示例#1
0
        protected override byte[] GetContent()
        {
            var data = Data;

            foreach (var encoder in Encoders)
            {
                data = encoder.Encode(data);
            }

            var sb = new StringBuilder();

            sb.Append("<</Type /XObject\r\n");
            sb.Append("  /Subtype /Image\r\n");
            sb.Append($"  /Width {Width}\r\n");
            sb.Append($"  /Height {Height}\r\n");
            sb.Append($"  /ColorSpace /{ColorSpace.ToPatternName()}\r\n");
            sb.Append($"  /BitsPerComponent {BitsPerComponent}\r\n");
            sb.Append($"  /Length {data.Length}");
            if (Encoders.Count > 0)
            {
                sb.Append("\r\n");
                sb.Append($"  /Filter {Encoders.AsEncoderList()}");
            }

            sb.Append(">>");

            var bytes = new List <byte>();

            bytes.AddRange(sb.ToString().GetNewLineBytes());
            bytes.AddRange("stream".GetNewLineBytes());
            bytes.AddRange(data);
            if (data.Length >= 2 &&
                data[data.Length - 2] != '\r' &&
                data[data.Length - 1] != '\n')
            {
                // add newline if not already present
                bytes.AddRange("\r\n".GetBytes());
            }

            bytes.AddRange("endstream".GetNewLineBytes());

            return(bytes.ToArray());
        }