_ext_api.h"</span></div><div class="line"><a name="l00205"></a><span class="lineno"> 205</span> <span class="preprocessor"># undef AGL_API</span></div><div class="line"><a name="l00206"></a><span class="lineno"> 206</span> <span class="preprocessor"># endif</span></div><div class="line"><a name="l00207"></a><span class="lineno"> 207</span> }</div><div class="line"><a name="l00208"></a><span class="lineno"> 208</span> </div><div class="line"><a name="l00209"></a><span class="lineno"> 209</span> </div><div class="line"><a name="l00210"></a><span class="lineno"> 210</span> </div><div class="line"><a name="l00211"></a><span class="lineno"> 211</span> <span class="comment">/* Set the GL API pointers to the current table </span></div><div class="line"><a name="l00212"></a><span class="lineno"> 212</span> <span class="comment"> * Should only be called on context switches.</span></div><div class="line"><a name="l00213"></a><span class="lineno"> 213</span> <span class="comment"> */</span></div><div class="line"><a name="l00214"></a><span class="lineno"> 214</span> <span class="keywordtype">void</span> __allegro_gl_set_extensions(AGL_EXT *ext) {</div><div class="line"><a name="l00215"></a><span class="lineno"> 215</span> </div><div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  <span class="keywordflow">if</span> (!ext) {</div><div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  <span class="keywordflow">return</span>;</div><div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  }</div><div class="line"><a name="l00219"></a><span class="lineno"> 219</span> </div><div class="line"><a name="l00220"></a><span class="lineno"> 220</span> <span class="preprocessor">#define AGL_API(type, name, args) __agl##name = ext->name;</span></div><div class="line"><a name="l00221"></a><span class="lineno"> 221</span> <span class="preprocessor"># include "allegrogl/GLext/gl_ext_api.h"</span></div><div class="line"><a name="l00222"></a><span class="lineno"> 222</span> <span class="preprocessor">#undef AGL_API</span></div><div class="line"><a name="l00223"></a><span class="lineno"> 223</span> <span class="preprocessor">#ifdef ALLEGRO_WINDOWS</span></div><div class="line"><a name="l00224"></a><span class="lineno"> 224</span> <span class="preprocessor">#define AGL_API(type, name, args) __awgl##name = ext->name;</span></div><div class="line"><a name="l00225"></a><span class="lineno"> 225</span> <span class="preprocessor"># include "allegrogl/GLext/wgl_ext_api.h"</span></div><div class="line"><a name="l00226"></a><span class="lineno"> 226</span> <span class="preprocessor">#undef AGL_API</span></div><div class="line"><a name="l00227"></a><span class="lineno"> 227</span> <span class="preprocessor">#elif defined ALLEGRO_UNIX</span></div><div class="line"><a name="l00228"></a><span class="lineno"> 228</span> <span class="preprocessor">#define AGL_API(type, name, args) __aglX##name = ext->name;</span></div><div class="line"><a name="l00229"></a><span class="lineno"> 229</span> <span class="preprocessor"># include "allegrogl/GLext/glx_ext_api.h"</span></div><div class="line"><a name="l00230"></a><span class="lineno"> 230</span> <span class="preprocessor">#undef AGL_API</span></div><div class="line"><a name="l00231"></a><span class="lineno"> 231</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00232"></a><span class="lineno"> 232</span> }</div><div class="line"><a name="l00233"></a><span class="lineno"> 233</span> </div><div class="line"><a name="l00234"></a><span class="lineno"> 234</span> </div><div class="line"><a name="l00235"></a><span class="lineno"> 235</span> </div><div class="line"><a name="l00236"></a><span class="lineno"> 236</span> <span class="comment">/* Destroys the extension table */</span></div><div class="line"><a name="l00237"></a><span class="lineno"> 237</span> <span class="keywordtype">void</span> __allegro_gl_destroy_extensions(AGL_EXT *ext) {</div><div class="line"><a name="l00238"></a><span class="lineno"> 238</span> </div><div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  <span class="keywordflow">if</span> (ext) {</div><div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  <span class="keywordflow">if</span> (ext == agl_extension_table) {</div><div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  agl_extension_table = NULL;</div><div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  }</div><div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  free(ext);</div><div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  }</div><div class="line"><a name="l00245"></a><span class="lineno"> 245</span> }</div><div class="line"><a name="l00246"></a><span class="lineno"> 246</span> </div><div class="line"><a name="l00247"></a><span class="lineno"> 247</span> </div><div class="line"><a name="l00248"></a><span class="lineno"> 248</span> </div><div class="line"><a name="l00249"></a><span class="lineno"> 249</span> <span class="comment">/* __allegro_gl_look_for_an_extension:</span></div><div class="line"><a name="l00250"></a><span class="lineno"> 250</span> <span class="comment"> * This function has been written by Mark J. Kilgard in one of his</span></div><div class="line"><a name="l00251"></a><span class="lineno"> 251</span> <span class="comment"> * tutorials about OpenGL extensions</span></div><div class="line"><a name="l00252"></a><span class="lineno"> 252</span> <span class="comment"> */</span></div><div class="line"><a name="l00253"></a><span class="lineno"> 253</span> <span class="keywordtype">int</span> __allegro_gl_look_for_an_extension(AL_CONST <span class="keywordtype">char</span> *name,</div><div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  AL_CONST GLubyte * extensions)</div><div class="line"><a name="l00255"></a><span class="lineno"> 255</span> {</div><div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  AL_CONST GLubyte *start;</div><div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  GLubyte *where, *terminator;</div><div class="line"><a name="l00258"></a><span class="lineno"> 258</span> </div><div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  <span class="comment">/* Extension names should not have spaces. */</span></div><div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  where = (GLubyte *) strchr(name, <span class="charliteral">' '</span>);</div><div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  <span class="keywordflow">if</span> (where || *name == <span class="charliteral">'\0'</span>)</div><div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  <span class="keywordflow">return</span> FALSE;</div><div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  <span class="comment">/* It takes a bit of care to be fool-proof about parsing the</span></div><div class="line"><a name="l00264"></a><span class="lineno"> 264</span> <span class="comment"> * OpenGL extensions string. Don't be fooled by sub-strings, etc.</span></div><div class="line"><a name="l00265"></a><span class="lineno"> 265</span> <span class="comment"> */</span></div><div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  start = extensions;</div><div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  <span class="keywordflow">for</span> (;;) {</div><div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  where = (GLubyte *) strstr((AL_CONST <span class="keywordtype">char</span> *) start, name);</div><div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  <span class="keywordflow">if</span> (!where)</div><div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  terminator = where + strlen(name);</div><div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  <span class="keywordflow">if</span> (where == start || *(where - 1) == <span class="charliteral">' '</span>)</div><div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  <span class="keywordflow">if</span> (*terminator == <span class="charliteral">' '</span> || *terminator == <span class="charliteral">'\0'</span>)</div><div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  <span class="keywordflow">return</span> TRUE;</div><div class="line"><a name="l00275"></a><span class="lineno"> 275</span>  start = terminator;</div><div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  }</div><div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  <span class="keywordflow">return</span> FALSE;</div><div class="line"><a name="l00278"></a><span class="lineno"> 278</span> }</div><div class="line"><a name="l00279"></a><span class="lineno"> 279</span> </div><div class="line"><a name="l00280"></a><span class="lineno"> 280</span> </div><div class="line"><a name="l00281"></a><span class="lineno"> 281</span> </div><div class="line"><a name="l00282"></a><span class="lineno"> 282</span> <span class="preprocessor">#ifdef ALLEGRO_WINDOWS</span></div><div class="line"><a name="l00283"></a><span class="lineno"> 283</span> <span class="keyword">static</span> AGL_GetExtensionsStringARB_t __wglGetExtensionsStringARB = NULL;</div><div class="line"><a name="l00284"></a><span class="lineno"> 284</span> <span class="keyword">static</span> HDC __hdc = NULL;</div><div class="line"><a name="l00285"></a><span class="lineno"> 285</span> <span class="preprocessor">#elif defined ALLEGRO_UNIX</span></div><div class="line"><a name="l00286"></a><span class="lineno"> 286</span> <span class="preprocessor">#include <xalleg.h></span></div><div class="line"><a name="l00287"></a><span class="lineno"> 287</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00288"></a><span class="lineno"> 288</span> </div><div class="line"><a name="l00289"></a><span class="lineno"> 289</span> </div><div class="line"><a name="l00290"></a><span class="lineno"> 290</span> <span class="comment">/* int allegro_gl_is_extension_supported(AL_CONST char *extension) */</span></div><div class="line"><a name="l00306"></a><span class="lineno"><a class="line" href="group__extensions.html#ga7351f56ea1c4f4665193fc3bf547ff0a"> 306</a></span> <span class="keywordtype">int</span> <a class="code" href="group__extensions.html#ga7351f56ea1c4f4665193fc3bf547ff0a">allegro_gl_is_extension_supported</a>(AL_CONST <span class="keywordtype">char</span> *extension)</div><div class="line"><a name="l00307"></a><span class="lineno"> 307</span> {</div><div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  <span class="keywordtype">int</span> ret;</div><div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  </div><div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  <span class="keywordflow">if</span> (!__allegro_gl_valid_context)</div><div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  <span class="keywordflow">return</span> FALSE;</div><div class="line"><a name="l00312"></a><span class="lineno"> 312</span> </div><div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  <span class="keywordflow">if</span> (!glGetString(GL_EXTENSIONS))</div><div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  <span class="keywordflow">return</span> FALSE;</div><div class="line"><a name="l00315"></a><span class="lineno"> 315</span> </div><div class="line"><a name="l00316"></a><span class="lineno"> 316</span>  ret = __allegro_gl_look_for_an_extension(extension,</div><div class="line"><a name="l00317"></a><span class="lineno"> 317</span>  glGetString(GL_EXTENSIONS));</div><div class="line"><a name="l00318"></a><span class="lineno"> 318</span> </div><div class="line"><a name="l00319"></a><span class="lineno"> 319</span> <span class="preprocessor">#ifdef ALLEGRO_WINDOWS</span></div><div class="line"><a name="l00320"></a><span class="lineno"> 320</span>  <span class="keywordflow">if</span> (!ret && strncmp(extension, <span class="stringliteral">"WGL"</span>, 3) == 0) {</div><div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  <span class="keywordflow">if</span> (!__wglGetExtensionsStringARB || __hdc != __allegro_gl_hdc) {</div><div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  __wglGetExtensionsStringARB = (AGL_GetExtensionsStringARB_t)</div><div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  wglGetProcAddress(<span class="stringliteral">"wglGetExtensionsStringARB"</span>);</div><div class="line"><a name="l00324"></a><span class="lineno"> 324</span>  __hdc = __allegro_gl_hdc;</div><div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  }</div><div class="line"><a name="l00326"></a><span class="lineno"> 326</span>  <span class="keywordflow">if</span> (__wglGetExtensionsStringARB) {</div><div class="line"><a name="l00327"></a><span class="lineno"> 327</span>  ret = __allegro_gl_look_for_an_extension(extension,</div><div class="line"><a name="l00328"></a><span class="lineno"> 328</span>  (AL_CONST GLubyte*)__wglGetExtensionsStringARB(__allegro_gl_hdc));</div><div class="line"><a name="l00329"></a><span class="lineno"> 329</span>  }</div><div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  }</div><div class="line"><a name="l00331"></a><span class="lineno"> 331</span> <span class="preprocessor">#elif defined ALLEGRO_UNIX</span></div><div class="line"><a name="l00332"></a><span class="lineno"> 332</span>  <span class="keywordflow">if</span> (!ret && strncmp(extension, <span class="stringliteral">"GLX"</span>, 3) == 0) {</div><div class="line"><a name="l00333"></a><span class="lineno"> 333</span>  XLOCK();</div><div class="line"><a name="l00334"></a><span class="lineno"> 334</span>  ret = __allegro_gl_look_for_an_extension(extension,</div><div class="line"><a name="l00335"></a><span class="lineno"> 335</span>  (<span class="keyword">const</span> GLubyte*)glXQueryExtensionsString(_xwin.display,</div><div class="line"><a name="l00336"></a><span class="lineno"> 336</span>  _xwin.screen));</div><div class="line"><a name="l00337"></a><span class="lineno"> 337</span>  XUNLOCK();</div><div class="line"><a name="l00338"></a><span class="lineno"> 338</span>  }</div><div class="line"><a name="l00339"></a><span class="lineno"> 339</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00340"></a><span class="lineno"> 340</span> </div><div class="line"><a name="l00341"></a><span class="lineno"> 341</span>  <span class="keywordflow">return</span> ret;</div><div class="line"><a name="l00342"></a><span class="lineno"> 342</span> }</div><div class="line"><a name="l00343"></a><span class="lineno"> 343</span> </div><div class="line"><a name="l00344"></a><span class="lineno"> 344</span> </div><div class="line"><a name="l00345"></a><span class="lineno"> 345</span> </div><div class="line"><a name="l00346"></a><span class="lineno"> 346</span> <span class="comment">/* void * allegro_gl_get_proc_address(AL_CONST char *name) */</span></div><div class="line"><a name="l00372"></a><span class="lineno"><a class="line" href="group__extensions.html#gaa0c2cd7c4b4a94e8801af42a58356cc4"> 372</a></span> <span class="keywordtype">void</span> *<a class="code" href="group__extensions.html#gaa0c2cd7c4b4a94e8801af42a58356cc4">allegro_gl_get_proc_address</a>(AL_CONST <span class="keywordtype">char</span> *name)</div><div class="line"><a name="l00373"></a><span class="lineno"> 373</span> {</div><div class="line"><a name="l00374"></a><span class="lineno"> 374</span>  <span class="keywordtype">void</span> *symbol = NULL;</div><div class="line"><a name="l00375"></a><span class="lineno"> 375</span> <span class="preprocessor">#ifdef ALLEGRO_MACOSX</span></div><div class="line"><a name="l00376"></a><span class="lineno"> 376</span>  CFStringRef <span class="keyword">function</span>;</div><div class="line"><a name="l00377"></a><span class="lineno"> 377</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00378"></a><span class="lineno"> 378</span> </div><div class="line"><a name="l00379"></a><span class="lineno"> 379</span>  <span class="keywordflow">if</span> (!__allegro_gl_valid_context)</div><div class="line"><a name="l00380"></a><span class="lineno"> 380</span>  <span class="keywordflow">return</span> NULL;</div><div class="line"><a name="l00381"></a><span class="lineno"> 381</span> </div><div class="line"><a name="l00382"></a><span class="lineno"> 382</span> <span class="preprocessor">#ifdef ALLEGROGL_GENERIC_DRIVER</span></div><div class="line"><a name="l00383"></a><span class="lineno"> 383</span>  <span class="comment">/* AMesa provides a function to get a proc address. It does</span></div><div class="line"><a name="l00384"></a><span class="lineno"> 384</span> <span class="comment"> * not emulate dynamic linking of course...</span></div><div class="line"><a name="l00385"></a><span class="lineno"> 385</span> <span class="comment"> */</span></div><div class="line"><a name="l00386"></a><span class="lineno"> 386</span>  symbol = AMesaGetProcAddress(name);</div><div class="line"><a name="l00387"></a><span class="lineno"> 387</span> </div><div class="line"><a name="l00388"></a><span class="lineno"> 388</span> <span class="preprocessor">#elif defined ALLEGRO_WINDOWS</span></div><div class="line"><a name="l00389"></a><span class="lineno"> 389</span>  <span class="comment">/* For once Windows is the easiest platform to use :)</span></div><div class="line"><a name="l00390"></a><span class="lineno"> 390</span> <span class="comment"> * It provides a standardized way to get a function address</span></div><div class="line"><a name="l00391"></a><span class="lineno"> 391</span> <span class="comment"> * But of course there is a drawback : the symbol is only valid</span></div><div class="line"><a name="l00392"></a><span class="lineno"> 392</span> <span class="comment"> * under the current context :P</span></div><div class="line"><a name="l00393"></a><span class="lineno"> 393</span> <span class="comment"> */</span></div><div class="line"><a name="l00394"></a><span class="lineno"> 394</span>  symbol = wglGetProcAddress(name);</div><div class="line"><a name="l00395"></a><span class="lineno"> 395</span> <span class="preprocessor">#elif defined ALLEGRO_UNIX</span></div><div class="line"><a name="l00396"></a><span class="lineno"> 396</span>  <span class="keywordflow">if</span> (aglXGetProcAddress) {</div><div class="line"><a name="l00397"></a><span class="lineno"> 397</span>  <span class="comment">/* This is definitely the *good* way on Unix to get a GL proc</span></div><div class="line"><a name="l00398"></a><span class="lineno"> 398</span> <span class="comment"> * address. Unfortunately glXGetProcAddress is an extension</span></div><div class="line"><a name="l00399"></a><span class="lineno"> 399</span> <span class="comment"> * and may not be available on all platforms</span></div><div class="line"><a name="l00400"></a><span class="lineno"> 400</span> <span class="comment"> */</span></div><div class="line"><a name="l00401"></a><span class="lineno"> 401</span>  symbol = aglXGetProcAddress((<span class="keyword">const</span> GLubyte*)name);</div><div class="line"><a name="l00402"></a><span class="lineno"> 402</span>  }</div><div class="line"><a name="l00403"></a><span class="lineno"> 403</span> <span class="preprocessor">#elif defined ALLEGROGL_HAVE_DYNAMIC_LINK</span></div><div class="line"><a name="l00404"></a><span class="lineno"> 404</span>  <span class="keywordflow">else</span> {</div><div class="line"><a name="l00405"></a><span class="lineno"> 405</span>  <span class="comment">/* Hack if glXGetProcAddress is not available :</span></div><div class="line"><a name="l00406"></a><span class="lineno"> 406</span> <span class="comment"> * we try to find the symbol into libGL.so</span></div><div class="line"><a name="l00407"></a><span class="lineno"> 407</span> <span class="comment"> */</span></div><div class="line"><a name="l00408"></a><span class="lineno"> 408</span>  <span class="keywordflow">if</span> (__agl_handle) {</div><div class="line"><a name="l00409"></a><span class="lineno"> 409</span>  symbol = dlsym(__agl_handle, name);</div><div class="line"><a name="l00410"></a><span class="lineno"> 410</span>  }</div><div class="line"><a name="l00411"></a><span class="lineno"> 411</span>  }</div><div class="line"><a name="l00412"></a><span class="lineno"> 412</span> <span class="preprocessor">#elif defined ALLEGRO_MACOSX</span></div><div class="line"><a name="l00413"></a><span class="lineno"> 413</span>  <span class="keyword">function</span> = CFStringCreateWithCString(kCFAllocatorDefault, name,</div><div class="line"><a name="l00414"></a><span class="lineno"> 414</span>  kCFStringEncodingASCII);</div><div class="line"><a name="l00415"></a><span class="lineno"> 415</span>  <span class="keywordflow">if</span> (<span class="keyword">function</span>) {</div><div class="line"><a name="l00416"></a><span class="lineno"> 416</span>  symbol = CFBundleGetFunctionPointerForName(opengl_bundle_ref, <span class="keyword">function</span>);</div><div class="line"><a name="l00417"></a><span class="lineno"> 417</span>  CFRelease(<span class="keyword">function</span>);</div><div class="line"><a name="l00418"></a><span class="lineno"> 418</span>  }</div><div class="line"><a name="l00419"></a><span class="lineno"> 419</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00420"></a><span class="lineno"> 420</span>  <span class="comment">/* DOS does not support dynamic linking. If the function is not</span></div><div class="line"><a name="l00421"></a><span class="lineno"> 421</span> <span class="comment"> * available at build-time then it will not be available at run-time</span></div><div class="line"><a name="l00422"></a><span class="lineno"> 422</span> <span class="comment"> * Therefore we do not need to look for it...</span></div><div class="line"><a name="l00423"></a><span class="lineno"> 423</span> <span class="comment"> */</span></div><div class="line"><a name="l00424"></a><span class="lineno"> 424</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00425"></a><span class="lineno"> 425</span> </div><div class="line"><a name="l00426"></a><span class="lineno"> 426</span>  <span class="keywordflow">if</span> (!symbol) {</div><div class="line"><a name="l00427"></a><span class="lineno"> 427</span> </div><div class="line"><a name="l00428"></a><span class="lineno"> 428</span> <span class="preprocessor">#if defined ALLEGROGL_HAVE_DYNAMIC_LINK</span></div><div class="line"><a name="l00429"></a><span class="lineno"> 429</span>  <span class="keywordflow">if</span> (!aglXGetProcAddress) {</div><div class="line"><a name="l00430"></a><span class="lineno"> 430</span>  TRACE(PREFIX_W <span class="stringliteral">"get_proc_address: libdl::dlsym: %s\n"</span>,</div><div class="line"><a name="l00431"></a><span class="lineno"> 431</span>  dlerror());</div><div class="line"><a name="l00432"></a><span class="lineno"> 432</span>  }</div><div class="line"><a name="l00433"></a><span class="lineno"> 433</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00434"></a><span class="lineno"> 434</span>  </div><div class="line"><a name="l00435"></a><span class="lineno"> 435</span>  TRACE(PREFIX_W <span class="stringliteral">"get_proc_address : Unable to load symbol %s\n"</span>,</div><div class="line"><a name="l00436"></a><span class="lineno"> 436</span>  name);</div><div class="line"><a name="l00437"></a><span class="lineno"> 437</span>  }</div><div class="line"><a name="l00438"></a><span class="lineno"> 438</span>  <span class="keywordflow">else</span> {</div><div class="line"><a name="l00439"></a><span class="lineno"> 439</span>  TRACE(PREFIX_I <span class="stringliteral">"get_proc_address : Symbol %s successfully loaded\n"</span>,</div><div class="line"><a name="l00440"></a><span class="lineno"> 440</span>  name);</div><div class="line"><a name="l00441"></a><span class="lineno"> 441</span>  }</div><div class="line"><a name="l00442"></a><span class="lineno"> 442</span>  <span class="keywordflow">return</span> symbol;</div><div class="line"><a name="l00443"></a><span class="lineno"> 443</span> }</div><div class="line"><a name="l00444"></a><span class="lineno"> 444</span> </div><div class="line"><a name="l00445"></a><span class="lineno"> 445</span> </div><div class="line"><a name="l00446"></a><span class="lineno"> 446</span> </div><div class="line"><a name="l00447"></a><span class="lineno"> 447</span> <span class="comment">/* Fills in the AllegroGL info struct for blacklisting video cards.</span></div><div class="line"><a name="l00448"></a><span class="lineno"> 448</span> <span class="comment"> */</span></div><div class="line"><a name="l00449"></a><span class="lineno"> 449</span> <span class="keyword">static</span> <span class="keywordtype">void</span> __fill_in_info_struct(<span class="keyword">const</span> GLubyte *rendereru,</div><div class="line"><a name="l00450"></a><span class="lineno"> 450</span>  <span class="keyword">struct</span> allegro_gl_info *info) {</div><div class="line"><a name="l00451"></a><span class="lineno"> 451</span>  <span class="keyword">const</span> <span class="keywordtype">char</span> *renderer = (<span class="keyword">const</span> <span class="keywordtype">char</span>*)rendereru;</div><div class="line"><a name="l00452"></a><span class="lineno"> 452</span>  </div><div class="line"><a name="l00453"></a><span class="lineno"> 453</span>  <span class="comment">/* Some cards are "special"... */</span></div><div class="line"><a name="l00454"></a><span class="lineno"> 454</span>  <span class="keywordflow">if</span> (strstr(renderer, <span class="stringliteral">"3Dfx/Voodoo"</span>)) {</div><div class="line"><a name="l00455"></a><span class="lineno"> 455</span>  info->is_voodoo = 1;</div><div class="line"><a name="l00456"></a><span class="lineno"> 456</span>  }</div><div class="line"><a name="l00457"></a><span class="lineno"> 457</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (strstr(renderer, <span class="stringliteral">"Matrox G200"</span>)) {</div><div class="line"><a name="l00458"></a><span class="lineno"> 458</span>  info->is_matrox_g200 = 1;</div><div class="line"><a name="l00459"></a><span class="lineno"> 459</span>  }</div><div class="line"><a name="l00460"></a><span class="lineno"> 460</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (strstr(renderer, <span class="stringliteral">"RagePRO"</span>)) {</div><div class="line"><a name="l00461"></a><span class="lineno"> 461</span>  info->is_ati_rage_pro = 1;</div><div class="line"><a name="l00462"></a><span class="lineno"> 462</span>  }</div><div class="line"><a name="l00463"></a><span class="lineno"> 463</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (strstr(renderer, <span class="stringliteral">"RADEON 7000"</span>)) {</div><div class="line"><a name="l00464"></a><span class="lineno"> 464</span>  info->is_ati_radeon_7000 = 1;</div><div class="line"><a name="l00465"></a><span class="lineno"> 465</span>  }</div><div class="line"><a name="l00466"></a><span class="lineno"> 466</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (strstr(renderer, <span class="stringliteral">"Mesa DRI R200"</span>)) {</div><div class="line"><a name="l00467"></a><span class="lineno"> 467</span>  info->is_ati_r200_chip = 1;</div><div class="line"><a name="l00468"></a><span class="lineno"> 468</span>  }</div><div class="line"><a name="l00469"></a><span class="lineno"> 469</span> </div><div class="line"><a name="l00470"></a><span class="lineno"> 470</span>  <span class="keywordflow">if</span> ((strncmp(renderer, <span class="stringliteral">"3Dfx/Voodoo3 "</span>, 13) == 0)</div><div class="line"><a name="l00471"></a><span class="lineno"> 471</span>  || (strncmp(renderer, <span class="stringliteral">"3Dfx/Voodoo2 "</span>, 13) == 0) </div><div class="line"><a name="l00472"></a><span class="lineno"> 472</span>  || (strncmp(renderer, <span class="stringliteral">"3Dfx/Voodoo "</span>, 12) == 0)) {</div><div class="line"><a name="l00473"></a><span class="lineno"> 473</span>  info->is_voodoo3_and_under = 1;</div><div class="line"><a name="l00474"></a><span class="lineno"> 474</span>  }</div><div class="line"><a name="l00475"></a><span class="lineno"> 475</span> </div><div class="line"><a name="l00476"></a><span class="lineno"> 476</span>  <span class="comment">/* Read OpenGL properties */</span> </div><div class="line"><a name="l00477"></a><span class="lineno"> 477</span>  info->version = <a class="code" href="group__core.html#ga444d507eaeb5ba800787f6a81827615d">allegro_gl_opengl_version</a>();</div><div class="line"><a name="l00478"></a><span class="lineno"> 478</span> </div><div class="line"><a name="l00479"></a><span class="lineno"> 479</span>  <span class="keywordflow">return</span>;</div><div class="line"><a name="l00480"></a><span class="lineno"> 480</span> }</div><div class="line"><a name="l00481"></a><span class="lineno"> 481</span> </div><div class="line"><a name="l00482"></a><span class="lineno"> 482</span> </div><div class="line"><a name="l00483"></a><span class="lineno"> 483</span> </div><div class="line"><a name="l00484"></a><span class="lineno"> 484</span> <span class="comment">/* __allegro_gl_manage_extensions:</span></div><div class="line"><a name="l00485"></a><span class="lineno"> 485</span> <span class="comment"> * This functions fills the __allegro_gl_extensions structure and displays</span></div><div class="line"><a name="l00486"></a><span class="lineno"> 486</span> <span class="comment"> * on the log file which extensions are available</span></div><div class="line"><a name="l00487"></a><span class="lineno"> 487</span> <span class="comment"> */</span></div><div class="line"><a name="l00488"></a><span class="lineno"> 488</span> <span class="keywordtype">void</span> __allegro_gl_manage_extensions(<span class="keywordtype">void</span>)</div><div class="line"><a name="l00489"></a><span class="lineno"> 489</span> {</div><div class="line"><a name="l00490"></a><span class="lineno"> 490</span>  AL_CONST GLubyte *buf;</div><div class="line"><a name="l00491"></a><span class="lineno"> 491</span>  <span class="keywordtype">int</span> i;</div><div class="line"><a name="l00492"></a><span class="lineno"> 492</span> </div><div class="line"><a name="l00493"></a><span class="lineno"> 493</span> <span class="preprocessor">#ifdef ALLEGRO_MACOSX</span></div><div class="line"><a name="l00494"></a><span class="lineno"> 494</span>  CFURLRef bundle_url;</div><div class="line"><a name="l00495"></a><span class="lineno"> 495</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00496"></a><span class="lineno"> 496</span> </div><div class="line"><a name="l00497"></a><span class="lineno"> 497</span>  <span class="comment">/* Print out OpenGL extensions */</span></div><div class="line"><a name="l00498"></a><span class="lineno"> 498</span> <span class="preprocessor">#if LOGLEVEL >= 1</span></div><div class="line"><a name="l00499"></a><span class="lineno"> 499</span>  AGL_LOG(1, <span class="stringliteral">"OpenGL Extensions:\n"</span>);</div><div class="line"><a name="l00500"></a><span class="lineno"> 500</span>  __allegro_gl_print_extensions((AL_CONST <span class="keywordtype">char</span>*)</div><div class="line"><a name="l00501"></a><span class="lineno"> 501</span>  glGetString(GL_EXTENSIONS));</div><div class="line"><a name="l00502"></a><span class="lineno"> 502</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00503"></a><span class="lineno"> 503</span>  </div><div class="line"><a name="l00504"></a><span class="lineno"> 504</span>  <span class="comment">/* Print out GLU version */</span></div><div class="line"><a name="l00505"></a><span class="lineno"> 505</span>  buf = gluGetString(GLU_VERSION);</div><div class="line"><a name="l00506"></a><span class="lineno"> 506</span>  TRACE(PREFIX_I <span class="stringliteral">"GLU Version : %s\n"</span>, buf);</div><div class="line"><a name="l00507"></a><span class="lineno"> 507</span> </div><div class="line"><a name="l00508"></a><span class="lineno"> 508</span> <span class="preprocessor">#ifdef ALLEGROGL_HAVE_DYNAMIC_LINK</span></div><div class="line"><a name="l00509"></a><span class="lineno"> 509</span>  <span class="comment">/* Get glXGetProcAddress entry */</span></div><div class="line"><a name="l00510"></a><span class="lineno"> 510</span>  __agl_handle = dlopen(<span class="stringliteral">"libGL.so"</span>, RTLD_LAZY);</div><div class="line"><a name="l00511"></a><span class="lineno"> 511</span>  <span class="keywordflow">if</span> (__agl_handle) {</div><div class="line"><a name="l00512"></a><span class="lineno"> 512</span>  aglXGetProcAddress = (GLXGETPROCADDRESSARBPROC) dlsym(__agl_handle,</div><div class="line"><a name="l00513"></a><span class="lineno"> 513</span>  <span class="stringliteral">"glXGetProcAddressARB"</span>);</div><div class="line"><a name="l00514"></a><span class="lineno"> 514</span>  <span class="keywordflow">if</span> (!aglXGetProcAddress) {</div><div class="line"><a name="l00515"></a><span class="lineno"> 515</span>  aglXGetProcAddress = (GLXGETPROCADDRESSARBPROC) dlsym(__agl_handle,</div><div class="line"><a name="l00516"></a><span class="lineno"> 516</span>  <span class="stringliteral">"glXGetProcAddress"</span>);</div><div class="line"><a name="l00517"></a><span class="lineno"> 517</span>  }</div><div class="line"><a name="l00518"></a><span class="lineno"> 518</span>  }</div><div class="line"><a name="l00519"></a><span class="lineno"> 519</span>  <span class="keywordflow">else</span> {</div><div class="line"><a name="l00520"></a><span class="lineno"> 520</span>  TRACE(PREFIX_W <span class="stringliteral">"Failed to dlopen libGL.so : %s\n"</span>, dlerror());</div><div class="line"><a name="l00521"></a><span class="lineno"> 521</span>  }</div><div class="line"><a name="l00522"></a><span class="lineno"> 522</span>  TRACE(PREFIX_I <span class="stringliteral">"glXGetProcAddress Extension: %s\n"</span>,</div><div class="line"><a name="l00523"></a><span class="lineno"> 523</span>  aglXGetProcAddress ? <span class="stringliteral">"Supported"</span> : <span class="stringliteral">"Unsupported"</span>);</div><div class="line"><a name="l00524"></a><span class="lineno"> 524</span> <span class="preprocessor">#elif defined ALLEGRO_UNIX</span></div><div class="line"><a name="l00525"></a><span class="lineno"> 525</span> <span class="preprocessor">#ifdef ALLEGROGL_GLXGETPROCADDRESSARB</span></div><div class="line"><a name="l00526"></a><span class="lineno"> 526</span>  TRACE(PREFIX_I <span class="stringliteral">"glXGetProcAddressARB Extension: supported\n"</span>);</div><div class="line"><a name="l00527"></a><span class="lineno"> 527</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00528"></a><span class="lineno"> 528</span>  TRACE(PREFIX_I <span class="stringliteral">"glXGetProcAddress Extension: supported\n"</span>);</div><div class="line"><a name="l00529"></a><span class="lineno"> 529</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00530"></a><span class="lineno"> 530</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00531"></a><span class="lineno"> 531</span>  </div><div class="line"><a name="l00532"></a><span class="lineno"> 532</span> <span class="preprocessor">#ifdef ALLEGRO_MACOSX</span></div><div class="line"><a name="l00533"></a><span class="lineno"> 533</span>  bundle_url = CFURLCreateWithFileSystemPath(kCFAllocatorDefault,</div><div class="line"><a name="l00534"></a><span class="lineno"> 534</span>  CFSTR(<span class="stringliteral">"/System/Library/Frameworks/OpenGL.framework"</span>),</div><div class="line"><a name="l00535"></a><span class="lineno"> 535</span>  kCFURLPOSIXPathStyle, <span class="keyword">true</span>);</div><div class="line"><a name="l00536"></a><span class="lineno"> 536</span>  opengl_bundle_ref = CFBundleCreate(kCFAllocatorDefault, bundle_url);</div><div class="line"><a name="l00537"></a><span class="lineno"> 537</span>  CFRelease(bundle_url);</div><div class="line"><a name="l00538"></a><span class="lineno"> 538</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00539"></a><span class="lineno"> 539</span> </div><div class="line"><a name="l00540"></a><span class="lineno"> 540</span>  __fill_in_info_struct(glGetString(GL_RENDERER), &allegro_gl_info);</div><div class="line"><a name="l00541"></a><span class="lineno"> 541</span> </div><div class="line"><a name="l00542"></a><span class="lineno"> 542</span>  <span class="comment">/* Load extensions */</span></div><div class="line"><a name="l00543"></a><span class="lineno"> 543</span>  agl_extension_table = __allegro_gl_create_extensions();</div><div class="line"><a name="l00544"></a><span class="lineno"> 544</span>  __allegro_gl_load_extensions(agl_extension_table);</div><div class="line"><a name="l00545"></a><span class="lineno"> 545</span>  __allegro_gl_set_extensions(agl_extension_table);</div><div class="line"><a name="l00546"></a><span class="lineno"> 546</span>  </div><div class="line"><a name="l00547"></a><span class="lineno"> 547</span>  <span class="keywordflow">for</span> (i = 0; i < 5; i++) {</div><div class="line"><a name="l00548"></a><span class="lineno"> 548</span>  __allegro_gl_texture_read_format[i] = -1;</div><div class="line"><a name="l00549"></a><span class="lineno"> 549</span>  __allegro_gl_texture_components[i] = GL_RGB;</div><div class="line"><a name="l00550"></a><span class="lineno"> 550</span>  }</div><div class="line"><a name="l00551"></a><span class="lineno"> 551</span>  __allegro_gl_texture_read_format[3] = GL_UNSIGNED_BYTE;</div><div class="line"><a name="l00552"></a><span class="lineno"> 552</span>  __allegro_gl_texture_read_format[4] = GL_UNSIGNED_BYTE;</div><div class="line"><a name="l00553"></a><span class="lineno"> 553</span>  __allegro_gl_texture_components[4] = GL_RGBA;</div><div class="line"><a name="l00554"></a><span class="lineno"> 554</span> </div><div class="line"><a name="l00555"></a><span class="lineno"> 555</span>  </div><div class="line"><a name="l00556"></a><span class="lineno"> 556</span>  <span class="comment">/* Get extension info for the rest of the lib */</span></div><div class="line"><a name="l00557"></a><span class="lineno"> 557</span> <span class="preprocessor"># define AGL_EXT(name, ver) { \</span></div><div class="line"><a name="l00558"></a><span class="lineno"> 558</span> <span class="preprocessor"> allegro_gl_extensions_GL.name = \</span></div><div class="line"><a name="l00559"></a><span class="lineno"> 559</span> <span class="preprocessor"> allegro_gl_is_extension_supported("GL_" #name) \</span></div><div class="line"><a name="l00560"></a><span class="lineno"> 560</span> <span class="preprocessor"> || (allegro_gl_info.version >= ver && ver > 0); \</span></div><div class="line"><a name="l00561"></a><span class="lineno"> 561</span> <span class="preprocessor"> }</span></div><div class="line"><a name="l00562"></a><span class="lineno"> 562</span> <span class="preprocessor"># include "allegrogl/GLext/gl_ext_list.h"</span></div><div class="line"><a name="l00563"></a><span class="lineno"> 563</span> <span class="preprocessor"># undef AGL_EXT</span></div><div class="line"><a name="l00564"></a><span class="lineno"> 564</span> </div><div class="line"><a name="l00565"></a><span class="lineno"> 565</span> <span class="preprocessor">#ifdef ALLEGRO_UNIX</span></div><div class="line"><a name="l00566"></a><span class="lineno"> 566</span> <span class="preprocessor"># define AGL_EXT(name, ver) { \</span></div><div class="line"><a name="l00567"></a><span class="lineno"> 567</span> <span class="preprocessor"> allegro_gl_extensions_GLX.name = \</span></div><div class="line"><a name="l00568"></a><span class="lineno"> 568</span> <span class="preprocessor"> allegro_gl_is_extension_supported("GLX_" #name) \</span></div><div class="line"><a name="l00569"></a><span class="lineno"> 569</span> <span class="preprocessor"> || (allegro_gl_info.version >= ver && ver > 0); \</span></div><div class="line"><a name="l00570"></a><span class="lineno"> 570</span> <span class="preprocessor"> }</span></div><div class="line"><a name="l00571"></a><span class="lineno"> 571</span> <span class="preprocessor"># include "allegrogl/GLext/glx_ext_list.h"</span></div><div class="line"><a name="l00572"></a><span class="lineno"> 572</span> <span class="preprocessor"># undef AGL_EXT</span></div><div class="line"><a name="l00573"></a><span class="lineno"> 573</span> <span class="preprocessor">#elif defined ALLEGRO_WINDOWS</span></div><div class="line"><a name="l00574"></a><span class="lineno"> 574</span> <span class="preprocessor"># define AGL_EXT(name, ver) { \</span></div><div class="line"><a name="l00575"></a><span class="lineno"> 575</span> <span class="preprocessor"> allegro_gl_extensions_WGL.name = \</span></div><div class="line"><a name="l00576"></a><span class="lineno"> 576</span> <span class="preprocessor"> allegro_gl_is_extension_supported("WGL_" #name) \</span></div><div class="line"><a name="l00577"></a><span class="lineno"> 577</span> <span class="preprocessor"> || (allegro_gl_info.version >= ver && ver > 0); \</span></div><div class="line"><a name="l00578"></a><span class="lineno"> 578</span> <span class="preprocessor"> }</span></div><div class="line"><a name="l00579"></a><span class="lineno"> 579</span> <span class="preprocessor"># include "allegrogl/GLext/wgl_ext_list.h"</span></div><div class="line"><a name="l00580"></a><span class="lineno"> 580</span> <span class="preprocessor"># undef AGL_EXT</span></div><div class="line"><a name="l00581"></a><span class="lineno"> 581</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00582"></a><span class="lineno"> 582</span>  </div><div class="line"><a name="l00583"></a><span class="lineno"> 583</span>  <span class="comment">/* Get number of texture units */</span></div><div class="line"><a name="l00584"></a><span class="lineno"> 584</span>  <span class="keywordflow">if</span> (<a class="code" href="group__extensions.html#ga7492f6f6acc608789210560ee63e5436">allegro_gl_extensions_GL</a>.ARB_multitexture) {</div><div class="line"><a name="l00585"></a><span class="lineno"> 585</span>  glGetIntegerv(GL_MAX_TEXTURE_UNITS,</div><div class="line"><a name="l00586"></a><span class="lineno"> 586</span>  (GLint*)&allegro_gl_info.num_texture_units);</div><div class="line"><a name="l00587"></a><span class="lineno"> 587</span>  }</div><div class="line"><a name="l00588"></a><span class="lineno"> 588</span>  <span class="keywordflow">else</span> {</div><div class="line"><a name="l00589"></a><span class="lineno"> 589</span>  allegro_gl_info.num_texture_units = 1;</div><div class="line"><a name="l00590"></a><span class="lineno"> 590</span>  }</div><div class="line"><a name="l00591"></a><span class="lineno"> 591</span> </div><div class="line"><a name="l00592"></a><span class="lineno"> 592</span>  <span class="comment">/* Get max texture size */</span></div><div class="line"><a name="l00593"></a><span class="lineno"> 593</span>  glGetIntegerv(GL_MAX_TEXTURE_SIZE,</div><div class="line"><a name="l00594"></a><span class="lineno"> 594</span>  (GLint*)&allegro_gl_info.max_texture_size);</div><div class="line"><a name="l00595"></a><span class="lineno"> 595</span> </div><div class="line"><a name="l00596"></a><span class="lineno"> 596</span>  <span class="comment">/* Note: Voodoo (even V5) don't seem to correctly support</span></div><div class="line"><a name="l00597"></a><span class="lineno"> 597</span> <span class="comment"> * packed pixel formats. Disabling them for those cards.</span></div><div class="line"><a name="l00598"></a><span class="lineno"> 598</span> <span class="comment"> */</span></div><div class="line"><a name="l00599"></a><span class="lineno"> 599</span>  <a class="code" href="group__extensions.html#ga7492f6f6acc608789210560ee63e5436">allegro_gl_extensions_GL</a>.EXT_packed_pixels &= !allegro_gl_info.is_voodoo;</div><div class="line"><a name="l00600"></a><span class="lineno"> 600</span> </div><div class="line"><a name="l00601"></a><span class="lineno"> 601</span>  </div><div class="line"><a name="l00602"></a><span class="lineno"> 602</span>  <span class="keywordflow">if</span> (<a class="code" href="group__extensions.html#ga7492f6f6acc608789210560ee63e5436">allegro_gl_extensions_GL</a>.EXT_packed_pixels) {</div><div class="line"><a name="l00603"></a><span class="lineno"> 603</span> </div><div class="line"><a name="l00604"></a><span class="lineno"> 604</span>  AGL_LOG(1, <span class="stringliteral">"Packed Pixels formats available\n"</span>);</div><div class="line"><a name="l00605"></a><span class="lineno"> 605</span> </div><div class="line"><a name="l00606"></a><span class="lineno"> 606</span>  <span class="comment">/* XXX On NV cards, we want to use BGRA instead of RGBA for speed */</span></div><div class="line"><a name="l00607"></a><span class="lineno"> 607</span>  <span class="comment">/* Fills the __allegro_gl_texture_format array */</span></div><div class="line"><a name="l00608"></a><span class="lineno"> 608</span>  __allegro_gl_texture_read_format[0] = GL_UNSIGNED_BYTE_3_3_2;</div><div class="line"><a name="l00609"></a><span class="lineno"> 609</span>  __allegro_gl_texture_read_format[1] = GL_UNSIGNED_SHORT_5_5_5_1;</div><div class="line"><a name="l00610"></a><span class="lineno"> 610</span>  __allegro_gl_texture_read_format[2] = GL_UNSIGNED_SHORT_5_6_5;</div><div class="line"><a name="l00611"></a><span class="lineno"> 611</span>  }</div><div class="line"><a name="l00612"></a><span class="lineno"> 612</span> </div><div class="line"><a name="l00613"></a><span class="lineno"> 613</span>  <span class="comment">/* NVidia and ATI cards expose OpenGL 2.0 but often don't accelerate</span></div><div class="line"><a name="l00614"></a><span class="lineno"> 614</span> <span class="comment"> * non-power-of-2 textures. This check is how you verify that NP2</span></div><div class="line"><a name="l00615"></a><span class="lineno"> 615</span> <span class="comment"> * textures are hardware accelerated or not.</span></div><div class="line"><a name="l00616"></a><span class="lineno"> 616</span> <span class="comment"> * We should clobber the NPOT support if it's not accelerated.</span></div><div class="line"><a name="l00617"></a><span class="lineno"> 617</span> <span class="comment"> */</span></div><div class="line"><a name="l00618"></a><span class="lineno"> 618</span>  { <span class="keyword">const</span> <span class="keywordtype">char</span> *vendor = (<span class="keyword">const</span> <span class="keywordtype">char</span>*)glGetString(GL_VENDOR);</div><div class="line"><a name="l00619"></a><span class="lineno"> 619</span>  <span class="keywordflow">if</span> (strstr(vendor, <span class="stringliteral">"NVIDIA Corporation"</span>)) {</div><div class="line"><a name="l00620"></a><span class="lineno"> 620</span>  <span class="keywordflow">if</span> (!<a class="code" href="group__extensions.html#ga7492f6f6acc608789210560ee63e5436">allegro_gl_extensions_GL</a>.NV_fragment_program2</div><div class="line"><a name="l00621"></a><span class="lineno"> 621</span>  || !<a class="code" href="group__extensions.html#ga7492f6f6acc608789210560ee63e5436">allegro_gl_extensions_GL</a>.NV_vertex_program3) {</div><div class="line"><a name="l00622"></a><span class="lineno"> 622</span>  <a class="code" href="group__extensions.html#ga7492f6f6acc608789210560ee63e5436">allegro_gl_extensions_GL</a>.ARB_texture_non_power_of_two = 0;</div><div class="line"><a name="l00623"></a><span class="lineno"> 623</span>  }</div><div class="line"><a name="l00624"></a><span class="lineno"> 624</span>  }</div><div class="line"><a name="l00625"></a><span class="lineno"> 625</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (strstr(vendor, <span class="stringliteral">"ATI Technologies"</span>)) {</div><div class="line"><a name="l00626"></a><span class="lineno"> 626</span>  <span class="keywordflow">if</span> (!strstr((<span class="keyword">const</span> <span class="keywordtype">char</span>*)glGetString(GL_EXTENSIONS),</div><div class="line"><a name="l00627"></a><span class="lineno"> 627</span>  <span class="stringliteral">"GL_ARB_texture_non_power_of_two"</span>)</div><div class="line"><a name="l00628"></a><span class="lineno"> 628</span>  && allegro_gl_info.version >= 2.0f) {</div><div class="line"><a name="l00629"></a><span class="lineno"> 629</span>  <a class="code" href="group__extensions.html#ga7492f6f6acc608789210560ee63e5436">allegro_gl_extensions_GL</a>.ARB_texture_non_power_of_two = 0;</div><div class="line"><a name="l00630"></a><span class="lineno"> 630</span>  }</div><div class="line"><a name="l00631"></a><span class="lineno"> 631</span>  }</div><div class="line"><a name="l00632"></a><span class="lineno"> 632</span>  }</div><div class="line"><a name="l00633"></a><span class="lineno"> 633</span> }</div><div class="line"><a name="l00634"></a><span class="lineno"> 634</span> </div><div class="line"><a name="l00635"></a><span class="lineno"> 635</span> </div><div class="line"><a name="l00636"></a><span class="lineno"> 636</span> </div><div class="line"><a name="l00637"></a><span class="lineno"> 637</span> <span class="comment">/* __allegro_gl_print_extensions:</span></div><div class="line"><a name="l00638"></a><span class="lineno"> 638</span> <span class="comment"> * Given a string containing extensions (i.e. a NULL terminated string where</span></div><div class="line"><a name="l00639"></a><span class="lineno"> 639</span> <span class="comment"> * each extension are separated by a space and which names do not contain any</span></div><div class="line"><a name="l00640"></a><span class="lineno"> 640</span> <span class="comment"> * space)</span></div><div class="line"><a name="l00641"></a><span class="lineno"> 641</span> <span class="comment"> */</span></div><div class="line"><a name="l00642"></a><span class="lineno"> 642</span> <span class="keywordtype">void</span> __allegro_gl_print_extensions(AL_CONST <span class="keywordtype">char</span> * extension)</div><div class="line"><a name="l00643"></a><span class="lineno"> 643</span> {</div><div class="line"><a name="l00644"></a><span class="lineno"> 644</span>  <span class="keywordtype">char</span> buf[80];</div><div class="line"><a name="l00645"></a><span class="lineno"> 645</span>  <span class="keywordtype">char</span>* start;</div><div class="line"><a name="l00646"></a><span class="lineno"> 646</span> </div><div class="line"><a name="l00647"></a><span class="lineno"> 647</span>  <span class="keywordflow">while</span> (*extension != <span class="charliteral">'\0'</span>) {</div><div class="line"><a name="l00648"></a><span class="lineno"> 648</span>  start = buf;</div><div class="line"><a name="l00649"></a><span class="lineno"> 649</span>  strncpy(buf, extension, 80);</div><div class="line"><a name="l00650"></a><span class="lineno"> 650</span>  <span class="keywordflow">while</span> ((*start != <span class="charliteral">' '</span>) && (*start != <span class="charliteral">'\0'</span>)) {</div><div class="line"><a name="l00651"></a><span class="lineno"> 651</span>  extension++;</div><div class="line"><a name="l00652"></a><span class="lineno"> 652</span>  start++;</div><div class="line"><a name="l00653"></a><span class="lineno"> 653</span>  }</div><div class="line"><a name="l00654"></a><span class="lineno"> 654</span>  *start = <span class="charliteral">'\0'</span>;</div><div class="line"><a name="l00655"></a><span class="lineno"> 655</span>  extension ++;</div><div class="line"><a name="l00656"></a><span class="lineno"> 656</span>  TRACE(PREFIX_I <span class="stringliteral">"%s\n"</span>, buf);</div><div class="line"><a name="l00657"></a><span class="lineno"> 657</span>  }</div><div class="line"><a name="l00658"></a><span class="lineno"> 658</span> }</div><div class="line"><a name="l00659"></a><span class="lineno"> 659</span> </div><div class="line"><a name="l00660"></a><span class="lineno"> 660</span> </div><div class="line"><a name="l00661"></a><span class="lineno"> 661</span> </div><div class="line"><a name="l00662"></a><span class="lineno"> 662</span> <span class="keywordtype">void</span> __allegro_gl_unmanage_extensions() {</div><div class="line"><a name="l00663"></a><span class="lineno"> 663</span>  __allegro_gl_destroy_extensions(agl_extension_table);</div><div class="line"><a name="l00664"></a><span class="lineno"> 664</span> <span class="preprocessor">#ifdef ALLEGRO_MACOSX</span></div><div class="line"><a name="l00665"></a><span class="lineno"> 665</span>  CFRelease(opengl_bundle_ref);</div><div class="line"><a name="l00666"></a><span class="lineno"> 666</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00667"></a><span class="lineno"> 667</span> <span class="preprocessor">#ifdef ALLEGROGL_HAVE_DYNAMIC_LINK</span></div><div class="line"><a name="l00668"></a><span class="lineno"> 668</span>  <span class="keywordflow">if</span> (__agl_handle) {</div><div class="line"><a name="l00669"></a><span class="lineno"> 669</span>  dlclose(__agl_handle);</div><div class="line"><a name="l00670"></a><span class="lineno"> 670</span>  __agl_handle = NULL;</div><div class="line"><a name="l00671"></a><span class="lineno"> 671</span>  }</div><div class="line"><a name="l00672"></a><span class="lineno"> 672</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00673"></a><span class="lineno"> 673</span> }</div><div class="line"><a name="l00674"></a><span class="lineno"> 674</span> </div><div class="ttc" id="group__core_html_ga444d507eaeb5ba800787f6a81827615d"><div class="ttname"><a href="group__core.html#ga444d507eaeb5ba800787f6a81827615d">allegro_gl_opengl_version</a></div><div class="ttdeci">float allegro_gl_opengl_version(void)</div><div class="ttdoc">Returns the OpenGL version number of the client (the computer the program is running on)...</div><div class="ttdef"><b>Definition:</b> <a href="alleggl_8c_source.html#l00971">alleggl.c:971</a></div></div>
<div class="ttc" id="group__extensions_html_gaa0c2cd7c4b4a94e8801af42a58356cc4"><div class="ttname"><a href="group__extensions.html#gaa0c2cd7c4b4a94e8801af42a58356cc4">allegro_gl_get_proc_address</a></div><div class="ttdeci">void * allegro_gl_get_proc_address(AL_CONST char *name)</div><div class="ttdoc">Helper to get the address of an OpenGL symbol. </div><div class="ttdef"><b>Definition:</b> <a href="glext_8c_source.html#l00372">glext.c:372</a></div></div>
<div class="ttc" id="group__extensions_html_ga7492f6f6acc608789210560ee63e5436"><div class="ttname"><a href="group__extensions.html#ga7492f6f6acc608789210560ee63e5436">allegro_gl_extensions_GL</a></div><div class="ttdeci">struct AGL_EXTENSION_LIST_GL allegro_gl_extensions_GL</div><div class="ttdoc">List of OpenGL extensions supported by AllegroGL. </div><div class="ttdef"><b>Definition:</b> <a href="glext_8c_source.html#l00055">glext.c:55</a></div></div>
<div class="ttc" id="group__extensions_html_ga2d6ebb26eec58470e4242b750656268b"><div class="ttname"><a href="group__extensions.html#ga2d6ebb26eec58470e4242b750656268b">agl_extension_table</a></div><div class="ttdeci">AGL_EXT * agl_extension_table</div><div class="ttdoc">List of GLX extensions supported by AllegroGL. </div><div class="ttdef"><b>Definition:</b> <a href="glext_8c_source.html#l00082">glext.c:82</a></div></div>
<div class="ttc" id="group__extensions_html_ga7351f56ea1c4f4665193fc3bf547ff0a"><div class="ttname"><a href="group__extensions.html#ga7351f56ea1c4f4665193fc3bf547ff0a">allegro_gl_is_extension_supported</a></div><div class="ttdeci">int allegro_gl_is_extension_supported(AL_CONST char *extension)</div><div class="ttdoc">This function is an helper to determine whether an OpenGL extension is available or not...</div><div class="ttdef"><b>Definition:</b> <a href="glext_8c_source.html#l00306">glext.c:306</a></div></div>
<div class="ttc" id="alleggl_8h_html"><div class="ttname"><a href="alleggl_8h.html">alleggl.h</a></div><div class="ttdoc">Main header file for AllegroGL. </div></div>
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