Line data    Source code

       1             : /*
       2             :  * Copyright 2006 The Android Open Source Project
       3             :  *
       4             :  * Use of this source code is governed by a BSD-style license that can be
       5             :  * found in the LICENSE file.
       6             :  */
       7             : 
       8             : #ifndef SkSpriteBlitter_DEFINED
       9             : #define SkSpriteBlitter_DEFINED
      10             : 
      11             : #include "SkBlitter.h"
      12             : #include "SkPixmap.h"
      13             : #include "SkShader.h"
      14             : 
      15             : class SkPaint;
      16             : 
      17             : // SkSpriteBlitter specializes SkBlitter in a way to move large rectangles of pixels around.
      18             : // Because of this use, the main primitive shifts from blitH style things to the more efficient
      19             : // blitRect.
      20         118 : class SkSpriteBlitter : public SkBlitter {
      21             : public:
      22             :     SkSpriteBlitter(const SkPixmap& source);
      23             : 
      24             :     virtual void setup(const SkPixmap& dst, int left, int top, const SkPaint&);
      25             : 
      26             :     // blitH, blitAntiH, blitV and blitMask should not be called on an SkSpriteBlitter.
      27             :     void blitH(int x, int y, int width) override;
      28             :     void blitAntiH(int x, int y, const SkAlpha antialias[], const int16_t runs[]) override;
      29             :     void blitV(int x, int y, int height, SkAlpha alpha) override;
      30             :     void blitMask(const SkMask&, const SkIRect& clip) override;
      31             : 
      32             :     // A SkSpriteBlitter must implement blitRect.
      33             :     void blitRect(int x, int y, int width, int height) override = 0;
      34             : 
      35             :     static SkSpriteBlitter* ChooseD16(const SkPixmap& source, const SkPaint&, SkArenaAlloc*);
      36             :     static SkSpriteBlitter* ChooseL32(const SkPixmap& source, const SkPaint&, SkArenaAlloc*);
      37             :     static SkSpriteBlitter* ChooseS32(const SkPixmap& source, const SkPaint&, SkArenaAlloc*);
      38             :     static SkSpriteBlitter* ChooseF16(const SkPixmap& source, const SkPaint&, SkArenaAlloc*);
      39             : 
      40             : protected:
      41             :     SkPixmap        fDst;
      42             :     const SkPixmap  fSource;
      43             :     int             fLeft, fTop;
      44             :     const SkPaint*  fPaint;
      45             : 
      46             : private:
      47             :     typedef SkBlitter INHERITED;
      48             : };
      49             : 
      50             : #endif