| /* |
| * Copyright 2015 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "SkBitmap.h" |
| #include "SkBitmapRegionDecoder.h" |
| #include "SkCodec.h" |
| |
| /* |
| * This class implements SkBitmapRegionDecoder using an SkCodec and |
| * an SkCanvas. It uses the scanline decoder to subset the height. It then |
| * will subset the width and scale by drawing to an SkCanvas. |
| */ |
| // FIXME (msarett): This implementation does not support WEBP, because WEBP |
| // does not have a scanline decoder. |
| class SkBitmapRegionCanvas : public SkBitmapRegionDecoder { |
| public: |
| |
| /* |
| * Takes ownership of pointer to decoder |
| */ |
| SkBitmapRegionCanvas(SkCodec* decoder); |
| |
| bool decodeRegion(SkBitmap* bitmap, SkBitmap::Allocator* allocator, |
| const SkIRect& desiredSubset, int sampleSize, |
| SkColorType colorType, bool requireUnpremul) override; |
| |
| bool conversionSupported(SkColorType colorType) override; |
| |
| SkEncodedFormat getEncodedFormat() override { return fDecoder->getEncodedFormat(); } |
| |
| private: |
| |
| SkAutoTDelete<SkCodec> fDecoder; |
| |
| typedef SkBitmapRegionDecoder INHERITED; |
| |
| }; |