| |
| /* |
| * Copyright 2011 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef SkAAClip_DEFINED |
| #define SkAAClip_DEFINED |
| |
| #include "SkBlitter.h" |
| #include "SkRegion.h" |
| |
| class SkAAClip { |
| public: |
| SkAAClip(); |
| SkAAClip(const SkAAClip&); |
| ~SkAAClip(); |
| |
| SkAAClip& operator=(const SkAAClip&); |
| friend bool operator==(const SkAAClip&, const SkAAClip&); |
| friend bool operator!=(const SkAAClip& a, const SkAAClip& b) { |
| return !(a == b); |
| } |
| |
| void swap(SkAAClip&); |
| |
| bool isEmpty() const { return NULL == fRunHead; } |
| const SkIRect& getBounds() const { return fBounds; } |
| |
| bool setEmpty(); |
| bool setRect(const SkIRect&); |
| bool setRect(const SkRect&, bool doAA = true); |
| bool setPath(const SkPath&, const SkRegion* clip = NULL, bool doAA = true); |
| bool setRegion(const SkRegion&); |
| bool set(const SkAAClip&); |
| |
| bool op(const SkAAClip&, const SkAAClip&, SkRegion::Op); |
| |
| // Helpers for op() |
| bool op(const SkIRect&, SkRegion::Op); |
| bool op(const SkRect&, SkRegion::Op, bool doAA); |
| bool op(const SkAAClip&, SkRegion::Op); |
| |
| bool translate(int dx, int dy, SkAAClip* dst) const; |
| bool translate(int dx, int dy) { |
| return this->translate(dx, dy, this); |
| } |
| |
| /** |
| * Allocates a mask the size of the aaclip, and expands its data into |
| * the mask, using kA8_Format |
| */ |
| void copyToMask(SkMask*) const; |
| |
| // called internally |
| |
| bool quickContains(int left, int top, int right, int bottom) const; |
| bool quickContains(const SkIRect& r) const { |
| return this->quickContains(r.fLeft, r.fTop, r.fRight, r.fBottom); |
| } |
| |
| const uint8_t* findRow(int y, int* lastYForRow = NULL) const; |
| const uint8_t* findX(const uint8_t data[], int x, int* initialCount = NULL) const; |
| |
| class Iter; |
| struct RunHead; |
| struct YOffset; |
| class Builder; |
| |
| #ifdef SK_DEBUG |
| void validate() const; |
| #else |
| void validate() const {} |
| #endif |
| |
| private: |
| SkIRect fBounds; |
| RunHead* fRunHead; |
| |
| void freeRuns(); |
| bool trimBounds(); |
| bool trimTopBottom(); |
| bool trimLeftRight(); |
| |
| friend class Builder; |
| class BuilderBlitter; |
| friend class BuilderBlitter; |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| class SkAAClipBlitter : public SkBlitter { |
| public: |
| SkAAClipBlitter() : fScanlineScratch(NULL) {} |
| virtual ~SkAAClipBlitter(); |
| |
| void init(SkBlitter* blitter, const SkAAClip* aaclip) { |
| SkASSERT(aaclip && !aaclip->isEmpty()); |
| fBlitter = blitter; |
| fAAClip = aaclip; |
| fAAClipBounds = aaclip->getBounds(); |
| } |
| |
| virtual void blitH(int x, int y, int width) SK_OVERRIDE; |
| virtual void blitAntiH(int x, int y, const SkAlpha[], |
| const int16_t runs[]) SK_OVERRIDE; |
| virtual void blitV(int x, int y, int height, SkAlpha alpha) SK_OVERRIDE; |
| virtual void blitRect(int x, int y, int width, int height) SK_OVERRIDE; |
| virtual void blitMask(const SkMask&, const SkIRect& clip) SK_OVERRIDE; |
| virtual const SkBitmap* justAnOpaqueColor(uint32_t* value) SK_OVERRIDE; |
| |
| private: |
| SkBlitter* fBlitter; |
| const SkAAClip* fAAClip; |
| SkIRect fAAClipBounds; |
| |
| // point into fScanlineScratch |
| int16_t* fRuns; |
| SkAlpha* fAA; |
| |
| enum { |
| kSize = 32 * 32 |
| }; |
| SkAutoSMalloc<kSize> fGrayMaskScratch; // used for blitMask |
| void* fScanlineScratch; // enough for a mask at 32bit, or runs+aa |
| |
| void ensureRunsAndAA(); |
| }; |
| |
| #endif |