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annotate src/video/quartz/SDL_QuartzGL.m @ 769:b8d311d90021

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Updated copyright information for 2004 (Happy New Year!)
author Sam Lantinga <slouken@libsdl.org>
date Sun, 04 Jan 2004 16:49:27 +0000
parents c5b2b6d2d1fe
children ac44ddb84f6f
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 This is a workaround to directly access NSOpenGLContext's CGL context
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27 We need this to check for errors NSOpenGLContext doesn't support
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28 */
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29 @interface NSOpenGLContext (CGLContextAccess)
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30 - (CGLContextObj) cglContext;
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31 @end
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32
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33 @implementation NSOpenGLContext (CGLContextAccess)
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34 - (CGLContextObj) cglContext;
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35 {
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36 return _contextAuxiliary;
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37 }
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38 @end
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39
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40 /* OpenGL helper functions (used internally) */
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41
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42 int QZ_SetupOpenGL (_THIS, int bpp, Uint32 flags) {
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43
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44 NSOpenGLPixelFormatAttribute attr[32];
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45 NSOpenGLPixelFormat *fmt;
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46 int i = 0;
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47 int colorBits = bpp;
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48
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49 if ( flags & SDL_FULLSCREEN ) {
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50
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51 attr[i++] = NSOpenGLPFAFullScreen;
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52 }
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53 /* In windowed mode, the OpenGL pixel depth must match device pixel depth */
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54 else if ( colorBits != device_bpp ) {
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55
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56 colorBits = device_bpp;
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57 }
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58
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59 attr[i++] = NSOpenGLPFAColorSize;
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60 attr[i++] = colorBits;
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61
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62 attr[i++] = NSOpenGLPFADepthSize;
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63 attr[i++] = this->gl_config.depth_size;
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64
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65 if ( this->gl_config.double_buffer ) {
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66 attr[i++] = NSOpenGLPFADoubleBuffer;
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67 }
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68
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69 if ( this->gl_config.stereo ) {
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70 attr[i++] = NSOpenGLPFAStereo;
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71 }
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72
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73 if ( this->gl_config.stencil_size != 0 ) {
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74 attr[i++] = NSOpenGLPFAStencilSize;
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75 attr[i++] = this->gl_config.stencil_size;
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76 }
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77
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78 #if NSOPENGL_CURRENT_VERSION > 1 /* What version should this be? */
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79 if ( this->gl_config.multisamplebuffers != 0 ) {
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80 attr[i++] = NSOpenGLPFASampleBuffers;
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81 attr[i++] = this->gl_config.multisamplebuffers;
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82 }
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83
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84 if ( this->gl_config.multisamplesamples != 0 ) {
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85 attr[i++] = NSOpenGLPFASamples;
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86 attr[i++] = this->gl_config.multisamplesamples;
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87 }
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88 #endif
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89
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90 attr[i++] = NSOpenGLPFAScreenMask;
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91 attr[i++] = CGDisplayIDToOpenGLDisplayMask (display_id);
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92 attr[i] = 0;
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93
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94 fmt = [ [ NSOpenGLPixelFormat alloc ] initWithAttributes:attr ];
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95 if (fmt == nil) {
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96 SDL_SetError ("Failed creating OpenGL pixel format");
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97 return 0;
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98 }
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99
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100 gl_context = [ [ NSOpenGLContext alloc ] initWithFormat:fmt
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101 shareContext:nil];
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102
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103 if (gl_context == nil) {
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104 SDL_SetError ("Failed creating OpenGL context");
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105 return 0;
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106 }
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107
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108 /*
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109 * Wisdom from Apple engineer in reference to UT2003's OpenGL performance:
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110 * "You are blowing a couple of the internal OpenGL function caches. This
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111 * appears to be happening in the VAO case. You can tell OpenGL to up
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112 * the cache size by issuing the following calls right after you create
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113 * the OpenGL context. The default cache size is 16." --ryan.
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114 */
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115
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116 #ifndef GLI_ARRAY_FUNC_CACHE_MAX
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117 #define GLI_ARRAY_FUNC_CACHE_MAX 284
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118 #endif
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119
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120 #ifndef GLI_SUBMIT_FUNC_CACHE_MAX
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121 #define GLI_SUBMIT_FUNC_CACHE_MAX 280
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122 #endif
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123
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124 {
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125 long cache_max = 64;
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126 CGLContextObj ctx = [ gl_context cglContext ];
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127 CGLSetParameter (ctx, GLI_SUBMIT_FUNC_CACHE_MAX, &cache_max);
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128 CGLSetParameter (ctx, GLI_ARRAY_FUNC_CACHE_MAX, &cache_max);
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129 }
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130
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131 /* End Wisdom from Apple Engineer section. --ryan. */
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132
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133 /* Convince SDL that the GL "driver" is loaded */
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134 this->gl_config.driver_loaded = 1;
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135
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136 [ fmt release ];
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137
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138 return 1;
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139 }
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140
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141 void QZ_TearDownOpenGL (_THIS) {
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142
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143 [ NSOpenGLContext clearCurrentContext ];
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144 [ gl_context clearDrawable ];
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145 [ gl_context release ];
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146 }
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147
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148
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149 /* SDL OpenGL functions */
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150
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151 int QZ_GL_LoadLibrary (_THIS, const char *location) {
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152 this->gl_config.driver_loaded = 1;
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153 return 1;
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154 }
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155
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156 void* QZ_GL_GetProcAddress (_THIS, const char *proc) {
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157
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158 /* We may want to cache the bundleRef at some point */
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159 CFBundleRef bundle;
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160 CFURLRef bundleURL = CFURLCreateWithFileSystemPath (kCFAllocatorDefault,
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161 CFSTR("/System/Library/Frameworks/OpenGL.framework"), kCFURLPOSIXPathStyle, true);
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162
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163 CFStringRef functionName = CFStringCreateWithCString
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164 (kCFAllocatorDefault, proc, kCFStringEncodingASCII);
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165
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166 void *function;
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167
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168 bundle = CFBundleCreate (kCFAllocatorDefault, bundleURL);
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169 assert (bundle != NULL);
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170
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171 function = CFBundleGetFunctionPointerForName (bundle, functionName);
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172
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173 CFRelease ( bundleURL );
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174 CFRelease ( functionName );
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175 CFRelease ( bundle );
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176
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177 return function;
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178 }
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179
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180 int QZ_GL_GetAttribute (_THIS, SDL_GLattr attrib, int* value) {
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181
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182 GLenum attr = 0;
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183
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184 QZ_GL_MakeCurrent (this);
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185
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186 switch (attrib) {
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187 case SDL_GL_RED_SIZE: attr = GL_RED_BITS; break;
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188 case SDL_GL_BLUE_SIZE: attr = GL_BLUE_BITS; break;
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189 case SDL_GL_GREEN_SIZE: attr = GL_GREEN_BITS; break;
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190 case SDL_GL_ALPHA_SIZE: attr = GL_ALPHA_BITS; break;
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191 case SDL_GL_DOUBLEBUFFER: attr = GL_DOUBLEBUFFER; break;
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192 case SDL_GL_DEPTH_SIZE: attr = GL_DEPTH_BITS; break;
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193 case SDL_GL_STENCIL_SIZE: attr = GL_STENCIL_BITS; break;
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194 case SDL_GL_ACCUM_RED_SIZE: attr = GL_ACCUM_RED_BITS; break;
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195 case SDL_GL_ACCUM_GREEN_SIZE: attr = GL_ACCUM_GREEN_BITS; break;
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196 case SDL_GL_ACCUM_BLUE_SIZE: attr = GL_ACCUM_BLUE_BITS; break;
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197 case SDL_GL_ACCUM_ALPHA_SIZE: attr = GL_ACCUM_ALPHA_BITS; break;
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198 case SDL_GL_STEREO: attr = GL_STEREO; break;
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199 case SDL_GL_MULTISAMPLEBUFFERS: attr = GL_SAMPLE_BUFFERS_ARB; break;
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200 case SDL_GL_MULTISAMPLESAMPLES: attr = GL_SAMPLES_ARB; break;
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201 case SDL_GL_BUFFER_SIZE:
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202 {
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203 GLint bits = 0;
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204 GLint component;
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205
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206 /* there doesn't seem to be a single flag in OpenGL for this! */
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207 glGetIntegerv (GL_RED_BITS, &component); bits += component;
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208 glGetIntegerv (GL_GREEN_BITS,&component); bits += component;
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209 glGetIntegerv (GL_BLUE_BITS, &component); bits += component;
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210 glGetIntegerv (GL_ALPHA_BITS, &component); bits += component;
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211
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212 *value = bits;
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213 }
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214 return 0;
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215 }
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216
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217 glGetIntegerv (attr, (GLint *)value);
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218 return 0;
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219 }
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220
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221 int QZ_GL_MakeCurrent (_THIS) {
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222 [ gl_context makeCurrentContext ];
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223 return 0;
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224 }
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225
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226 void QZ_GL_SwapBuffers (_THIS) {
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227 [ gl_context flushBuffer ];
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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228 }