From b530ade8c6eb6673f8ccd543616c89b609b747d8 Mon Sep 17 00:00:00 2001
From: Benjamin Otte <otte@redhat.com>
Date: Sat, 13 May 2023 18:35:02 +0200
Subject: [PATCH] gdk: Clamp frame region to surface size

The region may be larger than the surface's size, but many rendering
APIs require the size to be clamped.

Fixes #5812
---
 gdk/gdkdrawcontext.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/gdk/gdkdrawcontext.c b/gdk/gdkdrawcontext.c
index 8699807cab..e461ebdd28 100644
--- a/gdk/gdkdrawcontext.c
+++ b/gdk/gdkdrawcontext.c
@@ -371,6 +371,12 @@ gdk_draw_context_begin_frame_full (GdkDrawContext       *context,
   priv->surface->paint_context = g_object_ref (context);
 
   GDK_DRAW_CONTEXT_GET_CLASS (context)->begin_frame (context, prefers_high_depth, priv->frame_region);
+
+  cairo_region_intersect_rectangle (priv->frame_region,
+                                    &(cairo_rectangle_int_t) {
+                                      0, 0,
+                                      priv->surface->width, priv->surface->height
+                                    });
 }
 
 #ifdef HAVE_SYSPROF