[read-fonts] parse cvar table (#833)

* [read-fonts] parse cvar table * impl cvar, move shared gvar code * add raw tuple test and trim test fonts * distinct types for glyph and CVT deltas * review feedback - fix comment - use proper covariant type for PhantomData
googlefonts · Mar 14, 2024 · a719caa · a719caa
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diff --git a/font-test-data/src/lib.rs b/font-test-data/src/lib.rs
@@ -47,6 +47,8 @@ pub static COLRV0V1: &[u8] = include_bytes!("../test_data/ttf/test_glyphs-glyf_c
 pub static COLRV0V1_VARIABLE: &[u8] =
     include_bytes!("../test_data/ttf/test_glyphs-glyf_colr_1_variable.ttf");
 
+pub static CVAR: &[u8] = include_bytes!("../test_data/ttf/cvar.ttf");
+
 pub mod closure {
     pub static SIMPLE: &[u8] = include_bytes!("../test_data/ttf/simple_closure.ttf");
     pub static SIMPLE_GLYPHS: &str = include_str!("../test_data/fea/simple_closure_glyphs.txt");

diff --git a/font-test-data/test_data/ttf/cvar.ttf b/font-test-data/test_data/ttf/cvar.ttf