From bafedf8376dbdda64360a630055291a4e9840524 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Sun, 17 Mar 2019 12:41:03 +0530
Subject: [PATCH] Make the scale sanitization more comprehensive

---
 kitty/glfw.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/kitty/glfw.c b/kitty/glfw.c
index 142075e86..b83c20f3a 100644
--- a/kitty/glfw.c
+++ b/kitty/glfw.c
@@ -386,9 +386,9 @@ get_window_content_scale(GLFWwindow *w, float *xscale, float *yscale, double *xd
         GLFWmonitor *monitor = glfwGetPrimaryMonitor();
         if (monitor) glfwGetMonitorContentScale(monitor, xscale, yscale);
     }
-    // check for zero or NaN values of xscale/yscale
-    if (!*xscale || *xscale != *xscale) *xscale = 1.0;
-    if (!*yscale || *yscale != *yscale) *yscale = 1.0;
+    // check for zero, negative, NaN or excessive values of xscale/yscale
+    if (*xscale <= 0 || *xscale != *xscale || *xscale >= 24) *xscale = 1.0;
+    if (*yscale <= 0 || *yscale != *yscale || *yscale >= 24) *yscale = 1.0;
 #ifdef __APPLE__
     const double factor = 72.0;
 #else