1 /* 2 * Copyright 2011 Google Inc. All Rights Reserved. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef SFNTLY_CPP_SRC_SFNTLY_TABLE_SUBTABLE_H_ 18 #define SFNTLY_CPP_SRC_SFNTLY_TABLE_SUBTABLE_H_ 19 20 #include "sfntly/table/font_data_table.h" 21 22 namespace sfntly { 23 24 // An abstract base class for subtables. Subtables are smaller tables nested 25 // within other tables and don't have an entry in the main font index. Examples 26 // of these are the CMap subtables within CMap table (cmap) or a glyph within 27 // the glyph table (glyf). 28 class SubTable : public FontDataTable { 29 public: 30 class Builder : public FontDataTable::Builder { 31 public: 32 virtual ~Builder(); 33 34 protected: 35 // @param data the data for the subtable being built 36 // @param master_data the data for the full table 37 Builder(int32_t data_size); 38 Builder(WritableFontData* data, ReadableFontData* master_data); 39 Builder(ReadableFontData* data, ReadableFontData* master_data); 40 explicit Builder(WritableFontData* data); 41 explicit Builder(ReadableFontData* data); 42 43 ReadableFontData* master_read_data() { return master_data_; } 44 45 private: 46 ReadableFontDataPtr master_data_; 47 }; 48 49 virtual ~SubTable(); 50 virtual int32_t Padding() { return padding_; } 51 52 // Sets the amount of padding that is part of the data being used by this 53 // subtable. 54 void set_padding(int32_t padding) { padding_ = padding; } 55 56 protected: 57 SubTable(ReadableFontData* data, ReadableFontData* master_data); 58 59 // Note: constructor refactored in C++ to avoid heavy lifting. 60 // caller need to do data->Slice(offset, length) beforehand. 61 explicit SubTable(ReadableFontData* data); 62 63 ReadableFontData* master_read_data() { return master_data_; } 64 65 private: 66 // The data for the whole table in which this subtable is contained. 67 ReadableFontDataPtr master_data_; 68 int32_t padding_; 69 }; 70 71 } // namespace sfntly 72 73 #endif // SFNTLY_CPP_SRC_SFNTLY_TABLE_SUBTABLE_H_ 74
