FontRenderer.h revision bd0e6aa0ff0bd8b376772c3e23513a6021bdda87
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" 3009147fbdc8206a0cac78bfe9083e7e15b3c5689cRomain Guy 31694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guynamespace android { 32694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guynamespace uirenderer { 33694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 34694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guyclass FontRenderer; 35694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 36694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guyclass Font { 37694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guypublic: 38694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy ~Font(); 39694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 40694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy void renderUTF(SkPaint* paint, const char *text, uint32_t len, uint32_t start, 41694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy int numGlyphs, int x, int y); 42694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 43694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy static Font* create(FontRenderer* state, uint32_t fontId, float fontSize); 44694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 45694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guyprotected: 46694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy friend class FontRenderer; 47694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 48694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy struct CachedGlyphInfo { 49694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy // Has the cache been invalidated? 50694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy bool mIsValid; 51694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy // Location of the cached glyph in the bitmap 52694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy // in case we need to resize the texture 53694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy uint32_t mBitmapWidth; 54694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy uint32_t mBitmapHeight; 55694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy // Also cache texture coords for the quad 56694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy float mBitmapMinU; 57694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy float mBitmapMinV; 58694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy float mBitmapMaxU; 59694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy float mBitmapMaxV; 60694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy // Minimize how much we call freetype 61694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy uint32_t mGlyphIndex; 62694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy uint32_t mAdvanceX; 63694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy uint32_t mAdvanceY; 64694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy // Values below contain a glyph's origin in the bitmap 65694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy uint32_t mBitmapLeft; 66694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy uint32_t mBitmapTop; 67694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy }; 68694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 69694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy Font(FontRenderer* state, uint32_t fontId, float fontSize); 70694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 71694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy DefaultKeyedVector<int32_t, CachedGlyphInfo*> mCachedGlyphs; 72694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 73bd0e6aa0ff0bd8b376772c3e23513a6021bdda87Romain Guy void invalidateTextureCache(); 74bd0e6aa0ff0bd8b376772c3e23513a6021bdda87Romain Guy 75694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy CachedGlyphInfo *cacheGlyph(SkPaint* paint, int32_t glyph); 76694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy void updateGlyphCache(SkPaint* paint, const SkGlyph& skiaGlyph, CachedGlyphInfo *glyph); 77694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy void drawCachedGlyph(CachedGlyphInfo *glyph, int x, int y); 78bd0e6aa0ff0bd8b376772c3e23513a6021bdda87Romain Guy 79bd0e6aa0ff0bd8b376772c3e23513a6021bdda87Romain Guy FontRenderer* mState; 80bd0e6aa0ff0bd8b376772c3e23513a6021bdda87Romain Guy uint32_t mFontId; 81bd0e6aa0ff0bd8b376772c3e23513a6021bdda87Romain Guy float mFontSize; 82694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy}; 83694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 84694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guyclass FontRenderer { 85694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guypublic: 86694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy FontRenderer(); 87694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy ~FontRenderer(); 88694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 89694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy void init(); 90694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy void deinit(); 91694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 92694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy void setFont(uint32_t fontId, float fontSize); 9309147fbdc8206a0cac78bfe9083e7e15b3c5689cRomain Guy void renderText(SkPaint* paint, const Rect* clip, const char *text, uint32_t len, 9409147fbdc8206a0cac78bfe9083e7e15b3c5689cRomain Guy uint32_t startIndex, int numGlyphs, int x, int y); 95694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 96694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy GLuint getTexture() { 97694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy checkInit(); 98694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy return mTextureId; 99694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy } 100694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 101694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guyprotected: 102694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy friend class Font; 103694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 104694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy struct CacheTextureLine { 105694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy uint16_t mMaxHeight; 106694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy uint16_t mMaxWidth; 107694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy uint32_t mCurrentRow; 108694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy uint32_t mCurrentCol; 109694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 110694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy CacheTextureLine(uint16_t maxHeight, uint16_t maxWidth, uint32_t currentRow, 111694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy uint32_t currentCol): 112694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy mMaxHeight(maxHeight), mMaxWidth(maxWidth), mCurrentRow(currentRow), 113694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy mCurrentCol(currentCol) { 114694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy } 115694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 116694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy bool fitBitmap(const SkGlyph& glyph, uint32_t *retOriginX, uint32_t *retOriginY) { 117694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy if (glyph.fHeight > mMaxHeight) { 118694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy return false; 119694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy } 120694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 121694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy if (mCurrentCol + glyph.fWidth < mMaxWidth) { 122694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy *retOriginX = mCurrentCol; 123694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy *retOriginY = mCurrentRow; 124694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy mCurrentCol += glyph.fWidth; 125694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy return true; 126694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy } 127694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 128694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy return false; 129694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy } 130694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy }; 131694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 132694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy uint32_t getCacheWidth() const { 133694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy return mCacheWidth; 134694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy } 135694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 136694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy uint32_t getCacheHeight() const { 137694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy return mCacheHeight; 138694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy } 139694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 140694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy void initTextTexture(); 141694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy bool cacheBitmap(const SkGlyph& glyph, uint32_t *retOriginX, uint32_t *retOriginY); 142694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 143694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy void flushAllAndInvalidate(); 144694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy void initVertexArrayBuffers(); 145694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 146694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy void checkInit(); 147694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 148694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy void issueDrawCommand(); 149694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy void appendMeshQuad(float x1, float y1, float z1, float u1, float v1, float x2, float y2, 150694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy float z2, float u2, float v2, float x3, float y3, float z3, float u3, float v3, 151694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy float x4, float y4, float z4, float u4, float v4); 152694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 153694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy uint32_t mCacheWidth; 154694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy uint32_t mCacheHeight; 155694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 156694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy Vector<CacheTextureLine*> mCacheLines; 157694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 15809147fbdc8206a0cac78bfe9083e7e15b3c5689cRomain Guy Font* mCurrentFont; 159694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy Vector<Font*> mActiveFonts; 160694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 161694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy // Texture to cache glyph bitmaps 162694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy unsigned char* mTextTexture; 163694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy GLuint mTextureId; 164694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy bool mUploadTexture; 165694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 166694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy // Pointer to vertex data to speed up frame to frame work 167694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy float *mTextMeshPtr; 168694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy uint32_t mCurrentQuadIndex; 169694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy uint32_t mMaxNumberOfQuads; 170694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 171694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy uint32_t mIndexBufferID; 172694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 17309147fbdc8206a0cac78bfe9083e7e15b3c5689cRomain Guy const Rect* mClip; 17409147fbdc8206a0cac78bfe9083e7e15b3c5689cRomain Guy 175694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy bool mInitialized; 176694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy}; 177694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 178694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy}; // namespace uirenderer 179694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy}; // namespace android 180694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy 181694b519ac647fe998fd396fe0784cc8e179aadc4Romain Guy#endif // ANDROID_UI_FONT_RENDERER_H 182