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/*
* Copyright 2011 The Android Open Source Project
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkBitmapRegionDecoder_DEFINED
#define SkBitmapRegionDecoder_DEFINED
#include "SkBitmap.h"
#include "SkImageDecoder.h"
#include "SkStream.h"
struct SkIRect;
/**
* SkBitmapRegionDecoder can be used to decode a specified rect from an image.
* This is particularly useful when the original image is large and you only
* need parts of the image.
*
* However, not all image codecs on all platforms support this feature so be
* prepared to fallback to standard decoding if decodeRegion(...) returns false.
*/
class SkBitmapRegionDecoder {
public:
SkBitmapRegionDecoder(SkImageDecoder* decoder, SkStream* stream,
int width, int height) {
fDecoder = decoder;
fStream = stream;
fWidth = width;
fHeight = height;
}
~SkBitmapRegionDecoder() {
SkDELETE(fDecoder);
SkSafeUnref(fStream);
}
bool decodeRegion(SkBitmap* bitmap, const SkIRect& rect,
SkBitmap::Config pref, int sampleSize);
SkImageDecoder* getDecoder() const { return fDecoder; }
int getWidth() const { return fWidth; }
int getHeight() const { return fHeight; }
private:
SkImageDecoder* fDecoder;
SkStream* fStream;
int fWidth;
int fHeight;
};
#endif
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