SkBlitRow.h

/*
 * 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 SkBlitRow_DEFINED
#define SkBlitRow_DEFINED

#include "SkBitmap.h"
#include "SkColor.h"

class SkBlitRow {
public:
    enum Flags16 {
        kGlobalAlpha_Flag   = 0x01,
        kSrcPixelAlpha_Flag = 0x02,
        kDither_Flag        = 0x04
    };

    typedef void (*Proc16)(uint16_t dst[], const SkPMColor src[], int count,
                           U8CPU alpha, int x, int y);

    static Proc16 Factory16(unsigned flags);

    typedef void (*ColorProc16)(uint16_t dst[], SkPMColor src, int count, int x, int y);

    // Note : we ignore the kGlobalAlpha_Flag setting, but do respect kSrcPixelAlpha_Flag
    static ColorProc16 ColorFactory16(unsigned flags);


    enum Flags32 {
        kGlobalAlpha_Flag32     = 1 << 0,
        kSrcPixelAlpha_Flag32   = 1 << 1
    };

    typedef void (*Proc32)(uint32_t dst[], const SkPMColor src[], int count, U8CPU alpha);

    static Proc32 Factory32(unsigned flags32);

    static void Color32(SkPMColor dst[], const SkPMColor src[], int count, SkPMColor color);

    static Proc32 PlatformProcs32(unsigned flags);

    static Proc16 PlatformFactory565(unsigned flags);
    static ColorProc16 PlatformColorFactory565(unsigned flags);

private:
    enum {
        kFlags16_Mask = 7,
        kFlags32_Mask = 3
    };
};

#endif