video/out: introduce vo_control for gl_common based VOs

Instead of having separate callbacks for each backend-handled feature
(like MPGLContext.fullscreen, MPGLContext.border, etc.), pass the
VOCTRL responsible for this directly to the backend. This allows
removing a bunch of callbacks, that currently must be set even for
optional/lesser features (like VOCTRL_BORDER).

This requires changes to all VOs using gl_common, as well as all
backends that support gl_common.

Also introduce VOCTRL_CHECK_EVENTS. vo.check_events is now optional.
VO backends can use VOCTRL_CHECK_EVENTS instead to implementing
check_events. This has the advantage that the event handling code in
VOs doesn't have to be duplicated if vo_control() is used.

1 files changed, 1 insertions, 8 deletions

diff --git a/video/out/gl_common.h b/video/out/gl_common.h
index 1956b73616..8a627963ed 100644
--- a/video/out/gl_common.h
+++ b/video/out/gl_common.h
@@ -108,9 +108,9 @@ typedef struct MPGLContext {
 
     void (*swapGlBuffers)(struct MPGLContext *);
     int (*check_events)(struct vo *vo);
-    void (*fullscreen)(struct vo *vo);
     int (*vo_init)(struct vo *vo);
     void (*vo_uninit)(struct vo *vo);
+    int (*vo_control)(struct vo *vo, int *events, int request, void *arg);
     void (*releaseGlContext)(struct MPGLContext *);
     void (*set_current)(struct MPGLContext *, bool current);
 
@@ -124,13 +124,6 @@ typedef struct MPGLContext {
     bool (*config_window)(struct MPGLContext *ctx, uint32_t d_width,
                           uint32_t d_height, uint32_t flags);
 
-    // optional
-    void (*pause)(struct vo *vo);
-    void (*resume)(struct vo *vo);
-    void (*ontop)(struct vo *vo);
-    void (*border)(struct vo *vo);
-    void (*update_xinerama_info)(struct vo *vo);
-
     // An optional function to register a resize callback in the backend that
     // can be called on separate thread to handle resize events immediately
     // (without waiting for vo_check_events, which will come later for the