File mutter-fix-clipped-redraw.patch of Package mutter

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File mutter-fix-clipped-redraw.patch of Package mutter

From afd7d5ad1b5587eb2c4dd978f0e577d9640354be Mon Sep 17 00:00:00 2001
From: Carlos Garnacho <carlosg@gnome.org>
Date: Tue, 29 Aug 2023 11:21:50 +0200
Subject: [PATCH] backends: Check that buffer age is available when checking
 damage history

This used to be the case before the refactor at commit 43cee4b6b6,
use_clipped_redraw would be unset before the larger check if has_buffer_age
was set, but clutter_damage_history_is_age_valid() was FALSE. This got
replaced by a check just on the latter, which will also be FALSE if
has_buffer_age is not present.

We have other means to achieve clipped redraws, so this slight change
culled all of them.

Fixes: 43cee4b6b6 ("stage-impl: Do clipped redraws when drawing offscreen")
Closes: https://gitlab.gnome.org/GNOME/mutter/-/issues/2771
---
 src/backends/meta-stage-impl.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/backends/meta-stage-impl.c b/src/backends/meta-stage-impl.c
index 26a7531296b..af88451d331 100644
--- a/src/backends/meta-stage-impl.c
+++ b/src/backends/meta-stage-impl.c
@@ -475,7 +475,7 @@ should_use_clipped_redraw (gboolean              is_full_redraw,
   if (COGL_IS_OFFSCREEN (framebuffer))
     return TRUE;
 
-  if (!buffer_has_valid_damage_history)
+  if (has_buffer_age && !buffer_has_valid_damage_history)
     {
       meta_topic (META_DEBUG_BACKEND,
                   "Invalid back buffer age: forcing full redraw");
-- 
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File mutter-fix-clipped-redraw.patch of Package mutter

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