/// <summary>Create an ImageData instance from the passed parameters.</summary>
/// <param name="width">width of the image in pixels</param>
/// <param name="height">height of the image in pixels</param>
/// <param name="reverseBits">whether to reverse the bits stored in data (TIFF images).</param>
/// <param name="typeCCITT">Type of CCITT encoding</param>
/// <param name="parameters">colour space parameters</param>
/// <param name="data">array containing raw image data</param>
/// <param name="transparency">array containing transparency information</param>
/// <returns>created ImageData object.</returns>
public static ImageData Create(int width, int height, bool reverseBits, int typeCCITT, int parameters, byte
[] data, int[] transparency)
{
if (transparency != null && transparency.Length != 2)
{
throw new iText.IO.IOException(iText.IO.IOException.TransparencyLengthMustBeEqualTo2WithCcittImages);
}
if (typeCCITT != RawImageData.CCITTG4 && typeCCITT != RawImageData.CCITTG3_1D && typeCCITT != RawImageData
.CCITTG3_2D)
{
throw new iText.IO.IOException(iText.IO.IOException.CcittCompressionTypeMustBeCcittg4Ccittg3_1dOrCcittg3_2d
);
}
if (reverseBits)
{
TIFFFaxDecoder.ReverseBits(data);
}
RawImageData image = new RawImageData(data, ImageType.RAW);
image.SetTypeCcitt(typeCCITT);
image.height = height;
image.width = width;
image.colorSpace = parameters;
image.transparency = transparency;
return(image);
}
protected internal static void UpdateCcittImageParameters(RawImageData image, int width, int height, bool
reverseBits, int typeCcitt, int parameters, byte[] data)
{
if (typeCcitt != RawImageData.CCITTG4 && typeCcitt != RawImageData.CCITTG3_1D && typeCcitt != RawImageData
.CCITTG3_2D)
{
throw new iText.IO.IOException(iText.IO.IOException.CcittCompressionTypeMustBeCcittg4Ccittg3_1dOrCcittg3_2d
);
}
if (reverseBits)
{
TIFFFaxDecoder.ReverseBits(data);
}
image.SetHeight(height);
image.SetWidth(width);
image.SetColorSpace(parameters);
image.SetTypeCcitt(typeCcitt);
image.data = data;
}
/// <summary>
/// Creats an Image in CCITT mode.
/// </summary>
/// <param name="width">the exact width of the image</param>
/// <param name="height">the exact height of the image</param>
/// <param name="reverseBits">
/// reverses the bits in data.
/// Bit 0 is swapped with bit 7 and so on
/// </param>
/// <param name="typeCCITT">
/// the type of compression in data. It can be
/// CCITTG4, CCITTG31D, CCITTG32D
/// </param>
/// <param name="parameters">
/// parameters associated with this stream. Possible values are
/// CCITT_BLACKIS1, CCITT_ENCODEDBYTEALIGN, CCITT_ENDOFLINE and CCITT_ENDOFBLOCK or a
/// combination of them
/// </param>
/// <param name="data">the image data</param>
public ImgCCITT(int width, int height, bool reverseBits, int typeCCITT, int parameters, byte[] data) : base((Uri)null)
{
if (typeCCITT != Element.CCITTG4 && typeCCITT != Element.CCITTG3_1D && typeCCITT != Element.CCITTG3_2D)
{
throw new BadElementException(MessageLocalization.GetComposedMessage("the.ccitt.compression.type.must.be.ccittg4.ccittg3.1d.or.ccittg3.2d"));
}
if (reverseBits)
{
TIFFFaxDecoder.ReverseBits(data);
}
type = Element.IMGRAW;
scaledHeight = height;
this.Top = scaledHeight;
scaledWidth = width;
this.Right = scaledWidth;
colorspace = parameters;
bpc = typeCCITT;
rawData = data;
plainWidth = this.Width;
plainHeight = this.Height;
}
/// <summary>
/// Creats an Image in CCITT mode.
/// </summary>
/// <param name="width">the exact width of the image</param>
/// <param name="height">the exact height of the image</param>
/// <param name="reverseBits">
/// reverses the bits in data.
/// Bit 0 is swapped with bit 7 and so on
/// </param>
/// <param name="typeCCITT">
/// the type of compression in data. It can be
/// CCITTG4, CCITTG31D, CCITTG32D
/// </param>
/// <param name="parameters">
/// parameters associated with this stream. Possible values are
/// CCITT_BLACKIS1, CCITT_ENCODEDBYTEALIGN, CCITT_ENDOFLINE and CCITT_ENDOFBLOCK or a
/// combination of them
/// </param>
/// <param name="data">the image data</param>
public ImgCCITT(int width, int height, bool reverseBits, int typeCCITT, int parameters, byte[] data) : base((Uri)null)
{
if (typeCCITT != Element.CCITTG4 && typeCCITT != Element.CCITTG3_1D && typeCCITT != Element.CCITTG3_2D)
{
throw new BadElementException("The CCITT compression type must be CCITTG4, CCITTG3_1D or CCITTG3_2D");
}
if (reverseBits)
{
TIFFFaxDecoder.ReverseBits(data);
}
type = Element.IMGRAW;
scaledHeight = height;
this.Top = scaledHeight;
scaledWidth = width;
this.Right = scaledWidth;
colorspace = parameters;
bpc = typeCCITT;
rawData = data;
plainWidth = this.Width;
plainHeight = this.Height;
}
private static void ProcessTiffImage(RandomAccessFileOrArray s, TiffImageHelper.TiffParameters tiff)
{
bool recoverFromImageError = tiff.image.IsRecoverFromImageError();
int page = tiff.image.GetPage();
bool direct = tiff.image.IsDirect();
if (page < 1)
{
throw new iText.IO.IOException(iText.IO.IOException.PageNumberMustBeGtEq1);
}
try {
TIFFDirectory dir = new TIFFDirectory(s, page - 1);
if (dir.IsTagPresent(TIFFConstants.TIFFTAG_TILEWIDTH))
{
throw new iText.IO.IOException(iText.IO.IOException.TilesAreNotSupported);
}
int compression = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_COMPRESSION);
switch (compression)
{
case TIFFConstants.COMPRESSION_CCITTRLEW:
case TIFFConstants.COMPRESSION_CCITTRLE:
case TIFFConstants.COMPRESSION_CCITTFAX3:
case TIFFConstants.COMPRESSION_CCITTFAX4: {
break;
}
default: {
ProcessTiffImageColor(dir, s, tiff);
return;
}
}
float rotation = 0;
if (dir.IsTagPresent(TIFFConstants.TIFFTAG_ORIENTATION))
{
int rot = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_ORIENTATION);
if (rot == TIFFConstants.ORIENTATION_BOTRIGHT || rot == TIFFConstants.ORIENTATION_BOTLEFT)
{
rotation = (float)Math.PI;
}
else
{
if (rot == TIFFConstants.ORIENTATION_LEFTTOP || rot == TIFFConstants.ORIENTATION_LEFTBOT)
{
rotation = (float)(Math.PI / 2.0);
}
else
{
if (rot == TIFFConstants.ORIENTATION_RIGHTTOP || rot == TIFFConstants.ORIENTATION_RIGHTBOT)
{
rotation = -(float)(Math.PI / 2.0);
}
}
}
}
long tiffT4Options = 0;
long tiffT6Options = 0;
int fillOrder = 1;
int h = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_IMAGELENGTH);
int w = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_IMAGEWIDTH);
float XYRatio = 0;
int resolutionUnit = TIFFConstants.RESUNIT_INCH;
if (dir.IsTagPresent(TIFFConstants.TIFFTAG_RESOLUTIONUNIT))
{
resolutionUnit = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_RESOLUTIONUNIT);
}
int dpiX = GetDpi(dir.GetField(TIFFConstants.TIFFTAG_XRESOLUTION), resolutionUnit);
int dpiY = GetDpi(dir.GetField(TIFFConstants.TIFFTAG_YRESOLUTION), resolutionUnit);
if (resolutionUnit == TIFFConstants.RESUNIT_NONE)
{
if (dpiY != 0)
{
XYRatio = (float)dpiX / (float)dpiY;
}
dpiX = 0;
dpiY = 0;
}
int rowsStrip = h;
if (dir.IsTagPresent(TIFFConstants.TIFFTAG_ROWSPERSTRIP))
{
rowsStrip = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_ROWSPERSTRIP);
}
if (rowsStrip <= 0 || rowsStrip > h)
{
rowsStrip = h;
}
long[] offset = GetArrayLongShort(dir, TIFFConstants.TIFFTAG_STRIPOFFSETS);
long[] size = GetArrayLongShort(dir, TIFFConstants.TIFFTAG_STRIPBYTECOUNTS);
if ((size == null || (size.Length == 1 && (size[0] == 0 || size[0] + offset[0] > s.Length()))) && h == rowsStrip
)
{
// some TIFF producers are really lousy, so...
size = new long[] { s.Length() - (int)offset[0] };
}
bool reverse = false;
TIFFField fillOrderField = dir.GetField(TIFFConstants.TIFFTAG_FILLORDER);
if (fillOrderField != null)
{
fillOrder = fillOrderField.GetAsInt(0);
}
reverse = (fillOrder == TIFFConstants.FILLORDER_LSB2MSB);
int parameters = 0;
if (dir.IsTagPresent(TIFFConstants.TIFFTAG_PHOTOMETRIC))
{
long photo = dir.GetFieldAsLong(TIFFConstants.TIFFTAG_PHOTOMETRIC);
if (photo == TIFFConstants.PHOTOMETRIC_MINISBLACK)
{
parameters |= RawImageData.CCITT_BLACKIS1;
}
}
int imagecomp = 0;
switch (compression)
{
case TIFFConstants.COMPRESSION_CCITTRLEW:
case TIFFConstants.COMPRESSION_CCITTRLE: {
imagecomp = RawImageData.CCITTG3_1D;
parameters |= RawImageData.CCITT_ENCODEDBYTEALIGN | RawImageData.CCITT_ENDOFBLOCK;
break;
}
case TIFFConstants.COMPRESSION_CCITTFAX3: {
imagecomp = RawImageData.CCITTG3_1D;
parameters |= RawImageData.CCITT_ENDOFLINE | RawImageData.CCITT_ENDOFBLOCK;
TIFFField t4OptionsField = dir.GetField(TIFFConstants.TIFFTAG_GROUP3OPTIONS);
if (t4OptionsField != null)
{
tiffT4Options = t4OptionsField.GetAsLong(0);
if ((tiffT4Options & TIFFConstants.GROUP3OPT_2DENCODING) != 0)
{
imagecomp = RawImageData.CCITTG3_2D;
}
if ((tiffT4Options & TIFFConstants.GROUP3OPT_FILLBITS) != 0)
{
parameters |= RawImageData.CCITT_ENCODEDBYTEALIGN;
}
}
break;
}
case TIFFConstants.COMPRESSION_CCITTFAX4: {
imagecomp = RawImageData.CCITTG4;
TIFFField t6OptionsField = dir.GetField(TIFFConstants.TIFFTAG_GROUP4OPTIONS);
if (t6OptionsField != null)
{
tiffT6Options = t6OptionsField.GetAsLong(0);
}
break;
}
}
if (direct && rowsStrip == h)
{
//single strip, direct
byte[] im = new byte[(int)size[0]];
s.Seek(offset[0]);
s.ReadFully(im);
RawImageHelper.UpdateRawImageParameters(tiff.image, w, h, false, imagecomp, parameters, im, null);
tiff.image.SetInverted(true);
}
else
{
int rowsLeft = h;
CCITTG4Encoder g4 = new CCITTG4Encoder(w);
for (int k = 0; k < offset.Length; ++k)
{
byte[] im = new byte[(int)size[k]];
s.Seek(offset[k]);
s.ReadFully(im);
int height = Math.Min(rowsStrip, rowsLeft);
TIFFFaxDecoder decoder = new TIFFFaxDecoder(fillOrder, w, height);
decoder.SetRecoverFromImageError(recoverFromImageError);
byte[] outBuf = new byte[(w + 7) / 8 * height];
switch (compression)
{
case TIFFConstants.COMPRESSION_CCITTRLEW:
case TIFFConstants.COMPRESSION_CCITTRLE: {
decoder.Decode1D(outBuf, im, 0, height);
g4.Fax4Encode(outBuf, height);
break;
}
case TIFFConstants.COMPRESSION_CCITTFAX3: {
try {
decoder.Decode2D(outBuf, im, 0, height, tiffT4Options);
}
catch (Exception e) {
// let's flip the fill bits and try again...
tiffT4Options ^= TIFFConstants.GROUP3OPT_FILLBITS;
try {
decoder.Decode2D(outBuf, im, 0, height, tiffT4Options);
}
catch (Exception) {
if (!recoverFromImageError)
{
throw e;
}
if (rowsStrip == 1)
{
throw e;
}
// repeat of reading the tiff directly (the if section of this if else structure)
// copy pasted to avoid making a method with 10 tiff
im = new byte[(int)size[0]];
s.Seek(offset[0]);
s.ReadFully(im);
RawImageHelper.UpdateRawImageParameters(tiff.image, w, h, false, imagecomp, parameters, im, null);
tiff.image.SetInverted(true);
tiff.image.SetDpi(dpiX, dpiY);
tiff.image.SetXYRatio(XYRatio);
if (rotation != 0)
{
tiff.image.SetRotation(rotation);
}
return;
}
}
g4.Fax4Encode(outBuf, height);
break;
}
case TIFFConstants.COMPRESSION_CCITTFAX4: {
try {
decoder.DecodeT6(outBuf, im, 0, height, tiffT6Options);
}
catch (iText.IO.IOException e) {
if (!recoverFromImageError)
{
throw;
}
}
g4.Fax4Encode(outBuf, height);
break;
}
}
rowsLeft -= rowsStrip;
}
byte[] g4pic = g4.Close();
RawImageHelper.UpdateRawImageParameters(tiff.image, w, h, false, RawImageData.CCITTG4, parameters & RawImageData
.CCITT_BLACKIS1, g4pic, null);
}
tiff.image.SetDpi(dpiX, dpiY);
if (dir.IsTagPresent(TIFFConstants.TIFFTAG_ICCPROFILE))
{
try {
TIFFField fd = dir.GetField(TIFFConstants.TIFFTAG_ICCPROFILE);
IccProfile icc_prof = IccProfile.GetInstance(fd.GetAsBytes());
if (icc_prof.GetNumComponents() == 1)
{
tiff.image.SetProfile(icc_prof);
}
}
catch (Exception) {
}
}
//empty
if (rotation != 0)
{
tiff.image.SetRotation(rotation);
}
}
catch (Exception) {
throw new iText.IO.IOException(iText.IO.IOException.CannotReadTiffImage);
}
}
private static void ProcessTiffImageColor(TIFFDirectory dir, RandomAccessFileOrArray s, TiffImageHelper.TiffParameters
tiff)
{
try {
int compression = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_COMPRESSION);
int predictor = 1;
TIFFLZWDecoder lzwDecoder = null;
switch (compression)
{
case TIFFConstants.COMPRESSION_NONE:
case TIFFConstants.COMPRESSION_LZW:
case TIFFConstants.COMPRESSION_PACKBITS:
case TIFFConstants.COMPRESSION_DEFLATE:
case TIFFConstants.COMPRESSION_ADOBE_DEFLATE:
case TIFFConstants.COMPRESSION_OJPEG:
case TIFFConstants.COMPRESSION_JPEG: {
break;
}
default: {
throw new iText.IO.IOException(iText.IO.IOException.Compression1IsNotSupported).SetMessageParams(compression
);
}
}
int photometric = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_PHOTOMETRIC);
switch (photometric)
{
case TIFFConstants.PHOTOMETRIC_MINISWHITE:
case TIFFConstants.PHOTOMETRIC_MINISBLACK:
case TIFFConstants.PHOTOMETRIC_RGB:
case TIFFConstants.PHOTOMETRIC_SEPARATED:
case TIFFConstants.PHOTOMETRIC_PALETTE: {
break;
}
default: {
if (compression != TIFFConstants.COMPRESSION_OJPEG && compression != TIFFConstants.COMPRESSION_JPEG)
{
throw new iText.IO.IOException(iText.IO.IOException.Photometric1IsNotSupported).SetMessageParams(photometric
);
}
break;
}
}
float rotation = 0;
if (dir.IsTagPresent(TIFFConstants.TIFFTAG_ORIENTATION))
{
int rot = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_ORIENTATION);
if (rot == TIFFConstants.ORIENTATION_BOTRIGHT || rot == TIFFConstants.ORIENTATION_BOTLEFT)
{
rotation = (float)Math.PI;
}
else
{
if (rot == TIFFConstants.ORIENTATION_LEFTTOP || rot == TIFFConstants.ORIENTATION_LEFTBOT)
{
rotation = (float)(Math.PI / 2.0);
}
else
{
if (rot == TIFFConstants.ORIENTATION_RIGHTTOP || rot == TIFFConstants.ORIENTATION_RIGHTBOT)
{
rotation = -(float)(Math.PI / 2.0);
}
}
}
}
if (dir.IsTagPresent(TIFFConstants.TIFFTAG_PLANARCONFIG) && dir.GetFieldAsLong(TIFFConstants.TIFFTAG_PLANARCONFIG
) == TIFFConstants.PLANARCONFIG_SEPARATE)
{
throw new iText.IO.IOException(iText.IO.IOException.PlanarImagesAreNotSupported);
}
int extraSamples = 0;
if (dir.IsTagPresent(TIFFConstants.TIFFTAG_EXTRASAMPLES))
{
extraSamples = 1;
}
int samplePerPixel = 1;
if (dir.IsTagPresent(TIFFConstants.TIFFTAG_SAMPLESPERPIXEL))
{
// 1,3,4
samplePerPixel = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_SAMPLESPERPIXEL);
}
int bitsPerSample = 1;
if (dir.IsTagPresent(TIFFConstants.TIFFTAG_BITSPERSAMPLE))
{
bitsPerSample = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_BITSPERSAMPLE);
}
switch (bitsPerSample)
{
case 1:
case 2:
case 4:
case 8: {
break;
}
default: {
throw new iText.IO.IOException(iText.IO.IOException.BitsPerSample1IsNotSupported).SetMessageParams(bitsPerSample
);
}
}
int h = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_IMAGELENGTH);
int w = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_IMAGEWIDTH);
int dpiX;
int dpiY;
int resolutionUnit = TIFFConstants.RESUNIT_INCH;
if (dir.IsTagPresent(TIFFConstants.TIFFTAG_RESOLUTIONUNIT))
{
resolutionUnit = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_RESOLUTIONUNIT);
}
dpiX = GetDpi(dir.GetField(TIFFConstants.TIFFTAG_XRESOLUTION), resolutionUnit);
dpiY = GetDpi(dir.GetField(TIFFConstants.TIFFTAG_YRESOLUTION), resolutionUnit);
int fillOrder = 1;
TIFFField fillOrderField = dir.GetField(TIFFConstants.TIFFTAG_FILLORDER);
if (fillOrderField != null)
{
fillOrder = fillOrderField.GetAsInt(0);
}
bool reverse = (fillOrder == TIFFConstants.FILLORDER_LSB2MSB);
int rowsStrip = h;
if (dir.IsTagPresent(TIFFConstants.TIFFTAG_ROWSPERSTRIP))
{
//another hack for broken tiffs
rowsStrip = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_ROWSPERSTRIP);
}
if (rowsStrip <= 0 || rowsStrip > h)
{
rowsStrip = h;
}
long[] offset = GetArrayLongShort(dir, TIFFConstants.TIFFTAG_STRIPOFFSETS);
long[] size = GetArrayLongShort(dir, TIFFConstants.TIFFTAG_STRIPBYTECOUNTS);
if ((size == null || (size.Length == 1 && (size[0] == 0 || size[0] + offset[0] > s.Length()))) && h == rowsStrip
)
{
// some TIFF producers are really lousy, so...
size = new long[] { s.Length() - (int)offset[0] };
}
if (compression == TIFFConstants.COMPRESSION_LZW || compression == TIFFConstants.COMPRESSION_DEFLATE || compression
== TIFFConstants.COMPRESSION_ADOBE_DEFLATE)
{
TIFFField predictorField = dir.GetField(TIFFConstants.TIFFTAG_PREDICTOR);
if (predictorField != null)
{
predictor = predictorField.GetAsInt(0);
if (predictor != 1 && predictor != 2)
{
throw new iText.IO.IOException(iText.IO.IOException.IllegalValueForPredictorInTiffFile);
}
if (predictor == 2 && bitsPerSample != 8)
{
throw new iText.IO.IOException(iText.IO.IOException._1BitSamplesAreNotSupportedForHorizontalDifferencingPredictor
).SetMessageParams(bitsPerSample);
}
}
}
if (compression == TIFFConstants.COMPRESSION_LZW)
{
lzwDecoder = new TIFFLZWDecoder(w, predictor, samplePerPixel);
}
int rowsLeft = h;
ByteArrayOutputStream stream = null;
ByteArrayOutputStream mstream = null;
DeflaterOutputStream zip = null;
DeflaterOutputStream mzip = null;
if (extraSamples > 0)
{
mstream = new ByteArrayOutputStream();
mzip = new DeflaterOutputStream(mstream);
}
CCITTG4Encoder g4 = null;
if (bitsPerSample == 1 && samplePerPixel == 1 && photometric != TIFFConstants.PHOTOMETRIC_PALETTE)
{
g4 = new CCITTG4Encoder(w);
}
else
{
stream = new ByteArrayOutputStream();
if (compression != TIFFConstants.COMPRESSION_OJPEG && compression != TIFFConstants.COMPRESSION_JPEG)
{
zip = new DeflaterOutputStream(stream);
}
}
if (compression == TIFFConstants.COMPRESSION_OJPEG)
{
// Assume that the TIFFTAG_JPEGIFBYTECOUNT tag is optional, since it's obsolete and
// is often missing
if ((!dir.IsTagPresent(TIFFConstants.TIFFTAG_JPEGIFOFFSET)))
{
throw new iText.IO.IOException(iText.IO.IOException.MissingTagsForOjpegCompression);
}
int jpegOffset = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_JPEGIFOFFSET);
int jpegLength = (int)s.Length() - jpegOffset;
if (dir.IsTagPresent(TIFFConstants.TIFFTAG_JPEGIFBYTECOUNT))
{
jpegLength = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_JPEGIFBYTECOUNT) + (int)size[0];
}
byte[] jpeg = new byte[Math.Min(jpegLength, (int)s.Length() - jpegOffset)];
int posFilePointer = (int)s.GetPosition();
posFilePointer += jpegOffset;
s.Seek(posFilePointer);
s.ReadFully(jpeg);
tiff.image.data = jpeg;
tiff.image.SetOriginalType(ImageType.JPEG);
JpegImageHelper.ProcessImage(tiff.image);
tiff.jpegProcessing = true;
}
else
{
if (compression == TIFFConstants.COMPRESSION_JPEG)
{
if (size.Length > 1)
{
throw new iText.IO.IOException(iText.IO.IOException.CompressionJpegIsOnlySupportedWithASingleStripThisImageHas1Strips
).SetMessageParams(size.Length);
}
byte[] jpeg = new byte[(int)size[0]];
s.Seek(offset[0]);
s.ReadFully(jpeg);
// if quantization and/or Huffman tables are stored separately in the tiff,
// we need to add them to the jpeg data
TIFFField jpegtables = dir.GetField(TIFFConstants.TIFFTAG_JPEGTABLES);
if (jpegtables != null)
{
byte[] temp = jpegtables.GetAsBytes();
int tableoffset = 0;
int tablelength = temp.Length;
// remove FFD8 from start
if (temp[0] == (byte)0xFF && temp[1] == (byte)0xD8)
{
tableoffset = 2;
tablelength -= 2;
}
// remove FFD9 from end
if (temp[temp.Length - 2] == (byte)0xFF && temp[temp.Length - 1] == (byte)0xD9)
{
tablelength -= 2;
}
byte[] tables = new byte[tablelength];
System.Array.Copy(temp, tableoffset, tables, 0, tablelength);
// TODO insert after JFIF header, instead of at the start
byte[] jpegwithtables = new byte[jpeg.Length + tables.Length];
System.Array.Copy(jpeg, 0, jpegwithtables, 0, 2);
System.Array.Copy(tables, 0, jpegwithtables, 2, tables.Length);
System.Array.Copy(jpeg, 2, jpegwithtables, tables.Length + 2, jpeg.Length - 2);
jpeg = jpegwithtables;
}
tiff.image.data = jpeg;
tiff.image.SetOriginalType(ImageType.JPEG);
JpegImageHelper.ProcessImage(tiff.image);
tiff.jpegProcessing = true;
if (photometric == TIFFConstants.PHOTOMETRIC_RGB)
{
tiff.image.SetColorTransform(0);
}
}
else
{
for (int k = 0; k < offset.Length; ++k)
{
byte[] im = new byte[(int)size[k]];
s.Seek(offset[k]);
s.ReadFully(im);
int height = Math.Min(rowsStrip, rowsLeft);
byte[] outBuf = null;
if (compression != TIFFConstants.COMPRESSION_NONE)
{
outBuf = new byte[(w * bitsPerSample * samplePerPixel + 7) / 8 * height];
}
if (reverse)
{
TIFFFaxDecoder.ReverseBits(im);
}
switch (compression)
{
case TIFFConstants.COMPRESSION_DEFLATE:
case TIFFConstants.COMPRESSION_ADOBE_DEFLATE: {
FilterUtil.InflateData(im, outBuf);
ApplyPredictor(outBuf, predictor, w, height, samplePerPixel);
break;
}
case TIFFConstants.COMPRESSION_NONE: {
outBuf = im;
break;
}
case TIFFConstants.COMPRESSION_PACKBITS: {
DecodePackbits(im, outBuf);
break;
}
case TIFFConstants.COMPRESSION_LZW: {
lzwDecoder.Decode(im, outBuf, height);
break;
}
}
if (bitsPerSample == 1 && samplePerPixel == 1 && photometric != TIFFConstants.PHOTOMETRIC_PALETTE)
{
g4.Fax4Encode(outBuf, height);
}
else
{
if (extraSamples > 0)
{
ProcessExtraSamples(zip, mzip, outBuf, samplePerPixel, bitsPerSample, w, height);
}
else
{
zip.Write(outBuf);
}
}
rowsLeft -= rowsStrip;
}
if (bitsPerSample == 1 && samplePerPixel == 1 && photometric != TIFFConstants.PHOTOMETRIC_PALETTE)
{
RawImageHelper.UpdateRawImageParameters(tiff.image, w, h, false, RawImageData.CCITTG4, photometric == TIFFConstants
.PHOTOMETRIC_MINISBLACK ? RawImageData.CCITT_BLACKIS1 : 0, g4.Close(), null);
}
else
{
zip.Close();
RawImageHelper.UpdateRawImageParameters(tiff.image, w, h, samplePerPixel - extraSamples, bitsPerSample, stream
.ToArray());
tiff.image.SetDeflated(true);
}
}
}
tiff.image.SetDpi(dpiX, dpiY);
if (compression != TIFFConstants.COMPRESSION_OJPEG && compression != TIFFConstants.COMPRESSION_JPEG)
{
if (dir.IsTagPresent(TIFFConstants.TIFFTAG_ICCPROFILE))
{
try {
TIFFField fd = dir.GetField(TIFFConstants.TIFFTAG_ICCPROFILE);
IccProfile icc_prof = IccProfile.GetInstance(fd.GetAsBytes());
if (samplePerPixel - extraSamples == icc_prof.GetNumComponents())
{
tiff.image.SetProfile(icc_prof);
}
}
catch (Exception) {
}
}
//empty
if (dir.IsTagPresent(TIFFConstants.TIFFTAG_COLORMAP))
{
TIFFField fd = dir.GetField(TIFFConstants.TIFFTAG_COLORMAP);
char[] rgb = fd.GetAsChars();
byte[] palette = new byte[rgb.Length];
int gColor = rgb.Length / 3;
int bColor = gColor * 2;
for (int k = 0; k < gColor; ++k)
{
//there is no sense in >>> for unsigned char
palette[k * 3] = (byte)(rgb[k] >> 8);
palette[k * 3 + 1] = (byte)(rgb[k + gColor] >> 8);
palette[k * 3 + 2] = (byte)(rgb[k + bColor] >> 8);
}
// Colormap components are supposed to go from 0 to 655535 but,
// as usually, some tiff producers just put values from 0 to 255.
// Let's check for these broken tiffs.
bool colormapBroken = true;
for (int k_1 = 0; k_1 < palette.Length; ++k_1)
{
if (palette[k_1] != 0)
{
colormapBroken = false;
break;
}
}
if (colormapBroken)
{
for (int k_2 = 0; k_2 < gColor; ++k_2)
{
palette[k_2 * 3] = (byte)rgb[k_2];
palette[k_2 * 3 + 1] = (byte)rgb[k_2 + gColor];
palette[k_2 * 3 + 2] = (byte)rgb[k_2 + bColor];
}
}
Object[] indexed = new Object[4];
indexed[0] = "Indexed";
indexed[1] = "DeviceRGB";
indexed[2] = gColor - 1;
indexed[3] = PdfEncodings.ConvertToString(palette, null);
tiff.additional = new Dictionary <String, Object>();
tiff.additional["ColorSpace"] = indexed;
}
}
if (photometric == TIFFConstants.PHOTOMETRIC_MINISWHITE)
{
tiff.image.SetInverted(true);
}
if (rotation != 0)
{
tiff.image.SetRotation(rotation);
}
if (extraSamples > 0)
{
mzip.Close();
RawImageData mimg = (RawImageData)ImageDataFactory.CreateRawImage(null);
RawImageHelper.UpdateRawImageParameters(mimg, w, h, 1, bitsPerSample, mstream.ToArray());
mimg.MakeMask();
mimg.SetDeflated(true);
tiff.image.SetImageMask(mimg);
}
}
catch (Exception) {
throw new iText.IO.IOException(iText.IO.IOException.CannotGetTiffImageColor);
}
}
protected static Image GetTiffImageColor(TIFFDirectory dir, RandomAccessFileOrArray s)
{
int predictor = 1;
TIFFLZWDecoder lzwDecoder = null;
int compression = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_COMPRESSION);
switch (compression)
{
case TIFFConstants.COMPRESSION_NONE:
case TIFFConstants.COMPRESSION_LZW:
case TIFFConstants.COMPRESSION_PACKBITS:
case TIFFConstants.COMPRESSION_DEFLATE:
case TIFFConstants.COMPRESSION_ADOBE_DEFLATE:
case TIFFConstants.COMPRESSION_OJPEG:
case TIFFConstants.COMPRESSION_JPEG:
break;
default:
throw new ArgumentException(MessageLocalization.GetComposedMessage("the.compression.1.is.not.supported", compression));
}
int photometric = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_PHOTOMETRIC);
switch (photometric)
{
case TIFFConstants.PHOTOMETRIC_MINISWHITE:
case TIFFConstants.PHOTOMETRIC_MINISBLACK:
case TIFFConstants.PHOTOMETRIC_RGB:
case TIFFConstants.PHOTOMETRIC_SEPARATED:
case TIFFConstants.PHOTOMETRIC_PALETTE:
break;
default:
if (compression != TIFFConstants.COMPRESSION_OJPEG && compression != TIFFConstants.COMPRESSION_JPEG)
{
throw new ArgumentException(MessageLocalization.GetComposedMessage("the.photometric.1.is.not.supported", photometric));
}
break;
}
float rotation = 0;
if (dir.IsTagPresent(TIFFConstants.TIFFTAG_ORIENTATION))
{
int rot = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_ORIENTATION);
if (rot == TIFFConstants.ORIENTATION_BOTRIGHT || rot == TIFFConstants.ORIENTATION_BOTLEFT)
{
rotation = (float)Math.PI;
}
else if (rot == TIFFConstants.ORIENTATION_LEFTTOP || rot == TIFFConstants.ORIENTATION_LEFTBOT)
{
rotation = (float)(Math.PI / 2.0);
}
else if (rot == TIFFConstants.ORIENTATION_RIGHTTOP || rot == TIFFConstants.ORIENTATION_RIGHTBOT)
{
rotation = -(float)(Math.PI / 2.0);
}
}
if (dir.IsTagPresent(TIFFConstants.TIFFTAG_PLANARCONFIG) &&
dir.GetFieldAsLong(TIFFConstants.TIFFTAG_PLANARCONFIG) == TIFFConstants.PLANARCONFIG_SEPARATE)
{
throw new ArgumentException(MessageLocalization.GetComposedMessage("planar.images.are.not.supported"));
}
int extraSamples = 0;
if (dir.IsTagPresent(TIFFConstants.TIFFTAG_EXTRASAMPLES))
{
extraSamples = 1;
}
int samplePerPixel = 1;
if (dir.IsTagPresent(TIFFConstants.TIFFTAG_SAMPLESPERPIXEL)) // 1,3,4
{
samplePerPixel = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_SAMPLESPERPIXEL);
}
int bitsPerSample = 1;
if (dir.IsTagPresent(TIFFConstants.TIFFTAG_BITSPERSAMPLE))
{
bitsPerSample = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_BITSPERSAMPLE);
}
switch (bitsPerSample)
{
case 1:
case 2:
case 4:
case 8:
break;
default:
throw new ArgumentException(MessageLocalization.GetComposedMessage("bits.per.sample.1.is.not.supported", bitsPerSample));
}
Image img = null;
int h = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_IMAGELENGTH);
int w = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_IMAGEWIDTH);
int dpiX = 0;
int dpiY = 0;
int resolutionUnit = TIFFConstants.RESUNIT_INCH;
if (dir.IsTagPresent(TIFFConstants.TIFFTAG_RESOLUTIONUNIT))
{
resolutionUnit = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_RESOLUTIONUNIT);
}
dpiX = GetDpi(dir.GetField(TIFFConstants.TIFFTAG_XRESOLUTION), resolutionUnit);
dpiY = GetDpi(dir.GetField(TIFFConstants.TIFFTAG_YRESOLUTION), resolutionUnit);
int fillOrder = 1;
bool reverse = false;
TIFFField fillOrderField = dir.GetField(TIFFConstants.TIFFTAG_FILLORDER);
if (fillOrderField != null)
{
fillOrder = fillOrderField.GetAsInt(0);
}
reverse = (fillOrder == TIFFConstants.FILLORDER_LSB2MSB);
int rowsStrip = h;
if (dir.IsTagPresent(TIFFConstants.TIFFTAG_ROWSPERSTRIP)) //another hack for broken tiffs
{
rowsStrip = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_ROWSPERSTRIP);
}
if (rowsStrip <= 0 || rowsStrip > h)
{
rowsStrip = h;
}
long[] offset = GetArrayLongShort(dir, TIFFConstants.TIFFTAG_STRIPOFFSETS);
long[] size = GetArrayLongShort(dir, TIFFConstants.TIFFTAG_STRIPBYTECOUNTS);
if ((size == null || (size.Length == 1 && (size[0] == 0 || size[0] + offset[0] > s.Length))) && h == rowsStrip) // some TIFF producers are really lousy, so...
{
size = new long[] { s.Length - (int)offset[0] };
}
if (compression == TIFFConstants.COMPRESSION_LZW || compression == TIFFConstants.COMPRESSION_DEFLATE || compression == TIFFConstants.COMPRESSION_ADOBE_DEFLATE)
{
TIFFField predictorField = dir.GetField(TIFFConstants.TIFFTAG_PREDICTOR);
if (predictorField != null)
{
predictor = predictorField.GetAsInt(0);
if (predictor != 1 && predictor != 2)
{
throw new Exception(MessageLocalization.GetComposedMessage("illegal.value.for.predictor.in.tiff.file"));
}
if (predictor == 2 && bitsPerSample != 8)
{
throw new Exception(MessageLocalization.GetComposedMessage("1.bit.samples.are.not.supported.for.horizontal.differencing.predictor", bitsPerSample));
}
}
}
if (compression == TIFFConstants.COMPRESSION_LZW)
{
lzwDecoder = new TIFFLZWDecoder(w, predictor, samplePerPixel);
}
int rowsLeft = h;
MemoryStream stream = null;
MemoryStream mstream = null;
ZDeflaterOutputStream zip = null;
ZDeflaterOutputStream mzip = null;
if (extraSamples > 0)
{
mstream = new MemoryStream();
mzip = new ZDeflaterOutputStream(mstream);
}
CCITTG4Encoder g4 = null;
if (bitsPerSample == 1 && samplePerPixel == 1 && photometric != TIFFConstants.PHOTOMETRIC_PALETTE)
{
g4 = new CCITTG4Encoder(w);
}
else
{
stream = new MemoryStream();
if (compression != TIFFConstants.COMPRESSION_OJPEG && compression != TIFFConstants.COMPRESSION_JPEG)
{
zip = new ZDeflaterOutputStream(stream);
}
}
if (compression == TIFFConstants.COMPRESSION_OJPEG)
{
// Assume that the TIFFTAG_JPEGIFBYTECOUNT tag is optional, since it's obsolete and
// is often missing
if ((!dir.IsTagPresent(TIFFConstants.TIFFTAG_JPEGIFOFFSET)))
{
throw new IOException(MessageLocalization.GetComposedMessage("missing.tag.s.for.ojpeg.compression"));
}
int jpegOffset = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_JPEGIFOFFSET);
int jpegLength = (int)s.Length - jpegOffset;
if (dir.IsTagPresent(TIFFConstants.TIFFTAG_JPEGIFBYTECOUNT))
{
jpegLength = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_JPEGIFBYTECOUNT) +
(int)size[0];
}
byte[] jpeg = new byte[Math.Min(jpegLength, s.Length - jpegOffset)];
int posFilePointer = (int)s.FilePointer;
posFilePointer += jpegOffset;
s.Seek(posFilePointer);
s.ReadFully(jpeg);
// if quantization and/or Huffman tables are stored separately in the tiff,
// we need to add them to the jpeg data
TIFFField jpegtables = dir.GetField(TIFFConstants.TIFFTAG_JPEGTABLES);
if (jpegtables != null)
{
byte[] temp = jpegtables.GetAsBytes();
int tableoffset = 0;
int tablelength = temp.Length;
// remove FFD8 from start
if (temp[0] == (byte)0xFF && temp[1] == (byte)0xD8)
{
tableoffset = 2;
tablelength -= 2;
}
// remove FFD9 from end
if (temp[temp.Length - 2] == (byte)0xFF && temp[temp.Length - 1] == (byte)0xD9)
{
tablelength -= 2;
}
byte[] tables = new byte[tablelength];
Array.Copy(temp, tableoffset, tables, 0, tablelength);
// TODO insert after JFIF header, instead of at the start
byte[] jpegwithtables = new byte[jpeg.Length + tables.Length];
Array.Copy(jpeg, 0, jpegwithtables, 0, 2);
Array.Copy(tables, 0, jpegwithtables, 2, tables.Length);
Array.Copy(jpeg, 2, jpegwithtables, tables.Length + 2, jpeg.Length - 2);
jpeg = jpegwithtables;
}
img = new Jpeg(jpeg);
}
else if (compression == TIFFConstants.COMPRESSION_JPEG)
{
if (size.Length > 1)
{
throw new IOException(MessageLocalization.GetComposedMessage("compression.jpeg.is.only.supported.with.a.single.strip.this.image.has.1.strips", size.Length));
}
byte[] jpeg = new byte[(int)size[0]];
s.Seek(offset[0]);
s.ReadFully(jpeg);
img = new Jpeg(jpeg);
}
else
{
for (int k = 0; k < offset.Length; ++k)
{
byte[] im = new byte[(int)size[k]];
s.Seek(offset[k]);
s.ReadFully(im);
int height = Math.Min(rowsStrip, rowsLeft);
byte[] outBuf = null;
if (compression != TIFFConstants.COMPRESSION_NONE)
{
outBuf = new byte[(w * bitsPerSample * samplePerPixel + 7) / 8 * height];
}
if (reverse)
{
TIFFFaxDecoder.ReverseBits(im);
}
switch (compression)
{
case TIFFConstants.COMPRESSION_DEFLATE:
case TIFFConstants.COMPRESSION_ADOBE_DEFLATE:
Inflate(im, outBuf);
ApplyPredictor(outBuf, predictor, w, height, samplePerPixel);
break;
case TIFFConstants.COMPRESSION_NONE:
outBuf = im;
break;
case TIFFConstants.COMPRESSION_PACKBITS:
DecodePackbits(im, outBuf);
break;
case TIFFConstants.COMPRESSION_LZW:
lzwDecoder.Decode(im, outBuf, height);
break;
}
if (bitsPerSample == 1 && samplePerPixel == 1 && photometric != TIFFConstants.PHOTOMETRIC_PALETTE)
{
g4.Fax4Encode(outBuf, height);
}
else
{
if (extraSamples > 0)
{
ProcessExtraSamples(zip, mzip, outBuf, samplePerPixel, bitsPerSample, w, height);
}
else
{
zip.Write(outBuf, 0, outBuf.Length);
}
}
rowsLeft -= rowsStrip;
}
if (bitsPerSample == 1 && samplePerPixel == 1 && photometric != TIFFConstants.PHOTOMETRIC_PALETTE)
{
img = Image.GetInstance(w, h, false, Image.CCITTG4,
photometric == TIFFConstants.PHOTOMETRIC_MINISBLACK ? Image.CCITT_BLACKIS1 : 0, g4.Close());
}
else
{
zip.Close();
img = new ImgRaw(w, h, samplePerPixel - extraSamples, bitsPerSample, stream.ToArray());
img.Deflated = true;
}
}
img.SetDpi(dpiX, dpiY);
if (compression != TIFFConstants.COMPRESSION_OJPEG && compression != TIFFConstants.COMPRESSION_JPEG)
{
if (dir.IsTagPresent(TIFFConstants.TIFFTAG_ICCPROFILE))
{
try {
TIFFField fd = dir.GetField(TIFFConstants.TIFFTAG_ICCPROFILE);
ICC_Profile icc_prof = ICC_Profile.GetInstance(fd.GetAsBytes());
if (samplePerPixel - extraSamples == icc_prof.NumComponents)
{
img.TagICC = icc_prof;
}
}
catch {
//empty
}
}
if (dir.IsTagPresent(TIFFConstants.TIFFTAG_COLORMAP))
{
TIFFField fd = dir.GetField(TIFFConstants.TIFFTAG_COLORMAP);
char[] rgb = fd.GetAsChars();
byte[] palette = new byte[rgb.Length];
int gColor = rgb.Length / 3;
int bColor = gColor * 2;
for (int k = 0; k < gColor; ++k)
{
palette[k * 3] = (byte)(rgb[k] >> 8);
palette[k * 3 + 1] = (byte)(rgb[k + gColor] >> 8);
palette[k * 3 + 2] = (byte)(rgb[k + bColor] >> 8);
}
// Colormap components are supposed to go from 0 to 655535 but,
// as usually, some tiff producers just put values from 0 to 255.
// Let's check for these broken tiffs.
bool colormapBroken = true;
for (int k = 0; k < palette.Length; ++k)
{
if (palette[k] != 0)
{
colormapBroken = false;
break;
}
}
if (colormapBroken)
{
for (int k = 0; k < gColor; ++k)
{
palette[k * 3] = (byte)rgb[k];
palette[k * 3 + 1] = (byte)rgb[k + gColor];
palette[k * 3 + 2] = (byte)rgb[k + bColor];
}
}
PdfArray indexed = new PdfArray();
indexed.Add(PdfName.INDEXED);
indexed.Add(PdfName.DEVICERGB);
indexed.Add(new PdfNumber(gColor - 1));
indexed.Add(new PdfString(palette));
PdfDictionary additional = new PdfDictionary();
additional.Put(PdfName.COLORSPACE, indexed);
img.Additional = additional;
}
img.OriginalType = Image.ORIGINAL_TIFF;
}
if (photometric == TIFFConstants.PHOTOMETRIC_MINISWHITE)
{
img.Inverted = true;
}
if (rotation != 0)
{
img.InitialRotation = rotation;
}
if (extraSamples > 0)
{
mzip.Close();
Image mimg = Image.GetInstance(w, h, 1, bitsPerSample, mstream.ToArray());
mimg.MakeMask();
mimg.Deflated = true;
img.ImageMask = mimg;
}
return(img);
}
/** Reads a page from a TIFF image.
* @param s the file source
* @param page the page to get. The first page is 1
* @param direct for single strip, CCITT images, generate the image
* by direct byte copying. It's faster but may not work
* every time
* @return the <CODE>Image</CODE>
*/
public static Image GetTiffImage(RandomAccessFileOrArray s, int page, bool direct)
{
if (page < 1)
{
throw new ArgumentException(MessageLocalization.GetComposedMessage("the.page.number.must.be.gt.eq.1"));
}
TIFFDirectory dir = new TIFFDirectory(s, page - 1);
if (dir.IsTagPresent(TIFFConstants.TIFFTAG_TILEWIDTH))
{
throw new ArgumentException(MessageLocalization.GetComposedMessage("tiles.are.not.supported"));
}
int compression = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_COMPRESSION);
switch (compression)
{
case TIFFConstants.COMPRESSION_CCITTRLEW:
case TIFFConstants.COMPRESSION_CCITTRLE:
case TIFFConstants.COMPRESSION_CCITTFAX3:
case TIFFConstants.COMPRESSION_CCITTFAX4:
break;
default:
return(GetTiffImageColor(dir, s));
}
float rotation = 0;
if (dir.IsTagPresent(TIFFConstants.TIFFTAG_ORIENTATION))
{
int rot = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_ORIENTATION);
if (rot == TIFFConstants.ORIENTATION_BOTRIGHT || rot == TIFFConstants.ORIENTATION_BOTLEFT)
{
rotation = (float)Math.PI;
}
else if (rot == TIFFConstants.ORIENTATION_LEFTTOP || rot == TIFFConstants.ORIENTATION_LEFTBOT)
{
rotation = (float)(Math.PI / 2.0);
}
else if (rot == TIFFConstants.ORIENTATION_RIGHTTOP || rot == TIFFConstants.ORIENTATION_RIGHTBOT)
{
rotation = -(float)(Math.PI / 2.0);
}
}
Image img = null;
long tiffT4Options = 0;
long tiffT6Options = 0;
int fillOrder = 1;
int h = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_IMAGELENGTH);
int w = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_IMAGEWIDTH);
int dpiX = 0;
int dpiY = 0;
float XYRatio = 0;
int resolutionUnit = TIFFConstants.RESUNIT_INCH;
if (dir.IsTagPresent(TIFFConstants.TIFFTAG_RESOLUTIONUNIT))
{
resolutionUnit = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_RESOLUTIONUNIT);
}
dpiX = GetDpi(dir.GetField(TIFFConstants.TIFFTAG_XRESOLUTION), resolutionUnit);
dpiY = GetDpi(dir.GetField(TIFFConstants.TIFFTAG_YRESOLUTION), resolutionUnit);
if (resolutionUnit == TIFFConstants.RESUNIT_NONE)
{
if (dpiY != 0)
{
XYRatio = (float)dpiX / (float)dpiY;
}
dpiX = 0;
dpiY = 0;
}
int rowsStrip = h;
if (dir.IsTagPresent(TIFFConstants.TIFFTAG_ROWSPERSTRIP))
{
rowsStrip = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_ROWSPERSTRIP);
}
if (rowsStrip <= 0 || rowsStrip > h)
{
rowsStrip = h;
}
long[] offset = GetArrayLongShort(dir, TIFFConstants.TIFFTAG_STRIPOFFSETS);
long[] size = GetArrayLongShort(dir, TIFFConstants.TIFFTAG_STRIPBYTECOUNTS);
if ((size == null || (size.Length == 1 && (size[0] == 0 || size[0] + offset[0] > s.Length))) && h == rowsStrip) // some TIFF producers are really lousy, so...
{
size = new long[] { s.Length - (int)offset[0] };
}
bool reverse = false;
TIFFField fillOrderField = dir.GetField(TIFFConstants.TIFFTAG_FILLORDER);
if (fillOrderField != null)
{
fillOrder = fillOrderField.GetAsInt(0);
}
reverse = (fillOrder == TIFFConstants.FILLORDER_LSB2MSB);
int paramsn = 0;
if (dir.IsTagPresent(TIFFConstants.TIFFTAG_PHOTOMETRIC))
{
long photo = dir.GetFieldAsLong(TIFFConstants.TIFFTAG_PHOTOMETRIC);
if (photo == TIFFConstants.PHOTOMETRIC_MINISBLACK)
{
paramsn |= Image.CCITT_BLACKIS1;
}
}
int imagecomp = 0;
switch (compression)
{
case TIFFConstants.COMPRESSION_CCITTRLEW:
case TIFFConstants.COMPRESSION_CCITTRLE:
imagecomp = Image.CCITTG3_1D;
paramsn |= Image.CCITT_ENCODEDBYTEALIGN | Image.CCITT_ENDOFBLOCK;
break;
case TIFFConstants.COMPRESSION_CCITTFAX3:
imagecomp = Image.CCITTG3_1D;
paramsn |= Image.CCITT_ENDOFLINE | Image.CCITT_ENDOFBLOCK;
TIFFField t4OptionsField = dir.GetField(TIFFConstants.TIFFTAG_GROUP3OPTIONS);
if (t4OptionsField != null)
{
tiffT4Options = t4OptionsField.GetAsLong(0);
if ((tiffT4Options & TIFFConstants.GROUP3OPT_2DENCODING) != 0)
{
imagecomp = Image.CCITTG3_2D;
}
if ((tiffT4Options & TIFFConstants.GROUP3OPT_FILLBITS) != 0)
{
paramsn |= Image.CCITT_ENCODEDBYTEALIGN;
}
}
break;
case TIFFConstants.COMPRESSION_CCITTFAX4:
imagecomp = Image.CCITTG4;
TIFFField t6OptionsField = dir.GetField(TIFFConstants.TIFFTAG_GROUP4OPTIONS);
if (t6OptionsField != null)
{
tiffT6Options = t6OptionsField.GetAsLong(0);
}
break;
}
if (direct && rowsStrip == h) //single strip, direct
{
byte[] im = new byte[(int)size[0]];
s.Seek(offset[0]);
s.ReadFully(im);
img = Image.GetInstance(w, h, false, imagecomp, paramsn, im);
img.Inverted = true;
}
else
{
int rowsLeft = h;
CCITTG4Encoder g4 = new CCITTG4Encoder(w);
for (int k = 0; k < offset.Length; ++k)
{
byte[] im = new byte[(int)size[k]];
s.Seek(offset[k]);
s.ReadFully(im);
int height = Math.Min(rowsStrip, rowsLeft);
TIFFFaxDecoder decoder = new TIFFFaxDecoder(fillOrder, w, height);
byte[] outBuf = new byte[(w + 7) / 8 * height];
switch (compression)
{
case TIFFConstants.COMPRESSION_CCITTRLEW:
case TIFFConstants.COMPRESSION_CCITTRLE:
decoder.Decode1D(outBuf, im, 0, height);
g4.Fax4Encode(outBuf, height);
break;
case TIFFConstants.COMPRESSION_CCITTFAX3:
try {
decoder.Decode2D(outBuf, im, 0, height, tiffT4Options);
}
catch (Exception e) {
// let's flip the fill bits and try again...
tiffT4Options ^= TIFFConstants.GROUP3OPT_FILLBITS;
try {
decoder.Decode2D(outBuf, im, 0, height, tiffT4Options);
}
catch {
throw e;
}
}
g4.Fax4Encode(outBuf, height);
break;
case TIFFConstants.COMPRESSION_CCITTFAX4:
decoder.DecodeT6(outBuf, im, 0, height, tiffT6Options);
g4.Fax4Encode(outBuf, height);
break;
}
rowsLeft -= rowsStrip;
}
byte[] g4pic = g4.Close();
img = Image.GetInstance(w, h, false, Image.CCITTG4, paramsn & Image.CCITT_BLACKIS1, g4pic);
}
img.SetDpi(dpiX, dpiY);
img.XYRatio = XYRatio;
if (dir.IsTagPresent(TIFFConstants.TIFFTAG_ICCPROFILE))
{
try {
TIFFField fd = dir.GetField(TIFFConstants.TIFFTAG_ICCPROFILE);
ICC_Profile icc_prof = ICC_Profile.GetInstance(fd.GetAsBytes());
if (icc_prof.NumComponents == 1)
{
img.TagICC = icc_prof;
}
}
catch {
//empty
}
}
img.OriginalType = Image.ORIGINAL_TIFF;
if (rotation != 0)
{
img.InitialRotation = rotation;
}
return(img);
}
public byte[] Decode(byte[] b, PdfName filterName, PdfObject decodeParams, PdfDictionary streamDictionary)
{
PdfNumber wn = (PdfNumber)PdfReader.GetPdfObjectRelease(streamDictionary.Get(PdfName.WIDTH));
PdfNumber hn = (PdfNumber)PdfReader.GetPdfObjectRelease(streamDictionary.Get(PdfName.HEIGHT));
if (wn == null || hn == null)
{
throw new UnsupportedPdfException(MessageLocalization.GetComposedMessage("filter.ccittfaxdecode.is.only.supported.for.images"));
}
int width = wn.IntValue;
int height = hn.IntValue;
PdfDictionary param = decodeParams is PdfDictionary ? (PdfDictionary)decodeParams : null;
int k = 0;
bool blackIs1 = false;
bool byteAlign = false;
if (param != null)
{
PdfNumber kn = param.GetAsNumber(PdfName.K);
if (kn != null)
{
k = kn.IntValue;
}
PdfBoolean bo = param.GetAsBoolean(PdfName.BLACKIS1);
if (bo != null)
{
blackIs1 = bo.BooleanValue;
}
bo = param.GetAsBoolean(PdfName.ENCODEDBYTEALIGN);
if (bo != null)
{
byteAlign = bo.BooleanValue;
}
}
byte[] outBuf = new byte[(width + 7) / 8 * height];
TIFFFaxDecompressor decoder = new TIFFFaxDecompressor();
if (k == 0 || k > 0)
{
int tiffT4Options = k > 0 ? TIFFConstants.GROUP3OPT_2DENCODING : 0;
tiffT4Options |= byteAlign ? TIFFConstants.GROUP3OPT_FILLBITS : 0;
decoder.SetOptions(1, TIFFConstants.COMPRESSION_CCITTFAX3, tiffT4Options, 0);
decoder.DecodeRaw(outBuf, b, width, height);
if (decoder.fails > 0)
{
byte[] outBuf2 = new byte[(width + 7) / 8 * height];
int oldFails = decoder.fails;
decoder.SetOptions(1, TIFFConstants.COMPRESSION_CCITTRLE, tiffT4Options, 0);
decoder.DecodeRaw(outBuf2, b, width, height);
if (decoder.fails < oldFails)
{
outBuf = outBuf2;
}
}
}
else
{
TIFFFaxDecoder deca = new TIFFFaxDecoder(1, width, height);
deca.DecodeT6(outBuf, b, 0, height, 0);
}
if (!blackIs1)
{
int len = outBuf.Length;
for (int t = 0; t < len; ++t)
{
outBuf[t] ^= 0xff;
}
}
b = outBuf;
return(b);
}
public virtual byte[] Decode(byte[] b, PdfName filterName, PdfObject decodeParams, PdfDictionary streamDictionary
)
{
PdfNumber wn = streamDictionary.GetAsNumber(PdfName.Width);
PdfNumber hn = streamDictionary.GetAsNumber(PdfName.Height);
if (wn == null || hn == null)
{
throw new PdfException(PdfException.FilterCcittfaxdecodeIsOnlySupportedForImages);
}
int width = wn.IntValue();
int height = hn.IntValue();
PdfDictionary param = decodeParams is PdfDictionary ? (PdfDictionary)decodeParams : null;
int k = 0;
bool blackIs1 = false;
bool byteAlign = false;
if (param != null)
{
PdfNumber kn = param.GetAsNumber(PdfName.K);
if (kn != null)
{
k = kn.IntValue();
}
PdfBoolean bo = param.GetAsBoolean(PdfName.BlackIs1);
if (bo != null)
{
blackIs1 = bo.GetValue();
}
bo = param.GetAsBoolean(PdfName.EncodedByteAlign);
if (bo != null)
{
byteAlign = bo.GetValue();
}
}
byte[] outBuf = new byte[(width + 7) / 8 * height];
TIFFFaxDecompressor decoder = new TIFFFaxDecompressor();
if (k == 0 || k > 0)
{
int tiffT4Options = k > 0 ? TIFFConstants.GROUP3OPT_2DENCODING : 0;
tiffT4Options |= byteAlign ? TIFFConstants.GROUP3OPT_FILLBITS : 0;
decoder.SetOptions(1, TIFFConstants.COMPRESSION_CCITTFAX3, tiffT4Options, 0);
decoder.DecodeRaw(outBuf, b, width, height);
if (decoder.fails > 0)
{
byte[] outBuf2 = new byte[(width + 7) / 8 * height];
int oldFails = decoder.fails;
decoder.SetOptions(1, TIFFConstants.COMPRESSION_CCITTRLE, tiffT4Options, 0);
decoder.DecodeRaw(outBuf2, b, width, height);
if (decoder.fails < oldFails)
{
outBuf = outBuf2;
}
}
}
else
{
TIFFFaxDecoder deca = new TIFFFaxDecoder(1, width, height);
deca.DecodeT6(outBuf, b, 0, height, 0);
}
if (!blackIs1)
{
int len = outBuf.Length;
for (int t = 0; t < len; ++t)
{
outBuf[t] ^= 0xff;
}
}
b = outBuf;
return(b);
}
protected static Image GetTiffImageColor(TIFFDirectory dir, RandomAccessFileOrArray s)
{
int predictor = 1;
TIFFLZWDecoder lzwDecoder = null;
int compression = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_COMPRESSION);
switch (compression)
{
case TIFFConstants.COMPRESSION_NONE:
case TIFFConstants.COMPRESSION_LZW:
case TIFFConstants.COMPRESSION_PACKBITS:
case TIFFConstants.COMPRESSION_DEFLATE:
case TIFFConstants.COMPRESSION_ADOBE_DEFLATE:
case TIFFConstants.COMPRESSION_OJPEG:
case TIFFConstants.COMPRESSION_JPEG:
break;
default:
throw new ArgumentException("The compression " + compression + " is not supported.");
}
int photometric = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_PHOTOMETRIC);
switch (photometric)
{
case TIFFConstants.PHOTOMETRIC_MINISWHITE:
case TIFFConstants.PHOTOMETRIC_MINISBLACK:
case TIFFConstants.PHOTOMETRIC_RGB:
case TIFFConstants.PHOTOMETRIC_SEPARATED:
case TIFFConstants.PHOTOMETRIC_PALETTE:
break;
default:
if (compression != TIFFConstants.COMPRESSION_OJPEG && compression != TIFFConstants.COMPRESSION_JPEG)
{
throw new ArgumentException("The photometric " + photometric + " is not supported.");
}
break;
}
float rotation = 0;
if (dir.IsTagPresent(TIFFConstants.TIFFTAG_ORIENTATION))
{
int rot = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_ORIENTATION);
if (rot == TIFFConstants.ORIENTATION_BOTRIGHT || rot == TIFFConstants.ORIENTATION_BOTLEFT)
{
rotation = (float)Math.PI;
}
else if (rot == TIFFConstants.ORIENTATION_LEFTTOP || rot == TIFFConstants.ORIENTATION_LEFTBOT)
{
rotation = (float)(Math.PI / 2.0);
}
else if (rot == TIFFConstants.ORIENTATION_RIGHTTOP || rot == TIFFConstants.ORIENTATION_RIGHTBOT)
{
rotation = -(float)(Math.PI / 2.0);
}
}
if (dir.IsTagPresent(TIFFConstants.TIFFTAG_PLANARCONFIG) &&
dir.GetFieldAsLong(TIFFConstants.TIFFTAG_PLANARCONFIG) == TIFFConstants.PLANARCONFIG_SEPARATE)
{
throw new ArgumentException("Planar images are not supported.");
}
if (dir.IsTagPresent(TIFFConstants.TIFFTAG_EXTRASAMPLES))
{
throw new ArgumentException("Extra samples are not supported.");
}
int samplePerPixel = 1;
if (dir.IsTagPresent(TIFFConstants.TIFFTAG_SAMPLESPERPIXEL)) // 1,3,4
{
samplePerPixel = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_SAMPLESPERPIXEL);
}
int bitsPerSample = 1;
if (dir.IsTagPresent(TIFFConstants.TIFFTAG_BITSPERSAMPLE))
{
bitsPerSample = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_BITSPERSAMPLE);
}
switch (bitsPerSample)
{
case 1:
case 2:
case 4:
case 8:
break;
default:
throw new ArgumentException("Bits per sample " + bitsPerSample + " is not supported.");
}
Image img = null;
int h = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_IMAGELENGTH);
int w = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_IMAGEWIDTH);
int dpiX = 0;
int dpiY = 0;
int resolutionUnit = TIFFConstants.RESUNIT_INCH;
if (dir.IsTagPresent(TIFFConstants.TIFFTAG_RESOLUTIONUNIT))
{
resolutionUnit = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_RESOLUTIONUNIT);
}
dpiX = GetDpi(dir.GetField(TIFFConstants.TIFFTAG_XRESOLUTION), resolutionUnit);
dpiY = GetDpi(dir.GetField(TIFFConstants.TIFFTAG_YRESOLUTION), resolutionUnit);
int fillOrder = 1;
bool reverse = false;
TIFFField fillOrderField = dir.GetField(TIFFConstants.TIFFTAG_FILLORDER);
if (fillOrderField != null)
{
fillOrder = fillOrderField.GetAsInt(0);
}
reverse = (fillOrder == TIFFConstants.FILLORDER_LSB2MSB);
int rowsStrip = h;
if (dir.IsTagPresent(TIFFConstants.TIFFTAG_ROWSPERSTRIP)) //another hack for broken tiffs
{
rowsStrip = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_ROWSPERSTRIP);
}
if (rowsStrip <= 0 || rowsStrip > h)
{
rowsStrip = h;
}
long[] offset = GetArrayLongShort(dir, TIFFConstants.TIFFTAG_STRIPOFFSETS);
long[] size = GetArrayLongShort(dir, TIFFConstants.TIFFTAG_STRIPBYTECOUNTS);
if ((size == null || (size.Length == 1 && (size[0] == 0 || size[0] + offset[0] > s.Length))) && h == rowsStrip) // some TIFF producers are really lousy, so...
{
size = new long[] { s.Length - (int)offset[0] };
}
if (compression == TIFFConstants.COMPRESSION_LZW)
{
TIFFField predictorField = dir.GetField(TIFFConstants.TIFFTAG_PREDICTOR);
if (predictorField != null)
{
predictor = predictorField.GetAsInt(0);
if (predictor != 1 && predictor != 2)
{
throw new Exception("Illegal value for Predictor in TIFF file.");
}
if (predictor == 2 && bitsPerSample != 8)
{
throw new Exception(bitsPerSample + "-bit samples are not supported for Horizontal differencing Predictor.");
}
}
lzwDecoder = new TIFFLZWDecoder(w, predictor,
samplePerPixel);
}
int rowsLeft = h;
MemoryStream stream = null;
ZDeflaterOutputStream zip = null;
CCITTG4Encoder g4 = null;
if (bitsPerSample == 1 && samplePerPixel == 1)
{
g4 = new CCITTG4Encoder(w);
}
else
{
stream = new MemoryStream();
if (compression != TIFFConstants.COMPRESSION_OJPEG && compression != TIFFConstants.COMPRESSION_JPEG)
{
zip = new ZDeflaterOutputStream(stream);
}
}
if (compression == TIFFConstants.COMPRESSION_OJPEG)
{
// Assume that the TIFFTAG_JPEGIFBYTECOUNT tag is optional, since it's obsolete and
// is often missing
if ((!dir.IsTagPresent(TIFFConstants.TIFFTAG_JPEGIFOFFSET)))
{
throw new IOException("Missing tag(s) for OJPEG compression.");
}
int jpegOffset = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_JPEGIFOFFSET);
int jpegLength = s.Length - jpegOffset;
if (dir.IsTagPresent(TIFFConstants.TIFFTAG_JPEGIFBYTECOUNT))
{
jpegLength = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_JPEGIFBYTECOUNT) +
(int)size[0];
}
byte[] jpeg = new byte[Math.Min(jpegLength, s.Length - jpegOffset)];
int posFilePointer = s.FilePointer;
posFilePointer += jpegOffset;
s.Seek(posFilePointer);
s.ReadFully(jpeg);
img = new Jpeg(jpeg);
}
else if (compression == TIFFConstants.COMPRESSION_JPEG)
{
if (size.Length > 1)
{
throw new IOException("Compression JPEG is only supported with a single strip. This image has " + size.Length + " strips.");
}
byte[] jpeg = new byte[(int)size[0]];
s.Seek(offset[0]);
s.ReadFully(jpeg);
img = new Jpeg(jpeg);
}
else
{
for (int k = 0; k < offset.Length; ++k)
{
byte[] im = new byte[(int)size[k]];
s.Seek(offset[k]);
s.ReadFully(im);
int height = Math.Min(rowsStrip, rowsLeft);
byte[] outBuf = null;
if (compression != TIFFConstants.COMPRESSION_NONE)
{
outBuf = new byte[(w * bitsPerSample * samplePerPixel + 7) / 8 * height];
}
if (reverse)
{
TIFFFaxDecoder.ReverseBits(im);
}
switch (compression)
{
case TIFFConstants.COMPRESSION_DEFLATE:
case TIFFConstants.COMPRESSION_ADOBE_DEFLATE:
Inflate(im, outBuf);
break;
case TIFFConstants.COMPRESSION_NONE:
outBuf = im;
break;
case TIFFConstants.COMPRESSION_PACKBITS:
DecodePackbits(im, outBuf);
break;
case TIFFConstants.COMPRESSION_LZW:
lzwDecoder.Decode(im, outBuf, height);
break;
}
if (bitsPerSample == 1 && samplePerPixel == 1)
{
g4.Fax4Encode(outBuf, height);
}
else
{
zip.Write(outBuf, 0, outBuf.Length);
}
rowsLeft -= rowsStrip;
}
if (bitsPerSample == 1 && samplePerPixel == 1)
{
img = Image.GetInstance(w, h, false, Image.CCITTG4,
photometric == TIFFConstants.PHOTOMETRIC_MINISBLACK ? Image.CCITT_BLACKIS1 : 0, g4.Close());
}
else
{
zip.Close();
img = Image.GetInstance(w, h, samplePerPixel, bitsPerSample, stream.ToArray());
img.Deflated = true;
}
}
img.SetDpi(dpiX, dpiY);
if (compression != TIFFConstants.COMPRESSION_OJPEG && compression != TIFFConstants.COMPRESSION_JPEG)
{
if (dir.IsTagPresent(TIFFConstants.TIFFTAG_ICCPROFILE))
{
try {
TIFFField fd = dir.GetField(TIFFConstants.TIFFTAG_ICCPROFILE);
ICC_Profile icc_prof = ICC_Profile.GetInstance(fd.GetAsBytes());
if (samplePerPixel == icc_prof.NumComponents)
{
img.TagICC = icc_prof;
}
}
catch {
//empty
}
}
if (dir.IsTagPresent(TIFFConstants.TIFFTAG_COLORMAP))
{
TIFFField fd = dir.GetField(TIFFConstants.TIFFTAG_COLORMAP);
char[] rgb = fd.GetAsChars();
byte[] palette = new byte[rgb.Length];
int gColor = rgb.Length / 3;
int bColor = gColor * 2;
for (int k = 0; k < gColor; ++k)
{
palette[k * 3] = (byte)(rgb[k] >> 8);
palette[k * 3 + 1] = (byte)(rgb[k + gColor] >> 8);
palette[k * 3 + 2] = (byte)(rgb[k + bColor] >> 8);
}
PdfArray indexed = new PdfArray();
indexed.Add(PdfName.INDEXED);
indexed.Add(PdfName.DEVICERGB);
indexed.Add(new PdfNumber(gColor - 1));
indexed.Add(new PdfString(palette));
PdfDictionary additional = new PdfDictionary();
additional.Put(PdfName.COLORSPACE, indexed);
img.Additional = additional;
}
img.OriginalType = Image.ORIGINAL_TIFF;
}
if (photometric == TIFFConstants.PHOTOMETRIC_MINISWHITE)
{
img.Inverted = true;
}
if (rotation != 0)
{
img.InitialRotation = rotation;
}
return(img);
}
