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130 lines
3.8 KiB
C++
130 lines
3.8 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_RGB8.h"
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#include "EtcErrorMetric.h"
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#include "EtcBlock4x4EncodingBits.h"
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namespace Etc
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{
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// ################################################################################
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// Block4x4Encoding_RGB8A1
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// RGB8A1 if not completely opaque or transparent
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// ################################################################################
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class Block4x4Encoding_RGB8A1 : public Block4x4Encoding_RGB8
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{
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public:
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static const unsigned int TRANSPARENT_SELECTOR = 2;
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Block4x4Encoding_RGB8A1(void);
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virtual ~Block4x4Encoding_RGB8A1(void);
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virtual void InitFromSource(Block4x4 *a_pblockParent,
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ColorFloatRGBA *a_pafrgbaSource,
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unsigned char *a_paucEncodingBits,
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ErrorMetric a_errormetric);
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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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void InitFromEncodingBits_ETC1(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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void InitFromEncodingBits_T(void);
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void InitFromEncodingBits_H(void);
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void PerformFirstIteration(void);
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void Decode_ETC1(void);
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void DecodePixels_T(void);
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void DecodePixels_H(void);
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void SetEncodingBits_ETC1(void);
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void SetEncodingBits_T(void);
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void SetEncodingBits_H(void);
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protected:
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bool m_boolOpaque; // all source pixels have alpha >= 0.5
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bool m_boolTransparent; // all source pixels have alpha < 0.5
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bool m_boolPunchThroughPixels; // some source pixels have alpha < 0.5
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static float s_aafCwOpaqueUnsetTable[CW_RANGES][SELECTORS];
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private:
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void TryDifferential(bool a_boolFlip, unsigned int a_uiRadius,
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int a_iGrayOffset1, int a_iGrayOffset2);
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void TryDifferentialHalf(DifferentialTrys::Half *a_phalf);
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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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void TryDegenerates1(void);
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void TryDegenerates2(void);
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void TryDegenerates3(void);
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void TryDegenerates4(void);
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};
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// ################################################################################
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// Block4x4Encoding_RGB8A1_Opaque
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// RGB8A1 if all pixels have alpha==1
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// ################################################################################
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class Block4x4Encoding_RGB8A1_Opaque : public Block4x4Encoding_RGB8A1
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{
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public:
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virtual void PerformIteration(float a_fEffort);
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void PerformFirstIteration(void);
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private:
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};
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// ################################################################################
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// Block4x4Encoding_RGB8A1_Transparent
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// RGB8A1 if all pixels have alpha==0
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// ################################################################################
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class Block4x4Encoding_RGB8A1_Transparent : public Block4x4Encoding_RGB8A1
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{
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public:
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virtual void PerformIteration(float a_fEffort);
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private:
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};
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} // namespace Etc
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