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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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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 AndroidOptions& options) override; |
34 | 34 |
35 private: | 35 private: |
| 36 /** |
| 37 * Find the best way to account for native scaling. |
| 38 * |
| 39 * Return a size that fCodec can scale to, and adjust sampleSize to finish
scaling. |
| 40 * |
| 41 * @param sampleSize As an input, the requested sample size. |
| 42 * As an output, sampling needed after letting fCodec |
| 43 * scale to the returned dimensions. |
| 44 * @param nativeSampleSize Optional output parameter. Will be set to the |
| 45 * effective sample size done by fCodec. |
| 46 * @return SkISize The size that fCodec should scale to. |
| 47 */ |
| 48 SkISize accountForNativeScaling(int* sampleSize, int* nativeSampleSize = nul
lptr) const; |
36 | 49 |
37 /** | 50 /** |
38 * This fulfills the same contract as onGetAndroidPixels(). | 51 * This fulfills the same contract as onGetAndroidPixels(). |
39 * | 52 * |
40 * We call this function from onGetAndroidPixels() if we have determined | 53 * We call this function from onGetAndroidPixels() if we have determined |
41 * 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 |
42 * provide the scale by sampling. | 55 * provide the scale by sampling. |
43 */ | 56 */ |
44 SkCodec::Result sampledDecode(const SkImageInfo& info, void* pixels, size_t
rowBytes, | 57 SkCodec::Result sampledDecode(const SkImageInfo& info, void* pixels, size_t
rowBytes, |
45 AndroidOptions& options); | 58 AndroidOptions& options); |
46 | 59 |
47 SkAutoTDelete<SkCodec> fCodec; | 60 SkAutoTDelete<SkCodec> fCodec; |
48 | 61 |
49 typedef SkAndroidCodec INHERITED; | 62 typedef SkAndroidCodec INHERITED; |
50 }; | 63 }; |
51 #endif // SkSampledCodec_DEFINED | 64 #endif // SkSampledCodec_DEFINED |
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