sub: add cache to mp_draw_sub_bitmaps()

This caches scaled RGBA sub-bitmaps.

1 files changed, 3 insertions, 1 deletions

diff --git a/sub/sub.h b/sub/sub.h
index ecfd0c40cc..494b84379b 100644
--- a/sub/sub.h
+++ b/sub/sub.h
@@ -106,7 +106,6 @@ struct osd_object {
 
     // caches for OSD conversion (internal to render_object())
     struct osd_conv_cache *cache[OSD_CONV_CACHE_MAX];
-
     struct sub_bitmaps cached;
 
     // VO cache state
@@ -138,6 +137,9 @@ struct osd_state {
 
     struct MPOpts *opts;
 
+    // Internal to sub.c
+    struct mp_draw_sub_cache *draw_cache;
+
     // Internally used by osd_libass.c
     struct ass_renderer *osd_render;
     struct ass_library *osd_ass_library;