From fa02394047dea9c465bba19c4021d8054f4554f1 Mon Sep 17 00:00:00 2001
From: RKrom <robin@getgreenshot.org>
Date: Thu, 15 Nov 2012 12:22:42 +0000
Subject: [PATCH] Added DwmEnableComposition for testing

git-svn-id: http://svn.code.sf.net/p/greenshot/code/trunk@2286 7dccd23d-a4a3-4e1f-8c07-b4c1b4018ab4
---
 GreenshotPlugin/UnmanagedHelpers/DWM.cs | 30 ++++++++++++++++---------
 1 file changed, 19 insertions(+), 11 deletions(-)

diff --git a/GreenshotPlugin/UnmanagedHelpers/DWM.cs b/GreenshotPlugin/UnmanagedHelpers/DWM.cs
index 9a355edd1..ef4f2d536 100644
--- a/GreenshotPlugin/UnmanagedHelpers/DWM.cs
+++ b/GreenshotPlugin/UnmanagedHelpers/DWM.cs
@@ -93,6 +93,9 @@ namespace GreenshotPlugin.UnmanagedHelpers {
 	/// Description of DWM.
 	/// </summary>
 	public class DWM {
+		public static readonly uint DWM_EC_DISABLECOMPOSITION = 0;
+		public static readonly uint DWM_EC_ENABLECOMPOSITION = 1;
+
 		// DWM
 		[DllImport("dwmapi", SetLastError = true)]
 		public static extern int DwmRegisterThumbnail(IntPtr dest, IntPtr src, out IntPtr thumb);
@@ -103,19 +106,24 @@ namespace GreenshotPlugin.UnmanagedHelpers {
 		[DllImport("dwmapi", SetLastError = true)]
 		public static extern int DwmUpdateThumbnailProperties(IntPtr hThumb, ref DWM_THUMBNAIL_PROPERTIES props);
 
-        // Deprecated as of Windows 8 Release Preview
+		// Deprecated as of Windows 8 Release Preview
 		[DllImport("dwmapi", SetLastError = true)]
 		public static extern int DwmIsCompositionEnabled(out bool enabled);
 		[DllImport("dwmapi", SetLastError = true)]
 		public static extern int DwmGetWindowAttribute(IntPtr hwnd, int dwAttribute, out RECT lpRect, int size);
 		[DllImport("dwmapi", SetLastError = true)] 
 		public static extern int DwmEnableBlurBehindWindow(IntPtr hwnd, ref DWM_BLURBEHIND blurBehind);
+		[DllImport("dwmapi", SetLastError = true)]
+		public static extern uint DwmEnableComposition(uint uCompositionAction);
 
-        // Windows 8, e.g.:
-        //[DllImport("dwmapi", SetLastError = true)]
-        //public static extern DWMAPI DwmShowContact(DWORD dwPointerID, DWM_SHOWCONTACT eShowContact);
+		public static void EnableComposition() {
+			DWM.DwmEnableComposition(DWM.DWM_EC_ENABLECOMPOSITION);
+		}
+		public static void DisableComposition() {
+			DWM.DwmEnableComposition(DWM.DWM_EC_DISABLECOMPOSITION);
+		}
 
-        // Key to ColorizationColor for DWM
+		// Key to ColorizationColor for DWM
 		private const string COLORIZATION_COLOR_KEY = @"SOFTWARE\Microsoft\Windows\DWM";
 
 		/// <summary>
@@ -123,12 +131,12 @@ namespace GreenshotPlugin.UnmanagedHelpers {
 		/// </summary>
 		/// <returns>bool true if DWM is available AND active</returns>
 		public static bool isDWMEnabled() {
-            // According to: http://technet.microsoft.com/en-us/subscriptions/aa969538%28v=vs.85%29.aspx
-            // And: http://msdn.microsoft.com/en-us/library/windows/desktop/aa969510%28v=vs.85%29.aspx
-            // DMW is always enabled on Windows 8! So return true and save a check! ;-)
-            if (Environment.OSVersion.Version.Major == 6 && Environment.OSVersion.Version.Minor == 2) {
-                return true;
-            }
+			// According to: http://technet.microsoft.com/en-us/subscriptions/aa969538%28v=vs.85%29.aspx
+			// And: http://msdn.microsoft.com/en-us/library/windows/desktop/aa969510%28v=vs.85%29.aspx
+			// DMW is always enabled on Windows 8! So return true and save a check! ;-)
+			if (Environment.OSVersion.Version.Major == 6 && Environment.OSVersion.Version.Minor == 2) {
+				return true;
+			}
 			if (Environment.OSVersion.Version.Major >= 6) {
 				bool dwmEnabled;
 				DWM.DwmIsCompositionEnabled(out dwmEnabled);