1 files changed, 42 insertions, 21 deletions
diff --git a/vulkan/Utils.cs b/vulkan/Utils.cs
index b91a47b..bf629ed 100644
--- a/vulkan/Utils.cs
+++ b/vulkan/Utils.cs
@@ -3,30 +3,51 @@
 // This code is licensed under the MIT license (MIT) (http://opensource.org/licenses/MIT)
 using System;
 using System.Runtime.InteropServices;
+using System.Runtime.CompilerServices;
+using Vulkan;
+using static Vulkan.Vk;
 
 namespace Vulkan {
-	internal static class LoadingUtils {
-		public static IntPtr GetDelegate (VkInstance inst, string name) {
-			byte[] n = System.Text.Encoding.UTF8.GetBytes (name + '\0');
-			GCHandle hnd = GCHandle.Alloc (n, GCHandleType.Pinned);
-			IntPtr del = Vk.vkGetInstanceProcAddr (inst, hnd.AddrOfPinnedObject ());
-			if (del == IntPtr.Zero)
-				System.Diagnostics.Debug.WriteLine ("instance function pointer not found for " + name);
-			hnd.Free ();
-			return del;
+	public static class Utils {
+		public static void CheckResult (VkResult result, string msg = "Call failed",
+			[CallerMemberName] string caller = null,
+			[CallerFilePath] string sourceFilePath = "",
+			[CallerLineNumber] int sourceLineNumber = 0) {
+			if (result != VkResult.Success)
+				throw new InvalidOperationException ($"[{sourceFilePath}:{sourceLineNumber}->{caller}]{msg}: {result}");
 		}
-		/// <summary>
-		/// try to get device function handle if available
-		/// </summary>
-		public static void GetDelegate (VkDevice dev, string name, ref IntPtr ptr) {
-			byte[] n = System.Text.Encoding.UTF8.GetBytes (name + '\0');
-			GCHandle hnd = GCHandle.Alloc (n, GCHandleType.Pinned);
-			IntPtr del = Vk.vkGetDeviceProcAddr (dev, hnd.AddrOfPinnedObject ());
-			if (del == IntPtr.Zero)
-				System.Diagnostics.Debug.WriteLine ("device function pointer not found for " + name);
-			else
-				ptr = del;
-			hnd.Free ();
+		public static bool TryGetPhysicalDevice (VkInstance inst, VkPhysicalDeviceType deviceType, out VkPhysicalDevice phy) {
+			CheckResult (vkEnumeratePhysicalDevices (inst, out uint phyCount, IntPtr.Zero));
+
+			VkPhysicalDevice[] phys = new VkPhysicalDevice[phyCount];
+
+			CheckResult (vkEnumeratePhysicalDevices (inst, out phyCount, phys.Pin()));
+
+			for (int i = 0; i < phys.Length; i++)
+			{
+				phy = phys[i];
+				vkGetPhysicalDeviceProperties (phy, out VkPhysicalDeviceProperties props);
+				if (props.deviceType == deviceType)
+					return true;
+			}
+			phy = default;
+			return false;
+		}
+		public static VkPhysicalDeviceToolPropertiesEXT[] GetToolProperties (VkPhysicalDevice phy) {
+			CheckResult (vkGetPhysicalDeviceToolPropertiesEXT (phy , out uint count, IntPtr.Zero));
+			int sizeStruct = Marshal.SizeOf<VkPhysicalDeviceToolPropertiesEXT> ();
+			IntPtr ptrTools = Marshal.AllocHGlobal (sizeStruct * (int)count);
+			CheckResult (vkGetPhysicalDeviceToolPropertiesEXT (phy , out count, ptrTools));
+
+			VkPhysicalDeviceToolPropertiesEXT[] result = new VkPhysicalDeviceToolPropertiesEXT[count];
+			IntPtr tmp = ptrTools;
+			for (int i = 0; i < count; i++) {
+				result[i] = Marshal.PtrToStructure<VkPhysicalDeviceToolPropertiesEXT> (tmp);
+				tmp += sizeStruct;
+			}
+
+			Marshal.FreeHGlobal (ptrTools);
+			return result;
 		}
 	}
 }