1 /* 2 * Copyright (C) 2023 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 #ifndef SVG_DECODER_H 16 #define SVG_DECODER_H 17 18 #include "abs_image_decoder.h" 19 #include "nocopyable.h" 20 #include "plugin_class_base.h" 21 #include "include/core/SkStream.h" 22 #include "include/core/SkSize.h" 23 24 #include "modules/svg/include/SkSVGDOM.h" 25 #include "modules/svg/include/SkSVGSVG.h" 26 #include "modules/svg/include/SkSVGNode.h" 27 28 namespace OHOS { 29 namespace ImagePlugin { 30 using namespace Media; 31 32 class SvgDecoder : public AbsImageDecoder, public OHOS::MultimediaPlugin::PluginClassBase { 33 public: 34 SvgDecoder(); 35 ~SvgDecoder(); 36 void SetSource(InputDataStream &sourceStream) override; 37 void Reset() override; 38 uint32_t SetDecodeOptions(uint32_t index, const PixelDecodeOptions &opts, PlImageInfo &info) override; 39 uint32_t Decode(uint32_t index, DecodeContext &context) override; 40 uint32_t PromoteIncrementalDecode(uint32_t index, ProgDecodeContext &context) override; 41 uint32_t GetTopLevelImageNum(uint32_t &num) override; 42 uint32_t GetImageSize(uint32_t index, Size &size) override; GetPluginType()43 std::string GetPluginType() override 44 { 45 return "svg"; 46 } 47 48 private: 49 DISALLOW_COPY_AND_MOVE(SvgDecoder); 50 bool AllocBuffer(DecodeContext &context); 51 bool BuildStream(); 52 bool BuildDom(); 53 uint32_t DoDecodeHeader(); 54 uint32_t DoSetDecodeOptions(uint32_t index, const PixelDecodeOptions &opts, PlImageInfo &info); 55 uint32_t DoGetImageSize(uint32_t index, Size &size); 56 uint32_t DoDecode(uint32_t index, DecodeContext &context); 57 58 private: 59 enum class SvgDecodingState : int32_t { 60 UNDECIDED = 0, 61 SOURCE_INITED = 1, 62 BASE_INFO_PARSING = 2, 63 BASE_INFO_PARSED = 3, 64 IMAGE_DECODING = 4, 65 IMAGE_ERROR = 5, 66 IMAGE_PARTIAL = 6, 67 IMAGE_DECODED = 7 68 }; 69 70 InputDataStream *inputStreamPtr_ {nullptr}; 71 SvgDecodingState state_ {SvgDecodingState::UNDECIDED}; 72 73 std::unique_ptr<SkMemoryStream> svgStream_; 74 sk_sp<SkSVGDOM> svgDom_; 75 SkSize svgSize_ {0, 0}; 76 77 PixelDecodeOptions opts_; 78 }; 79 } // namespace ImagePlugin 80 } // namespace OHOS 81 #endif // SVG_DECODER_H