Esempio n. 1
0
        public override ImageData Read(IBinaryStream stream, ImageMetaData info)
        {
            var meta = (MgrMetaData)info;

            stream.Position = meta.Offset;
            var data = new byte[meta.UnpackedSize];

            if (data.Length != MgrOpener.Decompress(stream.AsStream, data))
            {
                throw new InvalidFormatException();
            }
            if (meta.BPP != 32)
            {
                using (var bmp = new BinMemoryStream(data, stream.Name))
                    return(Bmp.Read(bmp, info));
            }
            // special case for 32bpp bitmaps with alpha-channel
            int stride = (int)meta.Width * 4;
            var pixels = new byte[stride * (int)meta.Height];
            int src    = LittleEndian.ToInt32(data, 0xA);

            for (int dst = stride * ((int)meta.Height - 1); dst >= 0; dst -= stride)
            {
                Buffer.BlockCopy(data, src, pixels, dst, stride);
                src += stride;
            }
            return(ImageData.Create(info, PixelFormats.Bgra32, null, pixels));
        }
Esempio n. 2
0
        public override ImageMetaData ReadMetaData(IBinaryStream stream)
        {
            int count = stream.ReadInt16();

            if (count <= 0 || count >= 0x100)
            {
                return(null);
            }
            int offset;

            if (count > 1)
            {
                offset = stream.ReadInt32();
                if (offset != 2 + count * 4)
                {
                    return(null);
                }
            }
            else
            {
                offset = 2;
            }
            stream.Position = offset;
            int unpacked_size = stream.ReadInt32();
            int packed_size   = stream.ReadInt32();

            offset += 8;
            if (offset + packed_size > stream.Length)
            {
                return(null);
            }
            byte[] header = new byte[0x36];
            if (0x36 != MgrOpener.Decompress(stream.AsStream, header) ||
                header[0] != 'B' || header[1] != 'M')
            {
                return(null);
            }
            using (var bmp = new BinMemoryStream(header, stream.Name))
            {
                var info = Bmp.ReadMetaData(bmp);
                if (null == info)
                {
                    return(null);
                }
                return(new MgrMetaData
                {
                    Width = info.Width,
                    Height = info.Height,
                    BPP = info.BPP,
                    Offset = offset,
                    PackedSize = packed_size,
                    UnpackedSize = unpacked_size,
                });
            }
        }