04965c6f11
Use SkCodecPrintf instead of SkDebugf. Check if the conversion is possible rather than starting many decodes that will certainly fail. Small refactor to code that deals with subsets that fall outside of the image. BUG=skia: Review URL: https://codereview.chromium.org/1395383002
46 lines
1.3 KiB
C++
46 lines
1.3 KiB
C++
/*
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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 "SkCodec.h"
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/*
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* This class implements SkBitmapRegionDecoder using an SkCodec 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(SkCodec* 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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bool conversionSupported(SkColorType colorType) override;
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private:
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SkAutoTDelete<SkCodec> fDecoder;
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typedef SkBitmapRegionDecoderInterface INHERITED;
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};
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