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 "SkStream.h" 22 #include "hilog/log.h" 23 #include "input_data_stream.h" 24 #include "log_tags.h" 25 #include "nocopyable.h" 26 27 namespace OHOS { 28 namespace ImagePlugin { 29 class BmpStream : public SkStream { 30 public: 31 BmpStream() = default; 32 explicit BmpStream(InputDataStream *stream); ~BmpStream()33 virtual ~BmpStream() override {}; 34 /** 35 * Reads or skips size number of bytes. 36 * if buffer is null, skip size bytes, return how many bytes skipped. 37 * else copy size bytes into buffer, return how many bytes copied. 38 */ 39 size_t read(void *buffer, size_t size) override; 40 /** 41 * Peeks size number of bytes. 42 */ 43 size_t peek(void *buffer, size_t size) const override; 44 /** 45 * Returns true when all the bytes in the stream have been read. 46 */ 47 bool isAtEnd() const override; 48 49 private: 50 DISALLOW_COPY_AND_MOVE(BmpStream); 51 ImagePlugin::InputDataStream *inputStream_ = nullptr; 52 }; 53 } // namespace ImagePlugin 54 } // namespace OHOS 55 56 #endif // BMP_STREAM_H 57