private static IconImageResourceDataFactory GetIconImageFactory()
{
IconImageResourceDataFactory factory = null;
ResourceTypeIdentifier typeId = new ResourceTypeIdentifier(new IntPtr((int)Win32ResourceType.IconImage));
ResourceDataFactory[] factories = ResourceDataFactory.GetFactoriesForType(typeId);
foreach (ResourceDataFactory f in factories)
{
if (f is IconImageResourceDataFactory)
{
factory = f as IconImageResourceDataFactory;
break;
}
}
if (factory == null)
{
throw ME(new ApplicationException("Unable to locate IconImageResourceDataFactory"));
}
return(factory);
}
public static Boolean TryCreateFromFile(Stream stream, String extension, ResourceSource source, out IconDirectoryResourceData typed)
{
typed = null;
if (extension != "ico")
{
throw MEEx(extension);
}
if (stream.Length < Marshal.SizeOf(typeof(IconDirectory)))
{
return(false);
}
BinaryReader rdr = new BinaryReader(stream);
IconDirectory?tDir = ReadIcoHeader(rdr);
if (tDir == null)
{
return(false);
}
IconDirectory dir = tDir.Value;
///////////////////////////////
// rdr is now at the beginning of the array of FileIconDirectoryMembers
FileIconDirectoryEntry[] subImages = new FileIconDirectoryEntry[dir.wCount];
for (int i = 0; i < dir.wCount; i++)
{
subImages[i] = ReadFileDirMember(rdr);
}
/////////////////////////////
// now for image data itself
IconImageResourceDataFactory factory = GetIconImageFactory();
IconCursorImageResourceData[] images = new IconCursorImageResourceData[dir.wCount];
String[] descs = new String[dir.wCount];
for (int i = 0; i < dir.wCount; i++)
{
FileIconDirectoryEntry img = subImages[i];
stream.Seek(img.dwImageOffset, SeekOrigin.Begin);
Byte[] data = new Byte[img.dwBytesInRes];
stream.Read(data, 0, (int)img.dwBytesInRes);
images[i] = factory.FromResource(null, data) as IconCursorImageResourceData;
String description = String.Format(
Cult.InvariantCulture,
"{0}x{1} {2}-bit",
img.bWidth == 0 ? 256 : img.bWidth,
img.bHeight == 0 ? 256 : img.bHeight,
img.wBitCount
);
descs[i] = description;
}
Byte[] reconstructed = ReconstructRawData(dir, subImages, images, source);
IconDirectoryResourceData retval = new IconDirectoryResourceData(null, reconstructed);
for (int i = 0; i < images.Length; i++)
{
retval.UnderlyingMembers.Add(new IconDirectoryMember(descs[i], images[i]));
}
/////////////////////////////
typed = retval;
return(true);
}