Implement the unified Metal surface creation

libportability-gfx/src/impls.rs

@@ -67,10 +67,8 @@ pub extern "C" fn gfxCreateInstance(
         .map(Handle::new)
         .collect();
 
-    unsafe {
+    let create_info = unsafe { &*pCreateInfo };
-        let create_info = &*pCreateInfo;
+    let application_info = unsafe { create_info.pApplicationInfo.as_ref() };
-
-        let application_info = create_info.pApplicationInfo.as_ref();
 
     if let Some(ai) = application_info {
         // Compare major and minor parts of version only - patch is ignored
@@ -84,28 +82,24 @@ pub extern "C" fn gfxCreateInstance(
         }
     }
 
-        let enabled_extensions = if create_info.enabledExtensionCount == 0 {
+    let mut enabled_extensions = Vec::new();
-            Vec::new()
+    if create_info.enabledExtensionCount != 0 {
-        } else {
+        for raw in unsafe {
-            let extensions = slice::from_raw_parts(
+            slice::from_raw_parts(create_info.ppEnabledExtensionNames, create_info.enabledExtensionCount as _)
-                create_info.ppEnabledExtensionNames,
+        } {
-                create_info.enabledExtensionCount as _,
+            let cstr = unsafe { CStr::from_ptr(*raw) };
-            ).iter()
+            if !INSTANCE_EXTENSION_NAMES.contains(&cstr.to_bytes_with_nul()) {
-                .map(|raw| {
-                    CStr::from_ptr(*raw)
-                        .to_str()
-                        .expect("Invalid extension name")
-                        .to_owned()
-                })
-                .collect::<Vec<_>>();
-            for extension in &extensions {
-                if !INSTANCE_EXTENSION_NAMES.contains(&extension.as_str()) {
                 return VkResult::VK_ERROR_EXTENSION_NOT_PRESENT;
             }
+            let owned = cstr
+                .to_str()
+                .expect("Invalid extension name")
+                .to_owned();
+            enabled_extensions.push(owned);
+        }
     }
-            extensions
-        };
 
+    unsafe {
         *pInstance = Handle::new(RawInstance {
             backend,
             adapters,
@@ -493,6 +487,7 @@ pub extern "C" fn gfxGetInstanceProcAddr(
         vkGetPhysicalDeviceSurfacePresentModesKHR, PFN_vkGetPhysicalDeviceSurfacePresentModesKHR => gfxGetPhysicalDeviceSurfacePresentModesKHR,
 
         vkCreateWin32SurfaceKHR, PFN_vkCreateWin32SurfaceKHR => gfxCreateWin32SurfaceKHR,
+        vkCreateMetalSurfaceEXT, PFN_vkCreateMetalSurfaceEXT => gfxCreateMetalSurfaceEXT,
         vkCreateMacOSSurfaceMVK, PFN_vkCreateMacOSSurfaceMVK => gfxCreateMacOSSurfaceMVK,
 
         vkDestroySurfaceKHR, PFN_vkDestroySurfaceKHR => gfxDestroySurfaceKHR,
@@ -817,10 +812,8 @@ pub extern "C" fn gfxCreateDevice(
                 rd_device
             };
 
-            let enabled_extensions = if dev_info.enabledExtensionCount == 0 {
+            let mut enabled_extensions = Vec::new();
-                Vec::new()
+            if dev_info.enabledExtensionCount != 0 {
-            } else {
-                let mut extensions = Vec::new();
                 for raw in unsafe {
                     slice::from_raw_parts(dev_info.ppEnabledExtensionNames, dev_info.enabledExtensionCount as _)
                 } {
@@ -832,10 +825,9 @@ pub extern "C" fn gfxCreateDevice(
                         .to_str()
                         .expect("Invalid extension name")
                         .to_owned();
-                    extensions.push(owned);
+                    enabled_extensions.push(owned);
+                }
             }
-                extensions
-            };
 
             let gpu = Gpu {
                 device: gpu.device,
@@ -879,22 +871,17 @@ pub extern "C" fn gfxDestroyDevice(gpu: VkDevice, _pAllocator: *const VkAllocati
     }
 }
 
-// TODO: Avoid redefining these somehow
-static INSTANCE_EXTENSION_NAME_VK_KHR_SURFACE: &str = "VK_KHR_surface";
-#[cfg(target_os="windows")]
-static INSTANCE_EXTENSION_NAME_VK_KHR_WIN32_SURFACE: &str = "VK_KHR_win32_surface";
-#[cfg(target_os="macos")]
-static INSTANCE_EXTENSION_NAME_VK_MACOS_SURFACE: &str = "VK_MVK_macos_surface";
-
 lazy_static! {
     // TODO: Request from backend
-    static ref INSTANCE_EXTENSION_NAMES: Vec<&'static str> = {
+    static ref INSTANCE_EXTENSION_NAMES: Vec<&'static [u8]> = {
         vec![
-            INSTANCE_EXTENSION_NAME_VK_KHR_SURFACE,
+            VK_KHR_SURFACE_EXTENSION_NAME,
             #[cfg(target_os="windows")]
-            INSTANCE_EXTENSION_NAME_VK_KHR_WIN32_SURFACE,
+            VK_KHR_WIN32_SURFACE_EXTENSION_NAME,
             #[cfg(target_os="macos")]
-            INSTANCE_EXTENSION_NAME_VK_MACOS_SURFACE,
+            VK_EXT_METAL_SURFACE_EXTENSION_NAME,
+            #[cfg(target_os="macos")]
+            VK_MVK_MACOS_SURFACE_EXTENSION_NAME,
         ]
     };
 
@@ -920,7 +907,7 @@ lazy_static! {
             extension
                 .extensionName[.. name.len()]
                 .copy_from_slice(unsafe {
-                    mem::transmute(name.as_bytes())
+                    mem::transmute(name)
                 });
         }
 
@@ -1105,8 +1092,8 @@ pub extern "C" fn gfxQueueSubmit(
 
     let submission = hal::queue::Submission {
         command_buffers: cmd_slice.iter(),
-        wait_semaphores: wait_semaphores,
+        wait_semaphores,
-        signal_semaphores: signal_semaphores,
+        signal_semaphores,
     };
 
     unsafe { queue.submit(submission, fence.as_ref()); }
@@ -4613,12 +4600,37 @@ pub extern "C" fn gfxQueuePresentKHR(
             .map(|semaphore| &**semaphore)
     };
 
-    unsafe {
+    match unsafe {
-        queue.present(swapchains, wait_semaphores).unwrap();
+        queue.present(swapchains, wait_semaphores)
+    } {
+        Ok(_) => VkResult::VK_SUCCESS,
+        Err(_) => VkResult::VK_ERROR_SURFACE_LOST_KHR,
+    }
 }
 
+#[inline]
+pub extern "C" fn gfxCreateMetalSurfaceEXT(
+    instance: VkInstance,
+    pCreateInfo: *const VkMetalSurfaceCreateInfoEXT,
+    pAllocator: *const VkAllocationCallbacks,
+    pSurface: *mut VkSurfaceKHR,
+) -> VkResult {
+    assert!(pAllocator.is_null());
+    let info = unsafe { &*pCreateInfo };
+    #[cfg(feature = "gfx-backend-metal")]
+    unsafe {
+        assert_eq!(info.flags, 0);
+        *pSurface = Handle::new(
+            instance.backend.create_surface_from_layer(info.pLayer as *mut _),
+        );
         VkResult::VK_SUCCESS
     }
+    #[cfg(not(feature = "gfx-backend-metal"))]
+    {
+        let _ = (instance, info, pSurface);
+        unreachable!()
+    }
+}
 
 #[inline]
 pub extern "C" fn gfxCreateMacOSSurfaceMVK(

libportability-gfx/src/lib.rs

@@ -265,6 +265,9 @@ pub const VK_KHR_WIN32_SURFACE_EXTENSION_NAME: &'static [u8; 21usize] =
     b"VK_KHR_win32_surface\x00";
 pub const VK_MVK_MACOS_SURFACE_EXTENSION_NAME: &'static [u8; 21usize] =
     b"VK_MVK_macos_surface\x00";
+pub const VK_EXT_METAL_SURFACE_EXTENSION_NAME: &'static [u8; 21usize] =
+    b"VK_EXT_metal_surface\x00";
+pub const VK_EXT_METAL_SURFACE_SPEC_VERSION: ::std::os::raw::c_uint = 1;
 pub const VK_KHR_swapchain: ::std::os::raw::c_uint = 1;
 pub const VK_KHR_SWAPCHAIN_SPEC_VERSION: ::std::os::raw::c_uint = 68;
 pub const VK_KHR_SWAPCHAIN_EXTENSION_NAME: &'static [u8; 17usize] =
@@ -839,6 +842,7 @@ pub enum VkStructureType {
         1000099001,
     VK_STRUCTURE_TYPE_IOS_SURFACE_CREATE_INFO_MVK = 1000122000,
     VK_STRUCTURE_TYPE_MACOS_SURFACE_CREATE_INFO_MVK = 1000123000,
+    VK_STRUCTURE_TYPE_METAL_SURFACE_CREATE_INFO_EXT = 1000248000,
     VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_PORTABILITY_SUBSET_FEATURES_EXTX = 100163000,
     VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_PORTABILITY_SUBSET_PROPERTIES_EXTX = 100163001,
     VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_IMAGE_VIEW_SUPPORT_EXTX = 100163002,
@@ -1936,6 +1940,8 @@ pub enum VkStencilFaceFlagBits {
     VK_STENCIL_FACE_FLAG_BITS_MAX_ENUM = 2147483647,
 }
 pub type VkStencilFaceFlags = VkFlags;
+pub type VkMetalSurfaceCreateFlagsEXT = VkFlags;
+
 pub type PFN_vkAllocationFunction =
     ::std::option::Option<unsafe extern "C" fn(pUserData:
                                                    *mut ::std::os::raw::c_void,
@@ -6913,6 +6919,13 @@ pub type PFN_vkCreateWin32SurfaceKHR = ::std::option::Option<unsafe extern "C" f
     pSurface: *mut VkSurfaceKHR,
 ) -> VkResult>;
 
+pub type PFN_vkCreateMetalSurfaceEXT = ::std::option::Option<unsafe extern "C" fn(
+    instance: VkInstance,
+    pCreateInfo: *const VkMetalSurfaceCreateInfoEXT,
+    pAllocator: *const VkAllocationCallbacks,
+    pSurface: *mut VkSurfaceKHR,
+) -> VkResult>;
+
 pub type PFN_vkCreateMacOSSurfaceMVK = ::std::option::Option<unsafe extern "C" fn(
     instance: VkInstance,
     pCreateInfo: *const VkMacOSSurfaceCreateInfoMVK,
@@ -6959,3 +6972,14 @@ pub struct VkPhysicalDeviceImageViewSupportEXTX {
 impl Clone for VkPhysicalDeviceImageViewSupportEXTX {
     fn clone(&self) -> Self { *self }
 }
+#[repr(C)]
+#[derive(Debug, Copy)]
+pub struct VkMetalSurfaceCreateInfoEXT {
+    pub sType: VkStructureType,
+    pub pNext: *const ::std::os::raw::c_void,
+    pub flags: VkMetalSurfaceCreateFlagsEXT,
+    pub pLayer: *const ::std::os::raw::c_void,
+}
+impl Clone for VkMetalSurfaceCreateInfoEXT {
+    fn clone(&self) -> Self { *self }
+}