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Simon Cozens 2021-03-03 13:33:58 +00:00
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Doc/source/varLib/index.rst
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@ -1,17 +1,18 @@
##########################
OpenType Variation Support
##########################
##################################
varLib: OpenType Variation Support
##################################
The `fontTools.varLib` package contains a number of classes and routines
The ``fontTools.varLib`` package contains a number of classes and routines
for handling, building and interpolating variable font data. These routines
rely on a common set of concepts, many of which are equivalent to concepts
in the OpenType Specification, but some of which are unique to `varLib`.
in the OpenType Specification, but some of which are unique to ``varLib``.
Terminology
-----------
axis
"A designer-determined variable in a font face design that can be used to derive multiple, variant designs within a family." (OpenType Specification)
"A designer-determined variable in a font face design that can be used to
derive multiple, variant designs within a family." (OpenType Specification)
An axis has a minimum value, a maximum value and a default value.
designspace
@ -70,7 +71,7 @@ support
tuple ``(min, peak, max)``.
box
`varLib` uses the term "box" to denote the minimum and maximum "corners" of
``varLib`` uses the term "box" to denote the minimum and maximum "corners" of
a support, ignoring its peak value.
delta