Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web.Mobile/UI/MobileControls/Design/Util/WbmpConverter.cs

@@ -0,0 +1,87 @@
+//------------------------------------------------------------------------------
+// <copyright file="WbmpConverter.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>                                                                
+//------------------------------------------------------------------------------
+
+namespace System.Web.UI.Design.MobileControls.Util
+{
+    using System;
+    using System.Drawing;
+    using System.Diagnostics;
+    
+    [
+        System.Security.Permissions.SecurityPermission(System.Security.Permissions.SecurityAction.Demand,
+        Flags=System.Security.Permissions.SecurityPermissionFlag.UnmanagedCode)
+    ]
+    [Obsolete("The System.Web.Mobile.dll assembly has been deprecated and should no longer be used. For information about how to develop ASP.NET mobile applications, see http://go.microsoft.com/fwlink/?LinkId=157231.")]
+    internal class WbmpConverter
+    {
+        private static int ExtractMultiByte(Byte[] buffer, ref int cursor)
+        {
+            int sum = 0;
+            do
+            {
+                sum <<= 7;
+                sum += buffer[cursor] & 0x7F;
+            }
+            while((buffer[cursor++] & 0x80) != 0);
+            return sum;
+        }
+        
+        internal static Bitmap Convert(Byte[] buffer)
+        {
+            try
+            {
+                int cursor = 0;
+                int type = buffer[cursor++];
+
+                if(type != 0)
+                {
+                    Debug.Fail("Wbmp is not type 0. (Unsupported)");
+                    return null;
+                }
+                
+                int header = buffer[cursor++];
+                int width = ExtractMultiByte(buffer, ref cursor);
+                int height = ExtractMultiByte(buffer, ref cursor);
+
+                Bitmap bitmap = new Bitmap(width, height);
+                Byte mask = 0x80;
+
+                for(int y = 0; y < height; y++)
+                {
+                    for(int x = 0; x < width; x++)
+                    {
+                        if((buffer[cursor] & mask) == 0)
+                        {
+                            bitmap.SetPixel(x, y, Color.Black);
+                        }
+                        else
+                        {
+                            bitmap.SetPixel(x, y, Color.White);
+                        }
+                        mask >>= 1;
+                        if(mask == 0)
+                        {
+                           mask = 0x80;
+                           cursor++;
+                        }
+                    }
+                    // each row starts at the beginning of an octet
+                    if(mask != 0x80)
+                    {
+                        mask = 0x80;
+                        cursor++;
+                    }
+                }
+                return bitmap;
+            }
+            catch
+            {
+                Debug.Fail("Wbmp file appears to be corrupt.");
+                return null;
+            }
+        }
+    }
+}