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_FONT_RENDERER_H 18 #define ANDROID_HWUI_FONT_RENDERER_H 19 20 #include <utils/LruCache.h> 21 #include <utils/Vector.h> 22 23 #include <SkPaint.h> 24 25 #include <GLES2/gl2.h> 26 27 #include "font/FontUtil.h" 28 #include "font/CacheTexture.h" 29 #include "font/CachedGlyphInfo.h" 30 #include "font/Font.h" 31 #include "utils/SortedList.h" 32 #include "Matrix.h" 33 #include "Properties.h" 34 35 namespace RSC { 36 class Element; 37 class RS; 38 class ScriptIntrinsicBlur; 39 } 40 41 class Functor; 42 43 namespace android { 44 namespace uirenderer { 45 46 /////////////////////////////////////////////////////////////////////////////// 47 // Renderer 48 /////////////////////////////////////////////////////////////////////////////// 49 50 class FontRenderer { 51 public: 52 FontRenderer(); 53 ~FontRenderer(); 54 55 void flushLargeCaches(); 56 57 void setGammaTable(const uint8_t* gammaTable) { 58 mGammaTable = gammaTable; 59 } 60 61 void setFont(SkPaint* paint, const mat4& matrix); 62 63 void precache(SkPaint* paint, const char* text, int numGlyphs, const mat4& matrix); 64 void endPrecaching(); 65 66 // bounds is an out parameter 67 bool renderPosText(SkPaint* paint, const Rect* clip, const char *text, uint32_t startIndex, 68 uint32_t len, int numGlyphs, int x, int y, const float* positions, Rect* bounds, 69 Functor* functor, bool forceFinish = true); 70 71 // bounds is an out parameter 72 bool renderTextOnPath(SkPaint* paint, const Rect* clip, const char *text, uint32_t startIndex, 73 uint32_t len, int numGlyphs, SkPath* path, float hOffset, float vOffset, Rect* bounds); 74 75 struct DropShadow { 76 DropShadow() { }; 77 78 DropShadow(const DropShadow& dropShadow): 79 width(dropShadow.width), height(dropShadow.height), 80 image(dropShadow.image), penX(dropShadow.penX), 81 penY(dropShadow.penY) { 82 } 83 84 uint32_t width; 85 uint32_t height; 86 uint8_t* image; 87 int32_t penX; 88 int32_t penY; 89 }; 90 91 // After renderDropShadow returns, the called owns the memory in DropShadow.image 92 // and is responsible for releasing it when it's done with it 93 DropShadow renderDropShadow(SkPaint* paint, const char *text, uint32_t startIndex, 94 uint32_t len, int numGlyphs, uint32_t radius, const float* positions); 95 96 void setTextureFiltering(bool linearFiltering) { 97 mLinearFiltering = linearFiltering; 98 } 99 100 uint32_t getCacheSize() const; 101 102 private: 103 friend class Font; 104 105 static const uint32_t gMaxNumberOfQuads = 2048; 106 107 const uint8_t* mGammaTable; 108 109 void allocateTextureMemory(CacheTexture* cacheTexture); 110 void deallocateTextureMemory(CacheTexture* cacheTexture); 111 void initTextTexture(); 112 CacheTexture* createCacheTexture(int width, int height, bool allocate); 113 void cacheBitmap(const SkGlyph& glyph, CachedGlyphInfo* cachedGlyph, 114 uint32_t *retOriginX, uint32_t *retOriginY, bool precaching); 115 CacheTexture* cacheBitmapInTexture(const SkGlyph& glyph, uint32_t* startX, uint32_t* startY); 116 117 void flushAllAndInvalidate(); 118 void initVertexArrayBuffers(); 119 120 void checkInit(); 121 void initRender(const Rect* clip, Rect* bounds, Functor* functor); 122 void finishRender(); 123 124 void issueDrawCommand(); 125 void appendMeshQuadNoClip(float x1, float y1, float u1, float v1, 126 float x2, float y2, float u2, float v2, 127 float x3, float y3, float u3, float v3, 128 float x4, float y4, float u4, float v4, CacheTexture* texture); 129 void appendMeshQuad(float x1, float y1, float u1, float v1, 130 float x2, float y2, float u2, float v2, 131 float x3, float y3, float u3, float v3, 132 float x4, float y4, float u4, float v4, CacheTexture* texture); 133 void appendRotatedMeshQuad(float x1, float y1, float u1, float v1, 134 float x2, float y2, float u2, float v2, 135 float x3, float y3, float u3, float v3, 136 float x4, float y4, float u4, float v4, CacheTexture* texture); 137 138 void removeFont(const Font* font); 139 140 void checkTextureUpdate(); 141 142 void setTextureDirty() { 143 mUploadTexture = true; 144 } 145 146 uint32_t mSmallCacheWidth; 147 uint32_t mSmallCacheHeight; 148 uint32_t mLargeCacheWidth; 149 uint32_t mLargeCacheHeight; 150 151 Vector<CacheTexture*> mCacheTextures; 152 153 Font* mCurrentFont; 154 LruCache<Font::FontDescription, Font*> mActiveFonts; 155 156 CacheTexture* mCurrentCacheTexture; 157 158 bool mUploadTexture; 159 160 uint32_t mIndexBufferID; 161 162 Functor* mFunctor; 163 const Rect* mClip; 164 Rect* mBounds; 165 bool mDrawn; 166 167 bool mInitialized; 168 169 bool mLinearFiltering; 170 171 // RS constructs 172 sp<RSC::RS> mRs; 173 sp<const RSC::Element> mRsElement; 174 sp<RSC::ScriptIntrinsicBlur> mRsScript; 175 176 static void computeGaussianWeights(float* weights, int32_t radius); 177 static void horizontalBlur(float* weights, int32_t radius, const uint8_t *source, uint8_t *dest, 178 int32_t width, int32_t height); 179 static void verticalBlur(float* weights, int32_t radius, const uint8_t *source, uint8_t *dest, 180 int32_t width, int32_t height); 181 182 // the input image handle may have its pointer replaced (to avoid copies) 183 void blurImage(uint8_t** image, int32_t width, int32_t height, int32_t radius); 184 }; 185 186 }; // namespace uirenderer 187 }; // namespace android 188 189 #endif // ANDROID_HWUI_FONT_RENDERER_H 190
