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1 /* | 1 /* |
2 * Copyright 2015 Google Inc. | 2 * Copyright 2015 Google Inc. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 #ifndef SkSampledCodec_DEFINED | 7 #ifndef SkSampledCodec_DEFINED |
8 #define SkSampledCodec_DEFINED | 8 #define SkSampledCodec_DEFINED |
9 | 9 |
10 #include "SkAndroidCodec.h" | 10 #include "SkAndroidCodec.h" |
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23 | 23 |
24 protected: | 24 protected: |
25 | 25 |
26 SkEncodedFormat onGetEncodedFormat() const override { return fCodec->getEnco
dedFormat(); }; | 26 SkEncodedFormat onGetEncodedFormat() const override { return fCodec->getEnco
dedFormat(); }; |
27 | 27 |
28 SkISize onGetSampledDimensions(int sampleSize) const override; | 28 SkISize onGetSampledDimensions(int sampleSize) const override; |
29 | 29 |
30 bool onGetSupportedSubset(SkIRect* desiredSubset) const override { return tr
ue; } | 30 bool onGetSupportedSubset(SkIRect* desiredSubset) const override { return tr
ue; } |
31 | 31 |
32 SkCodec::Result onGetAndroidPixels(const SkImageInfo& info, void* pixels, si
ze_t rowBytes, | 32 SkCodec::Result onGetAndroidPixels(const SkImageInfo& info, void* pixels, si
ze_t rowBytes, |
33 AndroidOptions& options) override; | 33 const AndroidOptions& options) override; |
34 | 34 |
35 private: | 35 private: |
36 /** | 36 /** |
37 * Find the best way to account for native scaling. | 37 * Find the best way to account for native scaling. |
38 * | 38 * |
39 * Return a size that fCodec can scale to, and adjust sampleSize to finish
scaling. | 39 * Return a size that fCodec can scale to, and adjust sampleSize to finish
scaling. |
40 * | 40 * |
41 * @param sampleSize As an input, the requested sample size. | 41 * @param sampleSize As an input, the requested sample size. |
42 * As an output, sampling needed after letting fCodec | 42 * As an output, sampling needed after letting fCodec |
43 * scale to the returned dimensions. | 43 * scale to the returned dimensions. |
44 * @param nativeSampleSize Optional output parameter. Will be set to the | 44 * @param nativeSampleSize Optional output parameter. Will be set to the |
45 * effective sample size done by fCodec. | 45 * effective sample size done by fCodec. |
46 * @return SkISize The size that fCodec should scale to. | 46 * @return SkISize The size that fCodec should scale to. |
47 */ | 47 */ |
48 SkISize accountForNativeScaling(int* sampleSize, int* nativeSampleSize = nul
lptr) const; | 48 SkISize accountForNativeScaling(int* sampleSize, int* nativeSampleSize = nul
lptr) const; |
49 | 49 |
50 /** | 50 /** |
51 * This fulfills the same contract as onGetAndroidPixels(). | 51 * This fulfills the same contract as onGetAndroidPixels(). |
52 * | 52 * |
53 * We call this function from onGetAndroidPixels() if we have determined | 53 * We call this function from onGetAndroidPixels() if we have determined |
54 * that fCodec does not support the requested scale, and we need to | 54 * that fCodec does not support the requested scale, and we need to |
55 * provide the scale by sampling. | 55 * provide the scale by sampling. |
56 */ | 56 */ |
57 SkCodec::Result sampledDecode(const SkImageInfo& info, void* pixels, size_t
rowBytes, | 57 SkCodec::Result sampledDecode(const SkImageInfo& info, void* pixels, size_t
rowBytes, |
58 AndroidOptions& options); | 58 const AndroidOptions& options); |
59 | 59 |
60 SkAutoTDelete<SkCodec> fCodec; | 60 SkAutoTDelete<SkCodec> fCodec; |
61 | 61 |
62 typedef SkAndroidCodec INHERITED; | 62 typedef SkAndroidCodec INHERITED; |
63 }; | 63 }; |
64 #endif // SkSampledCodec_DEFINED | 64 #endif // SkSampledCodec_DEFINED |
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