[metacity] xrender: simplify determine_mode

[Alberts Muktupāvels <muktupavels src gnome org>]

commit 142778a2103bc342acd9bd5ff89a751c40e7e5c2
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Sat Sep 21 23:01:26 2019 +0300

    xrender: simplify determine_mode

 src/compositor/meta-compositor-xrender.c | 22 ++++++----------------
 1 file changed, 6 insertions(+), 16 deletions(-)
---
diff --git a/src/compositor/meta-compositor-xrender.c b/src/compositor/meta-compositor-xrender.c
index 7a7fe49d..d49f4504 100644
--- a/src/compositor/meta-compositor-xrender.c
+++ b/src/compositor/meta-compositor-xrender.c
@@ -1918,12 +1918,6 @@ determine_mode (MetaCompositorXRender *xrender,
   MetaDisplay *display = meta_compositor_get_display (compositor);
   Display *xdisplay = meta_display_get_xdisplay (display);
 
-  if (cw->alpha_pict)
-    {
-      XRenderFreePicture (xdisplay, cw->alpha_pict);
-      cw->alpha_pict = None;
-    }
-
   format = XRenderFindVisualFormat (xdisplay, get_toplevel_xvisual (cw->window));
 
   if ((format && format->type == PictTypeDirect && format->direct.alphaMask)
@@ -1931,16 +1925,6 @@ determine_mode (MetaCompositorXRender *xrender,
     cw->mode = WINDOW_ARGB;
   else
     cw->mode = WINDOW_SOLID;
-
-  if (cw->extents)
-    {
-      XserverRegion damage;
-      damage = XFixesCreateRegion (xdisplay, NULL, 0);
-      XFixesCopyRegion (xdisplay, damage, cw->extents);
-
-      meta_compositor_add_damage (compositor, "determine_mode", damage);
-      XFixesDestroyRegion (xdisplay, damage);
-    }
 }
 
 static void
@@ -2584,6 +2568,12 @@ meta_compositor_xrender_window_opacity_changed (MetaCompositor *compositor,
   determine_mode (xrender, cw);
   cw->needs_shadow = window_has_shadow (xrender, cw);
 
+  if (cw->alpha_pict)
+    {
+      XRenderFreePicture (xrender->xdisplay, cw->alpha_pict);
+      cw->alpha_pict = None;
+    }
+
   if (cw->shadow)
     {
       XRenderFreePicture (xrender->xdisplay, cw->shadow);