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| 1 /* |
| 2 * Copyright 2016 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 "SkTypes.h" |
| 9 |
| 10 #if defined(SK_BUILD_FOR_WIN) |
| 11 |
| 12 #include "SkData.h" |
| 13 #include "SkImageGenerator.h" |
| 14 #include "SkTemplates.h" |
| 15 #include "SkTScopedComPtr.h" |
| 16 |
| 17 #include <wincodec.h> |
| 18 |
| 19 /* |
| 20 * Any Windows program that uses COM must initialize the COM library by calling |
| 21 * the CoInitializeEx function. In addition, each thread that uses a COM |
| 22 * interface must make a separate call to this function. |
| 23 * |
| 24 * For every successful call to CoInitializeEx, the thread must call |
| 25 * CoUninitialize before it exits. |
| 26 * |
| 27 * SkImageGeneratorWIC requires the COM library and leaves it to the client to |
| 28 * initialize COM for their application. |
| 29 * |
| 30 * For more information on initializing COM, please see: |
| 31 * https://msdn.microsoft.com/en-us/library/windows/desktop/ff485844.aspx |
| 32 */ |
| 33 class SkImageGeneratorWIC : public SkImageGenerator { |
| 34 public: |
| 35 /* |
| 36 * Refs the data if an image generator can be returned. Otherwise does |
| 37 * not affect the data. |
| 38 */ |
| 39 static SkImageGenerator* NewFromEncodedWIC(SkData* data); |
| 40 |
| 41 protected: |
| 42 SkData* onRefEncodedData(SK_REFENCODEDDATA_CTXPARAM) override; |
| 43 |
| 44 bool onGetPixels(const SkImageInfo& info, void* pixels, size_t rowBytes, SkP
MColor ctable[], |
| 45 int* ctableCount) override; |
| 46 |
| 47 private: |
| 48 /* |
| 49 * Takes ownership of the imagingFactory |
| 50 * Takes ownership of the imageSource |
| 51 * Refs the data |
| 52 */ |
| 53 SkImageGeneratorWIC(const SkImageInfo& info, IWICImagingFactory* imagingFact
ory, |
| 54 IWICBitmapSource* imageSource, SkData* data); |
| 55 |
| 56 SkTScopedComPtr<IWICImagingFactory> fImagingFactory; |
| 57 SkTScopedComPtr<IWICBitmapSource> fImageSource; |
| 58 SkAutoTUnref<SkData> fData; |
| 59 |
| 60 typedef SkImageGenerator INHERITED; |
| 61 }; |
| 62 |
| 63 #endif // SK_BUILD_FOR_WIN |
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