| /* |
| * Copyright 2011 Google Inc. All Rights Reserved. |
| * |
| * 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 TYPOGRAPHY_FONT_SFNTLY_SRC_SFNTLY_FONT_DATA_TABLE_H_ |
| #define TYPOGRAPHY_FONT_SFNTLY_SRC_SFNTLY_FONT_DATA_TABLE_H_ |
| |
| #include "sfntly/data/readable_font_data.h" |
| #include "sfntly/font_data_table_builder_container.h" |
| #include "sfntly/port/refcount.h" |
| |
| namespace sfntly { |
| |
| class FontDataTable : virtual public RefCount { |
| public: |
| // Note: original version is abstract Builder<T extends FontDataTable> |
| // C++ template is not designed that way so plain class is chosen. |
| class Builder : virtual public RefCount { |
| public: |
| // Get a snapshot copy of the internal data of the builder. |
| // This causes any internal data structures to be serialized to a new data |
| // object. This data object belongs to the caller and must be properly |
| // disposed of. No changes are made to the builder and any changes to the |
| // data directly do not affect the internal state. To do that a subsequent |
| // call must be made to {@link #SetData(WritableFontData)}. |
| // @return a copy of the internal data of the builder |
| CALLER_ATTACH WritableFontData* Data(); |
| virtual void SetData(ReadableFontData* data); |
| |
| // Note: changed from protected to avoid accessibility error in C++ |
| virtual CALLER_ATTACH FontDataTable* Build(); |
| virtual bool ReadyToBuild(); |
| |
| ReadableFontData* InternalReadData(); |
| WritableFontData* InternalWriteData(); |
| CALLER_ATTACH WritableFontData* InternalNewData(int32_t size); |
| |
| bool data_changed() { return data_changed_; } |
| bool model_changed() { return model_changed_; } |
| bool set_model_changed() { return set_model_changed(true); } |
| bool set_model_changed(bool changed) { |
| bool old = model_changed_; |
| model_changed_ = changed; |
| return old; |
| } |
| |
| protected: |
| explicit Builder(FontDataTableBuilderContainer* container); |
| Builder(FontDataTableBuilderContainer* container, WritableFontData* data); |
| Builder(FontDataTableBuilderContainer* container, ReadableFontData* data); |
| virtual ~Builder(); |
| |
| void Init(FontDataTableBuilderContainer* container); |
| |
| // subclass API |
| virtual void NotifyPostTableBuild(FontDataTable* table); |
| virtual int32_t SubSerialize(WritableFontData* new_data) = 0; |
| virtual bool SubReadyToSerialize() = 0; |
| virtual int32_t SubDataSizeToSerialize() = 0; |
| virtual void SubDataSet() = 0; |
| virtual CALLER_ATTACH FontDataTable* |
| SubBuildTable(ReadableFontData* data) = 0; |
| |
| private: |
| void InternalSetData(WritableFontData* data, bool data_changed); |
| void InternalSetData(ReadableFontData* data, bool data_changed); |
| |
| FontDataTableBuilderContainer* container_; // avoid circular ref-counting |
| WritableFontDataPtr w_data_; |
| ReadableFontDataPtr r_data_; |
| bool model_changed_; |
| bool data_changed_; |
| }; |
| |
| explicit FontDataTable(ReadableFontData* data); |
| virtual ~FontDataTable(); |
| |
| // Get the readable font data for this table. |
| ReadableFontData* ReadFontData(); |
| |
| // Get the length of the data for this table in bytes. This is the full |
| // allocated length of the data and may or may not include any padding. |
| virtual int32_t Length(); |
| |
| // Get the number of bytes of padding used in the table. The padding bytes are |
| // used to align the table length to a 4 byte boundary. |
| virtual int32_t Padding(); |
| |
| // Return the number of bytes of non-padded data in the table. If the padding |
| // is unknown or unknowable then the total number of bytes of data in the |
| // tables is returned. |
| virtual int32_t DataLength(); |
| |
| virtual int32_t Serialize(OutputStream* os); |
| |
| protected: |
| // TODO(arthurhsu): style guide violation: protected member, need refactoring |
| ReadableFontDataPtr data_; |
| }; |
| typedef Ptr<FontDataTable> FontDataTablePtr; |
| typedef Ptr<FontDataTable::Builder> FontDataTableBuilderPtr; |
| |
| } // namespace sfntly |
| |
| #endif // TYPOGRAPHY_FONT_SFNTLY_SRC_SFNTLY_FONT_DATA_TABLE_H_ |