Fix \fs+ and \fs-

The argument is a relative amount. The unit is: \fs+1 = +10%.

diff --git a/libass/ass_parse.c b/libass/ass_parse.c
index d2feff3b0aab659963d902545d202647b549ee9b..be22a087c690c209e9e9f9d369517795e3915b79 100644 (file)
--- a/libass/ass_parse.c
+++ b/libass/ass_parse.c
@@ -380,7 +380,7 @@ char *parse_tag(ASS_Renderer *render_priv, char *p, double pwr)
     } else if (mystrcmp(&p, "fs+")) {
         double val;
         if (mystrtod(&p, &val)) {
-            val = render_priv->state.font_size + pwr * val;
+            val = render_priv->state.font_size * (1 + pwr * val / 10);
         } else
             val = render_priv->state.style->FontSize;
         if (render_priv->state.font)
@@ -388,7 +388,7 @@ char *parse_tag(ASS_Renderer *render_priv, char *p, double pwr)
     } else if (mystrcmp(&p, "fs-")) {
         double val;
         if (mystrtod(&p, &val))
-            val = render_priv->state.font_size - pwr * val;
+            val = render_priv->state.font_size * (1 - pwr * val / 10);
         else
             val = render_priv->state.style->FontSize;
         if (render_priv->state.font)