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comparison: gfx/skia/trunk/src/core/SkAAClip.h
gfx/skia/trunk/src/core/SkAAClip.h
- branch
- TOR_BUG_3246
- changeset 6
- 8bccb770b82d
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| -1:000000000000 | 0:51016d26bd80 |
|---|---|
| 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 | |
| 9 #ifndef SkAAClip_DEFINED | |
| 10 #define SkAAClip_DEFINED | |
| 11 | |
| 12 #include "SkBlitter.h" | |
| 13 #include "SkRegion.h" | |
| 14 | |
| 15 class SkAAClip { | |
| 16 public: | |
| 17 SkAAClip(); | |
| 18 SkAAClip(const SkAAClip&); | |
| 19 ~SkAAClip(); | |
| 20 | |
| 21 SkAAClip& operator=(const SkAAClip&); | |
| 22 friend bool operator==(const SkAAClip&, const SkAAClip&); | |
| 23 friend bool operator!=(const SkAAClip& a, const SkAAClip& b) { | |
| 24 return !(a == b); | |
| 25 } | |
| 26 | |
| 27 void swap(SkAAClip&); | |
| 28 | |
| 29 bool isEmpty() const { return NULL == fRunHead; } | |
| 30 const SkIRect& getBounds() const { return fBounds; } | |
| 31 | |
| 32 bool setEmpty(); | |
| 33 bool setRect(const SkIRect&); | |
| 34 bool setRect(const SkRect&, bool doAA = true); | |
| 35 bool setPath(const SkPath&, const SkRegion* clip = NULL, bool doAA = true); | |
| 36 bool setRegion(const SkRegion&); | |
| 37 bool set(const SkAAClip&); | |
| 38 | |
| 39 bool op(const SkAAClip&, const SkAAClip&, SkRegion::Op); | |
| 40 | |
| 41 // Helpers for op() | |
| 42 bool op(const SkIRect&, SkRegion::Op); | |
| 43 bool op(const SkRect&, SkRegion::Op, bool doAA); | |
| 44 bool op(const SkAAClip&, SkRegion::Op); | |
| 45 | |
| 46 bool translate(int dx, int dy, SkAAClip* dst) const; | |
| 47 bool translate(int dx, int dy) { | |
| 48 return this->translate(dx, dy, this); | |
| 49 } | |
| 50 | |
| 51 /** | |
| 52 * Allocates a mask the size of the aaclip, and expands its data into | |
| 53 * the mask, using kA8_Format | |
| 54 */ | |
| 55 void copyToMask(SkMask*) const; | |
| 56 | |
| 57 // called internally | |
| 58 | |
| 59 bool quickContains(int left, int top, int right, int bottom) const; | |
| 60 bool quickContains(const SkIRect& r) const { | |
| 61 return this->quickContains(r.fLeft, r.fTop, r.fRight, r.fBottom); | |
| 62 } | |
| 63 | |
| 64 const uint8_t* findRow(int y, int* lastYForRow = NULL) const; | |
| 65 const uint8_t* findX(const uint8_t data[], int x, int* initialCount = NULL) const; | |
| 66 | |
| 67 class Iter; | |
| 68 struct RunHead; | |
| 69 struct YOffset; | |
| 70 class Builder; | |
| 71 | |
| 72 #ifdef SK_DEBUG | |
| 73 void validate() const; | |
| 74 #else | |
| 75 void validate() const {} | |
| 76 #endif | |
| 77 | |
| 78 private: | |
| 79 SkIRect fBounds; | |
| 80 RunHead* fRunHead; | |
| 81 | |
| 82 void freeRuns(); | |
| 83 bool trimBounds(); | |
| 84 bool trimTopBottom(); | |
| 85 bool trimLeftRight(); | |
| 86 | |
| 87 friend class Builder; | |
| 88 class BuilderBlitter; | |
| 89 friend class BuilderBlitter; | |
| 90 }; | |
| 91 | |
| 92 /////////////////////////////////////////////////////////////////////////////// | |
| 93 | |
| 94 class SkAAClipBlitter : public SkBlitter { | |
| 95 public: | |
| 96 SkAAClipBlitter() : fScanlineScratch(NULL) {} | |
| 97 virtual ~SkAAClipBlitter(); | |
| 98 | |
| 99 void init(SkBlitter* blitter, const SkAAClip* aaclip) { | |
| 100 SkASSERT(aaclip && !aaclip->isEmpty()); | |
| 101 fBlitter = blitter; | |
| 102 fAAClip = aaclip; | |
| 103 fAAClipBounds = aaclip->getBounds(); | |
| 104 } | |
| 105 | |
| 106 virtual void blitH(int x, int y, int width) SK_OVERRIDE; | |
| 107 virtual void blitAntiH(int x, int y, const SkAlpha[], | |
| 108 const int16_t runs[]) SK_OVERRIDE; | |
| 109 virtual void blitV(int x, int y, int height, SkAlpha alpha) SK_OVERRIDE; | |
| 110 virtual void blitRect(int x, int y, int width, int height) SK_OVERRIDE; | |
| 111 virtual void blitMask(const SkMask&, const SkIRect& clip) SK_OVERRIDE; | |
| 112 virtual const SkBitmap* justAnOpaqueColor(uint32_t* value) SK_OVERRIDE; | |
| 113 | |
| 114 private: | |
| 115 SkBlitter* fBlitter; | |
| 116 const SkAAClip* fAAClip; | |
| 117 SkIRect fAAClipBounds; | |
| 118 | |
| 119 // point into fScanlineScratch | |
| 120 int16_t* fRuns; | |
| 121 SkAlpha* fAA; | |
| 122 | |
| 123 enum { | |
| 124 kSize = 32 * 32 | |
| 125 }; | |
| 126 SkAutoSMalloc<kSize> fGrayMaskScratch; // used for blitMask | |
| 127 void* fScanlineScratch; // enough for a mask at 32bit, or runs+aa | |
| 128 | |
| 129 void ensureRunsAndAA(); | |
| 130 }; | |
| 131 | |
| 132 #endif |
