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XQuartz: GL: Handle the alpha differently when the alpha is equal to GLCAPS_COLOR_BUF_INVALID_VALUE.

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This prevents visuals with odd sizes.  The machine I use didn't have
this problem, but it shows up on some others.
This commit is contained in:
George Staplin 2008-11-12 17:17:25 -07:00
parent 373b8a5f32
commit ed181382dd
1 changed files with 24 additions and 6 deletions
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30
hw/xquartz/GL/visualConfigs.c
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@ -149,12 +149,30 @@ void setVisualConfigs(void) {
visualConfigs[i].redSize = conf->color_buffers[color].r;
visualConfigs[i].greenSize = conf->color_buffers[color].g;
visualConfigs[i].blueSize = conf->color_buffers[color].b;
visualConfigs[i].alphaSize = conf->color_buffers[color].a;
visualConfigs[i].bufferSize = conf->color_buffers[color].r +
conf->color_buffers[color].g + conf->color_buffers[color].b +
conf->color_buffers[color].a;
if(GLCAPS_COLOR_BUF_INVALID_VALUE == conf->color_buffers[color].a) {
/* This visual has no alpha. */
visualConfigs[i].alphaSize = 0;
} else {
visualConfigs[i].alphaSize = conf->color_buffers[color].a;
}
/*
* If the .a/alpha value is unset, then don't add it to the
* bufferSize specification. The INVALID_VALUE indicates that it
* was unset.
*
* This prevents odd bufferSizes, such as 14.
*/
if(GLCAPS_COLOR_BUF_INVALID_VALUE == conf->color_buffers[color].a) {
visualConfigs[i].bufferSize = conf->color_buffers[color].r +
conf->color_buffers[color].g + conf->color_buffers[color].b;
} else {
visualConfigs[i].bufferSize = conf->color_buffers[color].r +
conf->color_buffers[color].g + conf->color_buffers[color].b +
conf->color_buffers[color].a;
}
/*
* I'm uncertain about these masks.
* I don't think we actually care what the values are in our