public static void WriteImage(Bitmap src, Stream stream)
{
IcnsType imageType = IcnsType.FindType(src.Width, src.Height, 32, IcnsType.TypeDetails.None);
if (imageType == null)
{
throw new NotSupportedException($"Invalid/unsupported source: {src.Width}x{src.Height}");
}
Write4Bytes(stream, ICNS_MAGIC);
Write4Bytes(stream, 4 + 4 + 4 + 4 + 4 * imageType.Width * imageType.Height + 4 + 4 + imageType.Width * imageType.Height);
Write4Bytes(stream, imageType.Type);
Write4Bytes(stream, 4 + 4 + 4 * imageType.Width * imageType.Height);
BitmapData bitmapData = src.LockBits(new Rectangle(0, 0, src.Width, src.Height), ImageLockMode.ReadOnly, PixelFormat.Format32bppArgb);
// the image
for (int y = 0; y < src.Height; y++)
{
for (int x = 0; x < src.Width; x++)
{
uint argb = IcnsDecoder.GetPixel(bitmapData, x, y);
stream.WriteByte(0);
stream.WriteByte((byte)((argb & 0x00ff0000) >> 16));
stream.WriteByte((byte)((argb & 0x0000ff00) >> 8));
stream.WriteByte((byte)((argb & 0x000000ff) >> 0));
}
}
// mask
IcnsType maskType = IcnsType.FindType(src.Width, src.Height, 8, IcnsType.TypeDetails.Mask);
Write4Bytes(stream, maskType.Type);
Write4Bytes(stream, 4 + 4 + imageType.Width * imageType.Width);
for (int y = 0; y < src.Height; y++)
{
for (int x = 0; x < src.Width; x++)
{
uint argb = IcnsDecoder.GetPixel(bitmapData, x, y);
stream.WriteByte((byte)((argb & 0xff000000) >> 24));
}
}
}
public static IcnsImage GetImage(Stream stream)
{
IcnsElement[] icnsContents = ReadImage(stream);
List <IcnsImage> result = IcnsDecoder.DecodeAllImages(icnsContents);
if (result.Count <= 0)
{
throw new NotSupportedException("No icons in ICNS file");
}
IcnsImage max = null;
foreach (IcnsImage bitmap in result)
{
if (bitmap.Bitmap != null && (max == null || (bitmap.Bitmap.Width > bitmap.Bitmap.Height)))
{
max = bitmap;
}
}
return(max);
}
public static List <IcnsImage> GetImages(Stream stream)
{
IcnsElement[] icnsContents = ReadImage(stream);
return(IcnsDecoder.DecodeAllImages(icnsContents));
}
