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annotate src/video/quartz/SDL_QuartzGL.m @ 828:85ba077211bc

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author Sam Lantinga <slouken@libsdl.org>
date Sun, 15 Feb 2004 22:04:46 +0000
parents ac44ddb84f6f
children ce05e92d909b
rev   line source
761
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2003 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 Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 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 Library 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 Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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 #include "SDL_QuartzVideo.h"
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24
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25
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26 @implementation NSOpenGLContext (CGLContextAccess)
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27 - (CGLContextObj) cglContext;
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28 {
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29 return _contextAuxiliary;
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30 }
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31 @end
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32
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33 /* OpenGL helper functions (used internally) */
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34
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35 int QZ_SetupOpenGL (_THIS, int bpp, Uint32 flags) {
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36
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37 NSOpenGLPixelFormatAttribute attr[32];
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38 NSOpenGLPixelFormat *fmt;
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39 int i = 0;
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40 int colorBits = bpp;
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41
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42 if ( flags & SDL_FULLSCREEN ) {
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43
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44 attr[i++] = NSOpenGLPFAFullScreen;
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45 }
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46 /* In windowed mode, the OpenGL pixel depth must match device pixel depth */
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47 else if ( colorBits != device_bpp ) {
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48
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49 colorBits = device_bpp;
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50 }
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51
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52 attr[i++] = NSOpenGLPFAColorSize;
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53 attr[i++] = colorBits;
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54
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55 attr[i++] = NSOpenGLPFADepthSize;
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56 attr[i++] = this->gl_config.depth_size;
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57
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58 if ( this->gl_config.double_buffer ) {
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59 attr[i++] = NSOpenGLPFADoubleBuffer;
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60 }
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61
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62 if ( this->gl_config.stereo ) {
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63 attr[i++] = NSOpenGLPFAStereo;
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64 }
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65
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66 if ( this->gl_config.stencil_size != 0 ) {
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67 attr[i++] = NSOpenGLPFAStencilSize;
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68 attr[i++] = this->gl_config.stencil_size;
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69 }
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70
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71 #if NSOPENGL_CURRENT_VERSION > 1 /* What version should this be? */
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72 if ( this->gl_config.multisamplebuffers != 0 ) {
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73 attr[i++] = NSOpenGLPFASampleBuffers;
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74 attr[i++] = this->gl_config.multisamplebuffers;
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75 }
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76
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77 if ( this->gl_config.multisamplesamples != 0 ) {
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78 attr[i++] = NSOpenGLPFASamples;
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79 attr[i++] = this->gl_config.multisamplesamples;
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80 }
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81 #endif
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82
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83 attr[i++] = NSOpenGLPFAScreenMask;
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84 attr[i++] = CGDisplayIDToOpenGLDisplayMask (display_id);
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85 attr[i] = 0;
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86
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87 fmt = [ [ NSOpenGLPixelFormat alloc ] initWithAttributes:attr ];
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88 if (fmt == nil) {
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89 SDL_SetError ("Failed creating OpenGL pixel format");
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90 return 0;
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91 }
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92
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93 gl_context = [ [ NSOpenGLContext alloc ] initWithFormat:fmt
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94 shareContext:nil];
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95
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96 if (gl_context == nil) {
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97 SDL_SetError ("Failed creating OpenGL context");
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98 return 0;
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99 }
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100
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101 /*
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102 * Wisdom from Apple engineer in reference to UT2003's OpenGL performance:
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103 * "You are blowing a couple of the internal OpenGL function caches. This
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104 * appears to be happening in the VAO case. You can tell OpenGL to up
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105 * the cache size by issuing the following calls right after you create
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106 * the OpenGL context. The default cache size is 16." --ryan.
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107 */
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108
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109 #ifndef GLI_ARRAY_FUNC_CACHE_MAX
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110 #define GLI_ARRAY_FUNC_CACHE_MAX 284
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111 #endif
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112
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113 #ifndef GLI_SUBMIT_FUNC_CACHE_MAX
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114 #define GLI_SUBMIT_FUNC_CACHE_MAX 280
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115 #endif
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116
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117 {
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118 long cache_max = 64;
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119 CGLContextObj ctx = [ gl_context cglContext ];
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120 CGLSetParameter (ctx, GLI_SUBMIT_FUNC_CACHE_MAX, &cache_max);
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121 CGLSetParameter (ctx, GLI_ARRAY_FUNC_CACHE_MAX, &cache_max);
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122 }
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123
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124 /* End Wisdom from Apple Engineer section. --ryan. */
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125
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126 /* Convince SDL that the GL "driver" is loaded */
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127 this->gl_config.driver_loaded = 1;
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128
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129 [ fmt release ];
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130
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131 return 1;
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132 }
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133
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134 void QZ_TearDownOpenGL (_THIS) {
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135
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136 [ NSOpenGLContext clearCurrentContext ];
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137 [ gl_context clearDrawable ];
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138 [ gl_context release ];
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139 }
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140
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141
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142 /* SDL OpenGL functions */
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143
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144 int QZ_GL_LoadLibrary (_THIS, const char *location) {
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145 this->gl_config.driver_loaded = 1;
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146 return 1;
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147 }
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148
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149 void* QZ_GL_GetProcAddress (_THIS, const char *proc) {
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150
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151 /* We may want to cache the bundleRef at some point */
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152 CFBundleRef bundle;
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153 CFURLRef bundleURL = CFURLCreateWithFileSystemPath (kCFAllocatorDefault,
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154 CFSTR("/System/Library/Frameworks/OpenGL.framework"), kCFURLPOSIXPathStyle, true);
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155
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156 CFStringRef functionName = CFStringCreateWithCString
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157 (kCFAllocatorDefault, proc, kCFStringEncodingASCII);
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158
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159 void *function;
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160
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161 bundle = CFBundleCreate (kCFAllocatorDefault, bundleURL);
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162 assert (bundle != NULL);
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163
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164 function = CFBundleGetFunctionPointerForName (bundle, functionName);
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165
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166 CFRelease ( bundleURL );
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167 CFRelease ( functionName );
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168 CFRelease ( bundle );
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169
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170 return function;
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171 }
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172
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173 int QZ_GL_GetAttribute (_THIS, SDL_GLattr attrib, int* value) {
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174
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175 GLenum attr = 0;
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176
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177 QZ_GL_MakeCurrent (this);
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178
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179 switch (attrib) {
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180 case SDL_GL_RED_SIZE: attr = GL_RED_BITS; break;
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181 case SDL_GL_BLUE_SIZE: attr = GL_BLUE_BITS; break;
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182 case SDL_GL_GREEN_SIZE: attr = GL_GREEN_BITS; break;
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183 case SDL_GL_ALPHA_SIZE: attr = GL_ALPHA_BITS; break;
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184 case SDL_GL_DOUBLEBUFFER: attr = GL_DOUBLEBUFFER; break;
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185 case SDL_GL_DEPTH_SIZE: attr = GL_DEPTH_BITS; break;
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186 case SDL_GL_STENCIL_SIZE: attr = GL_STENCIL_BITS; break;
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187 case SDL_GL_ACCUM_RED_SIZE: attr = GL_ACCUM_RED_BITS; break;
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188 case SDL_GL_ACCUM_GREEN_SIZE: attr = GL_ACCUM_GREEN_BITS; break;
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189 case SDL_GL_ACCUM_BLUE_SIZE: attr = GL_ACCUM_BLUE_BITS; break;
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190 case SDL_GL_ACCUM_ALPHA_SIZE: attr = GL_ACCUM_ALPHA_BITS; break;
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191 case SDL_GL_STEREO: attr = GL_STEREO; break;
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192 case SDL_GL_MULTISAMPLEBUFFERS: attr = GL_SAMPLE_BUFFERS_ARB; break;
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193 case SDL_GL_MULTISAMPLESAMPLES: attr = GL_SAMPLES_ARB; break;
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194 case SDL_GL_BUFFER_SIZE:
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195 {
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196 GLint bits = 0;
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197 GLint component;
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198
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199 /* there doesn't seem to be a single flag in OpenGL for this! */
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200 glGetIntegerv (GL_RED_BITS, &component); bits += component;
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201 glGetIntegerv (GL_GREEN_BITS,&component); bits += component;
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202 glGetIntegerv (GL_BLUE_BITS, &component); bits += component;
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203 glGetIntegerv (GL_ALPHA_BITS, &component); bits += component;
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diff changeset
204
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diff changeset
205 *value = bits;
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206 }
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207 return 0;
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diff changeset
208 }
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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diff changeset
209
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diff changeset
210 glGetIntegerv (attr, (GLint *)value);
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diff changeset
211 return 0;
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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diff changeset
212 }
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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diff changeset
213
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diff changeset
214 int QZ_GL_MakeCurrent (_THIS) {
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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diff changeset
215 [ gl_context makeCurrentContext ];
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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diff changeset
216 return 0;
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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parents:
diff changeset
217 }
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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parents:
diff changeset
218
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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diff changeset
219 void QZ_GL_SwapBuffers (_THIS) {
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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220 [ gl_context flushBuffer ];
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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221 }