From 1b2d54d97a11372fbf1b67bc87d9e690cdbd3002 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Mon, 23 May 2022 12:50:47 +0530
Subject: [PATCH] Output a warning when libwayland-cursor returns incorrectly
 sized cursor images

---
 glfw/wl_init.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/glfw/wl_init.c b/glfw/wl_init.c
index 565148b3a..5abaf2daf 100644
--- a/glfw/wl_init.c
+++ b/glfw/wl_init.c
@@ -143,6 +143,10 @@ static void setCursor(GLFWCursorShape shape, _GLFWwindow* window)
 
     if (!image)
         return;
+    if (image->width % scale || image->height % scale) {
+        _glfwInputError(GLFW_PLATFORM_ERROR, "WARNING: Cursor image size: %dx%d is not a multiple of window scale: %d. This will"
+                " cause some compositors such as GNOME to crash. See https://github.com/kovidgoyal/kitty/issues/4878", image->width, image->height, scale);
+    }
 
     buffer = wl_cursor_image_get_buffer(image);
     if (!buffer)