1 /* 2 * Copyright 2010 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #ifndef GrFontScaler_DEFINED 9 #define GrFontScaler_DEFINED 10 11 #include "GrGlyph.h" 12 #include "GrKey.h" 13 14 class SkPath; 15 16 /** 17 * This is a virtual base class which Gr's interface to the host platform's 18 * font scaler. 19 * 20 * The client is responsible for subclassing, and instantiating this. The 21 * instance is created for a specific font+size+matrix. 22 */ 23 class GrFontScaler : public SkRefCnt { 24 public: 25 SK_DECLARE_INST_COUNT(GrFontScaler) 26 27 virtual const GrKey* getKey() = 0; 28 virtual GrMaskFormat getMaskFormat() = 0; 29 virtual bool getPackedGlyphBounds(GrGlyph::PackedID, SkIRect* bounds) = 0; 30 virtual bool getPackedGlyphImage(GrGlyph::PackedID, int width, int height, 31 int rowBytes, void* image) = 0; 32 // get bounds for distance field associated with packed ID 33 virtual bool getPackedGlyphDFBounds(GrGlyph::PackedID, SkIRect* bounds) = 0; 34 // copies distance field bytes into pre-allocated dfImage 35 // (should be width*height bytes in size) 36 virtual bool getPackedGlyphDFImage(GrGlyph::PackedID, int width, int height, 37 void* dfImage) = 0; 38 virtual bool getGlyphPath(uint16_t glyphID, SkPath*) = 0; 39 40 private: 41 typedef SkRefCnt INHERITED; 42 }; 43 44 #endif 45
