/*

 * Copyright 2014 Google Inc.

 *

 * Use of this source code is governed by a BSD-style license that can be

 * found in the LICENSE file.

 */

#ifndef SkReadPixelsRec_DEFINED

#define SkReadPixelsRec_DEFINED

#include "include/core/SkImageInfo.h"

#include "include/core/SkPixmap.h"

#include <cstddef>

/**

 *  Helper class to package and trim the parameters passed to readPixels()

 */

struct SkReadPixelsRec {

    SkReadPixelsRec(const SkImageInfo& info, void* pixels, size_t rowBytes, int x, int y)

        : fPixels(pixels)

        , fRowBytes(rowBytes)

        , fInfo(info)

        , fX(x)

        , fY(y)

    {}

    SkReadPixelsRec(const SkPixmap& pm, int x, int y)

        : fPixels(pm.writable_addr())

        , fRowBytes(pm.rowBytes())

        , fInfo(pm.info())

        , fX(x)

        , fY(y)

    {}

    void*       fPixels;

    size_t      fRowBytes;

    SkImageInfo fInfo;

    int         fX;

    int         fY;

    /*

     *  On true, may have modified its fields (except fRowBytes) to make it a legal subset

     *  of the specified src width/height.

     *

     *  On false, leaves self unchanged, but indicates that it does not overlap src, or

     *  is not valid (e.g. bad fInfo) for readPixels().

     */

    bool trim(int srcWidth, int srcHeight);

};

#endif