1 /* 2 * Copyright (C) 2009 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_RS_FONT_H 18 #define ANDROID_RS_FONT_H 19 20 #include "RenderScript.h" 21 #include "rsStream.h" 22 #include <utils/String8.h> 23 #include <utils/Vector.h> 24 #include <utils/KeyedVector.h> 25 26 struct FT_LibraryRec_; 27 struct FT_FaceRec_; 28 struct FT_Bitmap_; 29 30 // --------------------------------------------------------------------------- 31 namespace android { 32 33 namespace renderscript { 34 35 // Gamma (>= 1.0, <= 10.0) 36 #define PROPERTY_TEXT_GAMMA "ro.text_gamma" 37 #define PROPERTY_TEXT_BLACK_GAMMA_THRESHOLD "ro.text_gamma.black_threshold" 38 #define PROPERTY_TEXT_WHITE_GAMMA_THRESHOLD "ro.text_gamma.white_threshold" 39 40 #define DEFAULT_TEXT_GAMMA 1.4f 41 #define DEFAULT_TEXT_BLACK_GAMMA_THRESHOLD 64 42 #define DEFAULT_TEXT_WHITE_GAMMA_THRESHOLD 192 43 44 class FontState; 45 46 class Font : public ObjectBase { 47 public: 48 enum RenderMode { 49 FRAMEBUFFER, 50 BITMAP, 51 MEASURE, 52 }; 53 54 struct Rect { 55 int32_t left; 56 int32_t top; 57 int32_t right; 58 int32_t bottom; setRect59 void set(int32_t l, int32_t r, int32_t t, int32_t b) { 60 left = l; 61 right = r; 62 top = t; 63 bottom = b; 64 } 65 }; 66 67 ~Font(); 68 69 // Currently files do not get serialized, 70 // but we need to inherit from ObjectBase for ref tracking serialize(OStream * stream)71 virtual void serialize(OStream *stream) const { 72 } getClassId()73 virtual RsA3DClassID getClassId() const { 74 return RS_A3D_CLASS_ID_UNKNOWN; 75 } 76 77 static Font * create(Context *rsc, const char *name, float fontSize, uint32_t dpi, 78 const void *data = NULL, uint32_t dataLen = 0); 79 80 protected: 81 82 friend class FontState; 83 84 // Pointer to the utf data, length of data, where to start, number of glyphs ot read 85 // (each glyph may be longer than a char because we are dealing with utf data) 86 // Last two variables are the initial pen position 87 void renderUTF(const char *text, uint32_t len, int32_t x, int32_t y, 88 uint32_t start, int32_t numGlyphs, 89 RenderMode mode = FRAMEBUFFER, Rect *bounds = NULL, 90 uint8_t *bitmap = NULL, uint32_t bitmapW = 0, uint32_t bitmapH = 0); 91 92 void invalidateTextureCache(); 93 struct CachedGlyphInfo 94 { 95 // Has the cache been invalidated? 96 bool mIsValid; 97 // Location of the cached glyph in the bitmap 98 // in case we need to resize the texture 99 uint32_t mBitmapMinX; 100 uint32_t mBitmapMinY; 101 uint32_t mBitmapWidth; 102 uint32_t mBitmapHeight; 103 // Also cache texture coords for the quad 104 float mBitmapMinU; 105 float mBitmapMinV; 106 float mBitmapMaxU; 107 float mBitmapMaxV; 108 // Minimize how much we call freetype 109 int32_t mGlyphIndex; 110 int32_t mAdvanceX; 111 int32_t mAdvanceY; 112 // Values below contain a glyph's origin in the bitmap 113 int32_t mBitmapLeft; 114 int32_t mBitmapTop; 115 }; 116 117 String8 mFontName; 118 float mFontSize; 119 uint32_t mDpi; 120 121 Font(Context *rsc); 122 bool init(const char *name, float fontSize, uint32_t dpi, const void *data = NULL, uint32_t dataLen = 0); 123 124 virtual void preDestroy() const; 125 FT_FaceRec_ *mFace; 126 bool mInitialized; 127 bool mHasKerning; 128 129 DefaultKeyedVector<uint32_t, CachedGlyphInfo* > mCachedGlyphs; 130 CachedGlyphInfo* getCachedUTFChar(int32_t utfChar); 131 132 CachedGlyphInfo *cacheGlyph(uint32_t glyph); 133 void updateGlyphCache(CachedGlyphInfo *glyph); 134 void measureCachedGlyph(CachedGlyphInfo *glyph, int32_t x, int32_t y, Rect *bounds); 135 void drawCachedGlyph(CachedGlyphInfo *glyph, int32_t x, int32_t y); 136 void drawCachedGlyph(CachedGlyphInfo *glyph, int32_t x, int32_t y, 137 uint8_t *bitmap, uint32_t bitmapW, uint32_t bitmapH); 138 }; 139 140 class FontState { 141 public: 142 FontState(); 143 ~FontState(); 144 145 void init(Context *rsc); 146 void deinit(Context *rsc); 147 148 ObjectBaseRef<Font> mDefault; 149 150 void renderText(const char *text, uint32_t len, int32_t x, int32_t y, 151 uint32_t startIndex = 0, int numGlyphs = -1, 152 Font::RenderMode mode = Font::FRAMEBUFFER, 153 Font::Rect *bounds = NULL, 154 uint8_t *bitmap = NULL, uint32_t bitmapW = 0, uint32_t bitmapH = 0); 155 156 void measureText(const char *text, uint32_t len, Font::Rect *bounds); 157 158 void setFontColor(float r, float g, float b, float a); 159 void getFontColor(float *r, float *g, float *b, float *a) const; 160 161 protected: 162 163 friend class Font; 164 165 struct CacheTextureLine { 166 uint32_t mMaxHeight; 167 uint32_t mMaxWidth; 168 uint32_t mCurrentRow; 169 uint32_t mCurrentCol; 170 bool mDirty; 171 CacheTextureLineCacheTextureLine172 CacheTextureLine(uint32_t maxHeight, uint32_t maxWidth, uint32_t currentRow, uint32_t currentCol) 173 : mMaxHeight(maxHeight), mMaxWidth(maxWidth), mCurrentRow(currentRow), 174 mCurrentCol(currentCol), mDirty(false) { 175 } 176 177 bool fitBitmap(FT_Bitmap_ *bitmap, uint32_t *retOriginX, uint32_t *retOriginY); 178 }; 179 180 Vector<CacheTextureLine*> mCacheLines; 181 uint32_t getRemainingCacheCapacity(); 182 183 void precacheLatin(Font *font); 184 String8 mLatinPrecache; 185 186 Context *mRSC; 187 188 struct { 189 float mFontColor[4]; 190 float mGamma; 191 } mConstants; 192 bool mConstantsDirty; 193 194 float mBlackGamma; 195 float mWhiteGamma; 196 197 float mBlackThreshold; 198 float mWhiteThreshold; 199 200 // Free type library, we only need one copy 201 #ifndef ANDROID_RS_SERIALIZE 202 FT_LibraryRec_ *mLibrary; 203 FT_LibraryRec_ *getLib(); 204 #endif //ANDROID_RS_SERIALIZE 205 Vector<Font*> mActiveFonts; 206 207 // Render state for the font 208 ObjectBaseRef<Allocation> mFontShaderFConstant; 209 ObjectBaseRef<ProgramFragment> mFontShaderF; 210 ObjectBaseRef<Sampler> mFontSampler; 211 ObjectBaseRef<ProgramStore> mFontProgramStore; 212 void initRenderState(); 213 214 // Texture to cache glyph bitmaps 215 ObjectBaseRef<Allocation> mTextTexture; 216 void initTextTexture(); getTextTextureData()217 const uint8_t* getTextTextureData() const { 218 return (uint8_t*)mTextTexture->getPtr(); 219 } 220 221 #ifndef ANDROID_RS_SERIALIZE 222 bool cacheBitmap(FT_Bitmap_ *bitmap, uint32_t *retOriginX, uint32_t *retOriginY); 223 #endif //ANDROID_RS_SERIALIZE getCacheTextureType()224 const Type* getCacheTextureType() { 225 return mTextTexture->getType(); 226 } 227 228 void flushAllAndInvalidate(); 229 230 // Pointer to vertex data to speed up frame to frame work 231 float *mTextMeshPtr; 232 uint32_t mCurrentQuadIndex; 233 uint32_t mMaxNumberOfQuads; 234 235 void initVertexArrayBuffers(); 236 ObjectBaseRef<Mesh> mMesh; 237 238 bool mInitialized; 239 240 void checkInit(); 241 242 void issueDrawCommand(); 243 244 void appendMeshQuad(float x1, float y1, float z1, 245 float u1, float v1, 246 float x2, float y2, float z2, 247 float u2, float v2, 248 float x3, float y3, float z3, 249 float u3, float v3, 250 float x4, float y4, float z4, 251 float u4, float v4); 252 }; 253 254 } 255 } 256 257 #endif 258