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 "SkColorSpace.h" 13 #include "SkSwizzler.h" 14 15 class SkWbmpCodec final : public SkCodec { 16 public: 17 static bool IsWbmp(const void*, size_t); 18 19 /* 20 * Assumes IsWbmp was called and returned true 21 * Creates a wbmp codec 22 * Takes ownership of the stream 23 */ 24 static SkCodec* NewFromStream(SkStream*); 25 26 protected: 27 SkEncodedImageFormat onGetEncodedFormat() const override; 28 Result onGetPixels(const SkImageInfo&, void*, size_t, 29 const Options&, SkPMColor[], int*, int*) override; 30 bool onRewind() override; 31 private: 32 /* 33 * Returns a swizzler on success, nullptr on failure 34 */ 35 SkSwizzler* initializeSwizzler(const SkImageInfo& info, const SkPMColor* ctable, 36 const Options& opts); 37 SkSampler* getSampler(bool createIfNecessary) override { 38 SkASSERT(fSwizzler || !createIfNecessary); 39 return fSwizzler.get(); 40 } 41 42 /* 43 * Read a src row from the encoded stream 44 */ 45 bool readRow(uint8_t* row); 46 47 SkWbmpCodec(int width, int height, const SkEncodedInfo&, SkStream*); 48 49 const size_t fSrcRowBytes; 50 51 // Used for scanline decodes: 52 std::unique_ptr<SkSwizzler> fSwizzler; 53 sk_sp<SkColorTable> fColorTable; 54 SkAutoTMalloc<uint8_t> fSrcBuffer; 55 56 int onGetScanlines(void* dst, int count, size_t dstRowBytes) override; 57 bool onSkipScanlines(int count) override; 58 Result onStartScanlineDecode(const SkImageInfo& dstInfo, const Options& options, 59 SkPMColor inputColorTable[], int* inputColorCount) override; 60 61 typedef SkCodec INHERITED; 62 }; 63 64 #endif // SkCodec_wbmp_DEFINED 65
