iTextSharp.text.pdf.codec.GifImage.ReadHeader C# (CSharp) Method

        protected void ReadHeader()
        {
            StringBuilder id = new StringBuilder();
            for (int i = 0; i < 6; i++)
                id.Append((char)inp.ReadByte());
            if (!id.ToString().StartsWith("GIF8")) {
                throw new IOException(MessageLocalization.GetComposedMessage("gif.signature.nor.found"));
            }

            ReadLSD();
            if (gctFlag) {
                m_global_table = ReadColorTable(m_gbpc);
            }
        }