move sample.Utils to main lib and Vulkan.Utils

1 files changed, 32 insertions, 0 deletions

diff --git a/vulkan/LoadingUtils.cs b/vulkan/LoadingUtils.cs
new file mode 100644
index 0000000..b91a47b
--- /dev/null
+++ b/vulkan/LoadingUtils.cs
@@ -0,0 +1,32 @@
+// Copyright (c) 2019  Jean-Philippe Bruyère <jp_bruyere@hotmail.com>
+//
+// This code is licensed under the MIT license (MIT) (http://opensource.org/licenses/MIT)
+using System;
+using System.Runtime.InteropServices;
+
+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;
+		}
+		/// <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 ();
+		}
+	}
+}