Enable weighted cluster fit compressor by default.

src/nvtt/CompressDXT.cpp

@@ -205,9 +205,9 @@ void nv::SlowCompressor::compressDXT1(const CompressionOptions::Private & compre
 	ColorBlock rgba;
 	BlockDXT1 block;
 
-	//squish::WeightedClusterFit fit;
+	squish::WeightedClusterFit fit;
 	//squish::ClusterFit fit;
-	squish::FastClusterFit fit;
+	//squish::FastClusterFit fit;
 	fit.SetMetric(compressionOptions.colorWeight.x(), compressionOptions.colorWeight.y(), compressionOptions.colorWeight.z());
 
 	for (uint y = 0; y < h; y += 4) {
@@ -221,7 +221,7 @@ void nv::SlowCompressor::compressDXT1(const CompressionOptions::Private & compre
 			}
 			else
 			{
-				squish::ColourSet colours((uint8 *)rgba.colors(), 0);
+				squish::ColourSet colours((uint8 *)rgba.colors(), 0, true);
 				fit.SetColourSet(&colours, squish::kDxt1);
 				fit.Compress(&block);
 			}

src/nvtt/squish/weightedclusterfit.cpp

@@ -131,6 +131,7 @@ float WeightedClusterFit::GetBestError() const
 
 void WeightedClusterFit::Compress3( void* block )
 {
+	int const count = m_colours->GetCount();
 	Vec4 const one = VEC4_CONST(1.0f);
 	Vec4 const zero = VEC4_CONST(0.0f);
 	Vec4 const half(0.5f, 0.5f, 0.5f, 0.25f);
@@ -146,11 +147,11 @@ void WeightedClusterFit::Compress3( void* block )
 	int b0 = 0, b1 = 0;
 
 	// check all possible clusters for this total order
-	for( int c0 = 0; c0 <= 16; c0++)
+	for( int c0 = 0; c0 <= count; c0++)
 	{	
 		Vec4 x1 = zero;
 		
-		for( int c1 = 0; c1 <= 16-c0; c1++)
+		for( int c1 = 0; c1 <= count-c0; c1++)
 		{
 			Vec4 const x2 = m_xsum - x1 - x0;
 			
@@ -228,7 +229,7 @@ void WeightedClusterFit::Compress3( void* block )
 		
 		// remap the indices
 		u8 ordered[16];
-		for( int i = 0; i < 16; ++i )
+		for( int i = 0; i < count; ++i )
 			ordered[m_order[i]] = bestindices[i];
 		
 		m_colours->RemapIndices( ordered, bestindices ); // Set alpha indices.
@@ -244,6 +245,7 @@ void WeightedClusterFit::Compress3( void* block )
 
 void WeightedClusterFit::Compress4( void* block )
 {
+	int const count = m_colours->GetCount();
 	Vec4 const one = VEC4_CONST(1.0f);
 	Vec4 const zero = VEC4_CONST(0.0f);
 	Vec4 const half = VEC4_CONST(0.5f);
@@ -260,15 +262,15 @@ void WeightedClusterFit::Compress4( void* block )
 	int b0 = 0, b1 = 0, b2 = 0;
 
 	// check all possible clusters for this total order
-	for( int c0 = 0; c0 <= 16; c0++)
+	for( int c0 = 0; c0 <= count; c0++)
 	{	
 		Vec4 x1 = zero;
 		
-		for( int c1 = 0; c1 <= 16-c0; c1++)
+		for( int c1 = 0; c1 <= count-c0; c1++)
 		{	
 			Vec4 x2 = zero;
 			
-			for( int c2 = 0; c2 <= 16-c0-c1; c2++)
+			for( int c2 = 0; c2 <= count-c0-c1; c2++)
 			{
 				Vec4 const x3 = m_xsum - x2 - x1 - x0;
 				
@@ -353,7 +355,7 @@ void WeightedClusterFit::Compress4( void* block )
 		
 		// remap the indices
 		u8 ordered[16];
-		for( int i = 0; i < 16; ++i )
+		for( int i = 0; i < count; ++i )
 			ordered[m_order[i]] = bestindices[i];
 		
 		// save the block

src/nvtt/tools/compress.cpp

@@ -424,7 +424,7 @@ int main(int argc, char *argv[])
 	else
 	{
 		printf("DISABLED\n\n");
-	}	
+	}
 	
 	outputHandler.setTotal(compressor.estimateSize(inputOptions, compressionOptions));
 	outputHandler.setDisplayProgress(!silent);