Date: Sat, 10 Apr 2004 10:05:46 +0200
authorSam Lantinga
Sun, 16 May 2004 18:06:27 +0000
changeset 890416158ec61a0
parent 889 eac8c69b5706
child 891 ab40b9b2d0d5
Date: Sat, 10 Apr 2004 10:05:46 +0200
From: Christian Walther
Subject: [SDL] OpenGL Accumulation Buffer on Mac OS X

Is there a reason for not having OpenGL accumulation buffer support in
SDL 1.2.7 (and as far as I have checked also in the current CVS) on Mac OS
X?

Maybe I am doing something wrong, but it seems very easy to add (at least
it works for for me in 10.3.3) - just add

if ( this->gl_config.accum_red_size + this->gl_config.accum_green_size + this->gl_config.accum_blue_size + this->gl_config.accum_alpha_size > 0) {
attr[i++] = NSOpenGLPFAAccumSize;
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;
}

to QZ_SetupOpenGL() in SDL_QuartzGL.m
src/video/quartz/SDL_QuartzGL.m
     1.1 --- a/src/video/quartz/SDL_QuartzGL.m	Sun May 16 18:02:48 2004 +0000
     1.2 +++ b/src/video/quartz/SDL_QuartzGL.m	Sun May 16 18:06:27 2004 +0000
     1.3 @@ -86,6 +86,14 @@
     1.4          attr[i++] = this->gl_config.stencil_size;
     1.5      }
     1.6  
     1.7 +    if ( (this->gl_config.accum_red_size +
     1.8 +          this->gl_config.accum_green_size +
     1.9 +          this->gl_config.accum_blue_size +
    1.10 +          this->gl_config.accum_alpha_size) > 0 ) {
    1.11 +        attr[i++] = NSOpenGLPFAAccumSize;
    1.12 +        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;
    1.13 +    }
    1.14 +
    1.15      if ( this->gl_config.multisamplebuffers != 0 ) {
    1.16          attr[i++] = NSOpenGLPFASampleBuffers;
    1.17          attr[i++] = this->gl_config.multisamplebuffers;