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-rw-r--r--plugingui/nativewindow_x11.cc11
1 files changed, 11 insertions, 0 deletions
diff --git a/plugingui/nativewindow_x11.cc b/plugingui/nativewindow_x11.cc
index bc9091d..70053ca 100644
--- a/plugingui/nativewindow_x11.cc
+++ b/plugingui/nativewindow_x11.cc
@@ -249,6 +249,17 @@ void NativeWindowX11::redraw(const Rect& dirty_rect)
auto x2 = dirty_rect.x2;
auto y2 = dirty_rect.y2;
+ // Make sure we don't try to paint a rect backwards.
+ if(x1 > x2)
+ {
+ std::swap(x1, x2);
+ }
+
+ if(y1 > y2)
+ {
+ std::swap(y1, y2);
+ }
+
updateImageFromBuffer(x1, y1, x2, y2);
XShmPutImage(display, xwindow, gc, image, x1, y1, x1, y1,