/*
 * Copyright (c) 2026 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef STREAMSOURCEBASE_H
#define STREAMSOURCEBASE_H

#include "png.h"
#include "Error.h"
#include <cstdint>
#include <cstddef>

#ifndef PNG_SIG_SIZE
#define PNG_SIG_SIZE 8
#endif

namespace apng_drawable {
/* *
 * StreamSource基类接口，用于从不同数据源读取PNG数据
 */
class StreamSourceBase {
public:
    virtual ~StreamSourceBase() = default;
    virtual int32_t CheckPngSignature() = 0;
    virtual void Init(png_structp png) = 0;
    virtual int32_t GetError() const = 0;
};
}
#endif