From ca8aa18fd22cca1a1d89584ca16e66d5727c50b8 Mon Sep 17 00:00:00 2001
From: "Adam D. Ruppe" <destructionator@gmail.com>
Date: Mon, 20 Jan 2020 12:00:20 -0500
Subject: [PATCH] can cause bad number error without this fix

---
 simpledisplay.d | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/simpledisplay.d b/simpledisplay.d
index 4d0e970..127e419 100644
--- a/simpledisplay.d
+++ b/simpledisplay.d
@@ -8943,6 +8943,10 @@ version(X11) {
 
 		void drawImage(int x, int y, Image i, int ix, int iy, int w, int h) {
 			// source x, source y
+			if(ix >= i.width) return;
+			if(iy >= i.height) return;
+			if(ix + w > i.width) w = i.width - ix;
+			if(iy + h > i.height) h = i.height - iy;
 			if(i.usingXshm)
 				XShmPutImage(display, d, gc, i.handle, ix, iy, x, y, w, h, false);
 			else