FontRenderer.h revision 51769a68a5cb34e9564740c6a854fcb93018789d
1694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy/* 2694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy * Copyright (C) 2010 The Android Open Source Project 3694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy * 4694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy * Licensed under the Apache License, Version 2.0 (the "License"); 5694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy * you may not use this file except in compliance with the License. 6694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy * You may obtain a copy of the License at 7694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy * 8694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy * http://www.apache.org/licenses/LICENSE-2.0 9694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy * 10694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy * Unless required by applicable law or agreed to in writing, software 11694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy * distributed under the License is distributed on an "AS IS" BASIS, 12694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy * See the License for the specific language governing permissions and 14694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy * limitations under the License. 15694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy */ 16694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 17694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy#ifndef ANDROID_UI_FONT_RENDERER_H 18694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy#define ANDROID_UI_FONT_RENDERER_H 19694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 20694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy#include <utils/String8.h> 21694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy#include <utils/Vector.h> 22694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy#include <utils/KeyedVector.h> 23694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 24694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy#include <SkScalerContext.h> 25694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy#include <SkPaint.h> 26694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 27694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy#include <GLES2/gl2.h> 28694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 2909147fbdc8206a0cac78bfe9083e7e15b3c5689cRomain Guy#include "Rect.h" 3051769a68a5cb34e9564740c6a854fcb93018789dRomain Guy#include "Properties.h" 3109147fbdc8206a0cac78bfe9083e7e15b3c5689cRomain Guy 32694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guynamespace android { 33694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guynamespace uirenderer { 34694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 35694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guyclass FontRenderer; 36694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 3751769a68a5cb34e9564740c6a854fcb93018789dRomain Guy/** 3851769a68a5cb34e9564740c6a854fcb93018789dRomain Guy * Represents a font, defined by a Skia font id and a font size. A font is used 3951769a68a5cb34e9564740c6a854fcb93018789dRomain Guy * to generate glyphs and cache them in the FontState. 4051769a68a5cb34e9564740c6a854fcb93018789dRomain Guy */ 41694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guyclass Font { 42694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guypublic: 43694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy ~Font(); 44694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 4551769a68a5cb34e9564740c6a854fcb93018789dRomain Guy /** 4651769a68a5cb34e9564740c6a854fcb93018789dRomain Guy * Renders the specified string of text. 4751769a68a5cb34e9564740c6a854fcb93018789dRomain Guy */ 4851769a68a5cb34e9564740c6a854fcb93018789dRomain Guy void renderUTF(SkPaint* paint, const char *text, uint32_t start, uint32_t len, 49694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy int numGlyphs, int x, int y); 5051769a68a5cb34e9564740c6a854fcb93018789dRomain Guy /** 5151769a68a5cb34e9564740c6a854fcb93018789dRomain Guy * Creates a new font associated with the specified font state. 5251769a68a5cb34e9564740c6a854fcb93018789dRomain Guy */ 53694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy static Font* create(FontRenderer* state, uint32_t fontId, float fontSize); 54694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 55694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guyprotected: 56694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy friend class FontRenderer; 57694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 58694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy struct CachedGlyphInfo { 59694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy // Has the cache been invalidated? 60694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy bool mIsValid; 61694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy // Location of the cached glyph in the bitmap 62694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy // in case we need to resize the texture 63694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy uint32_t mBitmapWidth; 64694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy uint32_t mBitmapHeight; 65694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy // Also cache texture coords for the quad 66694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy float mBitmapMinU; 67694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy float mBitmapMinV; 68694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy float mBitmapMaxU; 69694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy float mBitmapMaxV; 70694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy // Minimize how much we call freetype 71694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy uint32_t mGlyphIndex; 72694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy uint32_t mAdvanceX; 73694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy uint32_t mAdvanceY; 74694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy // Values below contain a glyph's origin in the bitmap 75694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy uint32_t mBitmapLeft; 76694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy uint32_t mBitmapTop; 77694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy }; 78694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 79694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy Font(FontRenderer* state, uint32_t fontId, float fontSize); 80694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 81694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy DefaultKeyedVector<int32_t, CachedGlyphInfo*> mCachedGlyphs; 82694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 83bd0e6aa0ff0bd8b376772c3e23513a6021bdda87Romain Guy void invalidateTextureCache(); 84bd0e6aa0ff0bd8b376772c3e23513a6021bdda87Romain Guy 85694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy CachedGlyphInfo *cacheGlyph(SkPaint* paint, int32_t glyph); 86694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy void updateGlyphCache(SkPaint* paint, const SkGlyph& skiaGlyph, CachedGlyphInfo *glyph); 87694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy void drawCachedGlyph(CachedGlyphInfo *glyph, int x, int y); 88bd0e6aa0ff0bd8b376772c3e23513a6021bdda87Romain Guy 89bd0e6aa0ff0bd8b376772c3e23513a6021bdda87Romain Guy FontRenderer* mState; 90bd0e6aa0ff0bd8b376772c3e23513a6021bdda87Romain Guy uint32_t mFontId; 91bd0e6aa0ff0bd8b376772c3e23513a6021bdda87Romain Guy float mFontSize; 92694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy}; 93694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 94694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guyclass FontRenderer { 95694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guypublic: 96694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy FontRenderer(); 97694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy ~FontRenderer(); 98694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 99694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy void init(); 100694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy void deinit(); 101694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 102694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy void setFont(uint32_t fontId, float fontSize); 10351769a68a5cb34e9564740c6a854fcb93018789dRomain Guy void renderText(SkPaint* paint, const Rect* clip, const char *text, uint32_t startIndex, 10451769a68a5cb34e9564740c6a854fcb93018789dRomain Guy uint32_t len, int numGlyphs, int x, int y); 105694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 106694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy GLuint getTexture() { 107694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy checkInit(); 108694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy return mTextureId; 109694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy } 110694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 111694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guyprotected: 112694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy friend class Font; 113694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 114694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy struct CacheTextureLine { 115694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy uint16_t mMaxHeight; 116694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy uint16_t mMaxWidth; 117694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy uint32_t mCurrentRow; 118694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy uint32_t mCurrentCol; 119694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 12051769a68a5cb34e9564740c6a854fcb93018789dRomain Guy CacheTextureLine(uint16_t maxWidth, uint16_t maxHeight, uint32_t currentRow, 121694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy uint32_t currentCol): 12251769a68a5cb34e9564740c6a854fcb93018789dRomain Guy mMaxHeight(maxHeight), 12351769a68a5cb34e9564740c6a854fcb93018789dRomain Guy mMaxWidth(maxWidth), 12451769a68a5cb34e9564740c6a854fcb93018789dRomain Guy mCurrentRow(currentRow), 12551769a68a5cb34e9564740c6a854fcb93018789dRomain Guy mCurrentCol(currentCol) { 126694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy } 127694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 128694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy bool fitBitmap(const SkGlyph& glyph, uint32_t *retOriginX, uint32_t *retOriginY) { 129694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy if (glyph.fHeight > mMaxHeight) { 130694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy return false; 131694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy } 132694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 133694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy if (mCurrentCol + glyph.fWidth < mMaxWidth) { 134694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy *retOriginX = mCurrentCol; 135694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy *retOriginY = mCurrentRow; 136694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy mCurrentCol += glyph.fWidth; 137694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy return true; 138694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy } 139694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 140694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy return false; 141694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy } 142694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy }; 143694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 144694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy uint32_t getCacheWidth() const { 145694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy return mCacheWidth; 146694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy } 147694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 148694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy uint32_t getCacheHeight() const { 149694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy return mCacheHeight; 150694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy } 151694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 152694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy void initTextTexture(); 153694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy bool cacheBitmap(const SkGlyph& glyph, uint32_t *retOriginX, uint32_t *retOriginY); 154694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 155694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy void flushAllAndInvalidate(); 156694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy void initVertexArrayBuffers(); 157694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 158694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy void checkInit(); 159694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 160694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy void issueDrawCommand(); 161694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy void appendMeshQuad(float x1, float y1, float z1, float u1, float v1, float x2, float y2, 162694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy float z2, float u2, float v2, float x3, float y3, float z3, float u3, float v3, 163694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy float x4, float y4, float z4, float u4, float v4); 164694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 165694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy uint32_t mCacheWidth; 166694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy uint32_t mCacheHeight; 167694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 168694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy Vector<CacheTextureLine*> mCacheLines; 169694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 17009147fbdc8206a0cac78bfe9083e7e15b3c5689cRomain Guy Font* mCurrentFont; 171694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy Vector<Font*> mActiveFonts; 172694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 173694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy // Texture to cache glyph bitmaps 174694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy unsigned char* mTextTexture; 175694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy GLuint mTextureId; 176694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy bool mUploadTexture; 177694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 178694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy // Pointer to vertex data to speed up frame to frame work 179694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy float *mTextMeshPtr; 180694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy uint32_t mCurrentQuadIndex; 181694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy uint32_t mMaxNumberOfQuads; 182694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 183694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy uint32_t mIndexBufferID; 184694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 18509147fbdc8206a0cac78bfe9083e7e15b3c5689cRomain Guy const Rect* mClip; 18609147fbdc8206a0cac78bfe9083e7e15b3c5689cRomain Guy 187694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy bool mInitialized; 188694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy}; 189694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 190694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy}; // namespace uirenderer 191694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy}; // namespace android 192694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 193694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy#endif // ANDROID_UI_FONT_RENDERER_H 194