[aat] Add Class subtable thingy
From old 'mort' table.
diff --git a/src/hb-aat-layout-common-private.hh b/src/hb-aat-layout-common-private.hh
index c305868..4b96ee6 100644
--- a/src/hb-aat-layout-common-private.hh
+++ b/src/hb-aat-layout-common-private.hh
@@ -424,6 +424,30 @@
};
+struct Class
+{
+ inline unsigned int get_class (hb_codepoint_t glyph_id) const
+ {
+ return firstGlyph <= glyph_id && glyph_id - firstGlyph < glyphCount ? classArrayZ[glyph_id - firstGlyph] : 1;
+ }
+
+ inline bool sanitize (hb_sanitize_context_t *c) const
+ {
+ TRACE_SANITIZE (this);
+ return_trace (c->check_struct (this) && classArrayZ.sanitize (c, glyphCount));
+ }
+
+ protected:
+ GlyphID firstGlyph; /* First glyph index included in the trimmed array. */
+ HBUINT16 glyphCount; /* Total number of glyphs (equivalent to the last
+ * glyph minus the value of firstGlyph plus 1). */
+ UnsizedArrayOf<HBUINT8>
+ classArrayZ; /* The class codes (indexed by glyph index minus
+ * firstGlyph). */
+ public:
+ DEFINE_SIZE_ARRAY (4, classArrayZ);
+};
+
} /* namespace AAT */
