From 2767c8419c1be9c11197307a85979f09eb5effe9 Mon Sep 17 00:00:00 2001
From: Richard Bates <richard@dreamrealityinteractive.com>
Date: Tue, 23 Jul 2024 12:09:10 +0100
Subject: [PATCH] Trigger window resize flow on GLFW3 when the window content
 scale changes, most commonly caused by moving window between monitors.
 Addresses issue 3448

---
 engine/platform/src/platform_window_glfw3.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/engine/platform/src/platform_window_glfw3.cpp b/engine/platform/src/platform_window_glfw3.cpp
index f2d1ca3e50d..761fa18c8f3 100644
--- a/engine/platform/src/platform_window_glfw3.cpp
+++ b/engine/platform/src/platform_window_glfw3.cpp
@@ -101,6 +101,13 @@ namespace dmPlatform
         }
     }
 
+    static void OnContentScaleCallback(GLFWwindow* glfw_window, float xscale, float yscale)
+    {
+        int width, height;
+        glfwGetWindowSize(glfw_window, &width, &height);
+        OnWindowResize(glfw_window, width, height);
+    }
+
     static void OnMouseScroll(GLFWwindow* glfw_window, double xoffset, double yoffset)
     {
         HWindow window = (HWindow) glfwGetWindowUserPointer(glfw_window);
@@ -259,6 +266,7 @@ namespace dmPlatform
             glfwSetScrollCallback(window->m_Window, OnMouseScroll);
             glfwSetCharCallback(window->m_Window, OnAddCharacterCallback);
             glfwSetMarkedTextCallback(window->m_Window, OnMarkedTextCallback);
+            glfwSetWindowContentScaleCallback(window->m_Window, OnContentScaleCallback);
 
             glfwSetJoystickCallback(OnJoystick);