From 4b4496dbccc5f286f0ef411f0ff702d67cb95145 Mon Sep 17 00:00:00 2001
From: Gerd Hoffmann <kraxel@redhat.com>
Date: Fri, 14 Dec 2012 08:54:25 +0100
Subject: [PATCH] console: clip update rectangle

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
---
 console.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/console.h b/console.h
index 50a0512f32..edb1950871 100644
--- a/console.h
+++ b/console.h
@@ -229,6 +229,16 @@ static inline void unregister_displaychangelistener(DisplayState *ds,
 static inline void dpy_gfx_update(DisplayState *s, int x, int y, int w, int h)
 {
     struct DisplayChangeListener *dcl;
+    int width = pixman_image_get_width(s->surface->image);
+    int height = pixman_image_get_height(s->surface->image);
+
+    x = MAX(x, 0);
+    y = MAX(y, 0);
+    x = MIN(x, width);
+    y = MIN(y, height);
+    w = MIN(w, width - x);
+    h = MIN(h, height - y);
+
     QLIST_FOREACH(dcl, &s->listeners, next) {
         if (dcl->dpy_gfx_update) {
             dcl->dpy_gfx_update(s, x, y, w, h);