Better round positions during scaling

Fixes https://github.com/harfbuzz/harfbuzz/issues/3274
3 years ago · bbaccf23d9
parent 52ccdc78e6
commit bbaccf23d9
1 changed files with 1 additions and 3 deletions
--- a/src/hb-font.hh
+++ b/src/hb-font.hh
@ -620,9 +620,7 @@ struct hb_font_t
  }

  hb_position_t em_mult (int16_t v, int64_t mult)
-  {
-    return (hb_position_t) ((v * mult) >> 16);
-  }
+  { return (hb_position_t) ((v * mult + 32768) >> 16); }
  hb_position_t em_scalef (float v, int scale)
  { return (hb_position_t) roundf (v * scale / face->get_upem ()); }
  float em_fscale (int16_t v, int scale)