35e5d1b449
The result SkBitmap, the pixel allocator, and the alpha preference need to be communicated from the client to the region decoder. BUG=skia: Review URL: https://codereview.chromium.org/1418093006
44 lines
1.3 KiB
C++
44 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 "SkImageDecoder.h"
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#include "SkTemplates.h"
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/*
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* This class aims to duplicate the current implementation of
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* SkBitmapRegionDecoder in Android.
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*/
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class SkBitmapRegionSampler : 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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SkBitmapRegionSampler(SkImageDecoder* decoder, int width, int height);
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bool decodeRegion(SkBitmap* bitmap, SkBitmap::Allocator* allocator,
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const SkIRect& desiredSubset, int sampleSize,
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SkColorType colorType, bool requireUnpremul) override;
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bool conversionSupported(SkColorType colorType) override {
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// SkBitmapRegionSampler does not allow the client to check if the conversion
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// is supported. We will return true as a default. If the conversion is in
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// fact not supported, decodeRegion() will ignore the prefColorType and choose
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// its own color type. We catch this and fail non-fatally in our test code.
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return true;
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}
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private:
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SkAutoTDelete<SkImageDecoder> fDecoder;
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typedef SkBitmapRegionDecoderInterface INHERITED;
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};
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