public override ImageData Read(IBinaryStream stream, ImageMetaData info)
{
using (var reader = new SbiReader(stream, (SbiMetaData)info))
{
reader.Unpack();
return(ImageData.Create(info, reader.Format, reader.Palette, reader.Data, reader.Stride));
}
}
public override ImageData Read(IBinaryStream stream, ImageMetaData info)
{
var meta = (MfcMetaData)info;
// XXX implemented like in reference code, width is expected to be even.
var alpha = new byte[info.Width * info.Height / 2];
stream.Position = 0x18;
RleUnpack(stream.AsStream, meta.AlphaSize - 0x18, alpha);
byte[] pixels;
using (var reg = new StreamRegion(stream.AsStream, meta.AlphaSize, true))
using (var sbi = new BinaryStream(reg, stream.Name))
using (var reader = new SbiReader(sbi, meta.BaseInfo))
{
reader.Unpack();
if (meta.BaseInfo.BPP != 32)
{
var bitmap = BitmapSource.Create((int)info.Width, (int)info.Height, ImageData.DefaultDpiX, ImageData.DefaultDpiY,
reader.Format, reader.Palette, reader.Data, reader.Stride);
bitmap = new FormatConvertedBitmap(bitmap, PixelFormats.Bgra32, null, 0);
int stride = (int)info.Width * 4;
pixels = new byte[stride * (int)info.Height];
bitmap.CopyPixels(pixels, stride, 0);
}
else
{
pixels = reader.Data;
}
}
using (var mem = new MemoryStream(alpha))
using (var bits = new LsbBitStream(mem))
{
for (int i = 3; i < pixels.Length; i += 4)
{
pixels[i] = (byte)(bits.GetBits(4) * 0x11);
}
}
return(ImageData.Create(info, PixelFormats.Bgra32, null, pixels));
}