commit 5be6e5dd577b8680ee5ffdedeec93638dffb5547
author Behdad Esfahbod <behdad@behdad.org> Mon Jun 27 15:22:16 2022 -0600
committer Behdad Esfahbod <behdad@behdad.org> Mon Jun 27 15:22:16 2022 -0600
tree 2b692f2c5addd98f9656607ad21618a677bdbcc6
parent 57519b532da6fb1ef2442eb1eda26192f9617552

[gvar] Rewrite linear interpolation

src/hb-ot-var-gvar-table.hh

diff --git a/src/hb-ot-var-gvar-table.hh b/src/hb-ot-var-gvar-table.hh
index e9a3ccf..8165895 100644
--- a/src/hb-ot-var-gvar-table.hh
+++ b/src/hb-ot-var-gvar-table.hh
@@ -536,7 +536,7 @@
 
       /* linear interpolation */
       float r = (target_val - prev_val) / (next_val - prev_val);
-      return (1.f - r) * prev_delta + r * next_delta;
+      return prev_delta + r * (next_delta - prev_delta);
     }
 
     static unsigned int next_index (unsigned int i, unsigned int start, unsigned int end)