DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Implementation

Mercurial (239374682969)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155
// Copyright (c) 2018 The OTS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef OTS_STAT_H_
#define OTS_STAT_H_

#include <vector>

#include "ots.h"

namespace ots {

// -----------------------------------------------------------------------------
// OpenTypeSTAT Interface
// -----------------------------------------------------------------------------

class OpenTypeSTAT : public Table {
 public:
  explicit OpenTypeSTAT(Font* font, uint32_t tag)
      : Table(font, tag, tag) { }

  bool Parse(const uint8_t* data, size_t length);
  bool Serialize(OTSStream* out);

 private:
  bool ValidateNameId(uint16_t nameid, bool allowPredefined = true);

  uint16_t majorVersion;
  uint16_t minorVersion;
  uint16_t designAxisSize;
  uint16_t designAxisCount;
  uint32_t designAxesOffset;
  uint16_t axisValueCount;
  uint32_t offsetToAxisValueOffsets;
  uint16_t elidedFallbackNameID;

  struct AxisRecord {
    uint32_t axisTag;
    uint16_t axisNameID;
    uint16_t axisOrdering;
  };
  std::vector<AxisRecord> designAxes;

  typedef int32_t Fixed; /* 16.16 fixed-point value */

  struct AxisValueFormat1 {
    uint16_t axisIndex;
    uint16_t flags;
    uint16_t valueNameID;
    Fixed    value;
    static size_t Length() {
      return 3 * sizeof(uint16_t) + sizeof(Fixed);
    }
  };

  struct AxisValueFormat2 {
    uint16_t axisIndex;
    uint16_t flags;
    uint16_t valueNameID;
    Fixed    nominalValue;
    Fixed    rangeMinValue;
    Fixed    rangeMaxValue;
    static size_t Length() {
      return 3 * sizeof(uint16_t) + 3 * sizeof(Fixed);
    }
  };

  struct AxisValueFormat3 {
    uint16_t axisIndex;
    uint16_t flags;
    uint16_t valueNameID;
    Fixed    value;
    Fixed    linkedValue;
    static size_t Length() {
      return 3 * sizeof(uint16_t) + 2 * sizeof(Fixed);
    }
  };

  struct AxisValueFormat4 {
    uint16_t axisCount;
    uint16_t flags;
    uint16_t valueNameID;
    struct AxisValue {
      uint16_t axisIndex;
      Fixed    value;
    };
    std::vector<AxisValue> axisValues;
    size_t Length() const {
      return 3 * sizeof(uint16_t) + axisValues.size() * (sizeof(uint16_t) + sizeof(Fixed));
    }
  };

  struct AxisValueRecord {
    uint16_t format;
    union {
      AxisValueFormat1 format1;
      AxisValueFormat2 format2;
      AxisValueFormat3 format3;
      AxisValueFormat4 format4;
    };
    explicit AxisValueRecord(uint16_t format_)
      : format(format_)
    {
      if (format == 4) {
        new (&this->format4) AxisValueFormat4();
      }
    }
    AxisValueRecord(const AxisValueRecord& other_)
      : format(other_.format)
    {
      switch (format) {
      case 1:
        format1 = other_.format1;
        break;
      case 2:
        format2 = other_.format2;
        break;
      case 3:
        format3 = other_.format3;
        break;
      case 4:
        new (&this->format4) AxisValueFormat4();
        format4 = other_.format4;
        break;
      }
    }
    ~AxisValueRecord() {
      if (format == 4) {
        this->format4.~AxisValueFormat4();
      }
    }
    uint32_t Length() const {
      switch (format) {
      case 1:
        return sizeof(uint16_t) + format1.Length();
      case 2:
        return sizeof(uint16_t) + format2.Length();
      case 3:
        return sizeof(uint16_t) + format3.Length();
      case 4:
        return sizeof(uint16_t) + format4.Length();
      default:
        // can't happen
        return 0;
      }
    }
  };

  std::vector<AxisValueRecord> axisValues;
};

}  // namespace ots

#endif  // OTS_STAT_H_