Fixed a case with Drag & Drop of images where the transparency is gone. Also fixed the editor "Center" patch, this was only working when width & height were smaller.

git-svn-id: http://svn.code.sf.net/p/greenshot/code/trunk@2283 7dccd23d-a4a3-4e1f-8c07-b4c1b4018ab4

GreenshotPlugin/Core/NetworkHelper.cs

@@ -80,6 +80,27 @@ namespace GreenshotPlugin.Core {
 			}
 			return null;
 		}
+
+		/// <summary>
+		/// Download the url to Bitmap
+		/// </summary>
+		/// <param name="baseUri"></param>
+		/// <returns>Bitmap</returns>
+		public static Bitmap DownloadImage(string url) {
+			try {
+				HttpWebRequest request = (HttpWebRequest)NetworkHelper.CreateWebRequest(url);
+				HttpWebResponse response = (HttpWebResponse)request.GetResponse();
+				if (request.HaveResponse) {
+					using (Image image = Image.FromStream(response.GetResponseStream())) {
+						return new Bitmap(image);
+					}
+				}
+
+			} catch (Exception e) {
+				LOG.Error("Problem downloading the image from: " + url, e);
+			}
+			return null;
+		}
 		
 		/// <summary>
 		/// Helper method to create a web request, eventually with proxy