From b692674f38e616f3415acc3998fddfdfeea4061f Mon Sep 17 00:00:00 2001
From: JKlingen <jens@getgreenshot.org>
Date: Wed, 6 Feb 2013 22:11:21 +0000
Subject: [PATCH] added CreateMonochrome(Image), which creates a black/white
 version of the image (not accessible via UI yet, needs some more testing)

git-svn-id: http://svn.code.sf.net/p/greenshot/code/trunk@2466 7dccd23d-a4a3-4e1f-8c07-b4c1b4018ab4
---
 GreenshotPlugin/Core/ImageHelper.cs | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/GreenshotPlugin/Core/ImageHelper.cs b/GreenshotPlugin/Core/ImageHelper.cs
index c93c05226..0ac5739c5 100644
--- a/GreenshotPlugin/Core/ImageHelper.cs
+++ b/GreenshotPlugin/Core/ImageHelper.cs
@@ -967,6 +967,27 @@ namespace GreenshotPlugin.Core {
 				return bb.Bitmap;
 			}
 		}
+		
+		/// <summary>
+		/// Returns a b/w of Bitmap
+		/// </summary>
+		/// <param name="sourceImage">Bitmap to create a b/w off</param>
+		/// <returns>b/w bitmap</returns>
+		public static Bitmap CreateMonochrome(Image sourceImage) {
+			using (BitmapBuffer bb = new BitmapBuffer(sourceImage, true)) {
+				bb.Lock();
+				for (int y = 0; y < bb.Height; y++) {
+					for (int x = 0; x < bb.Width; x++) {
+						Color color = bb.GetColorAt(x, y);
+						int colorBrightness = (color.R+color.G+color.B > 382) ? 255 : 0;
+						Color monoColor = Color.FromArgb(color.A, colorBrightness, colorBrightness, colorBrightness);
+						bb.SetColorAt(x, y, monoColor);
+					}
+				}
+				bb.Unlock();
+				return bb.Bitmap;
+			}
+		}
 
 		/// <summary>
 		/// Create a new bitmap where the sourceBitmap has a Simple border around it