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