Mercurial > sdl-ios-xcode
annotate src/video/x11/SDL_x11opengles.c @ 5166:d72793305335
Making the API simpler, moved the surface drawing functions to the software renderer.
author | Sam Lantinga <slouken@libsdl.org> |
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date | Thu, 03 Feb 2011 02:45:29 -0800 |
parents | f7b03b6838cb |
children | b530ef003506 |
rev | line source |
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1 /* |
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2 SDL - Simple DirectMedia Layer |
3697 | 3 Copyright (C) 1997-2010 Sam Lantinga |
3190
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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 |
3361 | 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 Open Pandora SDL driver |
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23 Copyright (C) 2009 David Carré |
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24 (cpasjuste@gmail.com) |
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25 */ |
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26 #include "SDL_config.h" |
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27 |
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28 #if SDL_VIDEO_OPENGL_ES |
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29 |
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30 #include "SDL_x11video.h" |
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31 #include "SDL_x11opengles.h" |
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32 |
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33 #define DEFAULT_OPENGL "/usr/lib/libGLES_CM.so" |
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34 |
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35 #define LOAD_FUNC(NAME) \ |
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36 *((void**)&_this->gles_data->NAME) = dlsym(handle, #NAME); \ |
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37 if (!_this->gles_data->NAME) \ |
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38 { \ |
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39 SDL_SetError("Could not retrieve EGL function " #NAME); \ |
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40 return -1; \ |
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41 } |
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42 |
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43 /* GLES implementation of SDL OpenGL support */ |
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44 |
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45 void * |
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46 X11_GLES_GetProcAddress(_THIS, const char *proc) |
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47 { |
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48 static char procname[1024]; |
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49 void *handle; |
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50 void *retval; |
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51 |
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52 handle = _this->gl_config.dll_handle; |
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53 if (_this->gles_data->eglGetProcAddress) { |
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54 retval = _this->gles_data->eglGetProcAddress(proc); |
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55 if (retval) { |
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56 return retval; |
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57 } |
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58 } |
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59 #if defined(__OpenBSD__) && !defined(__ELF__) |
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60 #undef dlsym(x,y); |
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61 #endif |
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62 retval = dlsym(handle, proc); |
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63 if (!retval && strlen(proc) <= 1022) { |
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64 procname[0] = '_'; |
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65 strcpy(procname + 1, proc); |
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66 retval = dlsym(handle, procname); |
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67 } |
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68 return retval; |
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69 } |
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70 |
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71 void |
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72 X11_GLES_UnloadLibrary(_THIS) |
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73 { |
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74 if (_this->gl_config.driver_loaded) { |
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75 _this->gles_data->eglTerminate(_this->gles_data->egl_display); |
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76 |
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77 dlclose(_this->gl_config.dll_handle); |
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78 |
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79 _this->gles_data->eglGetProcAddress = NULL; |
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80 _this->gles_data->eglChooseConfig = NULL; |
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81 _this->gles_data->eglCreateContext = NULL; |
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82 _this->gles_data->eglCreateWindowSurface = NULL; |
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83 _this->gles_data->eglDestroyContext = NULL; |
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84 _this->gles_data->eglDestroySurface = NULL; |
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85 _this->gles_data->eglMakeCurrent = NULL; |
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86 _this->gles_data->eglSwapBuffers = NULL; |
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87 _this->gles_data->eglGetDisplay = NULL; |
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88 _this->gles_data->eglTerminate = NULL; |
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89 |
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90 _this->gl_config.dll_handle = NULL; |
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91 _this->gl_config.driver_loaded = 0; |
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92 } |
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93 } |
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94 |
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95 int |
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96 X11_GLES_LoadLibrary(_THIS, const char *path) |
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97 { |
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98 void *handle; |
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99 int dlopen_flags; |
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100 |
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101 SDL_VideoData *data = (SDL_VideoData *) _this->driverdata; |
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102 |
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103 if (_this->gles_data->egl_active) { |
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104 SDL_SetError("OpenGL ES context already created"); |
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105 return -1; |
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106 } |
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107 #ifdef RTLD_GLOBAL |
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108 dlopen_flags = RTLD_LAZY | RTLD_GLOBAL; |
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109 #else |
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110 dlopen_flags = RTLD_LAZY; |
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111 #endif |
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112 handle = dlopen(path, dlopen_flags); |
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113 /* Catch the case where the application isn't linked with EGL */ |
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114 if ((dlsym(handle, "eglChooseConfig") == NULL) && (path == NULL)) { |
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115 |
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116 dlclose(handle); |
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117 path = getenv("SDL_VIDEO_GL_DRIVER"); |
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118 if (path == NULL) { |
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119 path = DEFAULT_OPENGL; |
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120 } |
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121 handle = dlopen(path, dlopen_flags); |
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122 } |
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123 |
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124 if (handle == NULL) { |
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125 SDL_SetError("Could not load OpenGL ES/EGL library"); |
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126 return -1; |
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127 } |
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128 |
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129 /* Unload the old driver and reset the pointers */ |
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130 X11_GLES_UnloadLibrary(_this); |
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131 |
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132 /* Load new function pointers */ |
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133 LOAD_FUNC(eglGetDisplay); |
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changeset
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134 LOAD_FUNC(eglInitialize); |
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changeset
|
135 LOAD_FUNC(eglTerminate); |
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parents:
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changeset
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136 LOAD_FUNC(eglGetProcAddress); |
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|
137 LOAD_FUNC(eglChooseConfig); |
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parents:
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changeset
|
138 LOAD_FUNC(eglGetConfigAttrib); |
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parents:
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changeset
|
139 LOAD_FUNC(eglCreateContext); |
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parents:
diff
changeset
|
140 LOAD_FUNC(eglDestroyContext); |
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parents:
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changeset
|
141 LOAD_FUNC(eglCreateWindowSurface); |
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changeset
|
142 LOAD_FUNC(eglDestroySurface); |
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parents:
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changeset
|
143 LOAD_FUNC(eglMakeCurrent); |
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changeset
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144 LOAD_FUNC(eglSwapBuffers); |
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145 |
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changeset
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146 _this->gles_data->egl_display = |
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147 _this->gles_data->eglGetDisplay((NativeDisplayType) data->display); |
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148 |
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149 if (!_this->gles_data->egl_display) { |
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150 SDL_SetError("Could not get EGL display"); |
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151 return -1; |
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152 } |
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153 |
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154 if (_this->gles_data-> |
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155 eglInitialize(_this->gles_data->egl_display, NULL, |
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156 NULL) != EGL_TRUE) { |
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157 SDL_SetError("Could not initialize EGL"); |
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158 return -1; |
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159 } |
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160 |
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161 _this->gl_config.dll_handle = handle; |
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162 _this->gl_config.driver_loaded = 1; |
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163 |
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164 if (path) { |
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165 strncpy(_this->gl_config.driver_path, path, |
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166 sizeof(_this->gl_config.driver_path) - 1); |
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167 } else { |
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168 strcpy(_this->gl_config.driver_path, ""); |
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169 } |
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170 return 0; |
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171 } |
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172 |
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173 XVisualInfo * |
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174 X11_GLES_GetVisual(_THIS, Display * display, int screen) |
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175 { |
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176 /* 64 seems nice. */ |
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177 EGLint attribs[64]; |
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178 EGLint found_configs = 0; |
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179 VisualID visual_id; |
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180 int i; |
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181 |
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changeset
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182 /* load the gl driver from a default path */ |
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183 if (!_this->gl_config.driver_loaded) { |
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184 /* no driver has been loaded, use default (ourselves) */ |
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185 if (X11_GLES_LoadLibrary(_this, NULL) < 0) { |
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186 return NULL; |
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187 } |
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|
188 } |
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189 |
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190 i = 0; |
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191 attribs[i++] = EGL_RED_SIZE; |
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192 attribs[i++] = _this->gl_config.red_size; |
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193 attribs[i++] = EGL_GREEN_SIZE; |
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194 attribs[i++] = _this->gl_config.green_size; |
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195 attribs[i++] = EGL_BLUE_SIZE; |
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196 attribs[i++] = _this->gl_config.blue_size; |
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|
197 |
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|
198 if (_this->gl_config.alpha_size) { |
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199 attribs[i++] = EGL_ALPHA_SIZE; |
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200 attribs[i++] = _this->gl_config.alpha_size; |
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|
201 } |
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|
202 |
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parents:
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changeset
|
203 if (_this->gl_config.buffer_size) { |
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204 attribs[i++] = EGL_BUFFER_SIZE; |
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205 attribs[i++] = _this->gl_config.buffer_size; |
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|
206 } |
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parents:
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changeset
|
207 |
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changeset
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208 attribs[i++] = EGL_DEPTH_SIZE; |
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|
209 attribs[i++] = _this->gl_config.depth_size; |
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210 |
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parents:
diff
changeset
|
211 if (_this->gl_config.stencil_size) { |
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212 attribs[i++] = EGL_STENCIL_SIZE; |
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changeset
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213 attribs[i++] = _this->gl_config.stencil_size; |
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|
214 } |
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parents:
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changeset
|
215 |
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diff
changeset
|
216 if (_this->gl_config.multisamplebuffers) { |
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changeset
|
217 attribs[i++] = EGL_SAMPLE_BUFFERS; |
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|
218 attribs[i++] = _this->gl_config.multisamplebuffers; |
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changeset
|
219 } |
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changeset
|
220 |
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parents:
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changeset
|
221 if (_this->gl_config.multisamplesamples) { |
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222 attribs[i++] = EGL_SAMPLES; |
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223 attribs[i++] = _this->gl_config.multisamplesamples; |
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diff
changeset
|
224 } |
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parents:
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changeset
|
225 |
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226 attribs[i++] = EGL_NONE; |
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changeset
|
227 |
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diff
changeset
|
228 if (_this->gles_data->eglChooseConfig(_this->gles_data->egl_display, |
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|
229 attribs, |
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changeset
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230 &_this->gles_data->egl_config, 1, |
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231 &found_configs) == EGL_FALSE || |
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parents:
diff
changeset
|
232 found_configs == 0) { |
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parents:
diff
changeset
|
233 SDL_SetError("Couldn't find matching EGL config"); |
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|
234 return NULL; |
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parents:
diff
changeset
|
235 } |
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parents:
diff
changeset
|
236 |
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parents:
diff
changeset
|
237 if (_this->gles_data->eglGetConfigAttrib(_this->gles_data->egl_display, |
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changeset
|
238 _this->gles_data->egl_config, |
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|
239 EGL_NATIVE_VISUAL_ID, |
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|
240 (EGLint *) & visual_id) == |
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parents:
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changeset
|
241 EGL_FALSE || !visual_id) { |
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diff
changeset
|
242 /* Use the default visual when all else fails */ |
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parents:
diff
changeset
|
243 XVisualInfo vi_in; |
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parents:
diff
changeset
|
244 int out_count; |
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parents:
diff
changeset
|
245 vi_in.screen = screen; |
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parents:
diff
changeset
|
246 |
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parents:
diff
changeset
|
247 _this->gles_data->egl_visualinfo = XGetVisualInfo(display, |
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diff
changeset
|
248 VisualScreenMask, |
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parents:
diff
changeset
|
249 &vi_in, &out_count); |
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parents:
diff
changeset
|
250 } else { |
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parents:
diff
changeset
|
251 XVisualInfo vi_in; |
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parents:
diff
changeset
|
252 int out_count; |
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parents:
diff
changeset
|
253 |
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parents:
diff
changeset
|
254 vi_in.screen = screen; |
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parents:
diff
changeset
|
255 vi_in.visualid = visual_id; |
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parents:
diff
changeset
|
256 _this->gles_data->egl_visualinfo = XGetVisualInfo(display, |
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parents:
diff
changeset
|
257 VisualScreenMask | |
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parents:
diff
changeset
|
258 VisualIDMask, |
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parents:
diff
changeset
|
259 &vi_in, &out_count); |
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parents:
diff
changeset
|
260 } |
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parents:
diff
changeset
|
261 |
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262 return _this->gles_data->egl_visualinfo; |
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263 } |
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264 |
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265 SDL_GLContext |
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266 X11_GLES_CreateContext(_THIS, SDL_Window * window) |
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267 { |
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268 int retval; |
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269 SDL_WindowData *data = (SDL_WindowData *) window->driverdata; |
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270 Display *display = data->videodata->display; |
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271 |
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272 XSync(display, False); |
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273 |
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274 |
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275 _this->gles_data->egl_context = |
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276 _this->gles_data->eglCreateContext(_this->gles_data->egl_display, |
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277 _this->gles_data->egl_config, |
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278 EGL_NO_CONTEXT, NULL); |
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279 XSync(display, False); |
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280 |
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281 if (_this->gles_data->egl_context == EGL_NO_CONTEXT) { |
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282 SDL_SetError("Could not create EGL context"); |
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283 return NULL; |
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284 } |
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285 |
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286 _this->gles_data->egl_active = 1; |
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287 |
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288 if (_this->gles_data->egl_active) |
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289 retval = 1; |
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290 else |
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291 retval = 0; |
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292 |
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293 return (retval); |
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294 } |
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295 |
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296 int |
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297 X11_GLES_MakeCurrent(_THIS, SDL_Window * window, SDL_GLContext context) |
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298 { |
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299 int retval; |
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300 |
3218 | 301 // SDL_WindowData *data = (SDL_WindowData *) window->driverdata; |
302 // Display *display = data->videodata->display; | |
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303 |
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304 retval = 1; |
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305 if (!_this->gles_data->eglMakeCurrent(_this->gles_data->egl_display, |
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306 _this->gles_data->egl_surface, |
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307 _this->gles_data->egl_surface, |
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308 _this->gles_data->egl_context)) { |
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309 SDL_SetError("Unable to make EGL context current"); |
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310 retval = -1; |
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311 } |
3218 | 312 // XSync(display, False); |
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313 |
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314 return (retval); |
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315 } |
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316 |
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317 static int swapinterval = -1; |
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318 int |
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319 X11_GLES_SetSwapInterval(_THIS, int interval) |
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320 { |
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321 return 0; |
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322 } |
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323 |
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324 int |
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325 X11_GLES_GetSwapInterval(_THIS) |
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326 { |
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327 return 0; |
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328 } |
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329 |
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330 void |
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331 X11_GLES_SwapWindow(_THIS, SDL_Window * window) |
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332 { |
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333 _this->gles_data->eglSwapBuffers(_this->gles_data->egl_display, |
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334 _this->gles_data->egl_surface); |
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335 } |
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336 |
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337 void |
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338 X11_GLES_DeleteContext(_THIS, SDL_GLContext context) |
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339 { |
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340 /* Clean up GLES and EGL */ |
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341 if (_this->gles_data->egl_context != EGL_NO_CONTEXT || |
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342 _this->gles_data->egl_surface != EGL_NO_SURFACE) { |
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343 _this->gles_data->eglMakeCurrent(_this->gles_data->egl_display, |
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344 EGL_NO_SURFACE, EGL_NO_SURFACE, |
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345 EGL_NO_CONTEXT); |
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346 |
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347 if (_this->gles_data->egl_context != EGL_NO_CONTEXT) { |
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348 _this->gles_data->eglDestroyContext(_this->gles_data->egl_display, |
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349 _this->gles_data-> |
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350 egl_context); |
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351 _this->gles_data->egl_context = EGL_NO_CONTEXT; |
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352 } |
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353 |
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354 if (_this->gles_data->egl_surface != EGL_NO_SURFACE) { |
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355 _this->gles_data->eglDestroySurface(_this->gles_data->egl_display, |
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356 _this->gles_data-> |
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357 egl_surface); |
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358 _this->gles_data->egl_surface = EGL_NO_SURFACE; |
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359 } |
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360 } |
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361 _this->gles_data->egl_active = 0; |
3218 | 362 |
363 /* crappy fix */ | |
364 X11_GLES_UnloadLibrary(_this); | |
365 | |
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366 } |
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367 |
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368 #endif /* SDL_VIDEO_OPENGL_ES */ |
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369 |
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370 /* vi: set ts=4 sw=4 expandtab: */ |