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/*
* 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 SFNTLY_CPP_SRC_SFNTLY_TABLE_SUBTABLE_H_
#define SFNTLY_CPP_SRC_SFNTLY_TABLE_SUBTABLE_H_
#include "sfntly/table/font_data_table.h"
namespace sfntly {
// An abstract base class for subtables. Subtables are smaller tables nested
// within other tables and don't have an entry in the main font index. Examples
// of these are the CMap subtables within CMap table (cmap) or a glyph within
// the glyph table (glyf).
class SubTable : public FontDataTable {
public:
class Builder : public FontDataTable::Builder {
public:
virtual ~Builder();
protected:
// @param data the data for the subtable being built
// @param master_data the data for the full table
Builder(int32_t data_size);
Builder(WritableFontData* data, ReadableFontData* master_data);
Builder(ReadableFontData* data, ReadableFontData* master_data);
explicit Builder(WritableFontData* data);
explicit Builder(ReadableFontData* data);
ReadableFontData* master_read_data() { return master_data_; }
private:
ReadableFontDataPtr master_data_;
};
virtual ~SubTable();
virtual int32_t Padding() { return padding_; }
// Sets the amount of padding that is part of the data being used by this
// subtable.
void set_padding(int32_t padding) { padding_ = padding; }
protected:
SubTable(ReadableFontData* data, ReadableFontData* master_data);
// Note: constructor refactored in C++ to avoid heavy lifting.
// caller need to do data->Slice(offset, length) beforehand.
explicit SubTable(ReadableFontData* data);
ReadableFontData* master_read_data() { return master_data_; }
private:
// The data for the whole table in which this subtable is contained.
ReadableFontDataPtr master_data_;
int32_t padding_;
};
} // namespace sfntly
#endif // SFNTLY_CPP_SRC_SFNTLY_TABLE_SUBTABLE_H_
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