1 files changed, 10 insertions, 5 deletions

diff --git a/video/out/opengl/osd.c b/video/out/opengl/osd.c
index 2678e12774..7030e8d8f4 100644
--- a/video/out/opengl/osd.c
+++ b/video/out/opengl/osd.c
@@ -66,7 +66,7 @@ struct mpgl_osd {
     struct mpgl_osd_part *parts[MAX_OSD_PARTS];
     const struct ra_format *fmt_table[SUBBITMAP_COUNT];
     bool formats[SUBBITMAP_COUNT];
-    int64_t change_counter;
+    bool change_flag; // for reporting to API user only
     // temporary
     int stereo_mode;
     struct mp_osd_res osd_res;
@@ -81,6 +81,7 @@ struct mpgl_osd *mpgl_osd_init(struct ra *ra, struct mp_log *log,
         .log = log,
         .osd = osd,
         .ra = ra,
+        .change_flag = true,
         .scratch = talloc_zero_size(ctx, 1),
     };
 
@@ -189,7 +190,7 @@ static void gen_osd_cb(void *pctx, struct sub_bitmaps *imgs)
             ok = false;
 
         osd->change_id = imgs->change_id;
-        ctx->change_counter += 1;
+        ctx->change_flag = true;
     }
     osd->num_subparts = ok ? imgs->num_parts : 0;
 
@@ -310,6 +311,8 @@ void mpgl_osd_draw_finish(struct mpgl_osd *ctx, int index,
     gl_sc_blend(sc, factors[0], factors[1], factors[2], factors[3]);
 
     gl_sc_dispatch_draw(sc, target.tex, part->vertices, part->num_vertices);
+
+    ctx->change_flag = false;
 }
 
 static void set_res(struct mpgl_osd *ctx, struct mp_osd_res res, int stereo_mode)
@@ -338,7 +341,7 @@ void mpgl_osd_generate(struct mpgl_osd *ctx, struct mp_osd_res res, double pts,
     for (int n = 0; n < MAX_OSD_PARTS; n++) {
         struct mpgl_osd_part *part = ctx->parts[n];
         if (part->num_subparts !=  part->prev_num_subparts)
-            ctx->change_counter += 1;
+            ctx->change_flag = true;
         part->prev_num_subparts = part->num_subparts;
     }
 }
@@ -350,7 +353,9 @@ void mpgl_osd_resize(struct mpgl_osd *ctx, struct mp_osd_res res, int stereo_mod
     osd_resize(ctx->osd, ctx->osd_res);
 }
 
-int64_t mpgl_get_change_counter(struct mpgl_osd *ctx)
+bool mpgl_osd_check_change(struct mpgl_osd *ctx, struct mp_osd_res *res,
+                           double pts)
 {
-    return ctx->change_counter;
+    mpgl_osd_generate(ctx, *res, pts, 0, 0);
+    return ctx->change_flag;
 }