123 lines
3 KiB
C++
123 lines
3 KiB
C++
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/*
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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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namespace Etc
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{
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class Block4x4EncodingBits_R11;
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// ################################################################################
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// Block4x4Encoding_R11
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// ################################################################################
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class Block4x4Encoding_R11 : public Block4x4Encoding_RGB8
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{
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public:
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Block4x4Encoding_R11(void);
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virtual ~Block4x4Encoding_R11(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, 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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inline float GetRedBase(void) const
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{
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return m_fRedBase;
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}
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inline float GetRedMultiplier(void) const
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{
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return m_fRedMultiplier;
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}
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inline int GetRedTableIndex(void) const
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{
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return m_uiRedModifierTableIndex;
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}
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inline const unsigned int * GetRedSelectors(void) const
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{
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return m_auiRedSelectors;
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}
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protected:
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static const unsigned int MODIFIER_TABLE_ENTRYS = 16;
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static const unsigned int SELECTOR_BITS = 3;
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static const unsigned int SELECTORS = 1 << SELECTOR_BITS;
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static float s_aafModifierTable[MODIFIER_TABLE_ENTRYS][SELECTORS];
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void CalculateR11(unsigned int a_uiSelectorsUsed,
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float a_fBaseRadius, float a_fMultiplierRadius);
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inline float DecodePixelRed(float a_fBase, float a_fMultiplier,
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unsigned int a_uiTableIndex, unsigned int a_uiSelector)
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{
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float fMultiplier = a_fMultiplier;
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if (fMultiplier <= 0.0f)
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{
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fMultiplier = 1.0f / 8.0f;
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}
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float fPixelRed = a_fBase * 8 + 4 +
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8 * fMultiplier*s_aafModifierTable[a_uiTableIndex][a_uiSelector]*255;
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fPixelRed /= 2047.0f;
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if (fPixelRed < 0.0f)
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{
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fPixelRed = 0.0f;
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}
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else if (fPixelRed > 1.0f)
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{
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fPixelRed = 1.0f;
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}
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return fPixelRed;
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}
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Block4x4EncodingBits_R11 *m_pencodingbitsR11;
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float m_fRedBase;
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float m_fRedMultiplier;
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float m_fRedBlockError;
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unsigned int m_uiRedModifierTableIndex;
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unsigned int m_auiRedSelectors[PIXELS];
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};
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// ----------------------------------------------------------------------------------------------------
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//
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} // namespace Etc
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