The Tor Browser / file comparison
comparison: gfx/skia/trunk/include/core/SkBounder.h
gfx/skia/trunk/include/core/SkBounder.h
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
equal
deleted
inserted
replaced
| -1:000000000000 | 0:33d86ed61ea7 |
|---|---|
| 1 | |
| 2 /* | |
| 3 * Copyright 2006 The Android Open Source Project | |
| 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 #ifndef SkBounder_DEFINED | |
| 11 #define SkBounder_DEFINED | |
| 12 | |
| 13 #include "SkTypes.h" | |
| 14 #include "SkRefCnt.h" | |
| 15 #include "SkPoint.h" | |
| 16 | |
| 17 struct SkGlyph; | |
| 18 struct SkIRect; | |
| 19 struct SkPoint; | |
| 20 struct SkRect; | |
| 21 class SkPaint; | |
| 22 class SkPath; | |
| 23 class SkRegion; | |
| 24 | |
| 25 /** \class SkBounder | |
| 26 | |
| 27 Base class for intercepting the device bounds of shapes before they are drawn. | |
| 28 Install a subclass of this in your canvas. | |
| 29 */ | |
| 30 class SkBounder : public SkRefCnt { | |
| 31 public: | |
| 32 SK_DECLARE_INST_COUNT(SkBounder) | |
| 33 | |
| 34 SkBounder(); | |
| 35 | |
| 36 /* Call to perform a clip test before calling onIRect. | |
| 37 Returns the result from onIRect. | |
| 38 */ | |
| 39 bool doIRect(const SkIRect&); | |
| 40 bool doIRectGlyph(const SkIRect& , int x, int y, const SkGlyph&); | |
| 41 | |
| 42 protected: | |
| 43 /** Override in your subclass. This is called with the device bounds of an | |
| 44 object (text, geometry, image) just before it is drawn. If your method | |
| 45 returns false, the drawing for that shape is aborted. If your method | |
| 46 returns true, drawing continues. The bounds your method receives have already | |
| 47 been transformed in to device coordinates, and clipped to the current clip. | |
| 48 */ | |
| 49 virtual bool onIRect(const SkIRect&) { | |
| 50 return false; | |
| 51 } | |
| 52 | |
| 53 /** Passed to onIRectGlyph with the information about the current glyph. | |
| 54 LSB and RSB are fixed-point (16.16) coordinates of the start and end | |
| 55 of the glyph's advance | |
| 56 */ | |
| 57 struct GlyphRec { | |
| 58 SkIPoint fLSB; //!< fixed-point left-side-bearing of the glyph | |
| 59 SkIPoint fRSB; //!< fixed-point right-side-bearing of the glyph | |
| 60 uint16_t fGlyphID; | |
| 61 uint16_t fFlags; //!< currently set to 0 | |
| 62 }; | |
| 63 | |
| 64 /** Optionally, override in your subclass to receive the glyph ID when | |
| 65 text drawing supplies the device bounds of the object. | |
| 66 */ | |
| 67 virtual bool onIRectGlyph(const SkIRect& r, const GlyphRec&) { | |
| 68 return onIRect(r); | |
| 69 } | |
| 70 | |
| 71 /** Called after each shape has been drawn. The default implementation does | |
| 72 nothing, but your override could use this notification to signal itself | |
| 73 that the offscreen being rendered into needs to be updated to the screen. | |
| 74 */ | |
| 75 virtual void commit(); | |
| 76 | |
| 77 private: | |
| 78 bool doHairline(const SkPoint&, const SkPoint&, const SkPaint&); | |
| 79 bool doRect(const SkRect&, const SkPaint&); | |
| 80 bool doPath(const SkPath&, const SkPaint&, bool doFill); | |
| 81 void setClip(const SkRegion* clip) { fClip = clip; } | |
| 82 | |
| 83 const SkRegion* fClip; | |
| 84 friend class SkAutoBounderCommit; | |
| 85 friend class SkDraw; | |
| 86 friend class SkDrawIter; | |
| 87 friend struct Draw1Glyph; | |
| 88 friend class SkMaskFilter; | |
| 89 | |
| 90 typedef SkRefCnt INHERITED; | |
| 91 }; | |
| 92 | |
| 93 #endif |
