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
15class 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.
20class SkSpriteBlitter : public SkBlitter {
21public:
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
40protected:
41    SkPixmap        fDst;
42    const SkPixmap  fSource;
43    int             fLeft, fTop;
44    const SkPaint*  fPaint;
45
46private:
47    typedef SkBlitter INHERITED;
48};
49
50#endif
51