public DNGFile(string aFileName, bool HeaderOnly)
: base(aFileName)
{
byte a = mFileReader.ReadByte();
byte b = mFileReader.ReadByte();
bool fileIsLittleEndian;
if (a == b && b == 'I')
{
fileIsLittleEndian = true;
}
else
if (a == b && b == 'M')
{
fileIsLittleEndian = false;
}
else
{
throw new FileLoadException("Could not determine file endianess. Is this a proper TIFF/PEF file?", aFileName);
}
mEndianSwap = fileIsLittleEndian != BitConverter.IsLittleEndian;
ushort magicNumber = ReadUI2();
if (magicNumber != 42)
{
throw new FileLoadException("This is not a valid TIFF/PEF file: Magic number is not 42.", aFileName);
}
uint offsetToFirstIFD = ReadUI4();
mFile.Seek(offsetToFirstIFD, SeekOrigin.Begin);
List <ImageFileDirectory> ifds = new List <ImageFileDirectory>();
while (true)
{
ImageFileDirectory ifd = new ImageFileDirectory(this);
ifds.Add(ifd);
uint offsetToNext = ReadUI4();
if (offsetToNext == 0)
{
break;
}
Seek(offsetToNext, System.IO.SeekOrigin.Begin);
}
IFDSubIFDs sub = ifds[0].GetEntry <IFDSubIFDs>();
mWidth = (int)sub.Value[0].GetEntry <IFDImageWidth>().Value;
mHeight = (int)sub.Value[0].GetEntry <IFDImageLength>().Value;
IFDExif exif = ifds[0].GetEntry <IFDExif>();
mISO = exif.GetEntry <ExifEntry.ExifISOSpeedRatings>().Value;
mBitDepth = sub.Value[0].GetEntry <IFDBitsPerSample>().Value;
mBayerPattern = sub.Value[0].GetEntry <IFDCFAPattern>().Value;
mBayerWidth = sub.Value[0].GetEntry <IFDCFARepeatPatternDim>().Value[0];
mBayerHeight = sub.Value[0].GetEntry <IFDCFARepeatPatternDim>().Value[1];
mWhiteLevel = sub.Value[0].GetEntry <IFDDNGWhiteLevel>();
mBlackLevel = sub.Value[0].GetEntry <IFDDNGBlackLevel>();
mLinearizationTable = sub.Value[0].GetEntry <IFDDNGLinearizationTable>();
mMinVal = new float[3];
mMinVal[0] = (float)mBlackLevel.Value[0].Value;
mMinVal[1] = (float)mBlackLevel.Value[mBlackLevel.Value.Length > 1 ? 1 : 0].Value;
mMinVal[2] = (float)mBlackLevel.Value[mBlackLevel.Value.Length > 3 ? 3 : 0].Value;
mMaxVal = new float[3];
mMaxVal[0] = (float)mWhiteLevel.Value[0];
mMaxVal[1] = (float)mWhiteLevel.Value[mWhiteLevel.Value.Length > 1 ? 1 : 0];
mMaxVal[2] = (float)mWhiteLevel.Value[mWhiteLevel.Value.Length > 3 ? 3 : 0];
mAsShotNeutral = ifds[0].GetEntry <IFDDNGAsShotNeutral>();
}
public DNGColorSpec(uint aChannels, ImageFileDirectory ifd0, ImageFileDirectory raw)
{
fChannels = aChannels;
if (GetTag <IFDDNGCalibrationIlluminant1>(ifd0, raw) != null)
{
fTemperature1 = ConvertIlluminantToTemperature(GetTag <IFDDNGCalibrationIlluminant1>(ifd0, raw).Value);
}
else
{
fTemperature1 = 0.0;
}
if (GetTag <IFDDNGCalibrationIlluminant2>(ifd0, raw) != null)
{
fTemperature2 = ConvertIlluminantToTemperature(GetTag <IFDDNGCalibrationIlluminant2>(ifd0, raw).Value);
}
else
{
fTemperature2 = 0.0;
}
fColorMatrix1 = GetTag <IFDDNGColorMatrix1>(ifd0, raw)?.Matrix;
if (fColorMatrix1 == null)
{
fColorMatrix1 = DNGMatrix.Identity(fChannels); //best choice if nothing is given...
}
fColorMatrix2 = GetTag <IFDDNGColorMatrix2>(ifd0, raw)?.Matrix;
if (fColorMatrix2 == null)
{
fColorMatrix2 = new DNGMatrix();
}
fForwardMatrix1 = GetTag <IFDDNGForwardMatrix1>(ifd0, raw)?.Matrix;
if (fForwardMatrix1 == null)
{
fForwardMatrix1 = new DNGMatrix();
}
fForwardMatrix2 = GetTag <IFDDNGForwardMatrix2>(ifd0, raw)?.Matrix;
if (fForwardMatrix2 == null)
{
fForwardMatrix2 = new DNGMatrix();
}
fReductionMatrix1 = GetTag <IFDDNGReductionMatrix1>(ifd0, raw)?.Matrix;
if (fReductionMatrix1 == null)
{
fReductionMatrix1 = new DNGMatrix();
}
fReductionMatrix2 = GetTag <IFDDNGReductionMatrix2>(ifd0, raw)?.Matrix;
if (fReductionMatrix2 == null)
{
fReductionMatrix2 = new DNGMatrix();
}
fCameraCalibration1 = GetTag <IFDDNGCameraCalibration1>(ifd0, raw)?.Matrix;
fCameraCalibration2 = GetTag <IFDDNGCameraCalibration1>(ifd0, raw)?.Matrix;
if (fCameraCalibration1 == null)
{
fCameraCalibration1 = DNGMatrix.Identity(fChannels);
}
if (fCameraCalibration2 == null)
{
fCameraCalibration2 = DNGMatrix.Identity(fChannels);
}
fAnalogBalance = GetTag <IFDDNGAnalogBalance>(ifd0, raw)?.Vector.AsDiagonal();
if (fAnalogBalance == null)
{
fAnalogBalance = DNGMatrix.Identity(fChannels);
}
fForwardMatrix1 = NormalizeForwardMatrix(fForwardMatrix1);
fColorMatrix1 = fAnalogBalance * fCameraCalibration1 * fColorMatrix1;
if (fColorMatrix2.IsEmpty() ||
fTemperature1 <= 0.0 ||
fTemperature2 <= 0.0 ||
fTemperature1 == fTemperature2)
{
fTemperature1 = 5000.0;
fTemperature2 = 5000.0;
fColorMatrix2 = fColorMatrix1;
fForwardMatrix2 = fForwardMatrix1;
fReductionMatrix2 = fReductionMatrix1;
fCameraCalibration2 = fCameraCalibration1;
}
else
{
fForwardMatrix2 = NormalizeForwardMatrix(fForwardMatrix2);
fColorMatrix2 = fAnalogBalance * fCameraCalibration2 * fColorMatrix2;
// Swap values if temperatures are out of order.
if (fTemperature1 > fTemperature2)
{
double temp = fTemperature1;
fTemperature1 = fTemperature2;
fTemperature2 = temp;
DNGMatrix T = fColorMatrix1;
fColorMatrix1 = fColorMatrix2;
fColorMatrix2 = T;
T = fForwardMatrix1;
fForwardMatrix1 = fForwardMatrix2;
fForwardMatrix2 = T;
T = fReductionMatrix1;
fReductionMatrix1 = fReductionMatrix2;
fReductionMatrix2 = T;
T = fCameraCalibration1;
fCameraCalibration1 = fCameraCalibration2;
fCameraCalibration2 = T;
}
}
IFDDNGAsShotNeutral neutral = GetTag <IFDDNGAsShotNeutral>(ifd0, raw);
IFDDNGAsShotWhiteXY asShot = GetTag <IFDDNGAsShotWhiteXY>(ifd0, raw);
DNGxyCoord white;
if (asShot == null)
{
if (neutral == null)
{
throw new ArgumentException("The DNG spec says that one of the As Shot White balance tags must be present.");
}
DNGVector vec = new DNGVector((uint)neutral.Value.Length);
for (uint c = 0; c < neutral.Value.Length; c++)
{
vec[c] = neutral.Value[c].Value;
}
double unify = 1.0 / vec.MaxEntry();
vec = unify * vec;
white = NeutralToXY(vec);
}
else
{
double x = asShot.Value[0].Value;
double y = asShot.Value[1].Value;
white = new DNGxyCoord(x, y);
}
WhiteXY = white;
}
public DNGFile(string aFileName)
: base(aFileName)
{
byte a = mFileReader.ReadByte();
byte b = mFileReader.ReadByte();
bool fileIsLittleEndian;
if (a == b && b == 'I')
{
fileIsLittleEndian = true;
}
else
if (a == b && b == 'M')
{
fileIsLittleEndian = false;
}
else
{
throw new FileLoadException("Could not determine file endianess. Is this a proper TIFF/PEF file?", aFileName);
}
mEndianSwap = fileIsLittleEndian != BitConverter.IsLittleEndian;
ushort magicNumber = ReadUI2();
if (magicNumber != 42)
{
throw new FileLoadException("This is not a valid TIFF/PEF file: Magic number is not 42.", aFileName);
}
uint offsetToFirstIFD = ReadUI4();
mFile.Seek(offsetToFirstIFD, SeekOrigin.Begin);
List <ImageFileDirectory> ifds = new List <ImageFileDirectory>();
while (true)
{
ImageFileDirectory ifd = new ImageFileDirectory(this);
ifds.Add(ifd);
uint offsetToNext = ReadUI4();
if (offsetToNext == 0)
{
break;
}
Seek(offsetToNext, System.IO.SeekOrigin.Begin);
}
IFDDNGVersion version = ifds[0].GetEntry <IFDDNGVersion>();
isDNGVersionLarge = version == null;
if (version != null)
{
isDNGVersionLarge = version.Value[1] > 1;
}
IFDSubIFDs sub = ifds[0].GetEntry <IFDSubIFDs>();
mWidth = (int)sub.Value[0].GetEntry <IFDImageWidth>().Value;
mHeight = (int)sub.Value[0].GetEntry <IFDImageLength>().Value;
IFDExif exif = ifds[0].GetEntry <IFDExif>();
mISO = exif.GetEntry <ExifEntry.ExifISOSpeedRatings>().Value;
mBitDepth = sub.Value[0].GetEntry <IFDBitsPerSample>().Value;
mBayerPattern = sub.Value[0].GetEntry <IFDCFAPattern>().Value;
mBayerWidth = sub.Value[0].GetEntry <IFDCFARepeatPatternDim>().Value[0];
mBayerHeight = sub.Value[0].GetEntry <IFDCFARepeatPatternDim>().Value[1];
mWhiteLevel = sub.Value[0].GetEntry <IFDDNGWhiteLevel>();
mBlackLevel = sub.Value[0].GetEntry <IFDDNGBlackLevel>();
mAsShotNeutral = sub.Value[0].GetEntry <IFDDNGAsShotNeutral>();
mLinearizationTable = sub.Value[0].GetEntry <IFDDNGLinearizationTable>();
mMinVal = new float[3];
mMinVal[0] = (float)mBlackLevel.Value[0].Value;
mMinVal[1] = (float)mBlackLevel.Value[mBlackLevel.Value.Length > 1 ? 1 : 0].Value;
mMinVal[2] = (float)mBlackLevel.Value[mBlackLevel.Value.Length > 3 ? 3 : 0].Value;
mMaxVal = new float[3];
mMaxVal[0] = (float)mWhiteLevel.Value[0];
mMaxVal[1] = (float)mWhiteLevel.Value[mWhiteLevel.Value.Length > 1 ? 1 : 0];
mMaxVal[2] = (float)mWhiteLevel.Value[mWhiteLevel.Value.Length > 3 ? 3 : 0];
int tileWidth = (int)sub.Value[0].GetEntry <IFDTileWidth>().Value;
int tileHeight = (int)sub.Value[0].GetEntry <IFDTileLength>().Value;
uint[] offsets = sub.Value[0].GetEntry <IFDTileOffsets>().Value;
uint[] byteCounts = sub.Value[0].GetEntry <IFDTileByteCounts>().Value;
mRawImage = new ushort[mHeight, mWidth];
int row = 0;
int col = 0;
for (int tile = 0; tile < offsets.Length; tile++)
{
byte[] data;
Seek(offsets[tile], SeekOrigin.Begin);
data = mFileReader.ReadBytes((int)byteCounts[tile]);
MemoryStream ms = new MemoryStream(data);
ms.Seek(0, SeekOrigin.Begin);
jhead jh = new jhead();
int ret = ljpeg_start(jh, 0, ms);
int jrow, jcol;
if (ret > 0 && jh != null)
{
int jwide = jh.wide;
jwide *= jh.clrs;
unsafe
{
if (jh.algo == 0xc3) //lossless JPEG
{
for (jrow = 0; jrow < jh.high; jrow++)
{
fixed(ushort *ptr = jh.row)
{
jh.rowPtr = ptr;
ushort *rp = ljpeg_row(jrow, jh, ms);
for (jcol = 0; jcol < jwide; jcol++)
{
if (jcol + col < mWidth && jrow + row < mHeight)
{
if (mLinearizationTable != null)
{
mRawImage[row + jrow, col + jcol] = mLinearizationTable.Value[rp[jcol] < mLinearizationTable.Value.Length ? rp[jcol] : mLinearizationTable.Value.Length - 1];
}
else
{
mRawImage[row + jrow, col + jcol] = rp[jcol];
}
}
}
jh.rowPtr = null;
}
}
}
}
}
col += tileWidth;
if (col > mWidth)
{
col = 0;
row += tileHeight;
}
}
}
