/*
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* Copyright 2011 Google Inc. All Rights Reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef SFNTLY_CPP_SRC_SFNTLY_TABLE_SUBTABLE_H_
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#define SFNTLY_CPP_SRC_SFNTLY_TABLE_SUBTABLE_H_
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#include "sfntly/table/font_data_table.h"
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namespace sfntly {
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// An abstract base class for subtables. Subtables are smaller tables nested
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// within other tables and don't have an entry in the main font index. Examples
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// of these are the CMap subtables within CMap table (cmap) or a glyph within
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// the glyph table (glyf).
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class SubTable : public FontDataTable {
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public:
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class Builder : public FontDataTable::Builder {
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public:
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virtual ~Builder();
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protected:
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// @param data the data for the subtable being built
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// @param master_data the data for the full table
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Builder(int32_t data_size);
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Builder(WritableFontData* data, ReadableFontData* master_data);
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Builder(ReadableFontData* data, ReadableFontData* master_data);
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explicit Builder(WritableFontData* data);
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explicit Builder(ReadableFontData* data);
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ReadableFontData* master_read_data() { return master_data_; }
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private:
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ReadableFontDataPtr master_data_;
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};
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virtual ~SubTable();
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virtual int32_t Padding() { return padding_; }
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// Sets the amount of padding that is part of the data being used by this
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// subtable.
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void set_padding(int32_t padding) { padding_ = padding; }
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protected:
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SubTable(ReadableFontData* data, ReadableFontData* master_data);
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// Note: constructor refactored in C++ to avoid heavy lifting.
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// caller need to do data->Slice(offset, length) beforehand.
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explicit SubTable(ReadableFontData* data);
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ReadableFontData* master_read_data() { return master_data_; }
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private:
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// The data for the whole table in which this subtable is contained.
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ReadableFontDataPtr master_data_;
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int32_t padding_;
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};
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} // namespace sfntly
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#endif // SFNTLY_CPP_SRC_SFNTLY_TABLE_SUBTABLE_H_
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