drewcassidy/nvidia-texture-tools
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Add support for alpha modes in the CPU compressors. Fixes issue 30.

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This commit is contained in:
castano 2008-11-24 10:34:16 +00:00
parent bb69acec6c
commit a4f56b65b8
1 changed files with 15 additions and 3 deletions
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18
src/nvtt/CompressDXT.cpp
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@ -292,6 +292,12 @@ void nv::SlowCompressor::compressDXT3(const CompressionOptions::Private & compre
nvsquish::WeightedClusterFit fit;
fit.SetMetric(compressionOptions.colorWeight.x(), compressionOptions.colorWeight.y(), compressionOptions.colorWeight.z());
int flags = 0;
if (m_alphaMode == AlphaMode_Transparency)
{
flags = nvsquish::kWeightColourByAlpha;
}
for (uint y = 0; y < h; y += 4) {
for (uint x = 0; x < w; x += 4) {
@ -307,7 +313,7 @@ void nv::SlowCompressor::compressDXT3(const CompressionOptions::Private & compre
}
else
{
nvsquish::ColourSet colours((uint8 *)rgba.colors(), nvsquish::kWeightColourByAlpha);
nvsquish::ColourSet colours((uint8 *)rgba.colors(), flags);
fit.SetColourSet(&colours, 0);
fit.Compress(&block.color);
}
@ -330,6 +336,12 @@ void nv::SlowCompressor::compressDXT5(const CompressionOptions::Private & compre
nvsquish::WeightedClusterFit fit;
fit.SetMetric(compressionOptions.colorWeight.x(), compressionOptions.colorWeight.y(), compressionOptions.colorWeight.z());
int flags = 0;
if (m_alphaMode == AlphaMode_Transparency)
{
flags = nvsquish::kWeightColourByAlpha;
}
for (uint y = 0; y < h; y += 4) {
for (uint x = 0; x < w; x += 4) {
@ -352,7 +364,7 @@ void nv::SlowCompressor::compressDXT5(const CompressionOptions::Private & compre
}
else
{
nvsquish::ColourSet colours((uint8 *)rgba.colors(), nvsquish::kWeightColourByAlpha);
nvsquish::ColourSet colours((uint8 *)rgba.colors(), flags);
fit.SetColourSet(&colours, 0);
fit.Compress(&block.color);
}
@ -402,7 +414,7 @@ void nv::SlowCompressor::compressDXT5n(const CompressionOptions::Private & compr
}
else*/
{
nvsquish::ColourSet colours((uint8 *)rgba.colors(), nvsquish::kWeightColourByAlpha);
nvsquish::ColourSet colours((uint8 *)rgba.colors(), 0);
fit.SetColourSet(&colours, 0);
fit.Compress(&block.color);
}