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//------------------------------------------------------------------------------
// <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;
}
}
}
}
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