1 /* 2 * Copyright (C) 2010 The Android Open Source Project 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 #ifndef ANDROID_HWUI_GAMMA_FONT_RENDERER_H 18 #define ANDROID_HWUI_GAMMA_FONT_RENDERER_H 19 20 #include <SkPaint.h> 21 22 #include "FontRenderer.h" 23 #include "Program.h" 24 25 namespace android { 26 namespace uirenderer { 27 28 class GammaFontRenderer { 29 public: 30 virtual ~GammaFontRenderer(); 31 32 virtual void clear() = 0; 33 virtual void flush() = 0; 34 35 virtual FontRenderer& getFontRenderer(const SkPaint* paint) = 0; 36 37 virtual uint32_t getFontRendererCount() const = 0; 38 virtual uint32_t getFontRendererSize(uint32_t fontRenderer) const = 0; 39 40 virtual void describe(ProgramDescription& description, const SkPaint* paint) const = 0; 41 virtual void setupProgram(ProgramDescription& description, Program* program) const = 0; 42 43 static GammaFontRenderer* createRenderer(); 44 45 protected: 46 GammaFontRenderer(); 47 48 int mBlackThreshold; 49 int mWhiteThreshold; 50 51 float mGamma; 52 }; 53 54 class ShaderGammaFontRenderer: public GammaFontRenderer { 55 public: ~ShaderGammaFontRenderer()56 ~ShaderGammaFontRenderer() { 57 delete mRenderer; 58 } 59 clear()60 void clear() { 61 delete mRenderer; 62 mRenderer = NULL; 63 } 64 flush()65 void flush() { 66 if (mRenderer) { 67 mRenderer->flushLargeCaches(); 68 } 69 } 70 getFontRenderer(const SkPaint * paint)71 FontRenderer& getFontRenderer(const SkPaint* paint) { 72 if (!mRenderer) { 73 mRenderer = new FontRenderer; 74 } 75 return *mRenderer; 76 } 77 getFontRendererCount()78 uint32_t getFontRendererCount() const { 79 return 1; 80 } 81 getFontRendererSize(uint32_t fontRenderer)82 uint32_t getFontRendererSize(uint32_t fontRenderer) const { 83 return mRenderer ? mRenderer->getCacheSize() : 0; 84 } 85 86 void describe(ProgramDescription& description, const SkPaint* paint) const; 87 void setupProgram(ProgramDescription& description, Program* program) const; 88 89 private: 90 ShaderGammaFontRenderer(bool multiGamma); 91 92 FontRenderer* mRenderer; 93 bool mMultiGamma; 94 95 friend class GammaFontRenderer; 96 }; 97 98 class LookupGammaFontRenderer: public GammaFontRenderer { 99 public: ~LookupGammaFontRenderer()100 ~LookupGammaFontRenderer() { 101 delete mRenderer; 102 } 103 clear()104 void clear() { 105 delete mRenderer; 106 mRenderer = NULL; 107 } 108 flush()109 void flush() { 110 if (mRenderer) { 111 mRenderer->flushLargeCaches(); 112 } 113 } 114 getFontRenderer(const SkPaint * paint)115 FontRenderer& getFontRenderer(const SkPaint* paint) { 116 if (!mRenderer) { 117 mRenderer = new FontRenderer; 118 mRenderer->setGammaTable(&mGammaTable[0]); 119 } 120 return *mRenderer; 121 } 122 getFontRendererCount()123 uint32_t getFontRendererCount() const { 124 return 1; 125 } 126 getFontRendererSize(uint32_t fontRenderer)127 uint32_t getFontRendererSize(uint32_t fontRenderer) const { 128 return mRenderer ? mRenderer->getCacheSize() : 0; 129 } 130 describe(ProgramDescription & description,const SkPaint * paint)131 void describe(ProgramDescription& description, const SkPaint* paint) const { 132 } 133 setupProgram(ProgramDescription & description,Program * program)134 void setupProgram(ProgramDescription& description, Program* program) const { 135 } 136 137 private: 138 LookupGammaFontRenderer(); 139 140 FontRenderer* mRenderer; 141 uint8_t mGammaTable[256]; 142 143 friend class GammaFontRenderer; 144 }; 145 146 class Lookup3GammaFontRenderer: public GammaFontRenderer { 147 public: 148 ~Lookup3GammaFontRenderer(); 149 150 void clear(); 151 void flush(); 152 153 FontRenderer& getFontRenderer(const SkPaint* paint); 154 getFontRendererCount()155 uint32_t getFontRendererCount() const { 156 return kGammaCount; 157 } 158 getFontRendererSize(uint32_t fontRenderer)159 uint32_t getFontRendererSize(uint32_t fontRenderer) const { 160 if (fontRenderer >= kGammaCount) return 0; 161 162 FontRenderer* renderer = mRenderers[fontRenderer]; 163 if (!renderer) return 0; 164 165 return renderer->getCacheSize(); 166 } 167 describe(ProgramDescription & description,const SkPaint * paint)168 void describe(ProgramDescription& description, const SkPaint* paint) const { 169 } 170 setupProgram(ProgramDescription & description,Program * program)171 void setupProgram(ProgramDescription& description, Program* program) const { 172 } 173 174 private: 175 Lookup3GammaFontRenderer(); 176 177 enum Gamma { 178 kGammaDefault = 0, 179 kGammaBlack = 1, 180 kGammaWhite = 2, 181 kGammaCount = 3 182 }; 183 184 FontRenderer* getRenderer(Gamma gamma); 185 186 uint32_t mRenderersUsageCount[kGammaCount]; 187 FontRenderer* mRenderers[kGammaCount]; 188 189 uint8_t mGammaTable[256 * kGammaCount]; 190 191 friend class GammaFontRenderer; 192 }; 193 194 }; // namespace uirenderer 195 }; // namespace android 196 197 #endif // ANDROID_HWUI_GAMMA_FONT_RENDERER_H 198