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annotate src/video/maccommon/SDL_macgl.c @ 1927:aeb8263d377a

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OpenGL renderer is feature complete! Dynamically load GL functions in the OpenGL renderer.
author Sam Lantinga <slouken@libsdl.org>
date Sat, 22 Jul 2006 23:04:41 +0000
parents c121d94672cb
children
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 Sam Lantinga
0
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 of the License, or (at your option) any later version.
0
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
0
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14
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15 You should have received a copy of the GNU Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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23
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24 /* AGL implementation of SDL OpenGL support */
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25
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26 #include "SDL_lowvideo.h"
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27 #include "SDL_macgl_c.h"
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28 #include "SDL_loadso.h"
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29
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30
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31 /* krat: adding OpenGL support */
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32 int
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33 Mac_GL_Init(_THIS)
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34 {
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35 #if SDL_VIDEO_OPENGL
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36 AGLPixelFormat format;
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37 int i = 0;
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38 GLint attributes[26]; /* 26 is max possible in this setup */
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39 GLboolean noerr;
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40
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41 /* load the gl driver from a default path */
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42 if (!this->gl_config.driver_loaded) {
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43 /* no driver has been loaded, use default (ourselves) */
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44 if (Mac_GL_LoadLibrary(this, NULL) < 0) {
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45 return (-1);
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46 }
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47 }
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48
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49 attributes[i++] = AGL_RGBA;
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50 if (this->gl_config.red_size != 0 &&
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51 this->gl_config.blue_size != 0 && this->gl_config.green_size != 0) {
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52 attributes[i++] = AGL_RED_SIZE;
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53 attributes[i++] = this->gl_config.red_size;
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54 attributes[i++] = AGL_GREEN_SIZE;
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55 attributes[i++] = this->gl_config.green_size;
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56 attributes[i++] = AGL_BLUE_SIZE;
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57 attributes[i++] = this->gl_config.blue_size;
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58 attributes[i++] = AGL_ALPHA_SIZE;
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59 attributes[i++] = this->gl_config.alpha_size;
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60 }
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61 if (this->gl_config.double_buffer) {
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62 attributes[i++] = AGL_DOUBLEBUFFER;
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63 }
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64 if (this->gl_config.depth_size != 0) {
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65 attributes[i++] = AGL_DEPTH_SIZE;
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66 attributes[i++] = this->gl_config.depth_size;
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67 }
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68 if (this->gl_config.stencil_size != 0) {
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69 attributes[i++] = AGL_STENCIL_SIZE;
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70 attributes[i++] = this->gl_config.stencil_size;
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71 }
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72 if (this->gl_config.accum_red_size != 0 &&
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73 this->gl_config.accum_blue_size != 0 &&
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74 this->gl_config.accum_green_size != 0) {
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75
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76 attributes[i++] = AGL_ACCUM_RED_SIZE;
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77 attributes[i++] = this->gl_config.accum_red_size;
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78 attributes[i++] = AGL_ACCUM_GREEN_SIZE;
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79 attributes[i++] = this->gl_config.accum_green_size;
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80 attributes[i++] = AGL_ACCUM_BLUE_SIZE;
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81 attributes[i++] = this->gl_config.accum_blue_size;
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82 attributes[i++] = AGL_ACCUM_ALPHA_SIZE;
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83 attributes[i++] = this->gl_config.accum_alpha_size;
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84 }
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85 if (this->gl_config.stereo) {
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86 attributes[i++] = AGL_STEREO;
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87 }
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88 #if defined(AGL_SAMPLE_BUFFERS_ARB) && defined(AGL_SAMPLES_ARB)
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89 if (this->gl_config.multisamplebuffers != 0) {
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90 attributes[i++] = AGL_SAMPLE_BUFFERS_ARB;
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91 attributes[i++] = this->gl_config.multisamplebuffers;
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92 }
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93 if (this->gl_config.multisamplesamples != 0) {
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94 attributes[i++] = AGL_SAMPLES_ARB;
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95 attributes[i++] = this->gl_config.multisamplesamples;
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96 }
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97 #endif
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98 if (this->gl_config.accelerated > 0) {
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99 attributes[i++] = AGL_ACCELERATED;
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100 attributes[i++] = AGL_NO_RECOVERY;
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101 }
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102
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103 attributes[i++] = AGL_ALL_RENDERERS;
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104 attributes[i] = AGL_NONE;
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105
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106 format = aglChoosePixelFormat(NULL, 0, attributes);
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107 if (format == NULL) {
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108 SDL_SetError("Couldn't match OpenGL desired format");
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109 return (-1);
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110 }
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111
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112 glContext = aglCreateContext(format, NULL);
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113 if (glContext == NULL) {
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114 SDL_SetError("Couldn't create OpenGL context");
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115 return (-1);
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116 }
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117 aglDestroyPixelFormat(format);
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118
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119 #if TARGET_API_MAC_CARBON
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120 noerr = aglSetDrawable(glContext, GetWindowPort(SDL_Window));
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121 #else
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122 noerr = aglSetDrawable(glContext, (AGLDrawable) SDL_Window);
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123 #endif
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124
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125 if (!noerr) {
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126 SDL_SetError("Unable to bind GL context to window");
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127 return (-1);
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128 }
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129 return (0);
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130 #else
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131 SDL_SetError("OpenGL support not configured");
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132 return (-1);
0
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133 #endif
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134 }
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135
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136 void
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137 Mac_GL_Quit(_THIS)
0
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138 {
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139 #if SDL_VIDEO_OPENGL
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140 if (glContext != NULL) {
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141 aglSetCurrentContext(NULL);
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142 aglSetDrawable(glContext, NULL);
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143 aglDestroyContext(glContext);
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144 glContext = NULL;
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145 }
0
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146 #endif
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147 }
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148
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149 #if SDL_VIDEO_OPENGL
0
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150
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151 /* Make the current context active */
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152 int
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153 Mac_GL_MakeCurrent(_THIS)
0
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154 {
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155 int retval;
0
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156
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157 retval = 0;
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158 if (!aglSetCurrentContext(glContext)) {
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159 SDL_SetError("Unable to make GL context current");
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160 retval = -1;
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161 }
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162 return (retval);
0
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163 }
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164
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165 void
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166 Mac_GL_SwapBuffers(_THIS)
0
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167 {
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168 aglSwapBuffers(glContext);
0
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169 }
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170
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171 int
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172 Mac_GL_LoadLibrary(_THIS, const char *location)
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173 {
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174 if (location == NULL)
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175 #if __MACH__
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176 location = "/System/Library/Frameworks/OpenGL.framework/OpenGL";
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177 #else
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178 location = "OpenGLLibrary";
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179 #endif
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180
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181 this->hidden->libraryHandle = SDL_LoadObject(location);
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182
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183 this->gl_config.driver_loaded = 1;
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184 return (this->hidden->libraryHandle != NULL) ? 0 : -1;
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185 }
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186
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187 void
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188 Mac_GL_UnloadLibrary(_THIS)
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189 {
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190 SDL_UnloadObject(this->hidden->libraryHandle);
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191
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192 this->hidden->libraryHandle = NULL;
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193 this->gl_config.driver_loaded = 0;
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194 }
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195
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196 void *
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197 Mac_GL_GetProcAddress(_THIS, const char *proc)
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198 {
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199 return SDL_LoadFunction(this->hidden->libraryHandle, proc);
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200 }
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201
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202 #endif /* SDL_VIDEO_OPENGL */
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203 /* vi: set ts=4 sw=4 expandtab: */