1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/skia/trunk/src/core/SkAAClip.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,132 @@
1.4 +
1.5 +/*
1.6 + * Copyright 2011 Google Inc.
1.7 + *
1.8 + * Use of this source code is governed by a BSD-style license that can be
1.9 + * found in the LICENSE file.
1.10 + */
1.11 +
1.12 +#ifndef SkAAClip_DEFINED
1.13 +#define SkAAClip_DEFINED
1.14 +
1.15 +#include "SkBlitter.h"
1.16 +#include "SkRegion.h"
1.17 +
1.18 +class SkAAClip {
1.19 +public:
1.20 + SkAAClip();
1.21 + SkAAClip(const SkAAClip&);
1.22 + ~SkAAClip();
1.23 +
1.24 + SkAAClip& operator=(const SkAAClip&);
1.25 + friend bool operator==(const SkAAClip&, const SkAAClip&);
1.26 + friend bool operator!=(const SkAAClip& a, const SkAAClip& b) {
1.27 + return !(a == b);
1.28 + }
1.29 +
1.30 + void swap(SkAAClip&);
1.31 +
1.32 + bool isEmpty() const { return NULL == fRunHead; }
1.33 + const SkIRect& getBounds() const { return fBounds; }
1.34 +
1.35 + bool setEmpty();
1.36 + bool setRect(const SkIRect&);
1.37 + bool setRect(const SkRect&, bool doAA = true);
1.38 + bool setPath(const SkPath&, const SkRegion* clip = NULL, bool doAA = true);
1.39 + bool setRegion(const SkRegion&);
1.40 + bool set(const SkAAClip&);
1.41 +
1.42 + bool op(const SkAAClip&, const SkAAClip&, SkRegion::Op);
1.43 +
1.44 + // Helpers for op()
1.45 + bool op(const SkIRect&, SkRegion::Op);
1.46 + bool op(const SkRect&, SkRegion::Op, bool doAA);
1.47 + bool op(const SkAAClip&, SkRegion::Op);
1.48 +
1.49 + bool translate(int dx, int dy, SkAAClip* dst) const;
1.50 + bool translate(int dx, int dy) {
1.51 + return this->translate(dx, dy, this);
1.52 + }
1.53 +
1.54 + /**
1.55 + * Allocates a mask the size of the aaclip, and expands its data into
1.56 + * the mask, using kA8_Format
1.57 + */
1.58 + void copyToMask(SkMask*) const;
1.59 +
1.60 + // called internally
1.61 +
1.62 + bool quickContains(int left, int top, int right, int bottom) const;
1.63 + bool quickContains(const SkIRect& r) const {
1.64 + return this->quickContains(r.fLeft, r.fTop, r.fRight, r.fBottom);
1.65 + }
1.66 +
1.67 + const uint8_t* findRow(int y, int* lastYForRow = NULL) const;
1.68 + const uint8_t* findX(const uint8_t data[], int x, int* initialCount = NULL) const;
1.69 +
1.70 + class Iter;
1.71 + struct RunHead;
1.72 + struct YOffset;
1.73 + class Builder;
1.74 +
1.75 +#ifdef SK_DEBUG
1.76 + void validate() const;
1.77 +#else
1.78 + void validate() const {}
1.79 +#endif
1.80 +
1.81 +private:
1.82 + SkIRect fBounds;
1.83 + RunHead* fRunHead;
1.84 +
1.85 + void freeRuns();
1.86 + bool trimBounds();
1.87 + bool trimTopBottom();
1.88 + bool trimLeftRight();
1.89 +
1.90 + friend class Builder;
1.91 + class BuilderBlitter;
1.92 + friend class BuilderBlitter;
1.93 +};
1.94 +
1.95 +///////////////////////////////////////////////////////////////////////////////
1.96 +
1.97 +class SkAAClipBlitter : public SkBlitter {
1.98 +public:
1.99 + SkAAClipBlitter() : fScanlineScratch(NULL) {}
1.100 + virtual ~SkAAClipBlitter();
1.101 +
1.102 + void init(SkBlitter* blitter, const SkAAClip* aaclip) {
1.103 + SkASSERT(aaclip && !aaclip->isEmpty());
1.104 + fBlitter = blitter;
1.105 + fAAClip = aaclip;
1.106 + fAAClipBounds = aaclip->getBounds();
1.107 + }
1.108 +
1.109 + virtual void blitH(int x, int y, int width) SK_OVERRIDE;
1.110 + virtual void blitAntiH(int x, int y, const SkAlpha[],
1.111 + const int16_t runs[]) SK_OVERRIDE;
1.112 + virtual void blitV(int x, int y, int height, SkAlpha alpha) SK_OVERRIDE;
1.113 + virtual void blitRect(int x, int y, int width, int height) SK_OVERRIDE;
1.114 + virtual void blitMask(const SkMask&, const SkIRect& clip) SK_OVERRIDE;
1.115 + virtual const SkBitmap* justAnOpaqueColor(uint32_t* value) SK_OVERRIDE;
1.116 +
1.117 +private:
1.118 + SkBlitter* fBlitter;
1.119 + const SkAAClip* fAAClip;
1.120 + SkIRect fAAClipBounds;
1.121 +
1.122 + // point into fScanlineScratch
1.123 + int16_t* fRuns;
1.124 + SkAlpha* fAA;
1.125 +
1.126 + enum {
1.127 + kSize = 32 * 32
1.128 + };
1.129 + SkAutoSMalloc<kSize> fGrayMaskScratch; // used for blitMask
1.130 + void* fScanlineScratch; // enough for a mask at 32bit, or runs+aa
1.131 +
1.132 + void ensureRunsAndAA();
1.133 +};
1.134 +
1.135 +#endif
