| /* |
| * Copyright (C) 2022 The Android Open Source Project |
| * |
| * 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 MINIKIN_MINIKIN_FONT_FACTORY_H |
| #define MINIKIN_MINIKIN_FONT_FACTORY_H |
| |
| #include "minikin/Buffer.h" |
| #include "minikin/MinikinFont.h" |
| |
| namespace minikin { |
| |
| // A class to serialize / deserialize MinikinFont instance into / from memory buffer. |
| class MinikinFontFactory { |
| public: |
| MinikinFontFactory() {} |
| |
| virtual ~MinikinFontFactory() = 0; |
| |
| // Create MinikinFont instance from the buffer. |
| virtual std::shared_ptr<MinikinFont> create(BufferReader reader) const = 0; |
| |
| // Skip a MinikinFont region in the buffer and advance the reader to the |
| // next position. |
| virtual void skip(BufferReader* reader) const = 0; |
| |
| // Serialize MinikinFont into the buffer. |
| virtual void write(BufferWriter* writer, const MinikinFont* minikinFont) const = 0; |
| |
| // Return the singleton MinikinFontFactory instance. |
| // setInstance() must be called before any MinikinFont instance is |
| // serialized or deserialized. |
| static const MinikinFontFactory& getInstance(); |
| |
| // Set the factory instance. |
| // The factory must be a singleton and cannot be changed during the process lifetime. |
| // It is safe to call this method multiple times with the same instance. |
| // This method itself is not thread safe. The call to this method, as well |
| // as deserialized MinikinFont objects, must be synchronized by the caller. |
| static void setInstance(const MinikinFontFactory* factory); |
| }; |
| |
| } // namespace minikin |
| |
| #endif // MINIKIN_MINIKIN_FONT_FACTORY_H |