core: simplify OSD capability handling, remove VFCAP_OSD

VFCAP_OSD was used to determine at runtime whether the VO supports OSD
rendering. This was mostly unused. vo_direct3d had an option to disable
OSD (was supposed to allow to force auto-insertion of vf_ass, but we
removed that anyway). vo_opengl_old could disable OSD rendering when a
very old OpenGL version was detected, and had an option to explicitly
disable it as well.

Remove VFCAP_OSD from everything (and some associated logic). Now the
vo_driver.draw_osd callback can be set to NULL to indicate missing OSD
support (important so that vo_null etc. don't single-step on OSD
redraw), and if OSD support depends on runtime support, the VO's
draw_osd should just do nothing if OSD is not available.

Also, do not access vo->want_redraw directly. Change the want_redraw
reset logic for this purpose, too. (Probably unneeded, vo_flip_page
resets it already.)

1 files changed, 5 insertions, 3 deletions

diff --git a/video/filter/vf_pp.c b/video/filter/vf_pp.c
index 157dc3e068..372fc81cad 100644
--- a/video/filter/vf_pp.c
+++ b/video/filter/vf_pp.c
@@ -75,8 +75,11 @@ static int query_format(struct vf_instance *vf, unsigned int fmt){
     case IMGFMT_444P:
     case IMGFMT_422P:
     case IMGFMT_420P:
-    case IMGFMT_411P:
-	return vf_next_query_format(vf,fmt);
+    case IMGFMT_411P: ;
+	int caps = vf_next_query_format(vf,fmt);
+        if (caps)
+            caps |= VFCAP_POSTPROC;
+        return caps;
     }
     return 0;
 }
@@ -146,7 +149,6 @@ static int vf_open(vf_instance_t *vf, char *args){
     vf->config=config;
     vf->filter=filter;
     vf->uninit=uninit;
-    vf->default_caps=VFCAP_POSTPROC;
     vf->priv=malloc(sizeof(struct vf_priv_s));
     vf->priv->context=NULL;