The params keyword is used in two ways: To reference feature parameters and to declare them. A feature params is referenced from a feature block to indicate the specified feature params is available in that feature.
Referencing a feature params:
feature CharacterVariants01_1 cv01 {
params FeatureParams_cv01;
}
feature OpticalSize1 size {
params FeatureParams_size;
}
feature StylisticSet1_1 ss01 {
params FeatureParams_ss01;
}
Declaring feature params:
There are currently three defined feature params:
Optical Size features (size) use the sizeparams:
params FeatureParams_size sizeparams {
designsize 100; // the design size in decipoints
subfamily 3; // serves as an identifier that associates fonts in a subfamily
range 80 120; // represents the recommended usage range (start = exclusive) and (end = inclusive), stored in decipoints
name 1033 "Content"; // The name for the subfamily
}
Stylistic Sets features (ss01-ss20) use the ssetparams:
params FeatureParams_ss01 ssetparams {
name 1033 "Content for Stylisitc Set 1"; // specifies text for a user-interface label
}
Character Variants features (cv01-cv99) use the cvarparams:
params FeatureParams_cv01 cvarparams {
label {
name 1033 "Capital-eng variants"; // specifies text for a user-interface label
}
tooltip {
name 1033 "Select glyph variants for capital eng."; // specifies a tooltip text
}
sampletext {
name 1033 "Content for Sample Text"; // text that illustrates the effect of the feature
}
variant {
name 1033 "Content for Variant 1"; // specifies text for variant 1
name 1033 "Content for Variant 2"; // specifies text for variant 2
name 1033 "Content for Variant 3"; // specifies text for variant 3
}
characters [70 80]; // characters code-points for which glyph variants are provided
}
name
The name keyword requires a language id and text.
Language ID: A full list of supported Windows Language IDs can be found at https://www.microsoft.com/typography/otspec/name.htm. Like many values, the language id can be provided in decimal or hexadecimal notation. For example to use language English - United States, you can provide either $409 or 1033.
Text: The text needs to be enclosed by double quote characters, unless the text uses only the following characters: a-z, A-Z, 0-9. If you want to include a double quote inside the text, you’ll need to add two of them.
Note: The language ID used with the name keyword is not related to the language keyword.
