Backport upstream MR3299 to fix disabling scale-monitor-framebuffer

https://bugzilla.redhat.com/show_bug.cgi?id=2242061

3299.patch

@@ -0,0 +1,58 @@
+From 4008ed2f55d4621a4ed2230799c1ab2d012b3545 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Jonas=20=C3=85dahl?= <jadahl@gmail.com>
+Date: Wed, 27 Sep 2023 22:59:13 +0800
+Subject: [PATCH] monitor-config-store: Discard config with fractional scale
+ when unusable
+
+When a configuration has a fractional scale, but we're using a physical
+monitor layout, we can't use the scale, but if we do, we end up with
+wierd issues down the line. Just discard the config if we run into this.
+
+Eventually we probably want to store the layout mode in the
+configuration so we can handle more seamless switching between physical
+and logical layout mode, but first do this.
+
+Closes: https://gitlab.gnome.org/GNOME/mutter/-/issues/3057
+---
+ src/backends/meta-monitor-config-store.c | 13 +++++++++++--
+ 1 file changed, 11 insertions(+), 2 deletions(-)
+
+diff --git a/src/backends/meta-monitor-config-store.c b/src/backends/meta-monitor-config-store.c
+index fe9406fd3f7..53a32cd2aaf 100644
+--- a/src/backends/meta-monitor-config-store.c
++++ b/src/backends/meta-monitor-config-store.c
+@@ -653,6 +653,7 @@ derive_logical_monitor_layout (MetaLogicalMonitorConfig    *logical_monitor_conf
+   MetaMonitorConfig *monitor_config;
+   int mode_width, mode_height;
+   int width = 0, height = 0;
++  float scale;
+   GList *l;
+ 
+   monitor_config = logical_monitor_config->monitor_configs->data;
+@@ -683,13 +684,21 @@ derive_logical_monitor_layout (MetaLogicalMonitorConfig    *logical_monitor_conf
+       height = mode_height;
+     }
+ 
++  scale = logical_monitor_config->scale;
++
+   switch (layout_mode)
+     {
+     case META_LOGICAL_MONITOR_LAYOUT_MODE_LOGICAL:
+-      width = roundf (width / logical_monitor_config->scale);
+-      height = roundf (height / logical_monitor_config->scale);
++      width = roundf (width / scale);
++      height = roundf (height / scale);
+       break;
+     case META_LOGICAL_MONITOR_LAYOUT_MODE_PHYSICAL:
++      if (!G_APPROX_VALUE (scale, roundf (scale), FLT_EPSILON))
++        {
++          g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
++                       "A fractional scale with physical layout mode not allowed");
++          return FALSE;
++        }
+       break;
+     }
+ 
+-- 
+GitLab
+

mutter.spec

@@ -36,6 +36,9 @@ Patch5:        0001-util-Add-way-to-print-backtraces.patch
 Patch6:        0002-clutter-Add-ms2ns-helper.patch
 Patch7:        0003-native-Stop-using-real-time-thread-if-it-stalls.patch
 
+# https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3299
+Patch8:        3299.patch
+
 BuildRequires: pkgconfig(gobject-introspection-1.0) >= 1.41.0
 BuildRequires: pkgconfig(polkit-gobject-1)
 BuildRequires: pkgconfig(sm)