1 /* 2 * Copyright (C) 2021 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 16 #ifndef BMP_STREAM_H 17 #define BMP_STREAM_H 18 19 #include <cstdint> 20 #include <string> 21 #include "include/core/SkStream.h" 22 #include "input_data_stream.h" 23 #include "nocopyable.h" 24 25 namespace OHOS { 26 namespace ImagePlugin { 27 class BmpStream : public SkStream { 28 public: 29 BmpStream() = default; 30 explicit BmpStream(InputDataStream *stream); ~BmpStream()31 virtual ~BmpStream() override {}; 32 /** 33 * Reads or skips size number of bytes. 34 * if buffer is null, skip size bytes, return how many bytes skipped. 35 * else copy size bytes into buffer, return how many bytes copied. 36 */ 37 size_t read(void *buffer, size_t size) override; 38 /** 39 * Peeks size number of bytes. 40 */ 41 size_t peek(void *buffer, size_t size) const override; 42 /** 43 * Returns true when all the bytes in the stream have been read. 44 */ 45 bool isAtEnd() const override; 46 47 private: 48 DISALLOW_COPY_AND_MOVE(BmpStream); 49 ImagePlugin::InputDataStream *inputStream_ = nullptr; 50 }; 51 } // namespace ImagePlugin 52 } // namespace OHOS 53 54 #endif // BMP_STREAM_H 55