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1 /* | |
2 * Copyright 2015 Google Inc. | |
3 * | |
4 * Use of this source code is governed by a BSD-style license that can be | |
5 * found in the LICENSE file. | |
6 */ | |
7 | |
8 #include "SkBitmap.h" | |
9 #include "SkBitmapRegionDecoder.h" | |
10 #include "SkImageDecoder.h" | |
11 #include "SkTemplates.h" | |
12 | |
13 /* | |
14 * This class aims to duplicate the current implementation of | |
15 * SkBitmapRegionDecoder in Android. | |
16 */ | |
17 class SkBitmapRegionSampler : public SkBitmapRegionDecoder { | |
18 public: | |
19 | |
20 /* | |
21 * Takes ownership of pointer to decoder | |
22 */ | |
23 SkBitmapRegionSampler(SkImageDecoder* decoder, int width, int height); | |
24 | |
25 bool decodeRegion(SkBitmap* bitmap, SkBitmap::Allocator* allocator, | |
26 const SkIRect& desiredSubset, int sampleSize, | |
27 SkColorType colorType, bool requireUnpremul) override; | |
28 | |
29 bool conversionSupported(SkColorType colorType) override { | |
30 // SkBitmapRegionSampler does not allow the client to check if the conve
rsion | |
31 // is supported. We will return true as a default. If the conversion i
s in | |
32 // fact not supported, decodeRegion() will ignore the prefColorType and
choose | |
33 // its own color type. We catch this and fail non-fatally in our test c
ode. | |
34 return true; | |
35 } | |
36 | |
37 SkEncodedFormat getEncodedFormat() override { return (SkEncodedFormat) fDeco
der->getFormat(); } | |
38 | |
39 private: | |
40 | |
41 SkAutoTDelete<SkImageDecoder> fDecoder; | |
42 | |
43 typedef SkBitmapRegionDecoder INHERITED; | |
44 | |
45 }; | |
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