初始化

CPF.Mac/Mac/OpenGL/CGLContext.cs

@@ -0,0 +1,106 @@
+using CPF.Mac.Foundation;
+using CPF.Mac.ObjCRuntime;
+using System;
+using System.Runtime.InteropServices;
+
+namespace CPF.Mac.OpenGL
+{
+	public class CGLContext : INativeObject, IDisposable
+	{
+		internal IntPtr handle;
+
+		public IntPtr Handle => handle;
+
+		public static CGLContext CurrentContext
+		{
+			get
+			{
+				IntPtr value = CGLGetCurrentContext();
+				if (value != IntPtr.Zero)
+				{
+					return new CGLContext(value);
+				}
+				return null;
+			}
+			set
+			{
+				if (CGLSetCurrentContext(value.Handle) != 0)
+				{
+					throw new Exception("Error setting the Current Context");
+				}
+			}
+		}
+
+		public CGLContext(IntPtr handle)
+		{
+			if (handle == IntPtr.Zero)
+			{
+				throw new Exception("Invalid parameters to context creation");
+			}
+			CGLRetainContext(handle);
+			this.handle = handle;
+		}
+
+		internal CGLContext()
+		{
+		}
+
+		[Preserve(Conditional = true)]
+		internal CGLContext(IntPtr handle, bool owns)
+		{
+			if (!owns)
+			{
+				CGLRetainContext(handle);
+			}
+			this.handle = handle;
+		}
+
+		~CGLContext()
+		{
+			Dispose(disposing: false);
+		}
+
+		public void Dispose()
+		{
+			Dispose(disposing: true);
+			GC.SuppressFinalize(this);
+		}
+
+		[DllImport("/System/Library/Frameworks/OpenGL.framework/OpenGL")]
+		private static extern void CGLRetainContext(IntPtr handle);
+
+		[DllImport("/System/Library/Frameworks/OpenGL.framework/OpenGL")]
+		private static extern void CGLReleaseContext(IntPtr handle);
+
+		protected virtual void Dispose(bool disposing)
+		{
+			if (handle != IntPtr.Zero)
+			{
+				CGLReleaseContext(handle);
+				handle = IntPtr.Zero;
+			}
+		}
+
+		[DllImport("/System/Library/Frameworks/OpenGL.framework/OpenGL")]
+		private static extern CGLErrorCode CGLLockContext(IntPtr ctx);
+
+		public CGLErrorCode Lock()
+		{
+			return CGLLockContext(handle);
+		}
+
+		[DllImport("/System/Library/Frameworks/OpenGL.framework/OpenGL")]
+		private static extern CGLErrorCode CGLUnlockContext(IntPtr ctx);
+
+		public CGLErrorCode Unlock()
+		{
+			return CGLUnlockContext(handle);
+		}
+
+		[DllImport("/System/Library/Frameworks/OpenGL.framework/OpenGL")]
+		private static extern CGLErrorCode CGLSetCurrentContext(IntPtr ctx);
+
+		[DllImport("/System/Library/Frameworks/OpenGL.framework/OpenGL")]
+		private static extern IntPtr CGLGetCurrentContext();
+	}
+}