From fd92af79d801880faf070c84d0c274081369eb76 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Behdad=20Esfahbod=20=28=D8=A8=D9=87=D8=AF=D8=A7=D8=AF=20?=
 =?UTF-8?q?=D8=A7=D8=B3=D9=81=D9=87=D8=A8=D8=AF=29?= <behdad@behdad.org>
Date: Tue, 20 May 2025 16:55:38 -0600
Subject: [PATCH] [gxvar] Another optimization in computing scalar.

Another ~6% speedup in GoogleSansFlex var drawing.

* src/truetype/ttgxvar.c (ft_var_apply_tuple): Test `ncv` for being zero.
---
 src/truetype/ttgxvar.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/truetype/ttgxvar.c b/src/truetype/ttgxvar.c
index 9f161823c..2939d9526 100644
--- a/src/truetype/ttgxvar.c
+++ b/src/truetype/ttgxvar.c
@@ -1909,6 +1909,13 @@
 
       FT_TRACE6(( "    axis %d coordinate %.5f:\n", i, (double)ncv / 65536 ));
 
+      if ( ncv == 0 )
+      {
+        FT_TRACE6(( "      axis coordinate is zero, stop\n" ));
+        apply = 0;
+        break;
+      }
+
       if ( tuple_coords[i] == ncv )
       {
         FT_TRACE6(( "      tuple coordinate %.5f fits perfectly\n",