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annotate src/video/directfb/SDL_DirectFB_opengl.c @ 4763:518d1679d2d0

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Merged Daniel's Google Summer of Code work from SDL-gsoc2010_IME
author Sam Lantinga <slouken@libsdl.org>
date Sun, 22 Aug 2010 12:39:27 -0700
parents b196d2758026
children 164f20ba08eb
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2010 Sam Lantinga
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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.
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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.
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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 #include "SDL_DirectFB_video.h"
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25
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26 #if SDL_DIRECTFB_OPENGL
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27
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28 struct SDL_GLDriverData
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29 {
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30 int gl_active; /* to stop switching drivers while we have a valid context */
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31 int initialized;
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32 DirectFB_GLContext *firstgl; /* linked list */
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33
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34 /* OpenGL */
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35 void (*glFinish) (void);
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36 void (*glFlush) (void);
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37 };
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38
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39 #define OPENGL_REQUIRS_DLOPEN
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40 #if defined(OPENGL_REQUIRS_DLOPEN) && defined(SDL_LOADSO_DLOPEN)
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41 #include <dlfcn.h>
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42 #define GL_LoadObject(X) dlopen(X, (RTLD_NOW|RTLD_GLOBAL))
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43 #define GL_LoadFunction dlsym
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44 #define GL_UnloadObject dlclose
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45 #else
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46 #define GL_LoadObject SDL_LoadObject
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47 #define GL_LoadFunction SDL_LoadFunction
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48 #define GL_UnloadObject SDL_UnloadObject
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49 #endif
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50
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51 static void DirectFB_GL_UnloadLibrary(_THIS);
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52
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53 int
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54 DirectFB_GL_Initialize(_THIS)
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55 {
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56 if (_this->gl_data) {
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57 return 0;
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58 }
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59
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60 _this->gl_data =
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61 (struct SDL_GLDriverData *) SDL_calloc(1,
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62 sizeof(struct
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63 SDL_GLDriverData));
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64 if (!_this->gl_data) {
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65 SDL_OutOfMemory();
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66 return -1;
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67 }
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68 _this->gl_data->initialized = 0;
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69
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70 ++_this->gl_data->initialized;
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71 _this->gl_data->firstgl = NULL;
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72
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73 if (DirectFB_GL_LoadLibrary(_this, NULL) < 0) {
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74 return -1;
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75 }
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76
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77 /* Initialize extensions */
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78 /* FIXME needed?
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79 * X11_GL_InitExtensions(_this);
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80 */
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81
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82 return 0;
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83 }
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84
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85 void
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86 DirectFB_GL_Shutdown(_THIS)
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87 {
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88 if (!_this->gl_data || (--_this->gl_data->initialized > 0)) {
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89 return;
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90 }
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91
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92 DirectFB_GL_UnloadLibrary(_this);
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93
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94 SDL_free(_this->gl_data);
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95 _this->gl_data = NULL;
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96 }
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97
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98 int
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99 DirectFB_GL_LoadLibrary(_THIS, const char *path)
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100 {
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101 //SDL_DFB_DEVICEDATA(_this);
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102
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103 void *handle = NULL;
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104
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105 SDL_DFB_DEBUG("Loadlibrary : %s\n", path);
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106
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107 if (_this->gl_data->gl_active) {
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108 SDL_SetError("OpenGL context already created");
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109 return -1;
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110 }
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111
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112
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113 if (path == NULL) {
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114 path = SDL_getenv("SDL_VIDEO_GL_DRIVER");
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115 if (path == NULL) {
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116 path = "libGL.so";
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117 }
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118 }
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119
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120 handle = GL_LoadObject(path);
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121 if (handle == NULL) {
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122 SDL_DFB_ERR("Library not found: %s\n", path);
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123 /* SDL_LoadObject() will call SDL_SetError() for us. */
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124 return -1;
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125 }
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126
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127 SDL_DFB_DEBUG("Loaded library: %s\n", path);
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128
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129 _this->gl_config.dll_handle = handle;
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130 _this->gl_config.driver_loaded = 1;
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131 if (path) {
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132 SDL_strlcpy(_this->gl_config.driver_path, path,
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133 SDL_arraysize(_this->gl_config.driver_path));
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134 } else {
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135 *_this->gl_config.driver_path = '\0';
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136 }
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137
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138 _this->gl_data->glFinish = DirectFB_GL_GetProcAddress(_this, "glFinish");
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139 _this->gl_data->glFlush = DirectFB_GL_GetProcAddress(_this, "glFlush");
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140
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141 return 0;
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142 }
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Sam Lantinga <slouken@libsdl.org>
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143
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Sam Lantinga <slouken@libsdl.org>
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144 static void
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Sam Lantinga <slouken@libsdl.org>
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145 DirectFB_GL_UnloadLibrary(_THIS)
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Sam Lantinga <slouken@libsdl.org>
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146 {
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147 #if 0
2737
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148 int ret;
140a7edcf2bd Date: Sun, 31 Aug 2008 17:53:59 +0200
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149
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Sam Lantinga <slouken@libsdl.org>
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150 if (_this->gl_config.driver_loaded) {
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151
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152 ret = GL_UnloadObject(_this->gl_config.dll_handle);
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153 if (ret)
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154 SDL_DFB_ERR("Error #%d trying to unload library.\n", ret);
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155 _this->gl_config.dll_handle = NULL;
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156 _this->gl_config.driver_loaded = 0;
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157 }
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158 #endif
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159 /* Free OpenGL memory */
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160 SDL_free(_this->gl_data);
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161 _this->gl_data = NULL;
2737
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162 }
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163
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Sam Lantinga <slouken@libsdl.org>
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164 void *
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165 DirectFB_GL_GetProcAddress(_THIS, const char *proc)
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166 {
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167 void *handle;
140a7edcf2bd Date: Sun, 31 Aug 2008 17:53:59 +0200
Sam Lantinga <slouken@libsdl.org>
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168
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169 handle = _this->gl_config.dll_handle;
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170 return GL_LoadFunction(handle, proc);
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171 }
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172
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173 SDL_GLContext
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174 DirectFB_GL_CreateContext(_THIS, SDL_Window * window)
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175 {
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176 //SDL_DFB_DEVICEDATA(_this);
2737
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177 SDL_DFB_WINDOWDATA(window);
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178 DirectFB_GLContext *context;
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179
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180 SDL_DFB_CALLOC(context, 1, sizeof(DirectFB_GLContext));
2737
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181
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182 SDL_DFB_CHECKERR(windata->surface->GetGL(windata->surface,
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183 &context->context));
2998
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184
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185 if (!context->context)
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186 return NULL;
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187
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188 context->is_locked = 0;
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189 context->sdl_window = window;
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190
2737
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191 context->next = _this->gl_data->firstgl;
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192 _this->gl_data->firstgl = context;
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193
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194 SDL_DFB_CHECK(context->context->Unlock(context->context));
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195
2737
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196 if (DirectFB_GL_MakeCurrent(_this, window, context) < 0) {
140a7edcf2bd Date: Sun, 31 Aug 2008 17:53:59 +0200
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197 DirectFB_GL_DeleteContext(_this, context);
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198 return NULL;
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199 }
140a7edcf2bd Date: Sun, 31 Aug 2008 17:53:59 +0200
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diff changeset
200
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201 return context;
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
202
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
203 error:
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204 return NULL;
140a7edcf2bd Date: Sun, 31 Aug 2008 17:53:59 +0200
Sam Lantinga <slouken@libsdl.org>
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diff changeset
205 }
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
206
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Sam Lantinga <slouken@libsdl.org>
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207 int
140a7edcf2bd Date: Sun, 31 Aug 2008 17:53:59 +0200
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208 DirectFB_GL_MakeCurrent(_THIS, SDL_Window * window, SDL_GLContext context)
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209 {
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210 //SDL_DFB_WINDOWDATA(window);
2737
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211 DirectFB_GLContext *ctx = (DirectFB_GLContext *) context;
140a7edcf2bd Date: Sun, 31 Aug 2008 17:53:59 +0200
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diff changeset
212 DirectFB_GLContext *p;
140a7edcf2bd Date: Sun, 31 Aug 2008 17:53:59 +0200
Sam Lantinga <slouken@libsdl.org>
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diff changeset
213
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214 for (p = _this->gl_data->firstgl; p; p = p->next)
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215 {
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diff changeset
216 if (p->is_locked) {
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217 SDL_DFB_CHECKERR(p->context->Unlock(p->context));
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218 p->is_locked = 0;
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diff changeset
219 }
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diff changeset
220
2737
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diff changeset
221 }
140a7edcf2bd Date: Sun, 31 Aug 2008 17:53:59 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
222
140a7edcf2bd Date: Sun, 31 Aug 2008 17:53:59 +0200
Sam Lantinga <slouken@libsdl.org>
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diff changeset
223 if (ctx != NULL) {
140a7edcf2bd Date: Sun, 31 Aug 2008 17:53:59 +0200
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diff changeset
224 SDL_DFB_CHECKERR(ctx->context->Lock(ctx->context));
4636
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225 ctx->is_locked = 1;
2737
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diff changeset
226 }
140a7edcf2bd Date: Sun, 31 Aug 2008 17:53:59 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
227
140a7edcf2bd Date: Sun, 31 Aug 2008 17:53:59 +0200
Sam Lantinga <slouken@libsdl.org>
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diff changeset
228 return 0;
140a7edcf2bd Date: Sun, 31 Aug 2008 17:53:59 +0200
Sam Lantinga <slouken@libsdl.org>
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diff changeset
229 error:
140a7edcf2bd Date: Sun, 31 Aug 2008 17:53:59 +0200
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diff changeset
230 return -1;
140a7edcf2bd Date: Sun, 31 Aug 2008 17:53:59 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
231 }
140a7edcf2bd Date: Sun, 31 Aug 2008 17:53:59 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
232
140a7edcf2bd Date: Sun, 31 Aug 2008 17:53:59 +0200
Sam Lantinga <slouken@libsdl.org>
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diff changeset
233 int
140a7edcf2bd Date: Sun, 31 Aug 2008 17:53:59 +0200
Sam Lantinga <slouken@libsdl.org>
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diff changeset
234 DirectFB_GL_SetSwapInterval(_THIS, int interval)
140a7edcf2bd Date: Sun, 31 Aug 2008 17:53:59 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
235 {
140a7edcf2bd Date: Sun, 31 Aug 2008 17:53:59 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
236 SDL_Unsupported();
140a7edcf2bd Date: Sun, 31 Aug 2008 17:53:59 +0200
Sam Lantinga <slouken@libsdl.org>
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diff changeset
237 return -1;
140a7edcf2bd Date: Sun, 31 Aug 2008 17:53:59 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
238 }
140a7edcf2bd Date: Sun, 31 Aug 2008 17:53:59 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
239
140a7edcf2bd Date: Sun, 31 Aug 2008 17:53:59 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
240 int
140a7edcf2bd Date: Sun, 31 Aug 2008 17:53:59 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
241 DirectFB_GL_GetSwapInterval(_THIS)
140a7edcf2bd Date: Sun, 31 Aug 2008 17:53:59 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
242 {
140a7edcf2bd Date: Sun, 31 Aug 2008 17:53:59 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
243 SDL_Unsupported();
140a7edcf2bd Date: Sun, 31 Aug 2008 17:53:59 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
244 return -1;
140a7edcf2bd Date: Sun, 31 Aug 2008 17:53:59 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
245 }
140a7edcf2bd Date: Sun, 31 Aug 2008 17:53:59 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
246
140a7edcf2bd Date: Sun, 31 Aug 2008 17:53:59 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
247 void
140a7edcf2bd Date: Sun, 31 Aug 2008 17:53:59 +0200
Sam Lantinga <slouken@libsdl.org>
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diff changeset
248 DirectFB_GL_SwapWindow(_THIS, SDL_Window * window)
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diff changeset
249 {
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diff changeset
250 //SDL_DFB_DEVICEDATA(_this);
2737
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diff changeset
251 SDL_DFB_WINDOWDATA(window);
140a7edcf2bd Date: Sun, 31 Aug 2008 17:53:59 +0200
Sam Lantinga <slouken@libsdl.org>
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diff changeset
252 DFBRegion region;
4636
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diff changeset
253 DirectFB_GLContext *p;
2737
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
254
140a7edcf2bd Date: Sun, 31 Aug 2008 17:53:59 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
255 region.x1 = 0;
140a7edcf2bd Date: Sun, 31 Aug 2008 17:53:59 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
256 region.y1 = 0;
140a7edcf2bd Date: Sun, 31 Aug 2008 17:53:59 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
257 region.x2 = window->w;
140a7edcf2bd Date: Sun, 31 Aug 2008 17:53:59 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
258 region.y2 = window->h;
140a7edcf2bd Date: Sun, 31 Aug 2008 17:53:59 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
259
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diff changeset
260 #if 0
2737
140a7edcf2bd Date: Sun, 31 Aug 2008 17:53:59 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
261 if (devdata->glFinish)
140a7edcf2bd Date: Sun, 31 Aug 2008 17:53:59 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
262 devdata->glFinish();
140a7edcf2bd Date: Sun, 31 Aug 2008 17:53:59 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
263 else if (devdata->glFlush)
140a7edcf2bd Date: Sun, 31 Aug 2008 17:53:59 +0200
Sam Lantinga <slouken@libsdl.org>
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diff changeset
264 devdata->glFlush();
4636
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diff changeset
265 #endif
2737
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diff changeset
266
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diff changeset
267 for (p = _this->gl_data->firstgl; p != NULL; p = p->next)
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diff changeset
268 if (p->sdl_window == window && p->is_locked)
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diff changeset
269 {
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diff changeset
270 SDL_DFB_CHECKERR(p->context->Unlock(p->context));
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diff changeset
271 p->is_locked = 0;
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diff changeset
272 }
2737
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diff changeset
273
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274 SDL_DFB_CHECKERR(windata->window_surface->Flip(windata->window_surface,NULL, DSFLIP_PIPELINE |DSFLIP_BLIT | DSFLIP_ONSYNC ));
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diff changeset
275
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diff changeset
276 //if (windata->gl_context) {
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diff changeset
277 //SDL_DFB_CHECKERR(windata->surface->Flip(windata->surface,NULL, DSFLIP_ONSYNC));
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diff changeset
278 //SDL_DFB_CHECKERR(windata->gl_context->context->Lock(windata->gl_context->context));
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diff changeset
279 //}
2737
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parents:
diff changeset
280
140a7edcf2bd Date: Sun, 31 Aug 2008 17:53:59 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
281 return;
140a7edcf2bd Date: Sun, 31 Aug 2008 17:53:59 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
282 error:
140a7edcf2bd Date: Sun, 31 Aug 2008 17:53:59 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
283 return;
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284 }
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285
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286 void
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287 DirectFB_GL_DeleteContext(_THIS, SDL_GLContext context)
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288 {
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289 DirectFB_GLContext *ctx = (DirectFB_GLContext *) context;
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290 DirectFB_GLContext *p;
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291
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292 if (ctx->is_locked)
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293 SDL_DFB_CHECK(ctx->context->Unlock(ctx->context));
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294 SDL_DFB_RELEASE(ctx->context);
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295
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296 for (p = _this->gl_data->firstgl; p && p->next != ctx; p = p->next)
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297 ;
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298 if (p)
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299 p->next = ctx->next;
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300 else
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301 _this->gl_data->firstgl = ctx->next;
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302
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303 SDL_DFB_FREE(ctx);
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304 }
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305
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306 void
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307 DirectFB_GL_FreeWindowContexts(_THIS, SDL_Window * window)
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308 {
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309 DirectFB_GLContext *p;
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310
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311 for (p = _this->gl_data->firstgl; p != NULL; p = p->next)
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312 if (p->sdl_window == window)
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313 {
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314 if (p->is_locked)
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315 SDL_DFB_CHECK(p->context->Unlock(p->context));
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316 SDL_DFB_RELEASE(p->context);
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317 }
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318 }
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319
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320 void
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321 DirectFB_GL_ReAllocWindowContexts(_THIS, SDL_Window * window)
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322 {
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323 DirectFB_GLContext *p;
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324
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325 for (p = _this->gl_data->firstgl; p != NULL; p = p->next)
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326 if (p->sdl_window == window)
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327 {
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328 SDL_DFB_WINDOWDATA(window);
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329 SDL_DFB_CHECK(windata->surface->GetGL(windata->surface,
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330 &p->context));
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331 if (p->is_locked)
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332 SDL_DFB_CHECK(p->context->Lock(p->context));
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333 }
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334 }
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335
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336 void
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337 DirectFB_GL_DestroyWindowContexts(_THIS, SDL_Window * window)
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338 {
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339 DirectFB_GLContext *p;
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340
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341 for (p = _this->gl_data->firstgl; p != NULL; p = p->next)
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342 if (p->sdl_window == window)
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343 DirectFB_GL_DeleteContext(_this, p);
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344 }
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345
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346 #endif
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347
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348 /* vi: set ts=4 sw=4 expandtab: */