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godotengine
GitHub Repository: godotengine/godot
 Path: blob/master/thirdparty/cvtt/ConvectionKernels_S3TC.h
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#pragma once

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#ifndef __CVTT_S3TC_H__

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#define __CVTT_S3TC_H__

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#include "ConvectionKernels_ParallelMath.h"

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namespace cvtt

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{

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    namespace Internal

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    {

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        template<int TVectorSize>

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        class EndpointRefiner;

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    }

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    struct PixelBlockU8;

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}

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namespace cvtt

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{

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    namespace Internal

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    {

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        class S3TCComputer

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        {

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        public:

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            typedef ParallelMath::Float MFloat;

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            typedef ParallelMath::SInt16 MSInt16;

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            typedef ParallelMath::UInt15 MUInt15;

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            typedef ParallelMath::UInt16 MUInt16;

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            typedef ParallelMath::SInt32 MSInt32;

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            static void Init(MFloat& error);

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            static void QuantizeTo6Bits(MUInt15& v);

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            static void QuantizeTo5Bits(MUInt15& v);

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            static void QuantizeTo565(MUInt15 endPoint[3]);

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            static MFloat ParanoidFactorForSpan(const MSInt16& span);

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            static MFloat ParanoidDiff(const MUInt15& a, const MUInt15& b, const MFloat& d);

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            static void TestSingleColor(uint32_t flags, const MUInt15 pixels[16][4], const MFloat floatPixels[16][4], int range, const float* channelWeights,

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                MFloat &bestError, MUInt15 bestEndpoints[2][3], MUInt15 bestIndexes[16], MUInt15 &bestRange, const ParallelMath::RoundTowardNearestForScope *rtn);

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            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,

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                MFloat &bestError, MUInt15 bestEndpoints[2][3], MUInt15 bestIndexes[16], MUInt15 &bestRange, EndpointRefiner<3> *refiner, const ParallelMath::RoundTowardNearestForScope *rtn);

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            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,

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                const MFloat floatSortedInputs[16][4], const MFloat preWeightedFloatSortedInputs[16][4], const float *channelWeights, MFloat &bestError, MUInt15 bestEndpoints[2][3], MUInt15 bestIndexes[16], MUInt15 &bestRange,

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                const ParallelMath::RoundTowardNearestForScope* rtn);

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            static void PackExplicitAlpha(uint32_t flags, const PixelBlockU8* inputs, int inputChannel, uint8_t* packedBlocks, size_t packedBlockStride);

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            static void PackInterpolatedAlpha(uint32_t flags, const PixelBlockU8* inputs, int inputChannel, uint8_t* packedBlocks, size_t packedBlockStride, bool isSigned, int maxTweakRounds, int numRefineRounds);

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            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);

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        };

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    }

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}

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#endif

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