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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 #ifndef SkCodec_wbmp_DEFINED | |
| 9 #define SkCodec_wbmp_DEFINED | |
| 10 | |
| 11 #include "SkCodec.h" | |
| 12 #include "SkSwizzler.h" | |
| 13 | |
| 14 class SkWbmpCodec final : public SkCodec { | |
| 15 public: | |
| 16 static bool IsWbmp(const void*, size_t); | |
| 17 | |
| 18 /* | |
| 19 * Assumes IsWbmp was called and returned true | |
| 20 * Creates a wbmp codec | |
| 21 * Takes ownership of the stream | |
| 22 */ | |
| 23 static SkCodec* NewFromStream(SkStream*); | |
| 24 | |
| 25 protected: | |
| 26 SkEncodedFormat onGetEncodedFormat() const override; | |
| 27 Result onGetPixels(const SkImageInfo&, void*, size_t, | |
| 28 const Options&, SkPMColor[], int*, int*) override; | |
| 29 bool onRewind() override; | |
| 30 private: | |
| 31 /* | |
| 32 * Returns a swizzler on success, nullptr on failure | |
| 33 */ | |
| 34 SkSwizzler* initializeSwizzler(const SkImageInfo& info, const SkPMColor* cta
ble, | |
| 35 const Options& opts); | |
| 36 SkSampler* getSampler(bool createIfNecessary) override { | |
| 37 SkASSERT(fSwizzler || !createIfNecessary); | |
| 38 return fSwizzler; | |
| 39 } | |
| 40 | |
| 41 /* | |
| 42 * Read a src row from the encoded stream | |
| 43 */ | |
| 44 bool readRow(uint8_t* row); | |
| 45 | |
| 46 SkWbmpCodec(const SkImageInfo&, SkStream*); | |
| 47 | |
| 48 const size_t fSrcRowBytes; | |
| 49 | |
| 50 // Used for scanline decodes: | |
| 51 SkAutoTDelete<SkSwizzler> fSwizzler; | |
| 52 SkAutoTUnref<SkColorTable> fColorTable; | |
| 53 SkAutoTMalloc<uint8_t> fSrcBuffer; | |
| 54 | |
| 55 // FIXME: Override onSkipScanlines to avoid swizzling. | |
| 56 int onGetScanlines(void* dst, int count, size_t dstRowBytes) override; | |
| 57 Result onStartScanlineDecode(const SkImageInfo& dstInfo, const Options& opti
ons, | |
| 58 SkPMColor inputColorTable[], int* inputColorCount) override; | |
| 59 | |
| 60 typedef SkCodec INHERITED; | |
| 61 }; | |
| 62 | |
| 63 #endif // SkCodec_wbmp_DEFINED | |
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