Class: HarfBuzz::Variation

Inherits:
Object
  • Object
show all
Defined in:
lib/harfbuzz/variation.rb

Overview

Represents an OpenType variation axis value (e.g., "wght=700")

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(struct) ⇒ Variation

Returns a new instance of Variation.



6
7
8
 
# File 'lib/harfbuzz/variation.rb', line 6

def initialize(struct)
  @struct = struct
end

Class Method Details

.from_string(str) ⇒ Variation

Parses a variation string such as "wght=700" or "ital=1"

Parameters:

  • str (String) —

    Variation string

Returns:

Raises:



24
25
26
27
28
29
30
 
# File 'lib/harfbuzz/variation.rb', line 24

def self.from_string(str)
  struct = C::HbVariationT.new
  result = C.hb_variation_from_string(str, str.bytesize, struct)
  raise VariationParseError, "Invalid variation string: #{str.inspect}" if result.zero?

  new(struct)
end

Instance Method Details

#inspect ⇒ Object 



45
46
47
 
# File 'lib/harfbuzz/variation.rb', line 45

def inspect
  "#<HarfBuzz::Variation #{to_s}>"
end

#tag ⇒ Integer

Returns Variation axis tag as uint32.

Returns:

  • (Integer) —

    Variation axis tag as uint32



11
12
13
 
# File 'lib/harfbuzz/variation.rb', line 11

def tag
  @struct[:tag]
end

#to_s ⇒ String

Returns Variation string representation.

Returns:

  • (String) —

    Variation string representation



39
40
41
42
43
 
# File 'lib/harfbuzz/variation.rb', line 39

def to_s
  buf = FFI::MemoryPointer.new(:char, 64)
  C.hb_variation_to_string(@struct, buf, 64)
  buf.read_string
end

#to_struct ⇒ C::HbVariationT

Returns the FFI struct for passing to C functions

Returns:



34
35
36
 
# File 'lib/harfbuzz/variation.rb', line 34

def to_struct
  @struct
end

#value ⇒ Float

Returns Variation axis value.

Returns:

  • (Float) —

    Variation axis value



16
17
18
 
# File 'lib/harfbuzz/variation.rb', line 16

def value
  @struct[:value]
end