src/core/SkProcSpriteBlitter.cpp

/*
 * Copyright 2006 The Android Open Source Project
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */


#if 0   // experimental

class SkProcSpriteBlitter : public SkSpriteBlitter {
public:
    typedef void (*Proc)(void* dst, const void* src, int count, const SkPMColor ctable[]);

    SkProcSpriteBlitter(const SkBitmap& source, Proc proc, unsigned srcShift, unsigned dstShift)
        : SkSpriteBlitter(source), fProc(proc), fSrcShift(SkToU8(srcShift)), fDstShift(SkToU8(dstShift)) {}

    virtual void blitRect(int x, int y, int width, int height)
    {
        size_t      dstRB = fDevice.rowBytes();
        size_t      srcRB = fSource.rowBytes();
        char*       dst = (char*)fDevice.getPixels() + y * dstRB + (x << fDstShift);
        const char* src = (const char*)fSource.getPixels() + (y - fTop) * srcRB + ((x - fLeft) << fSrcShift);
        Proc        proc = fProc;
        const SkPMColor* ctable = NULL;

        if fSource.getColorTable())
            ctable = fSource.getColorTable()->lockColors();

        while (--height >= 0)
        {
            proc(dst, src, width, ctable);
            dst += dstRB;
            src += srcRB;
        }

        if fSource.getColorTable())
            fSource.getColorTable()->unlockColors();
    }

private:
    Proc    fProc;
    uint8_t fSrcShift, fDstShift;
};

#endif