1 2 /* 3 * Copyright 2011 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 #ifndef SkDrawProcs_DEFINED 9 #define SkDrawProcs_DEFINED 10 11 #include "SkBlitter.h" 12 #include "SkDraw.h" 13 14 class SkAAClip; 15 class SkBlitter; 16 17 struct SkDraw1Glyph { 18 const SkDraw* fDraw; 19 SkBounder* fBounder; 20 const SkRegion* fClip; 21 const SkAAClip* fAAClip; 22 SkBlitter* fBlitter; 23 SkGlyphCache* fCache; 24 const SkPaint* fPaint; 25 SkIRect fClipBounds; 26 /** Half the sampling frequency of the rasterized glyph in x. */ 27 SkFixed fHalfSampleX; 28 /** Half the sampling frequency of the rasterized glyph in y. */ 29 SkFixed fHalfSampleY; 30 31 /** Draws one glyph. 32 * 33 * The x and y are pre-biased, so implementations may just truncate them. 34 * i.e. half the sampling frequency has been added. 35 * e.g. 1/2 or 1/(2^(SkGlyph::kSubBits+1)) has already been added. 36 * This added bias can be found in fHalfSampleX,Y. 37 */ 38 typedef void (*Proc)(const SkDraw1Glyph&, SkFixed x, SkFixed y, const SkGlyph&); 39 40 Proc init(const SkDraw* draw, SkBlitter* blitter, SkGlyphCache* cache, 41 const SkPaint&); 42 43 // call this instead of fBlitter->blitMask() since this wrapper will handle 44 // the case when the mask is ARGB32_Format 45 // 46 void blitMask(const SkMask& mask, const SkIRect& clip) const { 47 if (SkMask::kARGB32_Format == mask.fFormat) { 48 this->blitMaskAsSprite(mask); 49 } else { 50 fBlitter->blitMask(mask, clip); 51 } 52 } 53 54 // mask must be kARGB32_Format 55 void blitMaskAsSprite(const SkMask& mask) const; 56 }; 57 58 struct SkDrawProcs { 59 SkDraw1Glyph::Proc fD1GProc; 60 }; 61 62 /** 63 * If the current paint is set to stroke and the stroke-width when applied to 64 * the matrix is <= 1.0, then this returns true, and sets coverage (simulating 65 * a stroke by drawing a hairline with partial coverage). If any of these 66 * conditions are false, then this returns false and coverage is ignored. 67 */ 68 bool SkDrawTreatAsHairline(const SkPaint&, const SkMatrix&, SkScalar* coverage); 69 70 #endif 71
