| /* |
| * Copyright 2015 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef SkCodec_wbmp_DEFINED |
| #define SkCodec_wbmp_DEFINED |
| |
| #include "SkCodec.h" |
| #include "SkColorSpace.h" |
| #include "SkSwizzler.h" |
| |
| class SkWbmpCodec final : public SkCodec { |
| public: |
| static bool IsWbmp(const void*, size_t); |
| |
| /* |
| * Assumes IsWbmp was called and returned true |
| * Creates a wbmp codec |
| * Takes ownership of the stream |
| */ |
| static std::unique_ptr<SkCodec> MakeFromStream(std::unique_ptr<SkStream>, Result*); |
| |
| protected: |
| SkEncodedImageFormat onGetEncodedFormat() const override; |
| Result onGetPixels(const SkImageInfo&, void*, size_t, |
| const Options&, int*) override; |
| bool onRewind() override; |
| bool conversionSupported(const SkImageInfo& dst, SkColorType srcColor, |
| bool srcIsOpaque, bool needsXform) override; |
| // No need to Xform; all pixels are either black or white. |
| bool usesColorXform() const override { return false; } |
| private: |
| /* |
| * Returns a swizzler on success, nullptr on failure |
| */ |
| SkSwizzler* initializeSwizzler(const SkImageInfo& info, |
| const Options& opts); |
| SkSampler* getSampler(bool createIfNecessary) override { |
| SkASSERT(fSwizzler || !createIfNecessary); |
| return fSwizzler.get(); |
| } |
| |
| /* |
| * Read a src row from the encoded stream |
| */ |
| bool readRow(uint8_t* row); |
| |
| SkWbmpCodec(SkEncodedInfo&&, std::unique_ptr<SkStream>); |
| |
| const size_t fSrcRowBytes; |
| |
| // Used for scanline decodes: |
| std::unique_ptr<SkSwizzler> fSwizzler; |
| SkAutoTMalloc<uint8_t> fSrcBuffer; |
| |
| int onGetScanlines(void* dst, int count, size_t dstRowBytes) override; |
| bool onSkipScanlines(int count) override; |
| Result onStartScanlineDecode(const SkImageInfo& dstInfo, |
| const Options& options) override; |
| |
| typedef SkCodec INHERITED; |
| }; |
| |
| #endif // SkCodec_wbmp_DEFINED |