public static void FromFile(Stream stream, UInt16 lang, ResourceSource source, ResIconDir resDir)
{
if (stream.Length < Marshal.SizeOf(typeof(IconDirectory)))
{
return;
}
BinaryReader rdr = new BinaryReader(stream);
IconDirectory?tDir = ReadIcoHeader(rdr);
if (tDir == null)
{
return;
}
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();
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);
Size dimensions = new Size(img.bWidth == 0 ? 256 : img.bWidth, img.bHeight == 0 ? 256 : img.bHeight);
IconCursorImageResourceData memberImageData = factory.FromResource(null, data) as IconCursorImageResourceData;
IconDirectoryMember member = new IconDirectoryMember(memberImageData, dimensions, img.bColorCount, img.bReserved, img.wPlanes, img.wBitCount, img.dwBytesInRes);
resDir.AddUpdateMemberImage(member);
}
}
private static IconImageResourceDataFactory GetIconImageFactory()
{
if (_factory != null)
{
return(_factory);
}
ResourceTypeIdentifier typeId = new ResourceTypeIdentifier(new IntPtr((int)Win32ResourceType.IconImage));
ResourceDataFactory[] factories = ResourceDataFactory.GetFactoriesForType(typeId);
foreach (ResourceDataFactory f in factories)
{
IconImageResourceDataFactory iif = f as IconImageResourceDataFactory;
if (iif != null)
{
return(_factory = iif);
}
}
return(_factory);
}
