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DXT1a single color compressor. Fixes issue 131.

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Init single color tables at startup.
This commit is contained in:
castano
2010-07-22 09:23:17 +00:00
parent da548fd03a
commit ac7c017c35
12 changed files with 1384 additions and 1853 deletions
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31
src/nvtt/OptimalCompressDXT.cpp
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@ -266,18 +266,27 @@ void OptimalCompress::compressDXT1(Color32 c, BlockDXT1 * dxtBlock)
}
}
void OptimalCompress::compressDXT1a(Color32 rgba, BlockDXT1 * dxtBlock)
void OptimalCompress::compressDXT1a(Color32 c, uint alphaMask, BlockDXT1 * dxtBlock)
{
if (rgba.a < 128)
{
dxtBlock->col0.u = 0;
dxtBlock->col1.u = 0;
dxtBlock->indices = 0xFFFFFFFF;
}
else
{
compressDXT1(rgba, dxtBlock);
}
if (alphaMask == 0) {
compressDXT1(c, dxtBlock);
}
else {
dxtBlock->col0.r = OMatchAlpha5[c.r][0];
dxtBlock->col0.g = OMatchAlpha6[c.g][0];
dxtBlock->col0.b = OMatchAlpha5[c.b][0];
dxtBlock->col1.r = OMatchAlpha5[c.r][1];
dxtBlock->col1.g = OMatchAlpha6[c.g][1];
dxtBlock->col1.b = OMatchAlpha5[c.b][1];
dxtBlock->indices = 0xaaaaaaaa; // 0b1010..1010
if (dxtBlock->col0.u > dxtBlock->col1.u)
{
swap(dxtBlock->col0.u, dxtBlock->col1.u);
}
dxtBlock->indices |= alphaMask;
}
}
void OptimalCompress::compressDXT1G(uint8 g, BlockDXT1 * dxtBlock)