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97 lines
2.6 KiB
C++
97 lines
2.6 KiB
C++
/*
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* Copyright 2015 The Etc2Comp Authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include "EtcBlock4x4Encoding_ETC1.h"
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namespace Etc
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{
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class Block4x4Encoding_RGB8 : public Block4x4Encoding_ETC1
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{
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public:
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Block4x4Encoding_RGB8(void);
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virtual ~Block4x4Encoding_RGB8(void);
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virtual void InitFromEncodingBits(Block4x4 *a_pblockParent,
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unsigned char *a_paucEncodingBits,
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ColorFloatRGBA *a_pafrgbaSource,
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ErrorMetric a_errormetric);
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virtual void PerformIteration(float a_fEffort);
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virtual void SetEncodingBits(void);
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inline ColorFloatRGBA GetColor3(void) const
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{
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return m_frgbaColor3;
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}
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protected:
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static const unsigned int PLANAR_CORNER_COLORS = 3;
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static const unsigned int MAX_PLANAR_REGRESSION_SIZE = 4;
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static const unsigned int TH_DISTANCES = 8;
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static float s_afTHDistanceTable[TH_DISTANCES];
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void TryPlanar(unsigned int a_uiRadius);
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void TryTAndH(unsigned int a_uiRadius);
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void InitFromEncodingBits_Planar(void);
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ColorFloatRGBA m_frgbaColor3; // used for planar
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void SetEncodingBits_T(void);
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void SetEncodingBits_H(void);
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void SetEncodingBits_Planar(void);
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// state shared between iterations
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ColorFloatRGBA m_frgbaOriginalColor1_TAndH;
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ColorFloatRGBA m_frgbaOriginalColor2_TAndH;
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void CalculateBaseColorsForTAndH(void);
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void TryT(unsigned int a_uiRadius);
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void TryT_BestSelectorCombination(void);
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void TryH(unsigned int a_uiRadius);
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void TryH_BestSelectorCombination(void);
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private:
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void InitFromEncodingBits_T(void);
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void InitFromEncodingBits_H(void);
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void CalculatePlanarCornerColors(void);
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void ColorRegression(ColorFloatRGBA *a_pafrgbaPixels, unsigned int a_uiPixels,
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ColorFloatRGBA *a_pfrgbaSlope, ColorFloatRGBA *a_pfrgbaOffset);
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bool TwiddlePlanar(void);
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bool TwiddlePlanarR();
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bool TwiddlePlanarG();
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bool TwiddlePlanarB();
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void DecodePixels_T(void);
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void DecodePixels_H(void);
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void DecodePixels_Planar(void);
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};
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} // namespace Etc
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