1/*
2 * Copyright 2017 Google Inc.
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 SkWritePixelsRec_DEFINED
9#define SkWritePixelsRec_DEFINED
10
11#include "SkImageInfo.h"
12
13/**
14 *  Helper class to package and trim the parameters passed to writePixels()
15 */
16struct SkWritePixelsRec {
17    SkWritePixelsRec(const SkImageInfo& info, const void* pixels, size_t rowBytes, int x, int y)
18        : fPixels(pixels)
19        , fRowBytes(rowBytes)
20        , fInfo(info)
21        , fX(x)
22        , fY(y)
23    {}
24
25    SkWritePixelsRec(const SkPixmap& pm, int x, int y)
26        : fPixels(pm.addr())
27        , fRowBytes(pm.rowBytes())
28        , fInfo(pm.info())
29        , fX(x)
30        , fY(y)
31    {}
32
33    const void* fPixels;
34    size_t      fRowBytes;
35    SkImageInfo fInfo;
36    int         fX;
37    int         fY;
38
39    /*
40     *  On true, may have modified its fields (except fRowBytes) to make it a legal subset
41     *  of the specified dst width/height.
42     *
43     *  On false, leaves self unchanged, but indicates that it does not overlap dst, or
44     *  is not valid (e.g. bad fInfo) for writePixels().
45     */
46    bool trim(int dstWidth, int dstHeight);
47};
48
49#endif
50