annotate src/video/maccommon/SDL_macgl.c @ 1319:66f6c64c2c69

Logic bug in X11 Unicode input shutdown...was checking for == NULL when it should be != NULL.
author Ryan C. Gordon <icculus@icculus.org>
date Wed, 01 Feb 2006 19:59:02 +0000
parents c9b51268668f
children c71e05b4dc2e
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
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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
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23 /* AGL implementation of SDL OpenGL support */
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24
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25 #include "SDL_error.h"
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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 Mac_GL_Init(_THIS)
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33 {
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34 #ifdef HAVE_OPENGL
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35 AGLPixelFormat format;
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36 int i = 0;
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37 GLint attributes [ 24 ]; /* 24 is max possible in this setup */
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38 GLboolean noerr;
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39
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40 attributes[i++] = AGL_RGBA;
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41 if ( this->gl_config.red_size != 0 &&
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42 this->gl_config.blue_size != 0 &&
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43 this->gl_config.green_size != 0 ) {
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44 attributes[i++] = AGL_RED_SIZE;
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45 attributes[i++] = this->gl_config.red_size;
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46 attributes[i++] = AGL_GREEN_SIZE;
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47 attributes[i++] = this->gl_config.green_size;
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48 attributes[i++] = AGL_BLUE_SIZE;
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49 attributes[i++] = this->gl_config.blue_size;
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50 attributes[i++] = AGL_ALPHA_SIZE;
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51 attributes[i++] = this->gl_config.alpha_size;
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52 }
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53 if ( this->gl_config.double_buffer ) {
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54 attributes[i++] = AGL_DOUBLEBUFFER;
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55 }
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56 if ( this->gl_config.depth_size != 0 ) {
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57 attributes[i++] = AGL_DEPTH_SIZE;
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58 attributes[i++] = this->gl_config.depth_size;
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59 }
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60 if ( this->gl_config.stencil_size != 0 ) {
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61 attributes[i++] = AGL_STENCIL_SIZE;
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62 attributes[i++] = this->gl_config.stencil_size;
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63 }
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64 if ( this->gl_config.accum_red_size != 0 &&
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65 this->gl_config.accum_blue_size != 0 &&
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66 this->gl_config.accum_green_size != 0 ) {
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67
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68 attributes[i++] = AGL_ACCUM_RED_SIZE;
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69 attributes[i++] = this->gl_config.accum_red_size;
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70 attributes[i++] = AGL_ACCUM_GREEN_SIZE;
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71 attributes[i++] = this->gl_config.accum_green_size;
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72 attributes[i++] = AGL_ACCUM_BLUE_SIZE;
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73 attributes[i++] = this->gl_config.accum_blue_size;
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74 attributes[i++] = AGL_ACCUM_ALPHA_SIZE;
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75 attributes[i++] = this->gl_config.accum_alpha_size;
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76 }
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77 if ( this->gl_config.stereo ) {
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78 attributes[i++] = AGL_STEREO;
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79 }
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80 #if defined(AGL_SAMPLE_BUFFERS_ARB) && defined(AGL_SAMPLES_ARB)
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81 if ( this->gl_config.multisamplebuffers != 0 ) {
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82 attributes[i++] = AGL_SAMPLE_BUFFERS_ARB;
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83 attributes[i++] = this->gl_config.multisamplebuffers;
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84 }
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85 if ( this->gl_config.multisamplesamples != 0 ) {
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86 attributes[i++] = AGL_SAMPLES_ARB;
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87 attributes[i++] = this->gl_config.multisamplesamples;
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88 }
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89 #endif
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90 attributes[i++] = AGL_ALL_RENDERERS;
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91 attributes[i] = AGL_NONE;
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92
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93 format = aglChoosePixelFormat(NULL, 0, attributes);
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94 if ( format == NULL ) {
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95 SDL_SetError("Couldn't match OpenGL desired format");
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96 return(-1);
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97 }
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98
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99 glContext = aglCreateContext(format, NULL);
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100 if ( glContext == NULL ) {
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101 SDL_SetError("Couldn't create OpenGL context");
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102 return(-1);
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103 }
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104 aglDestroyPixelFormat(format);
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105
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106 #if TARGET_API_MAC_CARBON
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107 noerr = aglSetDrawable(glContext, GetWindowPort(SDL_Window));
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108 #else
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109 noerr = aglSetDrawable(glContext, (AGLDrawable)SDL_Window);
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110 #endif
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111
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112 if(!noerr) {
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113 SDL_SetError("Unable to bind GL context to window");
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114 return(-1);
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115 }
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116 return(0);
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117 #else
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118 SDL_SetError("OpenGL support not configured");
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119 return(-1);
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120 #endif
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121 }
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122
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123 void Mac_GL_Quit(_THIS)
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124 {
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125 #ifdef HAVE_OPENGL
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126 if ( glContext != NULL ) {
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127 aglSetCurrentContext(NULL);
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128 aglSetDrawable(glContext, NULL);
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129 aglDestroyContext(glContext);
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130 glContext = NULL;
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131 }
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132 #endif
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133 }
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134
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135 #ifdef HAVE_OPENGL
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136
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137 /* Make the current context active */
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138 int Mac_GL_MakeCurrent(_THIS)
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139 {
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140 int retval;
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141
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142 retval = 0;
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143 if( ! aglSetCurrentContext(glContext) ) {
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144 SDL_SetError("Unable to make GL context current");
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145 retval = -1;
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146 }
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147 return(retval);
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148 }
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149
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150 void Mac_GL_SwapBuffers(_THIS)
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151 {
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152 aglSwapBuffers(glContext);
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153 }
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154
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155 int Mac_GL_LoadLibrary(_THIS, const char *location)
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156 {
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157 if (location == NULL)
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158 location = "OpenGLLibrary";
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159
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160 this->hidden->libraryHandle = SDL_LoadObject(location);
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161
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162 this->gl_config.driver_loaded = 1;
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163 return (this->hidden->libraryHandle != NULL) ? 0 : -1;
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164 }
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165
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166 void Mac_GL_UnloadLibrary(_THIS)
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167 {
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168 SDL_UnloadObject(this->hidden->libraryHandle);
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169
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170 this->hidden->libraryHandle = NULL;
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171 this->gl_config.driver_loaded = 0;
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172 }
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173
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174 void* Mac_GL_GetProcAddress(_THIS, const char *proc)
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175 {
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176 return SDL_LoadFunction( this->hidden->libraryHandle, proc );
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177 }
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178
0
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179 #endif /* HAVE_OPENGL */
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180