/// <summary>Processes a TIFF data sequence.</summary>
/// <param name="reader">
/// the
/// <see cref="Com.Drew.Lang.RandomAccessReader"/>
/// from which the data should be read
/// </param>
/// <param name="handler">
/// the
/// <see cref="TiffHandler"/>
/// that will coordinate processing and accept read values
/// </param>
/// <param name="tiffHeaderOffset">the offset within <code>reader</code> at which the TIFF header starts</param>
/// <exception cref="TiffProcessingException">
/// if an error occurred during the processing of TIFF data that could not be
/// ignored or recovered from
/// </exception>
/// <exception cref="System.IO.IOException">an error occurred while accessing the required data</exception>
/// <exception cref="Com.Drew.Imaging.Tiff.TiffProcessingException"/>
public virtual void ProcessTiff(RandomAccessReader reader, TiffHandler handler, int tiffHeaderOffset)
{
// This must be either "MM" or "II".
short byteOrderIdentifier = reader.GetInt16(tiffHeaderOffset);
if (byteOrderIdentifier == unchecked ((int)(0x4d4d)))
{
// "MM"
reader.SetMotorolaByteOrder(true);
}
else
{
if (byteOrderIdentifier == unchecked ((int)(0x4949)))
{
// "II"
reader.SetMotorolaByteOrder(false);
}
else
{
throw new TiffProcessingException("Unclear distinction between Motorola/Intel byte ordering: " + byteOrderIdentifier);
}
}
// Check the next two values for correctness.
int tiffMarker = reader.GetUInt16(2 + tiffHeaderOffset);
handler.SetTiffMarker(tiffMarker);
int firstIfdOffset = reader.GetInt32(4 + tiffHeaderOffset) + tiffHeaderOffset;
// David Ekholm sent a digital camera image that has this problem
// TODO getLength should be avoided as it causes RandomAccessStreamReader to read to the end of the stream
if (firstIfdOffset >= reader.GetLength() - 1)
{
handler.Warn("First IFD offset is beyond the end of the TIFF data segment -- trying default offset");
// First directory normally starts immediately after the offset bytes, so try that
firstIfdOffset = tiffHeaderOffset + 2 + 2 + 4;
}
ICollection <int> processedIfdOffsets = new HashSet <int>();
ProcessIfd(handler, reader, processedIfdOffsets, firstIfdOffset, tiffHeaderOffset);
handler.Completed(reader, tiffHeaderOffset);
}
private static void ProcessKodakMakernote(KodakMakernoteDirectory directory, int tagValueOffset, RandomAccessReader reader)
{
// Kodak's makernote is not in IFD format. It has values at fixed offsets.
int dataOffset = tagValueOffset + 8;
try
{
directory.SetString(KodakMakernoteDirectory.TagKodakModel, reader.GetString(dataOffset, 8));
directory.SetInt(KodakMakernoteDirectory.TagQuality, reader.GetUInt8(dataOffset + 9));
directory.SetInt(KodakMakernoteDirectory.TagBurstMode, reader.GetUInt8(dataOffset + 10));
directory.SetInt(KodakMakernoteDirectory.TagImageWidth, reader.GetUInt16(dataOffset + 12));
directory.SetInt(KodakMakernoteDirectory.TagImageHeight, reader.GetUInt16(dataOffset + 14));
directory.SetInt(KodakMakernoteDirectory.TagYearCreated, reader.GetUInt16(dataOffset + 16));
directory.SetByteArray(KodakMakernoteDirectory.TagMonthDayCreated, reader.GetBytes(dataOffset + 18, 2));
directory.SetByteArray(KodakMakernoteDirectory.TagTimeCreated, reader.GetBytes(dataOffset + 20, 4));
directory.SetInt(KodakMakernoteDirectory.TagBurstMode2, reader.GetUInt16(dataOffset + 24));
directory.SetInt(KodakMakernoteDirectory.TagShutterMode, reader.GetUInt8(dataOffset + 27));
directory.SetInt(KodakMakernoteDirectory.TagMeteringMode, reader.GetUInt8(dataOffset + 28));
directory.SetInt(KodakMakernoteDirectory.TagSequenceNumber, reader.GetUInt8(dataOffset + 29));
directory.SetInt(KodakMakernoteDirectory.TagFNumber, reader.GetUInt16(dataOffset + 30));
directory.SetLong(KodakMakernoteDirectory.TagExposureTime, reader.GetUInt32(dataOffset + 32));
directory.SetInt(KodakMakernoteDirectory.TagExposureCompensation, reader.GetInt16(dataOffset + 36));
directory.SetInt(KodakMakernoteDirectory.TagFocusMode, reader.GetUInt8(dataOffset + 56));
directory.SetInt(KodakMakernoteDirectory.TagWhiteBalance, reader.GetUInt8(dataOffset + 64));
directory.SetInt(KodakMakernoteDirectory.TagFlashMode, reader.GetUInt8(dataOffset + 92));
directory.SetInt(KodakMakernoteDirectory.TagFlashFired, reader.GetUInt8(dataOffset + 93));
directory.SetInt(KodakMakernoteDirectory.TagIsoSetting, reader.GetUInt16(dataOffset + 94));
directory.SetInt(KodakMakernoteDirectory.TagIso, reader.GetUInt16(dataOffset + 96));
directory.SetInt(KodakMakernoteDirectory.TagTotalZoom, reader.GetUInt16(dataOffset + 98));
directory.SetInt(KodakMakernoteDirectory.TagDateTimeStamp, reader.GetUInt16(dataOffset + 100));
directory.SetInt(KodakMakernoteDirectory.TagColorMode, reader.GetUInt16(dataOffset + 102));
directory.SetInt(KodakMakernoteDirectory.TagDigitalZoom, reader.GetUInt16(dataOffset + 104));
directory.SetInt(KodakMakernoteDirectory.TagSharpness, reader.GetInt8(dataOffset + 107));
}
catch (IOException ex)
{
directory.AddError("Error processing Kodak makernote data: " + ex.Message);
}
}
/// <exception cref="System.IO.IOException"/>
private static void ProcessTag(TiffHandler handler, int tagId, int tagValueOffset, int componentCount, int formatCode, RandomAccessReader reader)
{
switch (formatCode)
{
case TiffDataFormat.CodeUndefined:
{
// this includes exif user comments
handler.SetByteArray(tagId, reader.GetBytes(tagValueOffset, componentCount));
break;
}
case TiffDataFormat.CodeString:
{
handler.SetString(tagId, reader.GetNullTerminatedString(tagValueOffset, componentCount));
break;
}
case TiffDataFormat.CodeRationalS:
{
if (componentCount == 1)
{
handler.SetRational(tagId, new Rational(reader.GetInt32(tagValueOffset), reader.GetInt32(tagValueOffset + 4)));
}
else
{
if (componentCount > 1)
{
Rational[] array = new Rational[componentCount];
for (int 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 TiffDataFormat.CodeRationalU:
{
if (componentCount == 1)
{
handler.SetRational(tagId, new Rational(reader.GetUInt32(tagValueOffset), reader.GetUInt32(tagValueOffset + 4)));
}
else
{
if (componentCount > 1)
{
Rational[] array = new Rational[componentCount];
for (int 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 TiffDataFormat.CodeSingle:
{
if (componentCount == 1)
{
handler.SetFloat(tagId, reader.GetFloat32(tagValueOffset));
}
else
{
float[] array = new float[componentCount];
for (int i = 0; i < componentCount; i++)
{
array[i] = reader.GetFloat32(tagValueOffset + (i * 4));
}
handler.SetFloatArray(tagId, array);
}
break;
}
case TiffDataFormat.CodeDouble:
{
if (componentCount == 1)
{
handler.SetDouble(tagId, reader.GetDouble64(tagValueOffset));
}
else
{
double[] array = new double[componentCount];
for (int i = 0; i < componentCount; i++)
{
array[i] = reader.GetDouble64(tagValueOffset + (i * 4));
}
handler.SetDoubleArray(tagId, array);
}
break;
}
case TiffDataFormat.CodeInt8S:
{
if (componentCount == 1)
{
handler.SetInt8s(tagId, reader.GetInt8(tagValueOffset));
}
else
{
sbyte[] array = new sbyte[componentCount];
for (int i = 0; i < componentCount; i++)
{
array[i] = reader.GetInt8(tagValueOffset + i);
}
handler.SetInt8sArray(tagId, array);
}
break;
}
case TiffDataFormat.CodeInt8U:
{
if (componentCount == 1)
{
handler.SetInt8u(tagId, reader.GetUInt8(tagValueOffset));
}
else
{
short[] array = new short[componentCount];
for (int i = 0; i < componentCount; i++)
{
array[i] = reader.GetUInt8(tagValueOffset + i);
}
handler.SetInt8uArray(tagId, array);
}
break;
}
case TiffDataFormat.CodeInt16S:
{
if (componentCount == 1)
{
handler.SetInt16s(tagId, (int)reader.GetInt16(tagValueOffset));
}
else
{
short[] array = new short[componentCount];
for (int i = 0; i < componentCount; i++)
{
array[i] = reader.GetInt16(tagValueOffset + (i * 2));
}
handler.SetInt16sArray(tagId, array);
}
break;
}
case TiffDataFormat.CodeInt16U:
{
if (componentCount == 1)
{
handler.SetInt16u(tagId, reader.GetUInt16(tagValueOffset));
}
else
{
int[] array = new int[componentCount];
for (int i = 0; i < componentCount; i++)
{
array[i] = reader.GetUInt16(tagValueOffset + (i * 2));
}
handler.SetInt16uArray(tagId, array);
}
break;
}
case TiffDataFormat.CodeInt32S:
{
// NOTE 'long' in this case means 32 bit, not 64
if (componentCount == 1)
{
handler.SetInt32s(tagId, reader.GetInt32(tagValueOffset));
}
else
{
int[] array = new int[componentCount];
for (int i = 0; i < componentCount; i++)
{
array[i] = reader.GetInt32(tagValueOffset + (i * 4));
}
handler.SetInt32sArray(tagId, array);
}
break;
}
case TiffDataFormat.CodeInt32U:
{
// NOTE 'long' in this case means 32 bit, not 64
if (componentCount == 1)
{
handler.SetInt32u(tagId, reader.GetUInt32(tagValueOffset));
}
else
{
long[] array = new long[componentCount];
for (int i = 0; i < componentCount; i++)
{
array[i] = reader.GetUInt32(tagValueOffset + (i * 4));
}
handler.SetInt32uArray(tagId, array);
}
break;
}
default:
{
handler.Error(Sharpen.Extensions.StringFormat("Unknown format code %d for tag %d", formatCode, tagId));
break;
}
}
}
private static void ProcessTag(Com.Drew.Metadata.Directory directory, int tagType, int tagValueOffset, int componentCount, int formatCode, RandomAccessReader reader)
{
switch (formatCode)
{
case FmtUndefined:
{
// Directory simply stores raw values
// The display side uses a Descriptor class per directory to turn the raw values into 'pretty' descriptions
// this includes exif user comments
directory.SetByteArray(tagType, reader.GetBytes(tagValueOffset, componentCount));
break;
}
case FmtString:
{
string @string = reader.GetNullTerminatedString(tagValueOffset, componentCount);
directory.SetString(tagType, @string);
break;
}
case FmtSrational:
{
if (componentCount == 1)
{
directory.SetRational(tagType, new Rational(reader.GetInt32(tagValueOffset), reader.GetInt32(tagValueOffset + 4)));
}
else
{
if (componentCount > 1)
{
Rational[] rationals = new Rational[componentCount];
for (int i = 0; i < componentCount; i++)
{
rationals[i] = new Rational(reader.GetInt32(tagValueOffset + (8 * i)), reader.GetInt32(tagValueOffset + 4 + (8 * i)));
}
directory.SetRationalArray(tagType, rationals);
}
}
break;
}
case FmtUrational:
{
if (componentCount == 1)
{
directory.SetRational(tagType, new Rational(reader.GetUInt32(tagValueOffset), reader.GetUInt32(tagValueOffset + 4)));
}
else
{
if (componentCount > 1)
{
Rational[] rationals = new Rational[componentCount];
for (int i = 0; i < componentCount; i++)
{
rationals[i] = new Rational(reader.GetUInt32(tagValueOffset + (8 * i)), reader.GetUInt32(tagValueOffset + 4 + (8 * i)));
}
directory.SetRationalArray(tagType, rationals);
}
}
break;
}
case FmtSingle:
{
if (componentCount == 1)
{
directory.SetFloat(tagType, reader.GetFloat32(tagValueOffset));
}
else
{
float[] floats = new float[componentCount];
for (int i = 0; i < componentCount; i++)
{
floats[i] = reader.GetFloat32(tagValueOffset + (i * 4));
}
directory.SetFloatArray(tagType, floats);
}
break;
}
case FmtDouble:
{
if (componentCount == 1)
{
directory.SetDouble(tagType, reader.GetDouble64(tagValueOffset));
}
else
{
double[] doubles = new double[componentCount];
for (int i = 0; i < componentCount; i++)
{
doubles[i] = reader.GetDouble64(tagValueOffset + (i * 4));
}
directory.SetDoubleArray(tagType, doubles);
}
break;
}
case FmtSbyte:
{
//
// Note that all integral types are stored as int32 internally (the largest supported by TIFF)
//
if (componentCount == 1)
{
directory.SetInt(tagType, reader.GetInt8(tagValueOffset));
}
else
{
int[] bytes = new int[componentCount];
for (int i = 0; i < componentCount; i++)
{
bytes[i] = reader.GetInt8(tagValueOffset + i);
}
directory.SetIntArray(tagType, bytes);
}
break;
}
case FmtByte:
{
if (componentCount == 1)
{
directory.SetInt(tagType, reader.GetUInt8(tagValueOffset));
}
else
{
int[] bytes = new int[componentCount];
for (int i = 0; i < componentCount; i++)
{
bytes[i] = reader.GetUInt8(tagValueOffset + i);
}
directory.SetIntArray(tagType, bytes);
}
break;
}
case FmtUshort:
{
if (componentCount == 1)
{
int i = reader.GetUInt16(tagValueOffset);
directory.SetInt(tagType, i);
}
else
{
int[] ints = new int[componentCount];
for (int i = 0; i < componentCount; i++)
{
ints[i] = reader.GetUInt16(tagValueOffset + (i * 2));
}
directory.SetIntArray(tagType, ints);
}
break;
}
case FmtSshort:
{
if (componentCount == 1)
{
int i = reader.GetInt16(tagValueOffset);
directory.SetInt(tagType, i);
}
else
{
int[] ints = new int[componentCount];
for (int i = 0; i < componentCount; i++)
{
ints[i] = reader.GetInt16(tagValueOffset + (i * 2));
}
directory.SetIntArray(tagType, ints);
}
break;
}
case FmtSlong:
case FmtUlong:
{
// NOTE 'long' in this case means 32 bit, not 64
if (componentCount == 1)
{
int i = reader.GetInt32(tagValueOffset);
directory.SetInt(tagType, i);
}
else
{
int[] ints = new int[componentCount];
for (int i = 0; i < componentCount; i++)
{
ints[i] = reader.GetInt32(tagValueOffset + (i * 4));
}
directory.SetIntArray(tagType, ints);
}
break;
}
default:
{
directory.AddError("Unknown format code " + formatCode + " for tag " + tagType);
break;
}
}
}
