WbmpConverter.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / MIT / System / Web / UI / MobileControls / Design / Util / WbmpConverter.cs / 1305376 / WbmpConverter.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

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;
            }
        }
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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