44 lines
1.3 KiB
C
44 lines
1.3 KiB
C
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/*
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* Copyright 2015 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "SkBitmap.h"
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#include "SkBitmapRegionDecoderInterface.h"
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#include "SkScanlineDecoder.h"
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/*
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* This class implements SkBitmapRegionDecoder using an SkScanlineDecoder and
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* an SkCanvas. It uses the scanline decoder to subset the height. It then
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* will subset the width and scale by drawing to an SkCanvas.
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*/
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// FIXME (msarett): This implementation does not support WEBP, because WEBP
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// does not have a scanline decoder.
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class SkBitmapRegionCanvas : public SkBitmapRegionDecoderInterface {
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public:
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/*
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* Takes ownership of pointer to decoder
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*/
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SkBitmapRegionCanvas(SkScanlineDecoder* decoder);
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/*
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* Three differences from the Android version:
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* Returns a Skia bitmap instead of an Android bitmap.
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* Android version attempts to reuse a recycled bitmap.
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* Removed the options object and used parameters for color type and
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* sample size.
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*/
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SkBitmap* decodeRegion(int start_x, int start_y, int width, int height,
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int sampleSize, SkColorType prefColorType) override;
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private:
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SkAutoTDelete<SkScanlineDecoder> fDecoder;
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typedef SkBitmapRegionDecoderInterface INHERITED;
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};
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