From 44f8a80ade160087d9cb4341467683170f60acf1 Mon Sep 17 00:00:00 2001
From: Sebastian Emanuel Dawid <sdawid@techfak.uni-bielefeld.de>
Date: Sat, 16 Aug 2025 00:46:54 +0200
Subject: [PATCH] Add WebGPU support for MacOS

---
 src/cocoa_init.m     |  3 ++-
 src/cocoa_platform.h |  2 ++
 src/cocoa_window.m   | 20 ++++++++++++++++++++
 3 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/src/cocoa_init.m b/src/cocoa_init.m
index 15dc4ec4..0df7a330 100644
--- a/src/cocoa_init.m
+++ b/src/cocoa_init.m
@@ -564,7 +564,8 @@ GLFWbool _glfwConnectCocoa(int platformID, _GLFWplatform* platform)
         .getEGLNativeWindow = _glfwGetEGLNativeWindowCocoa,
         .getRequiredInstanceExtensions = _glfwGetRequiredInstanceExtensionsCocoa,
         .getPhysicalDevicePresentationSupport = _glfwGetPhysicalDevicePresentationSupportCocoa,
-        .createWindowSurface = _glfwCreateWindowSurfaceCocoa
+        .createWindowSurface = _glfwCreateWindowSurfaceCocoa,
+        .createWindowWGPUSurface = _glfwCreateWindowWGPUSurfaceCocoa
     };
 
     *platform = cocoa;
diff --git a/src/cocoa_platform.h b/src/cocoa_platform.h
index 4d1d66ae..f7fa7b6f 100644
--- a/src/cocoa_platform.h
+++ b/src/cocoa_platform.h
@@ -276,6 +276,8 @@ void _glfwGetRequiredInstanceExtensionsCocoa(char** extensions);
 GLFWbool _glfwGetPhysicalDevicePresentationSupportCocoa(VkInstance instance, VkPhysicalDevice device, uint32_t queuefamily);
 VkResult _glfwCreateWindowSurfaceCocoa(VkInstance instance, _GLFWwindow* window, const VkAllocationCallbacks* allocator, VkSurfaceKHR* surface);
 
+WGPUSurface _glfwCreateWindowWGPUSurfaceCocoa(WGPUInstance instance, _GLFWwindow* window);
+
 void _glfwFreeMonitorCocoa(_GLFWmonitor* monitor);
 void _glfwGetMonitorPosCocoa(_GLFWmonitor* monitor, int* xpos, int* ypos);
 void _glfwGetMonitorContentScaleCocoa(_GLFWmonitor* monitor, float* xscale, float* yscale);
diff --git a/src/cocoa_window.m b/src/cocoa_window.m
index e69b5fe0..9b5d1bc5 100644
--- a/src/cocoa_window.m
+++ b/src/cocoa_window.m
@@ -2020,6 +2020,26 @@ VkResult _glfwCreateWindowSurfaceCocoa(VkInstance instance,
     } // autoreleasepool
 }
 
+typedef struct WGPUSurfaceSourceMetalLayer {
+    WGPUChainedStruct chain;
+    void * layer;
+} WGPUSurfaceSourceMetalLayer;
+
+WGPUSurface _glfwCreateWindowWGPUSurfaceCocoa(WGPUInstance instance, _GLFWwindow* window) {
+    [window->ns.view setLayer:window->ns.layer];
+    [window->ns.view setWantsLayer:YES];
+
+    WGPUSurfaceSourceMetalLayer metalSurface;
+    metalSurface.chain.next = NULL;
+    metalSurface.chain.sType = WGPUSType_SurfaceSourceMetalLayer;
+    metalSurface.layer = window->ns.layer;
+
+    WGPUSurfaceDescriptor surfaceDescriptor;
+    surfaceDescriptor.nextInChain = &metalSurface.chain;
+    surfaceDescriptor.label = (WGPUStringView){ NULL, SIZE_MAX };
+
+    return wgpuInstanceCreateSurface(instance, &surfaceDescriptor);
+}
 
 //////////////////////////////////////////////////////////////////////////
 //////                        GLFW native API                       //////