| /* |
| * 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_HORIZONTAL_METRICS_TABLE_H_ |
| #define TYPOGRAPHY_FONT_SFNTLY_SRC_SFNTLY_HORIZONTAL_METRICS_TABLE_H_ |
| |
| #include "sfntly/table.h" |
| |
| namespace sfntly { |
| |
| class HorizontalMetricsTable : public Table, |
| public RefCounted<HorizontalMetricsTable> { |
| private: |
| struct Offset { |
| enum { |
| // hMetrics |
| kHMetricsStart = 0, |
| kHMetricsSize = 4, |
| |
| // Offset within an hMetric |
| kHMetricsAdvanceWidth = 0, |
| kHMetricsLeftSideBearing = 2, |
| |
| kLeftSideBearingSize = 2 |
| }; |
| }; |
| |
| private: |
| HorizontalMetricsTable(Header* header, ReadableFontData* data); |
| HorizontalMetricsTable(Header* header, ReadableFontData* data, |
| int32_t num_hmetrics, int32_t num_glyphs); |
| |
| public: // class is final, no virtual functions unless inherited from parent. |
| virtual ~HorizontalMetricsTable(); |
| int32_t numberOfHMetrics(); |
| int32_t numberOfLSBs(); |
| int32_t hMetricAdvanceWidth(int32_t entry); |
| int32_t hMetricLSB(int32_t entry); |
| int32_t lsbTableEntry(int32_t entry); |
| int32_t advanceWidth(int32_t glyph_id); |
| |
| public: |
| class Builder : public Table::TableBasedTableBuilder, |
| public RefCounted<Builder> { |
| public: |
| // Constructor scope altered to public because C++ does not allow base |
| // class to instantiate derived class with protected constructors. |
| Builder(FontDataTableBuilderContainer* font_builder, Header* header, |
| WritableFontData* data); |
| Builder(FontDataTableBuilderContainer* font_builder, Header* header, |
| ReadableFontData* data); |
| virtual ~Builder(); |
| void init(); |
| |
| virtual CALLER_ATTACH FontDataTable* subBuildTable(ReadableFontData* data); |
| void setNumberOfHMetrics(int32_t num_hmetrics); |
| void setNumGlyphs(int32_t num_glyphs); |
| |
| private: |
| int32_t num_hmetrics_; |
| int32_t num_glyphs_; |
| }; |
| |
| private: |
| int32_t num_hmetrics_; |
| int32_t num_glyphs_; |
| }; |
| typedef Ptr<HorizontalMetricsTable> HorizontalMetricsTablePtr; |
| typedef Ptr<HorizontalMetricsTable::Builder> HorizontalMetricsTableBuilderPtr; |
| |
| } // namespace sfntly |
| |
| #endif // TYPOGRAPHY_FONT_SFNTLY_SRC_SFNTLY_HORIZONTAL_METRICS_TABLE_H_ |