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comparison: gfx/skia/trunk/src/core/SkDrawProcs.h
gfx/skia/trunk/src/core/SkDrawProcs.h
- branch
- TOR_BUG_3246
- changeset 5
- 4ab42b5ab56c
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| -1:000000000000 | 0:84f568d97c7c |
|---|---|
| 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 bool SkDrawTreatAAStrokeAsHairline(SkScalar strokeWidth, const SkMatrix&, | |
| 63 SkScalar* coverage); | |
| 64 | |
| 65 /** | |
| 66 * If the current paint is set to stroke and the stroke-width when applied to | |
| 67 * the matrix is <= 1.0, then this returns true, and sets coverage (simulating | |
| 68 * a stroke by drawing a hairline with partial coverage). If any of these | |
| 69 * conditions are false, then this returns false and coverage is ignored. | |
| 70 */ | |
| 71 inline bool SkDrawTreatAsHairline(const SkPaint& paint, const SkMatrix& matrix, | |
| 72 SkScalar* coverage) { | |
| 73 if (SkPaint::kStroke_Style != paint.getStyle()) { | |
| 74 return false; | |
| 75 } | |
| 76 | |
| 77 SkScalar strokeWidth = paint.getStrokeWidth(); | |
| 78 if (0 == strokeWidth) { | |
| 79 *coverage = SK_Scalar1; | |
| 80 return true; | |
| 81 } | |
| 82 | |
| 83 if (!paint.isAntiAlias()) { | |
| 84 return false; | |
| 85 } | |
| 86 | |
| 87 return SkDrawTreatAAStrokeAsHairline(strokeWidth, matrix, coverage); | |
| 88 } | |
| 89 | |
| 90 #endif |
