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 "include/core/SkImageInfo.h"
12 #include "include/core/SkPixmap.h"
13 
14 /**
15  *  Helper class to package and trim the parameters passed to writePixels()
16  */
17 struct SkWritePixelsRec {
SkWritePixelsRecSkWritePixelsRec18     SkWritePixelsRec(const SkImageInfo& info, const void* pixels, size_t rowBytes, int x, int y)
19         : fPixels(pixels)
20         , fRowBytes(rowBytes)
21         , fInfo(info)
22         , fX(x)
23         , fY(y)
24     {}
25 
SkWritePixelsRecSkWritePixelsRec26     SkWritePixelsRec(const SkPixmap& pm, int x, int y)
27         : fPixels(pm.addr())
28         , fRowBytes(pm.rowBytes())
29         , fInfo(pm.info())
30         , fX(x)
31         , fY(y)
32     {}
33 
34     const void* fPixels;
35     size_t      fRowBytes;
36     SkImageInfo fInfo;
37     int         fX;
38     int         fY;
39 
40     /*
41      *  On true, may have modified its fields (except fRowBytes) to make it a legal subset
42      *  of the specified dst width/height.
43      *
44      *  On false, leaves self unchanged, but indicates that it does not overlap dst, or
45      *  is not valid (e.g. bad fInfo) for writePixels().
46      */
47     bool trim(int dstWidth, int dstHeight);
48 };
49 
50 #endif
51