third_party/ots/src/metrics.h

   1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef OTS_METRICS_H_
   6 #define OTS_METRICS_H_
   7
   8 #include <new>
   9 #include <utility>
  10 #include <vector>
  11
  12 #include "ots.h"
  13
  14 namespace ots {
  15
  16 struct OpenTypeMetricsHeader {
  17   uint32_t version;
  18   int16_t ascent;
  19   int16_t descent;
  20   int16_t linegap;
  21   uint16_t adv_width_max;
  22   int16_t min_sb1;
  23   int16_t min_sb2;
  24   int16_t max_extent;
  25   int16_t caret_slope_rise;
  26   int16_t caret_slope_run;
  27   int16_t caret_offset;
  28   uint16_t num_metrics;
  29 };
  30
  31 struct OpenTypeMetricsTable {
  32   std::vector<std::pair<uint16_t, int16_t> > entries;
  33   std::vector<int16_t> sbs;
  34 };
  35
  36 bool ParseMetricsHeader(Font *font, Buffer *table,
  37                         OpenTypeMetricsHeader *header);
  38 bool SerialiseMetricsHeader(const ots::Font *font,
  39                             OTSStream *out,
  40                             const OpenTypeMetricsHeader *header);
  41
  42 bool ParseMetricsTable(const ots::Font *font,
  43                        Buffer *table,
  44                        const uint16_t num_glyphs,
  45                        const OpenTypeMetricsHeader *header,
  46                        OpenTypeMetricsTable *metrics);
  47 bool SerialiseMetricsTable(const ots::Font *font,
  48                            OTSStream *out,
  49                            const OpenTypeMetricsTable *metrics);
  50
  51 }  // namespace ots
  52
  53 #endif  // OTS_METRICS_H_
  54