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);
}
}
/// <exception cref="System.IO.IOException"/>
private static void ProcessPng(Stream pngStream, PngImageHelper.PngParameters png)
{
ReadPng(pngStream, png);
if (png.iccProfile != null && png.iccProfile.GetNumComponents() != GetExpectedNumberOfColorComponents(png)
)
{
LogManager.GetLogger(typeof(PngImageHelper)).Warn(iText.IO.LogMessageConstant.PNG_IMAGE_HAS_ICC_PROFILE_WITH_INCOMPATIBLE_NUMBER_OF_COLOR_COMPONENTS
);
}
try {
int pal0 = 0;
int palIdx = 0;
png.palShades = false;
if (png.trans != null)
{
for (int k = 0; k < png.trans.Length; ++k)
{
int n = png.trans[k] & 0xff;
if (n == 0)
{
++pal0;
palIdx = k;
}
if (n != 0 && n != 255)
{
png.palShades = true;
break;
}
}
}
if ((png.colorType & 4) != 0)
{
png.palShades = true;
}
png.genBWMask = (!png.palShades && (pal0 > 1 || png.transRedGray >= 0));
if (!png.palShades && !png.genBWMask && pal0 == 1)
{
png.additional.Put("Mask", new int[] { palIdx, palIdx });
}
bool needDecode = (png.interlaceMethod == 1) || (png.bitDepth == 16) || ((png.colorType & 4) != 0) || png.
palShades || png.genBWMask;
switch (png.colorType)
{
case 0: {
png.inputBands = 1;
break;
}
case 2: {
png.inputBands = 3;
break;
}
case 3: {
png.inputBands = 1;
break;
}
case 4: {
png.inputBands = 2;
break;
}
case 6: {
png.inputBands = 4;
break;
}
}
if (needDecode)
{
DecodeIdat(png);
}
int components = png.inputBands;
if ((png.colorType & 4) != 0)
{
--components;
}
int bpc = png.bitDepth;
if (bpc == 16)
{
bpc = 8;
}
if (png.imageData != null)
{
if (png.colorType == 3)
{
RawImageHelper.UpdateRawImageParameters(png.image, png.width, png.height, components, bpc, png.imageData);
}
else
{
RawImageHelper.UpdateRawImageParameters(png.image, png.width, png.height, components, bpc, png.imageData,
null);
}
}
else
{
RawImageHelper.UpdateRawImageParameters(png.image, png.width, png.height, components, bpc, png.idat.ToArray
());
png.image.SetDeflated(true);
IDictionary <String, Object> decodeparms = new Dictionary <String, Object>();
decodeparms.Put("BitsPerComponent", png.bitDepth);
decodeparms.Put("Predictor", 15);
decodeparms.Put("Columns", png.width);
decodeparms.Put("Colors", (png.colorType == 3 || (png.colorType & 2) == 0) ? 1 : 3);
png.image.decodeParms = decodeparms;
}
if (png.additional.Get("ColorSpace") == null)
{
png.additional.Put("ColorSpace", GetColorspace(png));
}
if (png.intent != null)
{
png.additional.Put("Intent", png.intent);
}
if (png.iccProfile != null)
{
png.image.SetProfile(png.iccProfile);
}
if (png.palShades)
{
RawImageData im2 = (RawImageData)ImageDataFactory.CreateRawImage(null);
RawImageHelper.UpdateRawImageParameters(im2, png.width, png.height, 1, 8, png.smask);
im2.MakeMask();
png.image.SetImageMask(im2);
}
if (png.genBWMask)
{
RawImageData im2 = (RawImageData)ImageDataFactory.CreateRawImage(null);
RawImageHelper.UpdateRawImageParameters(im2, png.width, png.height, 1, 1, png.smask);
im2.MakeMask();
png.image.SetImageMask(im2);
}
png.image.SetDpi(png.dpiX, png.dpiY);
png.image.SetXYRatio(png.XYRatio);
}
catch (Exception e) {
throw new iText.IO.IOException(iText.IO.IOException.PngImageException, e);
}
}
/// <exception cref="System.IO.IOException"/>
private static void ProcessPng(Stream pngStream, PngImageHelper.PngParameters png)
{
ReadPng(pngStream, png);
try {
int pal0 = 0;
int palIdx = 0;
png.palShades = false;
if (png.trans != null)
{
for (int k = 0; k < png.trans.Length; ++k)
{
int n = png.trans[k] & 0xff;
if (n == 0)
{
++pal0;
palIdx = k;
}
if (n != 0 && n != 255)
{
png.palShades = true;
break;
}
}
}
if ((png.colorType & 4) != 0)
{
png.palShades = true;
}
png.genBWMask = (!png.palShades && (pal0 > 1 || png.transRedGray >= 0));
if (!png.palShades && !png.genBWMask && pal0 == 1)
{
png.additional["Mask"] = String.Format("[{0} {1}]", palIdx, palIdx);
}
bool needDecode = (png.interlaceMethod == 1) || (png.bitDepth == 16) || ((png.colorType & 4) != 0) || png.
palShades || png.genBWMask;
switch (png.colorType)
{
case 0: {
png.inputBands = 1;
break;
}
case 2: {
png.inputBands = 3;
break;
}
case 3: {
png.inputBands = 1;
break;
}
case 4: {
png.inputBands = 2;
break;
}
case 6: {
png.inputBands = 4;
break;
}
}
if (needDecode)
{
DecodeIdat(png);
}
int components = png.inputBands;
if ((png.colorType & 4) != 0)
{
--components;
}
int bpc = png.bitDepth;
if (bpc == 16)
{
bpc = 8;
}
if (png.imageData != null)
{
if (png.colorType == 3)
{
RawImageHelper.UpdateRawImageParameters(png.image, png.width, png.height, components, bpc, png.imageData);
}
else
{
RawImageHelper.UpdateRawImageParameters(png.image, png.width, png.height, components, bpc, png.imageData,
null);
}
}
else
{
RawImageHelper.UpdateRawImageParameters(png.image, png.width, png.height, components, bpc, png.idat.ToArray
());
png.image.SetDeflated(true);
IDictionary <String, Object> decodeparms = new Dictionary <String, Object>();
decodeparms["BitsPerComponent"] = png.bitDepth;
decodeparms["Predictor"] = 15;
decodeparms["Columns"] = png.width;
decodeparms["Colors"] = (png.colorType == 3 || (png.colorType & 2) == 0) ? 1 : 3;
png.image.decodeParms = decodeparms;
}
if (png.additional.Get("ColorSpace") == null)
{
png.additional["ColorSpace"] = GetColorspace(png);
}
if (png.intent != null)
{
png.additional["Intent"] = png.intent;
}
if (png.iccProfile != null)
{
png.image.SetProfile(png.iccProfile);
}
if (png.palShades)
{
RawImageData im2 = (RawImageData)ImageDataFactory.CreateRawImage(null);
RawImageHelper.UpdateRawImageParameters(im2, png.width, png.height, 1, 8, png.smask);
im2.MakeMask();
png.image.SetImageMask(im2);
}
if (png.genBWMask)
{
RawImageData im2 = (RawImageData)ImageDataFactory.CreateRawImage(null);
RawImageHelper.UpdateRawImageParameters(im2, png.width, png.height, 1, 1, png.smask);
im2.MakeMask();
png.image.SetImageMask(im2);
}
png.image.SetDpi(png.dpiX, png.dpiY);
png.image.SetXYRatio(png.XYRatio);
}
catch (Exception e) {
throw new iText.IO.IOException(iText.IO.IOException.PngImageException, e);
}
}