From: Grigori Goronzy <greg@blackbox>
Date: Tue, 30 Jun 2009 11:10:03 +0000 (+0200)
Subject: Fix karaoke (\kf) timing
X-Git-Tag: 0.9.7~74
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=1023e87ea247c893c0483c508dd6c59e3680b2d7;p=libass

Fix karaoke (\kf) timing

The timing for the \kf karaoke which gradually fills the character from
left to right, uses clipping and isn't aware of subpixel accuracy.  This
is simply fixed by casting these value to int.
---

diff --git a/libass/ass_render.c b/libass/ass_render.c
index df695ea..fd790f7 100644
--- a/libass/ass_render.c
+++ b/libass/ass_render.c
@@ -2142,8 +2142,8 @@ static void process_karaoke_effects(ass_renderer_t *render_priv)
                 x_start = 1000000;
                 x_end = -1000000;
                 for (cur2 = s1; cur2 <= e1; ++cur2) {
-                    x_start = FFMIN(x_start, cur2->bbox.xMin + cur2->pos.x);
-                    x_end = FFMAX(x_end, cur2->bbox.xMax + cur2->pos.x);
+                    x_start = FFMIN(x_start, d6_to_int(cur2->bbox.xMin + cur2->pos.x));
+                    x_end = FFMAX(x_end, d6_to_int(cur2->bbox.xMax + cur2->pos.x));
                 }
 
                 dt = (tm_current - tm_start);
@@ -2164,7 +2164,7 @@ static void process_karaoke_effects(ass_renderer_t *render_priv)
 
                 for (cur2 = s1; cur2 <= e1; ++cur2) {
                     cur2->effect_type = s1->effect_type;
-                    cur2->effect_timing = x - cur2->pos.x;
+                    cur2->effect_timing = x - d6_to_int(cur2->pos.x);
                 }
             }
         }