commit ecbc1abfa84c3076255619b394ad0075de42598e
author Werner Lemberg <wl@gnu.org> Fri Jul 04 06:12:34 2025 +0200
committer Werner Lemberg <wl@gnu.org> Sat Jul 05 14:51:40 2025 +0200
tree 027c07ea1af07cd928b859ecdd339a4b1e3114a3
parent fb6a74269d0dc5156d286fef851cc23cfd62ec56

[cff] Support GPOS kerning.

* src/cff/cffdrivr.c (cff_get_kerning) [TT_CONFIG_OPTION_GPOS_KERNING]: Add
  code similar to the one in `tt_get_kerning`.

src/cff/cffdrivr.c

diff --git a/src/cff/cffdrivr.c b/src/cff/cffdrivr.c
index ec271b7..6f5afea 100644
--- a/src/cff/cffdrivr.c
+++ b/src/cff/cffdrivr.c
@@ -121,7 +121,20 @@
     kerning->y = 0;
 
     if ( sfnt )
-      kerning->x = sfnt->get_kerning( cffface, left_glyph, right_glyph );
+    {
+      /* Use 'kern' table if available since that can be faster; otherwise */
+      /* use GPOS kerning pairs if available.                              */
+      if ( cffface->kern_avail_bits )
+        kerning->x = sfnt->get_kerning( cffface,
+                                        left_glyph,
+                                        right_glyph );
+#ifdef TT_CONFIG_OPTION_GPOS_KERNING
+      else if ( cffface->gpos_kerning_available )
+        kerning->x = sfnt->get_gpos_kerning( cffface,
+                                             left_glyph,
+                                             right_glyph );
+#endif
+    }
 
     return FT_Err_Ok;
   }