| /* |
| * 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 SkBmpMaskCodec_DEFINED |
| #define SkBmpMaskCodec_DEFINED |
| |
| #include "include/codec/SkCodec.h" |
| #include "include/core/SkTypes.h" |
| #include "src/codec/SkBmpBaseCodec.h" |
| #include "src/codec/SkMaskSwizzler.h" |
| #include "src/codec/SkMasks.h" |
| |
| #include <cstddef> |
| #include <cstdint> |
| #include <memory> |
| |
| class SkSampler; |
| class SkStream; |
| struct SkEncodedInfo; |
| struct SkImageInfo; |
| |
| /* |
| * This class implements the decoding for bmp images using bit masks |
| */ |
| class SkBmpMaskCodec : public SkBmpBaseCodec { |
| public: |
| |
| /* |
| * Creates an instance of the decoder |
| * |
| * Called only by SkBmpCodec::MakeFromStream |
| * There should be no other callers despite this being public |
| * |
| * @param info contains properties of the encoded data |
| * @param stream the stream of encoded image data |
| * @param bitsPerPixel the number of bits used to store each pixel |
| * @param masks color masks for certain bmp formats |
| * @param rowOrder indicates whether rows are ordered top-down or bottom-up |
| */ |
| SkBmpMaskCodec(SkEncodedInfo&& info, std::unique_ptr<SkStream>, |
| uint16_t bitsPerPixel, SkMasks* masks, |
| SkCodec::SkScanlineOrder rowOrder); |
| |
| protected: |
| |
| Result onGetPixels(const SkImageInfo& dstInfo, void* dst, |
| size_t dstRowBytes, const Options&, |
| int*) override; |
| |
| SkCodec::Result onPrepareToDecode(const SkImageInfo& dstInfo, |
| const SkCodec::Options& options) override; |
| |
| private: |
| |
| SkSampler* getSampler(bool createIfNecessary) override { |
| SkASSERT(fMaskSwizzler); |
| return fMaskSwizzler.get(); |
| } |
| |
| int decodeRows(const SkImageInfo& dstInfo, void* dst, size_t dstRowBytes, |
| const Options& opts) override; |
| |
| std::unique_ptr<SkMasks> fMasks; |
| std::unique_ptr<SkMaskSwizzler> fMaskSwizzler; |
| |
| using INHERITED = SkBmpBaseCodec; |
| }; |
| #endif // SkBmpMaskCodec_DEFINED |