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annotate src/video/quartz/SDL_QuartzGL.m @ 857:ce05e92d909b

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Attempt to get FSAA compiling on all versions of MacOS X.
author Ryan C. Gordon <icculus@icculus.org>
date Thu, 26 Feb 2004 08:57:32 +0000
parents ac44ddb84f6f
children 416158ec61a0
rev   line source
761
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Sam Lantinga <slouken@libsdl.org>
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1 /*
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2 SDL - Simple DirectMedia Layer
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Sam Lantinga <slouken@libsdl.org>
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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
857
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25 /*
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26 * GL_ARB_Multisample is supposed to be available in 10.1, according to Apple:
ce05e92d909b Attempt to get FSAA compiling on all versions of MacOS X.
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parents: 770
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27 *
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28 * http://developer.apple.com/opengl/extensions.html#GL_ARB_multisample
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29 *
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30 * ...but it isn't in the system headers, according to Sam:
ce05e92d909b Attempt to get FSAA compiling on all versions of MacOS X.
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parents: 770
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31 *
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32 * http://www.libsdl.org/pipermail/sdl/2003-December/058335.html
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33 *
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34 * These are normally enums and not #defines in the system headers.
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35 *
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36 * --ryan.
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37 */
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38 #if (MAC_OS_X_VERSION_MAX_ALLOWED < 1020)
ce05e92d909b Attempt to get FSAA compiling on all versions of MacOS X.
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39 #define NSOpenGLPFASampleBuffers ((NSOpenGLPixelFormatAttribute) 55)
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40 #define NSOpenGLPFASamples ((NSOpenGLPixelFormatAttribute) 56)
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41 #endif
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42
761
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43
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44 @implementation NSOpenGLContext (CGLContextAccess)
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45 - (CGLContextObj) cglContext;
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46 {
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47 return _contextAuxiliary;
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48 }
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49 @end
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50
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51 /* OpenGL helper functions (used internally) */
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52
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53 int QZ_SetupOpenGL (_THIS, int bpp, Uint32 flags) {
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54
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55 NSOpenGLPixelFormatAttribute attr[32];
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56 NSOpenGLPixelFormat *fmt;
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57 int i = 0;
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58 int colorBits = bpp;
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59
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60 if ( flags & SDL_FULLSCREEN ) {
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61
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62 attr[i++] = NSOpenGLPFAFullScreen;
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63 }
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64 /* In windowed mode, the OpenGL pixel depth must match device pixel depth */
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65 else if ( colorBits != device_bpp ) {
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66
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67 colorBits = device_bpp;
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68 }
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69
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70 attr[i++] = NSOpenGLPFAColorSize;
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71 attr[i++] = colorBits;
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72
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73 attr[i++] = NSOpenGLPFADepthSize;
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74 attr[i++] = this->gl_config.depth_size;
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75
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76 if ( this->gl_config.double_buffer ) {
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77 attr[i++] = NSOpenGLPFADoubleBuffer;
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78 }
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79
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80 if ( this->gl_config.stereo ) {
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81 attr[i++] = NSOpenGLPFAStereo;
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82 }
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83
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84 if ( this->gl_config.stencil_size != 0 ) {
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85 attr[i++] = NSOpenGLPFAStencilSize;
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86 attr[i++] = this->gl_config.stencil_size;
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87 }
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88
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89 if ( this->gl_config.multisamplebuffers != 0 ) {
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90 attr[i++] = NSOpenGLPFASampleBuffers;
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91 attr[i++] = this->gl_config.multisamplebuffers;
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92 }
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93
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94 if ( this->gl_config.multisamplesamples != 0 ) {
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95 attr[i++] = NSOpenGLPFASamples;
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96 attr[i++] = this->gl_config.multisamplesamples;
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97 }
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98
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99 attr[i++] = NSOpenGLPFAScreenMask;
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100 attr[i++] = CGDisplayIDToOpenGLDisplayMask (display_id);
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101 attr[i] = 0;
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102
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103 fmt = [ [ NSOpenGLPixelFormat alloc ] initWithAttributes:attr ];
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104 if (fmt == nil) {
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105 SDL_SetError ("Failed creating OpenGL pixel format");
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106 return 0;
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107 }
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108
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109 gl_context = [ [ NSOpenGLContext alloc ] initWithFormat:fmt
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110 shareContext:nil];
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111
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112 if (gl_context == nil) {
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113 SDL_SetError ("Failed creating OpenGL context");
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114 return 0;
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115 }
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116
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117 /*
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118 * Wisdom from Apple engineer in reference to UT2003's OpenGL performance:
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119 * "You are blowing a couple of the internal OpenGL function caches. This
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120 * appears to be happening in the VAO case. You can tell OpenGL to up
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121 * the cache size by issuing the following calls right after you create
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122 * the OpenGL context. The default cache size is 16." --ryan.
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123 */
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124
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125 #ifndef GLI_ARRAY_FUNC_CACHE_MAX
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126 #define GLI_ARRAY_FUNC_CACHE_MAX 284
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127 #endif
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128
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129 #ifndef GLI_SUBMIT_FUNC_CACHE_MAX
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130 #define GLI_SUBMIT_FUNC_CACHE_MAX 280
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131 #endif
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132
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133 {
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134 long cache_max = 64;
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135 CGLContextObj ctx = [ gl_context cglContext ];
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136 CGLSetParameter (ctx, GLI_SUBMIT_FUNC_CACHE_MAX, &cache_max);
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137 CGLSetParameter (ctx, GLI_ARRAY_FUNC_CACHE_MAX, &cache_max);
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138 }
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139
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140 /* End Wisdom from Apple Engineer section. --ryan. */
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141
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142 /* Convince SDL that the GL "driver" is loaded */
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143 this->gl_config.driver_loaded = 1;
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144
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145 [ fmt release ];
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146
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147 return 1;
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148 }
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149
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150 void QZ_TearDownOpenGL (_THIS) {
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151
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152 [ NSOpenGLContext clearCurrentContext ];
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153 [ gl_context clearDrawable ];
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154 [ gl_context release ];
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155 }
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156
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157
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158 /* SDL OpenGL functions */
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159
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160 int QZ_GL_LoadLibrary (_THIS, const char *location) {
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161 this->gl_config.driver_loaded = 1;
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162 return 1;
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163 }
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164
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165 void* QZ_GL_GetProcAddress (_THIS, const char *proc) {
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166
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167 /* We may want to cache the bundleRef at some point */
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168 CFBundleRef bundle;
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169 CFURLRef bundleURL = CFURLCreateWithFileSystemPath (kCFAllocatorDefault,
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170 CFSTR("/System/Library/Frameworks/OpenGL.framework"), kCFURLPOSIXPathStyle, true);
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171
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172 CFStringRef functionName = CFStringCreateWithCString
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173 (kCFAllocatorDefault, proc, kCFStringEncodingASCII);
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174
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175 void *function;
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176
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177 bundle = CFBundleCreate (kCFAllocatorDefault, bundleURL);
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178 assert (bundle != NULL);
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179
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180 function = CFBundleGetFunctionPointerForName (bundle, functionName);
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181
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182 CFRelease ( bundleURL );
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183 CFRelease ( functionName );
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184 CFRelease ( bundle );
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185
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186 return function;
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187 }
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188
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189 int QZ_GL_GetAttribute (_THIS, SDL_GLattr attrib, int* value) {
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190
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191 GLenum attr = 0;
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192
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193 QZ_GL_MakeCurrent (this);
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194
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195 switch (attrib) {
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196 case SDL_GL_RED_SIZE: attr = GL_RED_BITS; break;
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197 case SDL_GL_BLUE_SIZE: attr = GL_BLUE_BITS; break;
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198 case SDL_GL_GREEN_SIZE: attr = GL_GREEN_BITS; break;
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199 case SDL_GL_ALPHA_SIZE: attr = GL_ALPHA_BITS; break;
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200 case SDL_GL_DOUBLEBUFFER: attr = GL_DOUBLEBUFFER; break;
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201 case SDL_GL_DEPTH_SIZE: attr = GL_DEPTH_BITS; break;
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202 case SDL_GL_STENCIL_SIZE: attr = GL_STENCIL_BITS; break;
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203 case SDL_GL_ACCUM_RED_SIZE: attr = GL_ACCUM_RED_BITS; break;
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204 case SDL_GL_ACCUM_GREEN_SIZE: attr = GL_ACCUM_GREEN_BITS; break;
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205 case SDL_GL_ACCUM_BLUE_SIZE: attr = GL_ACCUM_BLUE_BITS; break;
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206 case SDL_GL_ACCUM_ALPHA_SIZE: attr = GL_ACCUM_ALPHA_BITS; break;
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207 case SDL_GL_STEREO: attr = GL_STEREO; break;
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208 case SDL_GL_MULTISAMPLEBUFFERS: attr = GL_SAMPLE_BUFFERS_ARB; break;
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209 case SDL_GL_MULTISAMPLESAMPLES: attr = GL_SAMPLES_ARB; break;
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210 case SDL_GL_BUFFER_SIZE:
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211 {
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212 GLint bits = 0;
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213 GLint component;
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214
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215 /* there doesn't seem to be a single flag in OpenGL for this! */
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216 glGetIntegerv (GL_RED_BITS, &component); bits += component;
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217 glGetIntegerv (GL_GREEN_BITS,&component); bits += component;
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218 glGetIntegerv (GL_BLUE_BITS, &component); bits += component;
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219 glGetIntegerv (GL_ALPHA_BITS, &component); bits += component;
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220
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221 *value = bits;
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222 }
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223 return 0;
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224 }
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225
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226 glGetIntegerv (attr, (GLint *)value);
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227 return 0;
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228 }
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229
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230 int QZ_GL_MakeCurrent (_THIS) {
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231 [ gl_context makeCurrentContext ];
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232 return 0;
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233 }
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234
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235 void QZ_GL_SwapBuffers (_THIS) {
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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236 [ gl_context flushBuffer ];
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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237 }