From: Benjamin Otte <otte@redhat.com>
Date: Sat, 13 May 2023 16:35:02 +0000 (+0200)
Subject: gdk: Clamp frame region to surface size
X-Git-Tag: archive/raspbian/4.12.3+ds-1+rpi1~1^2^2^2~22^2~1^2~253^2~12
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=b530ade8c6eb6673f8ccd543616c89b609b747d8;p=gtk4.git

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
---

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