1 /* 2 * Copyright 2015 The Etc2Comp Authors. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #pragma once 18 19 #include "EtcBlock4x4Encoding_RGB8.h" 20 21 namespace Etc 22 { 23 class Block4x4EncodingBits_R11; 24 25 // ################################################################################ 26 // Block4x4Encoding_R11 27 // ################################################################################ 28 29 class Block4x4Encoding_R11 : public Block4x4Encoding_RGB8 30 { 31 public: 32 33 Block4x4Encoding_R11(void); 34 virtual ~Block4x4Encoding_R11(void); 35 36 virtual void InitFromSource(Block4x4 *a_pblockParent, 37 ColorFloatRGBA *a_pafrgbaSource, 38 unsigned char *a_paucEncodingBits, ErrorMetric a_errormetric); 39 40 virtual void InitFromEncodingBits(Block4x4 *a_pblockParent, 41 unsigned char *a_paucEncodingBits, 42 ColorFloatRGBA *a_pafrgbaSource, 43 ErrorMetric a_errormetric); 44 45 virtual void PerformIteration(float a_fEffort); 46 47 virtual void SetEncodingBits(void); 48 GetRedBase(void)49 inline float GetRedBase(void) const 50 { 51 return m_fRedBase; 52 } 53 GetRedMultiplier(void)54 inline float GetRedMultiplier(void) const 55 { 56 return m_fRedMultiplier; 57 } 58 GetRedTableIndex(void)59 inline int GetRedTableIndex(void) const 60 { 61 return m_uiRedModifierTableIndex; 62 } 63 GetRedSelectors(void)64 inline const unsigned int * GetRedSelectors(void) const 65 { 66 return m_auiRedSelectors; 67 } 68 69 protected: 70 71 static const unsigned int MODIFIER_TABLE_ENTRYS = 16; 72 static const unsigned int SELECTOR_BITS = 3; 73 static const unsigned int SELECTORS = 1 << SELECTOR_BITS; 74 75 static float s_aafModifierTable[MODIFIER_TABLE_ENTRYS][SELECTORS]; 76 77 void CalculateR11(unsigned int a_uiSelectorsUsed, 78 float a_fBaseRadius, float a_fMultiplierRadius); 79 80 81 82 DecodePixelRed(float a_fBase,float a_fMultiplier,unsigned int a_uiTableIndex,unsigned int a_uiSelector)83 inline float DecodePixelRed(float a_fBase, float a_fMultiplier, 84 unsigned int a_uiTableIndex, unsigned int a_uiSelector) 85 { 86 float fMultiplier = a_fMultiplier; 87 if (fMultiplier <= 0.0f) 88 { 89 fMultiplier = 1.0f / 8.0f; 90 } 91 92 float fPixelRed = a_fBase * 8 + 4 + 93 8 * fMultiplier*s_aafModifierTable[a_uiTableIndex][a_uiSelector]*255; 94 fPixelRed /= 2047.0f; 95 96 if (fPixelRed < 0.0f) 97 { 98 fPixelRed = 0.0f; 99 } 100 else if (fPixelRed > 1.0f) 101 { 102 fPixelRed = 1.0f; 103 } 104 105 return fPixelRed; 106 } 107 108 Block4x4EncodingBits_R11 *m_pencodingbitsR11; 109 110 float m_fRedBase; 111 float m_fRedMultiplier; 112 float m_fRedBlockError; 113 unsigned int m_uiRedModifierTableIndex; 114 unsigned int m_auiRedSelectors[PIXELS]; 115 116 117 }; 118 119 // ---------------------------------------------------------------------------------------------------- 120 // 121 122 } // namespace Etc 123