vo_opengl: draw subtitles directly onto the video

This has a number of user-visible changes:

1. A new flag blend-subtitles (default on for opengl-hq) to control this
   behavior.

2. The OSD itself will not be color managed or affected by
   gamma controls. To get subtitle CMS/gamma, blend-subtitles must be
   used.

3. When enabled, this will make subtitles be cleanly interpolated by
   :interpolation, and also dithered etc. (just like the normal output).

Signed-off-by: wm4 <wm4@nowhere>

1 files changed, 2 insertions, 2 deletions

diff --git a/video/out/gl_osd.c b/video/out/gl_osd.c
index 88a7e938fb..9ec4350a03 100644
--- a/video/out/gl_osd.c
+++ b/video/out/gl_osd.c
@@ -401,7 +401,7 @@ struct gl_vao *mpgl_osd_get_vao(struct mpgl_osd *ctx)
 }
 
 void mpgl_osd_generate(struct mpgl_osd *ctx, struct mp_osd_res res, double pts,
-                       int stereo_mode)
+                       int stereo_mode, int draw_flags)
 {
     for (int n = 0; n < MAX_OSD_PARTS; n++)
         ctx->parts[n]->num_subparts = 0;
@@ -413,6 +413,6 @@ void mpgl_osd_generate(struct mpgl_osd *ctx, struct mp_osd_res res, double pts,
     ctx->display_size[0] = s_res.w = s_res.w / div[0];
     ctx->display_size[1] = s_res.h = s_res.h / div[1];
 
-    osd_draw(ctx->osd, s_res, pts, 0, ctx->formats, gen_osd_cb, ctx);
+    osd_draw(ctx->osd, s_res, pts, draw_flags, ctx->formats, gen_osd_cb, ctx);
     ctx->stereo_mode = stereo_mode;
 }