1 files changed, 51 insertions, 0 deletions
diff --git a/thirdparty/cvtt/ConvectionKernels_S3TC.h b/thirdparty/cvtt/ConvectionKernels_S3TC.h
new file mode 100644
index 0000000000..aa197229c2
--- /dev/null
+++ b/thirdparty/cvtt/ConvectionKernels_S3TC.h
@@ -0,0 +1,51 @@
+#pragma once
+#ifndef __CVTT_S3TC_H__
+#define __CVTT_S3TC_H__
+
+#include "ConvectionKernels_ParallelMath.h"
+
+namespace cvtt
+{
+    namespace Internal
+    {
+        template<int TVectorSize>
+        class EndpointRefiner;
+    }
+
+    struct PixelBlockU8;
+}
+
+namespace cvtt
+{
+    namespace Internal
+    {
+        class S3TCComputer
+        {
+        public:
+            typedef ParallelMath::Float MFloat;
+            typedef ParallelMath::SInt16 MSInt16;
+            typedef ParallelMath::UInt15 MUInt15;
+            typedef ParallelMath::UInt16 MUInt16;
+            typedef ParallelMath::SInt32 MSInt32;
+
+            static void Init(MFloat& error);
+            static void QuantizeTo6Bits(MUInt15& v);
+            static void QuantizeTo5Bits(MUInt15& v);
+            static void QuantizeTo565(MUInt15 endPoint[3]);
+            static MFloat ParanoidFactorForSpan(const MSInt16& span);
+            static MFloat ParanoidDiff(const MUInt15& a, const MUInt15& b, const MFloat& d);
+            static void TestSingleColor(uint32_t flags, const MUInt15 pixels[16][4], const MFloat floatPixels[16][4], int range, const float* channelWeights,
+                MFloat &bestError, MUInt15 bestEndpoints[2][3], MUInt15 bestIndexes[16], MUInt15 &bestRange, const ParallelMath::RoundTowardNearestForScope *rtn);
+            static void TestEndpoints(uint32_t flags, const MUInt15 pixels[16][4], const MFloat floatPixels[16][4], const MFloat preWeightedPixels[16][4], const MUInt15 unquantizedEndPoints[2][3], int range, const float* channelWeights,
+                MFloat &bestError, MUInt15 bestEndpoints[2][3], MUInt15 bestIndexes[16], MUInt15 &bestRange, EndpointRefiner<3> *refiner, const ParallelMath::RoundTowardNearestForScope *rtn);
+            static void TestCounts(uint32_t flags, const int *counts, int nCounts, const MUInt15 &numElements, const MUInt15 pixels[16][4], const MFloat floatPixels[16][4], const MFloat preWeightedPixels[16][4], bool alphaTest,
+                const MFloat floatSortedInputs[16][4], const MFloat preWeightedFloatSortedInputs[16][4], const float *channelWeights, MFloat &bestError, MUInt15 bestEndpoints[2][3], MUInt15 bestIndexes[16], MUInt15 &bestRange,
+                const ParallelMath::RoundTowardNearestForScope* rtn);
+            static void PackExplicitAlpha(uint32_t flags, const PixelBlockU8* inputs, int inputChannel, uint8_t* packedBlocks, size_t packedBlockStride);
+            static void PackInterpolatedAlpha(uint32_t flags, const PixelBlockU8* inputs, int inputChannel, uint8_t* packedBlocks, size_t packedBlockStride, bool isSigned, int maxTweakRounds, int numRefineRounds);
+            static void PackRGB(uint32_t flags, const PixelBlockU8* inputs, uint8_t* packedBlocks, size_t packedBlockStride, const float channelWeights[4], bool alphaTest, float alphaThreshold, bool exhaustive, int maxTweakRounds, int numRefineRounds);
+        };
+    }
+}
+
+#endif