Cocoa: Select Vulkan surface extension at runtime

This mostly just follows the pattern established by X11.

Related to #1619.

CMakeLists.txt

@@ -145,8 +145,6 @@ elseif (WIN32)
 elseif (APPLE)
     set(_GLFW_COCOA 1)
     message(STATUS "Using Cocoa for window creation")
-    set(VK_USE_PLATFORM_METAL_EXT 1)
-    message(STATUS "Using VK_EXT_metal_surface")
 elseif (UNIX)
     set(_GLFW_X11 1)
     message(STATUS "Using X11 for window creation")

README.md

@@ -141,6 +141,7 @@ information on what to include when reporting a bug.
  - [Win32] Bugfix: The window hint `GLFW_MAXIMIZED` did not move or resize the
    window (#1499)
  - [Win32] Bugfix: Disabled cursor mode interfered with some non-client actions
+ - [Cocoa] Added support for `VK_EXT_metal_surface` (#1619)
  - [Cocoa] Removed dependency on the CoreVideo framework
  - [Cocoa] Bugfix: `glfwSetWindowSize` used a bottom-left anchor point (#1553)
  - [Cocoa] Bugfix: Window remained on screen after destruction until event poll
@@ -260,6 +261,7 @@ skills.
  - Cem Karan
  - Osman Keskin
  - Josh Kilmer
+ - Byunghoon Kim
  - Cameron King
  - Peter Knut
  - Christoph Kubisch

src/cocoa_platform.h

@@ -60,8 +60,8 @@ typedef void* id;
  #define NSWindowStyleMaskTitled NSTitledWindowMask
 #endif
 
-#if defined(VK_USE_PLATFORM_MACOS_MVK)
 typedef VkFlags VkMacOSSurfaceCreateFlagsMVK;
+typedef VkFlags VkMetalSurfaceCreateFlagsEXT;
 
 typedef struct VkMacOSSurfaceCreateInfoMVK
 {
@@ -71,24 +71,16 @@ typedef struct VkMacOSSurfaceCreateInfoMVK
     const void*                     pView;
 } VkMacOSSurfaceCreateInfoMVK;
 
-typedef VkResult (APIENTRY *PFN_vkCreateMacOSSurfaceMVK)(VkInstance,const VkMacOSSurfaceCreateInfoMVK*,const VkAllocationCallbacks*,VkSurfaceKHR*);
-
-#elif defined(VK_USE_PLATFORM_METAL_EXT)
-#define VK_EXT_metal_surface 1
-typedef void CAMetalLayer;
-
-#define VK_EXT_METAL_SURFACE_SPEC_VERSION 1
-#define VK_EXT_METAL_SURFACE_EXTENSION_NAME "VK_EXT_metal_surface"
-typedef VkFlags VkMetalSurfaceCreateFlagsEXT;
-typedef struct VkMetalSurfaceCreateInfoEXT {
+typedef struct VkMetalSurfaceCreateInfoEXT
+{
     VkStructureType                 sType;
     const void*                     pNext;
     VkMetalSurfaceCreateFlagsEXT    flags;
-    const CAMetalLayer*             pLayer;
+    const void*                     pLayer;
 } VkMetalSurfaceCreateInfoEXT;
 
+typedef VkResult (APIENTRY *PFN_vkCreateMacOSSurfaceMVK)(VkInstance,const VkMacOSSurfaceCreateInfoMVK*,const VkAllocationCallbacks*,VkSurfaceKHR*);
 typedef VkResult (APIENTRY *PFN_vkCreateMetalSurfaceEXT)(VkInstance,const VkMetalSurfaceCreateInfoEXT*,const VkAllocationCallbacks*,VkSurfaceKHR*);
-#endif
 
 #include "posix_thread.h"
 #include "cocoa_joystick.h"

src/cocoa_window.m

@@ -1715,19 +1715,16 @@ const char* _glfwPlatformGetClipboardString(void)
 
 void _glfwPlatformGetRequiredInstanceExtensions(char** extensions)
 {
-#if defined(VK_USE_PLATFORM_MACOS_MVK)
-    if (!_glfw.vk.KHR_surface || !_glfw.vk.MVK_macos_surface)
-        return;
-
-    extensions[0] = "VK_KHR_surface";
-    extensions[1] = "VK_MVK_macos_surface";
-
-#elif defined(VK_USE_PLATFORM_METAL_EXT)
-    if (!_glfw.vk.KHR_surface || !_glfw.vk.EXT_metal_surface)
-        return;
+    if (_glfw.vk.KHR_surface && _glfw.vk.EXT_metal_surface)
+    {
         extensions[0] = "VK_KHR_surface";
         extensions[1] = "VK_EXT_metal_surface";
-#endif
+    }
+    else if (_glfw.vk.KHR_surface && _glfw.vk.MVK_macos_surface)
+    {
+        extensions[0] = "VK_KHR_surface";
+        extensions[1] = "VK_MVK_macos_surface";
+    }
 }
 
 int _glfwPlatformGetPhysicalDevicePresentationSupport(VkInstance instance,
@@ -1745,35 +1742,6 @@ VkResult _glfwPlatformCreateWindowSurface(VkInstance instance,
     @autoreleasepool {
 
 #if MAC_OS_X_VERSION_MAX_ALLOWED >= 101100
-    VkResult err;
-
-#if defined(VK_USE_PLATFORM_MACOS_MVK)
-    VkMacOSSurfaceCreateInfoMVK sci;
-
-    PFN_vkCreateMacOSSurfaceMVK vkCreateMacOSSurfaceMVK;
-    vkCreateMacOSSurfaceMVK = (PFN_vkCreateMacOSSurfaceMVK)
-        vkGetInstanceProcAddr(instance, "vkCreateMacOSSurfaceMVK");
-    if (!vkCreateMacOSSurfaceMVK)
-    {
-        _glfwInputError(GLFW_API_UNAVAILABLE,
-                        "Cocoa: Vulkan instance missing VK_MVK_macos_surface extension");
-        return VK_ERROR_EXTENSION_NOT_PRESENT;
-    }
-
-#elif defined(VK_USE_PLATFORM_METAL_EXT)
-    VkMetalSurfaceCreateInfoEXT sci;
-
-    PFN_vkCreateMetalSurfaceEXT vkCreateMetalSurfaceEXT;
-    vkCreateMetalSurfaceEXT = (PFN_vkCreateMetalSurfaceEXT)
-        vkGetInstanceProcAddr(instance, "vkCreateMetalSurfaceEXT");
-    if (!vkCreateMetalSurfaceEXT)
-    {
-        _glfwInputError(GLFW_API_UNAVAILABLE,
-                        "Cocoa: Vulkan instance missing VK_EXT_metal_surface extension");
-        return VK_ERROR_EXTENSION_NOT_PRESENT;
-    }
-#endif
-
     // HACK: Dynamically load Core Animation to avoid adding an extra
     //       dependency for the majority who don't use MoltenVK
     NSBundle* bundle = [NSBundle bundleWithPath:@"/System/Library/Frameworks/QuartzCore.framework"];
@@ -1799,21 +1767,49 @@ VkResult _glfwPlatformCreateWindowSurface(VkInstance instance,
     [window->ns.view setLayer:window->ns.layer];
     [window->ns.view setWantsLayer:YES];
 
+    VkResult err;
+
+    if (_glfw.vk.EXT_metal_surface)
+    {
+        VkMetalSurfaceCreateInfoEXT sci;
+
+        PFN_vkCreateMetalSurfaceEXT vkCreateMetalSurfaceEXT;
+        vkCreateMetalSurfaceEXT = (PFN_vkCreateMetalSurfaceEXT)
+            vkGetInstanceProcAddr(instance, "vkCreateMetalSurfaceEXT");
+        if (!vkCreateMetalSurfaceEXT)
+        {
+            _glfwInputError(GLFW_API_UNAVAILABLE,
+                            "Cocoa: Vulkan instance missing VK_EXT_metal_surface extension");
+            return VK_ERROR_EXTENSION_NOT_PRESENT;
+        }
+
+        memset(&sci, 0, sizeof(sci));
+        sci.sType = VK_STRUCTURE_TYPE_METAL_SURFACE_CREATE_INFO_EXT;
+        sci.pLayer = window->ns.layer;
+
+        err = vkCreateMetalSurfaceEXT(instance, &sci, allocator, surface);
+    }
+    else
+    {
+        VkMacOSSurfaceCreateInfoMVK sci;
+
+        PFN_vkCreateMacOSSurfaceMVK vkCreateMacOSSurfaceMVK;
+        vkCreateMacOSSurfaceMVK = (PFN_vkCreateMacOSSurfaceMVK)
+            vkGetInstanceProcAddr(instance, "vkCreateMacOSSurfaceMVK");
+        if (!vkCreateMacOSSurfaceMVK)
+        {
+            _glfwInputError(GLFW_API_UNAVAILABLE,
+                            "Cocoa: Vulkan instance missing VK_MVK_macos_surface extension");
+            return VK_ERROR_EXTENSION_NOT_PRESENT;
+        }
+
         memset(&sci, 0, sizeof(sci));
-#if defined(VK_USE_PLATFORM_MACOS_MVK)
         sci.sType = VK_STRUCTURE_TYPE_MACOS_SURFACE_CREATE_INFO_MVK;
         sci.pView = window->ns.view;
 
         err = vkCreateMacOSSurfaceMVK(instance, &sci, allocator, surface);
+    }
 
-#elif defined(VK_USE_PLATFORM_METAL_EXT)
-    sci.sType = VK_STRUCTURE_TYPE_METAL_SURFACE_CREATE_INFO_EXT;
-    sci.pNext = NULL;
-    sci.flags = 0;
-    sci.pLayer = window->ns.layer;
-
-    err = vkCreateMetalSurfaceEXT(instance, &sci, allocator, surface);
-#endif
     if (err)
     {
         _glfwInputError(GLFW_PLATFORM_ERROR,

src/glfw_config.h.in

@@ -40,7 +40,6 @@
 #cmakedefine _GLFW_WIN32
 // Define this to 1 if building GLFW for Cocoa
 #cmakedefine _GLFW_COCOA
-#cmakedefine VK_USE_PLATFORM_METAL_EXT
 // Define this to 1 if building GLFW for Wayland
 #cmakedefine _GLFW_WAYLAND
 // Define this to 1 if building GLFW for OSMesa

src/internal.h

@@ -559,11 +559,8 @@ struct _GLFWlibrary
 #if defined(_GLFW_WIN32)
         GLFWbool        KHR_win32_surface;
 #elif defined(_GLFW_COCOA)
-    #if defined(VK_USE_PLATFORM_MACOS_MVK)
         GLFWbool        MVK_macos_surface;
-    #elif defined(VK_USE_PLATFORM_METAL_EXT)
         GLFWbool        EXT_metal_surface;
-    #endif
 #elif defined(_GLFW_X11)
         GLFWbool        KHR_xlib_surface;
         GLFWbool        KHR_xcb_surface;

src/vulkan.c

@@ -128,13 +128,10 @@ GLFWbool _glfwInitVulkan(int mode)
         else if (strcmp(ep[i].extensionName, "VK_KHR_win32_surface") == 0)
             _glfw.vk.KHR_win32_surface = GLFW_TRUE;
 #elif defined(_GLFW_COCOA)
-    #if defined(VK_USE_PLATFORM_MACOS_MVK)
         else if (strcmp(ep[i].extensionName, "VK_MVK_macos_surface") == 0)
             _glfw.vk.MVK_macos_surface = GLFW_TRUE;
-    #elif defined(VK_USE_PLATFORM_METAL_EXT)
         else if (strcmp(ep[i].extensionName, "VK_EXT_metal_surface") == 0)
             _glfw.vk.EXT_metal_surface = GLFW_TRUE;
-    #endif
 #elif defined(_GLFW_X11)
         else if (strcmp(ep[i].extensionName, "VK_KHR_xlib_surface") == 0)
             _glfw.vk.KHR_xlib_surface = GLFW_TRUE;