src/video/quartz/SDL_QuartzGL.m
author Ryan C. Gordon <icculus@icculus.org>
Sun, 20 Nov 2005 23:59:26 +0000
changeset 1177 e967ab22e6fd
parent 1160 72c6c3e5bb85
child 1181 49d3efec6651
permissions -rw-r--r--
SDL_GL_LoadLibrary() was returning 1, and not 0, to signify "success" on the Quartz target...fixed this to match the documented behaviour.
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/*
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    SDL - Simple DirectMedia Layer
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    Copyright (C) 1997-2003  Sam Lantinga
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    This library is free software; you can redistribute it and/or
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    modify it under the terms of the GNU Library General Public
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    License as published by the Free Software Foundation; either
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    version 2 of the License, or (at your option) any later version.
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    This library is distributed in the hope that it will be useful,
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    but WITHOUT ANY WARRANTY; without even the implied warranty of
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    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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    Library General Public License for more details.
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    You should have received a copy of the GNU Library General Public
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    License along with this library; if not, write to the Free
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    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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    Sam Lantinga
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    slouken@libsdl.org
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*/
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#include "SDL_QuartzVideo.h"
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/*
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 * GL_ARB_Multisample is supposed to be available in 10.1, according to Apple:
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 *
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 *   http://developer.apple.com/opengl/extensions.html#GL_ARB_multisample
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 *
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 *  ...but it isn't in the system headers, according to Sam:
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 *
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 *   http://www.libsdl.org/pipermail/sdl/2003-December/058335.html
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 *
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 * These are normally enums and not #defines in the system headers.
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 *
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 *   --ryan.
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 */
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#if (MAC_OS_X_VERSION_MAX_ALLOWED < 1020)
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#define NSOpenGLPFASampleBuffers ((NSOpenGLPixelFormatAttribute) 55)
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#define NSOpenGLPFASamples ((NSOpenGLPixelFormatAttribute) 56)
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#endif
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@implementation NSOpenGLContext (CGLContextAccess)
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- (CGLContextObj) cglContext;
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{
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    return _contextAuxiliary;
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}
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@end
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/* OpenGL helper functions (used internally) */
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int QZ_SetupOpenGL (_THIS, int bpp, Uint32 flags) {
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    NSOpenGLPixelFormatAttribute attr[32];
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    NSOpenGLPixelFormat *fmt;
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    int i = 0;
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    int colorBits = bpp;
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    if ( flags & SDL_FULLSCREEN ) {
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        attr[i++] = NSOpenGLPFAFullScreen;
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    }
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    /* In windowed mode, the OpenGL pixel depth must match device pixel depth */
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    else if ( colorBits != device_bpp ) {
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        colorBits = device_bpp;
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    }
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    attr[i++] = NSOpenGLPFAColorSize;
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    attr[i++] = colorBits;
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    attr[i++] = NSOpenGLPFADepthSize;
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    attr[i++] = this->gl_config.depth_size;
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    if ( this->gl_config.double_buffer ) {
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        attr[i++] = NSOpenGLPFADoubleBuffer;
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    }
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    if ( this->gl_config.stereo ) {
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        attr[i++] = NSOpenGLPFAStereo;
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    }
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    if ( this->gl_config.stencil_size != 0 ) {
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        attr[i++] = NSOpenGLPFAStencilSize;
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        attr[i++] = this->gl_config.stencil_size;
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    }
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    if ( (this->gl_config.accum_red_size +
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          this->gl_config.accum_green_size +
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          this->gl_config.accum_blue_size +
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          this->gl_config.accum_alpha_size) > 0 ) {
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        attr[i++] = NSOpenGLPFAAccumSize;
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        attr[i++] = this->gl_config.accum_red_size + this->gl_config.accum_green_size + this->gl_config.accum_blue_size + this->gl_config.accum_alpha_size;
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    }
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    if ( this->gl_config.multisamplebuffers != 0 ) {
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        attr[i++] = NSOpenGLPFASampleBuffers;
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        attr[i++] = this->gl_config.multisamplebuffers;
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    }
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    if ( this->gl_config.multisamplesamples != 0 ) {
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        attr[i++] = NSOpenGLPFASamples;
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        attr[i++] = this->gl_config.multisamplesamples;
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        attr[i++] = NSOpenGLPFANoRecovery;
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        attr[i++] = (NSOpenGLPixelFormatAttribute)nil;
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    }
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    attr[i++] = NSOpenGLPFAScreenMask;
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    attr[i++] = CGDisplayIDToOpenGLDisplayMask (display_id);
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    attr[i] = 0;
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    fmt = [ [ NSOpenGLPixelFormat alloc ] initWithAttributes:attr ];
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    if (fmt == nil) {
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        SDL_SetError ("Failed creating OpenGL pixel format");
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        return 0;
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    }
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    gl_context = [ [ NSOpenGLContext alloc ] initWithFormat:fmt
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                                               shareContext:nil];
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72c6c3e5bb85 Closed a memory leak caused when quitting video subsystem on Quartz target.
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    [ fmt release ];
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diff changeset
   123
761
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   124
    if (gl_context == nil) {
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   125
        SDL_SetError ("Failed creating OpenGL context");
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   126
        return 0;
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   127
    }
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   128
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   129
    /*
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     * Wisdom from Apple engineer in reference to UT2003's OpenGL performance:
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   131
     *  "You are blowing a couple of the internal OpenGL function caches. This
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   132
     *  appears to be happening in the VAO case.  You can tell OpenGL to up
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   133
     *  the cache size by issuing the following calls right after you create
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   134
     *  the OpenGL context.  The default cache size is 16."    --ryan.
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   135
     */
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   136
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   137
    #ifndef GLI_ARRAY_FUNC_CACHE_MAX
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   138
    #define GLI_ARRAY_FUNC_CACHE_MAX 284
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   139
    #endif
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   140
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   141
    #ifndef GLI_SUBMIT_FUNC_CACHE_MAX
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   142
    #define GLI_SUBMIT_FUNC_CACHE_MAX 280
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   143
    #endif
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   144
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   145
    {
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   146
        long cache_max = 64;
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   147
        CGLContextObj ctx = [ gl_context cglContext ];
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   148
        CGLSetParameter (ctx, GLI_SUBMIT_FUNC_CACHE_MAX, &cache_max);
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   149
        CGLSetParameter (ctx, GLI_ARRAY_FUNC_CACHE_MAX, &cache_max);
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   150
    }
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   151
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   152
    /* End Wisdom from Apple Engineer section. --ryan. */
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   153
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   154
    /* Convince SDL that the GL "driver" is loaded */
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   155
    this->gl_config.driver_loaded = 1;
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   156
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   157
    return 1;
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   158
}
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   159
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   160
void QZ_TearDownOpenGL (_THIS) {
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   161
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   162
    [ NSOpenGLContext clearCurrentContext ];
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   163
    [ gl_context clearDrawable ];
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   164
    [ gl_context release ];
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   165
}
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   166
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   167
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   168
/* SDL OpenGL functions */
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   169
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   170
int    QZ_GL_LoadLibrary    (_THIS, const char *location) {
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   171
    this->gl_config.driver_loaded = 1;
1177
e967ab22e6fd SDL_GL_LoadLibrary() was returning 1, and not 0, to signify "success" on the
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   172
    return 0;
761
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   173
}
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   174
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   175
void*  QZ_GL_GetProcAddress (_THIS, const char *proc) {
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   176
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   177
    /* We may want to cache the bundleRef at some point */
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   178
    CFBundleRef bundle;
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   179
    CFURLRef bundleURL = CFURLCreateWithFileSystemPath (kCFAllocatorDefault,
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   180
                                                        CFSTR("/System/Library/Frameworks/OpenGL.framework"), kCFURLPOSIXPathStyle, true);
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   181
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   182
    CFStringRef functionName = CFStringCreateWithCString
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   183
        (kCFAllocatorDefault, proc, kCFStringEncodingASCII);
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   184
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   185
    void *function;
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   186
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   187
    bundle = CFBundleCreate (kCFAllocatorDefault, bundleURL);
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   188
    assert (bundle != NULL);
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   189
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   190
    function = CFBundleGetFunctionPointerForName (bundle, functionName);
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   191
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   192
    CFRelease ( bundleURL );
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   193
    CFRelease ( functionName );
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   194
    CFRelease ( bundle );
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   195
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   196
    return function;
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   197
}
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   198
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   199
int    QZ_GL_GetAttribute   (_THIS, SDL_GLattr attrib, int* value) {
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   200
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   201
    GLenum attr = 0;
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   202
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   203
    QZ_GL_MakeCurrent (this);
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   204
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   205
    switch (attrib) {
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   206
        case SDL_GL_RED_SIZE: attr = GL_RED_BITS;   break;
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   207
        case SDL_GL_BLUE_SIZE: attr = GL_BLUE_BITS;  break;
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   208
        case SDL_GL_GREEN_SIZE: attr = GL_GREEN_BITS; break;
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   209
        case SDL_GL_ALPHA_SIZE: attr = GL_ALPHA_BITS; break;
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   210
        case SDL_GL_DOUBLEBUFFER: attr = GL_DOUBLEBUFFER; break;
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   211
        case SDL_GL_DEPTH_SIZE: attr = GL_DEPTH_BITS;  break;
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   212
        case SDL_GL_STENCIL_SIZE: attr = GL_STENCIL_BITS; break;
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   213
        case SDL_GL_ACCUM_RED_SIZE: attr = GL_ACCUM_RED_BITS; break;
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   214
        case SDL_GL_ACCUM_GREEN_SIZE: attr = GL_ACCUM_GREEN_BITS; break;
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   215
        case SDL_GL_ACCUM_BLUE_SIZE: attr = GL_ACCUM_BLUE_BITS; break;
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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diff changeset
   216
        case SDL_GL_ACCUM_ALPHA_SIZE: attr = GL_ACCUM_ALPHA_BITS; break;
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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diff changeset
   217
        case SDL_GL_STEREO: attr = GL_STEREO; break;
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   218
        case SDL_GL_MULTISAMPLEBUFFERS: attr = GL_SAMPLE_BUFFERS_ARB; break;
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   219
        case SDL_GL_MULTISAMPLESAMPLES: attr = GL_SAMPLES_ARB; break;
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   220
        case SDL_GL_BUFFER_SIZE:
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   221
        {
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   222
            GLint bits = 0;
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   223
            GLint component;
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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diff changeset
   224
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   225
            /* there doesn't seem to be a single flag in OpenGL for this! */
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   226
            glGetIntegerv (GL_RED_BITS, &component);   bits += component;
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   227
            glGetIntegerv (GL_GREEN_BITS,&component);  bits += component;
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   228
            glGetIntegerv (GL_BLUE_BITS, &component);  bits += component;
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   229
            glGetIntegerv (GL_ALPHA_BITS, &component); bits += component;
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   230
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   231
            *value = bits;
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   232
        }
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   233
        return 0;
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   234
    }
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   235
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   236
    glGetIntegerv (attr, (GLint *)value);
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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diff changeset
   237
    return 0;
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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diff changeset
   238
}
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   239
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   240
int    QZ_GL_MakeCurrent    (_THIS) {
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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diff changeset
   241
    [ gl_context makeCurrentContext ];
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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parents:
diff changeset
   242
    return 0;
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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diff changeset
   243
}
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   244
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   245
void   QZ_GL_SwapBuffers    (_THIS) {
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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   246
    [ gl_context flushBuffer ];
c5b2b6d2d1fe Date: Wed, 31 Dec 2003 21:55:30 +0100
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}