sub: add function to draw OSD into an image

The osd_draw_on_image() function renders the full OSD into the provided
image.

It uses the mp_draw_sub_bitmaps() function added in the previous commit
to do the actual work.

1 files changed, 6 insertions, 0 deletions

diff --git a/sub/sub.h b/sub/sub.h
index 649f196414..cc59077011 100644
--- a/sub/sub.h
+++ b/sub/sub.h
@@ -238,6 +238,12 @@ bool osd_draw_sub(struct osd_state *osd, struct sub_bitmaps *out_imgs,
                   struct sub_render_params *sub_params,
                   const bool formats[SUBBITMAP_COUNT]);
 
+struct mp_image;
+struct mp_csp_details;
+bool osd_draw_on_image(struct osd_state *osd, struct mp_image *dest,
+                       struct mp_csp_details *dest_csp,
+                       struct sub_render_params *sub_params);
+
 bool sub_bitmaps_bb(struct sub_bitmaps *imgs, int *x1, int *y1,
                     int *x2, int *y2);