/*
* Copyright 2017 Google LLC
*
* Use of this source code is governed by a BSD - style license that can be
* found in the LICENSE file .
*/
#ifndef SkWritePixelsRec_DEFINED
#define SkWritePixelsRec_DEFINED
#include "include/core/SkImageInfo.h"
#include "include/core/SkPixmap.h"
#include <cstddef>
/**
* Helper class to package and trim the parameters passed to writePixels ( )
*/
struct SkWritePixelsRec {
/**
* @ param x , y The offset into the destination . Negative values are supported ; the portion
* of the rectangle that is " off - screen " ( negative x or y ) will cause the
* corresponding area in the source pixels to be ignored .
*/
SkWritePixelsRec(const SkImageInfo& info, const void * pixels, size_t rowBytes, int x, int y)
: fPixels(pixels)
, fRowBytes(rowBytes)
, fInfo(info)
, fX(x)
, fY(y)
{}
SkWritePixelsRec(const SkPixmap& pm, int x, int y)
: fPixels(pm.addr())
, fRowBytes(pm.rowBytes())
, fInfo(pm.info())
, fX(x)
, fY(y)
{}
const 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 dst width / height . Negative fX or fY will cause fPixels to be
* incremented and fInfo to be reduced to account for the portion that is " off - screen " .
*
* On false , leaves self unchanged , but indicates that it does not overlap dst , or
* is not valid ( e . g . bad fInfo ) for writePixels ( ) .
*/
bool trim(int dstWidth, int dstHeight);
};
#endif
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