ui: associate GL context outside of display listener registration

Consoles can have an associated GL context, without listeners (they may
be added or removed later on).

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>

ui/console.c

@@ -1465,8 +1465,11 @@ void register_displaychangelistener(DisplayChangeListener *dcl)
 
     assert(!dcl->ds);
 
-    if (dcl->ops->dpy_gl_ctx_create) {
-        qemu_console_set_display_gl_ctx(dcl->con, dcl);
+    if (dcl->con && dcl->con->gl &&
+        dcl->con->gl != dcl) {
+        error_report("Display %s is incompatible with the GL context",
+                     dcl->ops->dpy_name);
+        exit(1);
     }
 
     if (dcl->con) {

ui/egl-headless.c

@@ -197,6 +197,7 @@ static void egl_headless_init(DisplayState *ds, DisplayOptions *opts)
         edpy->dcl.con = con;
         edpy->dcl.ops = &egl_ops;
         edpy->gls = qemu_gl_init_shader();
+        qemu_console_set_display_gl_ctx(con, &edpy->dcl);
         register_displaychangelistener(&edpy->dcl);
     }
 }

ui/gtk.c

@@ -2083,6 +2083,9 @@ static GSList *gd_vc_gfx_init(GtkDisplayState *s, VirtualConsole *vc,
     vc->gfx.kbd = qkbd_state_init(con);
     vc->gfx.dcl.con = con;
 
+    if (display_opengl) {
+        qemu_console_set_display_gl_ctx(con, &vc->gfx.dcl);
+    }
     register_displaychangelistener(&vc->gfx.dcl);
 
     gd_connect_vc_gfx_signals(vc);

ui/sdl2.c

@@ -866,6 +866,9 @@ static void sdl2_display_init(DisplayState *ds, DisplayOptions *o)
 #endif
         sdl2_console[i].dcl.con = con;
         sdl2_console[i].kbd = qkbd_state_init(con);
+        if (display_opengl) {
+            qemu_console_set_display_gl_ctx(con, &sdl2_console[i].dcl);
+        }
         register_displaychangelistener(&sdl2_console[i].dcl);
 
 #if defined(SDL_VIDEO_DRIVER_WINDOWS) || defined(SDL_VIDEO_DRIVER_X11)

ui/spice-display.c

@@ -1156,6 +1156,9 @@ static void qemu_spice_display_init_one(QemuConsole *con)
 
     qemu_spice_create_host_memslot(ssd);
 
+    if (spice_opengl) {
+        qemu_console_set_display_gl_ctx(con, &ssd->dcl);
+    }
     register_displaychangelistener(&ssd->dcl);
 }