Exemplo n.º 1
0
        /// <exception cref="System.IO.IOException"/>
        private static void ProcessTag(ITiffHandler handler, int tagId, int tagValueOffset, int componentCount, TiffDataFormatCode formatCode, IndexedReader reader)
        {
            switch (formatCode)
            {
            case TiffDataFormatCode.Undefined:
            {
                // this includes exif user comments
                handler.SetByteArray(tagId, reader.GetBytes(tagValueOffset, componentCount));
                break;
            }

            case TiffDataFormatCode.String:
            {
                handler.SetString(tagId, reader.GetNullTerminatedStringValue(tagValueOffset, componentCount));
                break;
            }

            case TiffDataFormatCode.RationalS:
            {
                if (componentCount == 1)
                {
                    handler.SetRational(tagId, new Rational(reader.GetInt32(tagValueOffset), reader.GetInt32(tagValueOffset + 4)));
                }
                else if (componentCount > 1)
                {
                    var array = new Rational[componentCount];
                    for (var i = 0; i < componentCount; i++)
                    {
                        array[i] = new Rational(reader.GetInt32(tagValueOffset + 8 * i), reader.GetInt32(tagValueOffset + 4 + 8 * i));
                    }
                    handler.SetRationalArray(tagId, array);
                }
                break;
            }

            case TiffDataFormatCode.RationalU:
            {
                if (componentCount == 1)
                {
                    handler.SetRational(tagId, new Rational(reader.GetUInt32(tagValueOffset), reader.GetUInt32(tagValueOffset + 4)));
                }
                else if (componentCount > 1)
                {
                    var array = new Rational[componentCount];
                    for (var i = 0; i < componentCount; i++)
                    {
                        array[i] = new Rational(reader.GetUInt32(tagValueOffset + 8 * i), reader.GetUInt32(tagValueOffset + 4 + 8 * i));
                    }
                    handler.SetRationalArray(tagId, array);
                }
                break;
            }

            case TiffDataFormatCode.Single:
            {
                if (componentCount == 1)
                {
                    handler.SetFloat(tagId, reader.GetFloat32(tagValueOffset));
                }
                else
                {
                    var array = new float[componentCount];
                    for (var i = 0; i < componentCount; i++)
                    {
                        array[i] = reader.GetFloat32(tagValueOffset + i * 4);
                    }
                    handler.SetFloatArray(tagId, array);
                }
                break;
            }

            case TiffDataFormatCode.Double:
            {
                if (componentCount == 1)
                {
                    handler.SetDouble(tagId, reader.GetDouble64(tagValueOffset));
                }
                else
                {
                    var array = new double[componentCount];
                    for (var i = 0; i < componentCount; i++)
                    {
                        array[i] = reader.GetDouble64(tagValueOffset + i * 4);
                    }
                    handler.SetDoubleArray(tagId, array);
                }
                break;
            }

            case TiffDataFormatCode.Int8S:
            {
                if (componentCount == 1)
                {
                    handler.SetInt8S(tagId, reader.GetSByte(tagValueOffset));
                }
                else
                {
                    var array = new sbyte[componentCount];
                    for (var i = 0; i < componentCount; i++)
                    {
                        array[i] = reader.GetSByte(tagValueOffset + i);
                    }
                    handler.SetInt8SArray(tagId, array);
                }
                break;
            }

            case TiffDataFormatCode.Int8U:
            {
                if (componentCount == 1)
                {
                    handler.SetInt8U(tagId, reader.GetByte(tagValueOffset));
                }
                else
                {
                    var array = new byte[componentCount];
                    for (var i = 0; i < componentCount; i++)
                    {
                        array[i] = reader.GetByte(tagValueOffset + i);
                    }
                    handler.SetInt8UArray(tagId, array);
                }
                break;
            }

            case TiffDataFormatCode.Int16S:
            {
                if (componentCount == 1)
                {
                    handler.SetInt16S(tagId, reader.GetInt16(tagValueOffset));
                }
                else
                {
                    var array = new short[componentCount];
                    for (var i = 0; i < componentCount; i++)
                    {
                        array[i] = reader.GetInt16(tagValueOffset + i * 2);
                    }
                    handler.SetInt16SArray(tagId, array);
                }
                break;
            }

            case TiffDataFormatCode.Int16U:
            {
                if (componentCount == 1)
                {
                    handler.SetInt16U(tagId, reader.GetUInt16(tagValueOffset));
                }
                else
                {
                    var array = new ushort[componentCount];
                    for (var i = 0; i < componentCount; i++)
                    {
                        array[i] = reader.GetUInt16(tagValueOffset + i * 2);
                    }
                    handler.SetInt16UArray(tagId, array);
                }
                break;
            }

            case TiffDataFormatCode.Int32S:
            {
                // NOTE 'long' in this case means 32 bit, not 64
                if (componentCount == 1)
                {
                    handler.SetInt32S(tagId, reader.GetInt32(tagValueOffset));
                }
                else
                {
                    var array = new int[componentCount];
                    for (var i = 0; i < componentCount; i++)
                    {
                        array[i] = reader.GetInt32(tagValueOffset + i * 4);
                    }
                    handler.SetInt32SArray(tagId, array);
                }
                break;
            }

            case TiffDataFormatCode.Int32U:
            {
                // NOTE 'long' in this case means 32 bit, not 64
                if (componentCount == 1)
                {
                    handler.SetInt32U(tagId, reader.GetUInt32(tagValueOffset));
                }
                else
                {
                    var array = new uint[componentCount];
                    for (var i = 0; i < componentCount; i++)
                    {
                        array[i] = reader.GetUInt32(tagValueOffset + i * 4);
                    }
                    handler.SetInt32UArray(tagId, array);
                }
                break;
            }

            default:
            {
                handler.Error($"Invalid TIFF tag format code {formatCode} for tag 0x{tagId:X4}");
                break;
            }
            }
        }