Class: TTFunk::Table::Hhea

Inherits:
TTFunk::Table show all
Defined in:
lib/ttfunk/table/hhea.rb

Overview

Horizontal Header (hhea) table.

Instance Attribute Summary collapse

Attributes inherited from TTFunk::Table

#file, #length, #offset

Class Method Summary collapse

Methods inherited from TTFunk::Table

#exists?, #initialize, #raw, #tag

Constructor Details

This class inherits a constructor from TTFunk::Table

Instance Attribute Details

#advance_width_max ⇒ Integer (readonly)

Maximum advance width value in hmtx table.

Returns:

  • (Integer)
Source Code
lib/ttfunk/table/hhea.rb, line 27
27
def advance_width_max

28
  @advance_width_max

29
end

#ascent ⇒ Integer (readonly)

Typographic ascent.

Returns:

  • (Integer)
Source Code
lib/ttfunk/table/hhea.rb, line 15
15
def ascent

16
  @ascent

17
end

#caret_offset ⇒ Integer (readonly)

Caret offset.

Returns:

  • (Integer)
Source Code
lib/ttfunk/table/hhea.rb, line 66
66
def caret_offset

67
  @caret_offset

68
end

#caret_slope_rise ⇒ Integer (readonly)

Caret slope rise.

Returns:

  • (Integer)
Source Code
lib/ttfunk/table/hhea.rb, line 44
44
def caret_slope_rise

45
  @caret_slope_rise

46
end

#caret_slope_run ⇒ Integer (readonly)

Caret slope run.

Returns:

  • (Integer)
Source Code
lib/ttfunk/table/hhea.rb, line 55
55
def caret_slope_run

56
  @caret_slope_run

57
end

#carot_slope_rise ⇒ Integer (readonly)

Deprecated.

Use #caret_slope_rise instead.

Returns:

  • (Integer)
Source Code
lib/ttfunk/table/hhea.rb, line 49
49
def carot_slope_rise

50
  @caret_slope_rise

51
end

#carot_slope_run ⇒ Integer (readonly)

Deprecated.

Use #caret_slope_run instead.

Returns:

  • (Integer)
Source Code
lib/ttfunk/table/hhea.rb, line 60
60
def carot_slope_run

61
  @caret_slope_run

62
end

#descent ⇒ Integer (readonly)

Typographic descent.

Returns:

  • (Integer)
Source Code
lib/ttfunk/table/hhea.rb, line 19
19
def descent

20
  @descent

21
end

#line_gap ⇒ Integer (readonly)

Typographic line gap.

Returns:

  • (Integer)
Source Code
lib/ttfunk/table/hhea.rb, line 23
23
def line_gap

24
  @line_gap

25
end

#metric_data_format ⇒ Integer (readonly)

Metric data format. 0 for current format.

Returns:

  • (Integer)
Source Code
lib/ttfunk/table/hhea.rb, line 70
70
def metric_data_format

71
  @metric_data_format

72
end

#min_left_side_bearing ⇒ Integer (readonly)

Minimum left sidebearing value in hmtx table for glyphs with contours (empty glyphs should be ignored).

Returns:

  • (Integer)
Source Code
lib/ttfunk/table/hhea.rb, line 32
32
def min_left_side_bearing

33
  @min_left_side_bearing

34
end

#min_right_side_bearing ⇒ Integer (readonly)

Minimum right sidebearing value.

Returns:

  • (Integer)
Source Code
lib/ttfunk/table/hhea.rb, line 36
36
def min_right_side_bearing

37
  @min_right_side_bearing

38
end

#number_of_metrics ⇒ Integer (readonly)

Number of hMetric entries in hmtx table.

Returns:

  • (Integer)
Source Code
lib/ttfunk/table/hhea.rb, line 74
74
def number_of_metrics

75
  @number_of_metrics

76
end

#version ⇒ Integer (readonly)

Table version

Returns:

  • (Integer)
Source Code
lib/ttfunk/table/hhea.rb, line 11
11
def version

12
  @version

13
end

#x_max_extent ⇒ Integer (readonly)

Maximum extent.

Returns:

  • (Integer)
Source Code
lib/ttfunk/table/hhea.rb, line 40
40
def x_max_extent

41
  @x_max_extent

42
end

Class Method Details

.encode(hhea, hmtx, original, mapping) ⇒ String

Encode table.

Parameters:

Returns:

  • (String)
Source Code
lib/ttfunk/table/hhea.rb, line 85
85
def encode(hhea, hmtx, original, mapping)

86
  ''.b.tap do |table|

87
    table << [hhea.version].pack('N')

88
    table << [

89
      hhea.ascent, hhea.descent, hhea.line_gap,

90
      *min_max_values_for(original, mapping),

91
      hhea.caret_slope_rise, hhea.caret_slope_run, hhea.caret_offset,

92
      0, 0, 0, 0, hhea.metric_data_format, hmtx[:number_of_metrics],

93
    ].pack('n*')

94
  end

95
end