1 2 /* 3 * Copyright 2010 Google Inc. 4 * 5 * Use of this source code is governed by a BSD-style license that can be 6 * found in the LICENSE file. 7 */ 8 9 10 11 #ifndef GrGlyph_DEFINED 12 #define GrGlyph_DEFINED 13 14 #include "GrPath.h" 15 #include "GrRect.h" 16 17 class GrAtlas; 18 19 /* Need this to be quad-state: 20 - complete w/ image 21 - just metrics 22 - failed to get image, but has metrics 23 - failed to get metrics 24 */ 25 struct GrGlyph { 26 typedef uint32_t PackedID; 27 28 GrAtlas* fAtlas; 29 GrPath* fPath; 30 PackedID fPackedID; 31 GrIRect16 fBounds; 32 GrIPoint16 fAtlasLocation; 33 34 void init(GrGlyph::PackedID packed, const GrIRect& bounds) { 35 fAtlas = NULL; 36 fPath = NULL; 37 fPackedID = packed; 38 fBounds.set(bounds); 39 fAtlasLocation.set(0, 0); 40 } 41 42 void free() { 43 if (fPath) { 44 delete fPath; 45 fPath = NULL; 46 } 47 } 48 49 int width() const { return fBounds.width(); } 50 int height() const { return fBounds.height(); } 51 bool isEmpty() const { return fBounds.isEmpty(); } 52 uint16_t glyphID() const { return UnpackID(fPackedID); } 53 54 /////////////////////////////////////////////////////////////////////////// 55 56 static inline unsigned ExtractSubPixelBitsFromFixed(GrFixed pos) { 57 // two most significant fraction bits from fixed-point 58 return (pos >> 14) & 3; 59 } 60 61 static inline PackedID Pack(uint16_t glyphID, GrFixed x, GrFixed y) { 62 x = ExtractSubPixelBitsFromFixed(x); 63 y = ExtractSubPixelBitsFromFixed(y); 64 return (x << 18) | (y << 16) | glyphID; 65 } 66 67 static inline GrFixed UnpackFixedX(PackedID packed) { 68 return ((packed >> 18) & 3) << 14; 69 } 70 71 static inline GrFixed UnpackFixedY(PackedID packed) { 72 return ((packed >> 16) & 3) << 14; 73 } 74 75 static inline uint16_t UnpackID(PackedID packed) { 76 return (uint16_t)packed; 77 } 78 }; 79 80 81 #endif 82 83
