Fix unredirection for OpenGL Wine/Proton/Steam games and ignoreance of this setting

window.c: Allow FLIP unredirection for 1x1 windows by handling those with parent rectangles.
window-x11.c: Fix breakage of unredirection in case window mode appears changed or OSD stuff appears shown over game window.
meta-surface-actor-x11.c: Fix ignoreance of "Disable compositing for full-screen windows" setting in Cinnamon Settings app and/or in dconf(-editor).

Author: itz-me-zappex

src/compositor/meta-surface-actor-x11.c

@@ -254,6 +254,9 @@ meta_surface_actor_x11_is_opaque (MetaSurfaceActor *actor)
 gboolean
 meta_surface_actor_x11_should_unredirect (MetaSurfaceActorX11 *self)
 {
+  if (!meta_prefs_get_unredirect_fullscreen_windows ())
+    return FALSE;
+
   MetaWindow *window = self->window;
 
   if (meta_window_requested_dont_bypass_compositor (window))
@@ -277,7 +280,7 @@ meta_surface_actor_x11_should_unredirect (MetaSurfaceActorX11 *self)
   if (meta_window_is_override_redirect (window))
     return TRUE;
 
-  if (self->does_full_damage && meta_prefs_get_unredirect_fullscreen_windows ())
+  if (self->does_full_damage)
     return TRUE;
 
   return FALSE;

src/core/window.c

@@ -1100,25 +1100,30 @@ _meta_window_shared_new (MetaDisplay         *display,
   /* avoid tons of stack updates */
   meta_stack_freeze (window->display->stack);
 
-  window->rect.x = attrs->x;
-  window->rect.y = attrs->y;
-  window->rect.width = attrs->width;
-  window->rect.height = attrs->height;
-
-  /* size_hints are the "request" */
-  window->size_hints.x = attrs->x;
-  window->size_hints.y = attrs->y;
-  window->size_hints.width = attrs->width;
-  window->size_hints.height = attrs->height;
-  /* initialize the remaining size_hints as if size_hints.flags were zero */
-  meta_set_normal_hints (window, NULL);
-
-  /* And this is our unmaximized size */
-  window->saved_rect = window->rect;
-  window->unconstrained_rect = window->rect;
-
-  window->depth = attrs->depth;
-  window->xvisual = attrs->visual;
+  if (attrs->width != 1 &&
+      attrs->height != 1)
+    {
+      window->rect.x = attrs->x;
+      window->rect.y = attrs->y;
+      window->rect.width = attrs->width;
+      window->rect.height = attrs->height;
+
+      /* size_hints are the "request" */
+      window->size_hints.x = attrs->x;
+      window->size_hints.y = attrs->y;
+      window->size_hints.width = attrs->width;
+      window->size_hints.height = attrs->height;
+
+      /* initialize the remaining size_hints as if size_hints.flags were zero */
+      meta_set_normal_hints (window, NULL);
+
+      /* And this is our unmaximized size */
+      window->saved_rect = window->rect;
+      window->unconstrained_rect = window->rect;
+
+      window->depth = attrs->depth;
+      window->xvisual = attrs->visual;
+    }
 
   window->title = NULL;
   window->icon = NULL;

src/x11/window-x11.c

@@ -3817,10 +3817,14 @@ meta_window_x11_configure_notify (MetaWindow      *window,
   g_assert (window->override_redirect);
   g_assert (window->frame == NULL);
 
-  window->rect.x = event->x;
-  window->rect.y = event->y;
-  window->rect.width = event->width;
-  window->rect.height = event->height;
+  if (event->width != 1 &&
+      event->height != 1)
+    {
+      window->rect.x = event->x;
+      window->rect.y = event->y;
+      window->rect.width = event->width;
+      window->rect.height = event->height;
+    }
 
   priv->client_rect = window->rect;
   window->buffer_rect = window->rect;