void ReadPng()
{
for (int i = 0; i < PNGID.Length; i++) {
if (PNGID[i] != isp.ReadByte()) {
throw new IOException("File is not a valid PNG.");
}
}
byte[] buffer = new byte[TRANSFERSIZE];
while (true) {
int len = GetInt(isp);
String marker = GetString(isp);
if (len < 0 || !CheckMarker(marker))
throw new IOException("Corrupted PNG file.");
if (IDAT.Equals(marker)) {
int size;
while (len != 0) {
size = isp.Read(buffer, 0, Math.Min(len, TRANSFERSIZE));
if (size <= 0)
return;
idat.Write(buffer, 0, size);
len -= size;
}
}
else if (tRNS.Equals(marker)) {
switch (colorType) {
case 0:
if (len >= 2) {
len -= 2;
int gray = GetWord(isp);
if (bitDepth == 16)
transRedGray = gray;
else
additional.Put(PdfName.MASK, new PdfLiteral("["+gray+" "+gray+"]"));
}
break;
case 2:
if (len >= 6) {
len -= 6;
int red = GetWord(isp);
int green = GetWord(isp);
int blue = GetWord(isp);
if (bitDepth == 16) {
transRedGray = red;
transGreen = green;
transBlue = blue;
}
else
additional.Put(PdfName.MASK, new PdfLiteral("["+red+" "+red+" "+green+" "+green+" "+blue+" "+blue+"]"));
}
break;
case 3:
if (len > 0) {
trans = new byte[len];
for (int k = 0; k < len; ++k)
trans[k] = (byte)isp.ReadByte();
len = 0;
}
break;
}
Utilities.Skip(isp, len);
}
else if (IHDR.Equals(marker)) {
width = GetInt(isp);
height = GetInt(isp);
bitDepth = isp.ReadByte();
colorType = isp.ReadByte();
compressionMethod = isp.ReadByte();
filterMethod = isp.ReadByte();
interlaceMethod = isp.ReadByte();
}
else if (PLTE.Equals(marker)) {
if (colorType == 3) {
PdfArray colorspace = new PdfArray();
colorspace.Add(PdfName.INDEXED);
colorspace.Add(GetColorspace());
colorspace.Add(new PdfNumber(len / 3 - 1));
ByteBuffer colortable = new ByteBuffer();
while ((len--) > 0) {
colortable.Append_i(isp.ReadByte());
}
colorspace.Add(new PdfString(colorTable = colortable.ToByteArray()));
additional.Put(PdfName.COLORSPACE, colorspace);
}
else {
Utilities.Skip(isp, len);
}
}
else if (pHYs.Equals(marker)) {
int dx = GetInt(isp);
int dy = GetInt(isp);
int unit = isp.ReadByte();
if (unit == 1) {
dpiX = (int)((float)dx * 0.0254f + 0.5f);
dpiY = (int)((float)dy * 0.0254f + 0.5f);
}
else {
if (dy != 0)
XYRatio = (float)dx / (float)dy;
}
}
else if (cHRM.Equals(marker)) {
xW = (float)GetInt(isp) / 100000f;
yW = (float)GetInt(isp) / 100000f;
xR = (float)GetInt(isp) / 100000f;
yR = (float)GetInt(isp) / 100000f;
xG = (float)GetInt(isp) / 100000f;
yG = (float)GetInt(isp) / 100000f;
xB = (float)GetInt(isp) / 100000f;
yB = (float)GetInt(isp) / 100000f;
hasCHRM = !(Math.Abs(xW)<0.0001f||Math.Abs(yW)<0.0001f||Math.Abs(xR)<0.0001f||Math.Abs(yR)<0.0001f||Math.Abs(xG)<0.0001f||Math.Abs(yG)<0.0001f||Math.Abs(xB)<0.0001f||Math.Abs(yB)<0.0001f);
}
else if (sRGB.Equals(marker)) {
int ri = isp.ReadByte();
intent = intents[ri];
gamma = 2.2f;
xW = 0.3127f;
yW = 0.329f;
xR = 0.64f;
yR = 0.33f;
xG = 0.3f;
yG = 0.6f;
xB = 0.15f;
yB = 0.06f;
hasCHRM = true;
}
else if (gAMA.Equals(marker)) {
int gm = GetInt(isp);
if (gm != 0) {
gamma = 100000f / (float)gm;
if (!hasCHRM) {
xW = 0.3127f;
yW = 0.329f;
xR = 0.64f;
yR = 0.33f;
xG = 0.3f;
yG = 0.6f;
xB = 0.15f;
yB = 0.06f;
hasCHRM = true;
}
}
}
else if (iCCP.Equals(marker)) {
do {
--len;
} while (isp.ReadByte() != 0);
isp.ReadByte();
--len;
byte[] icccom = new byte[len];
int p = 0;
while (len > 0) {
int r = isp.Read(icccom, p, len);
if (r < 0)
throw new IOException("Premature end of file.");
p += r;
len -= r;
}
byte[] iccp = PdfReader.FlateDecode(icccom, true);
icccom = null;
try {
icc_profile = ICC_Profile.GetInstance(iccp);
}
catch {
icc_profile = null;
}
}
else if (IEND.Equals(marker)) {
break;
}
else {
Utilities.Skip(isp, len);
}
Utilities.Skip(isp, 4);
}
}
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);
if (photometric == TIFFConstants.PHOTOMETRIC_RGB)
{
img.ColorTransform = 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:
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);
}
// private methods
/// <summary>
/// This method checks if the image is a valid JPEG and processes some parameters.
/// </summary>
private void ProcessParameters()
{
type = Element.JPEG;
originalType = ORIGINAL_JPEG;
Stream istr = null;
try {
string errorID;
if (rawData == null)
{
WebRequest w = WebRequest.Create(url);
w.Credentials = CredentialCache.DefaultCredentials;
istr = w.GetResponse().GetResponseStream();
errorID = url.ToString();
}
else
{
istr = new MemoryStream(rawData);
errorID = "Byte array";
}
if (istr.ReadByte() != 0xFF || istr.ReadByte() != 0xD8)
{
throw new BadElementException(MessageLocalization.GetComposedMessage("1.is.not.a.valid.jpeg.file", errorID));
}
bool firstPass = true;
int len;
while (true)
{
int v = istr.ReadByte();
if (v < 0)
{
throw new IOException(MessageLocalization.GetComposedMessage("premature.eof.while.reading.jpg"));
}
if (v == 0xFF)
{
int marker = istr.ReadByte();
if (firstPass && marker == M_APP0)
{
firstPass = false;
len = GetShort(istr);
if (len < 16)
{
Utilities.Skip(istr, len - 2);
continue;
}
byte[] bcomp = new byte[JFIF_ID.Length];
int r = istr.Read(bcomp, 0, bcomp.Length);
if (r != bcomp.Length)
{
throw new BadElementException(MessageLocalization.GetComposedMessage("1.corrupted.jfif.marker", errorID));
}
bool found = true;
for (int k = 0; k < bcomp.Length; ++k)
{
if (bcomp[k] != JFIF_ID[k])
{
found = false;
break;
}
}
if (!found)
{
Utilities.Skip(istr, len - 2 - bcomp.Length);
continue;
}
Utilities.Skip(istr, 2);
int units = istr.ReadByte();
int dx = GetShort(istr);
int dy = GetShort(istr);
if (units == 1)
{
dpiX = dx;
dpiY = dy;
}
else if (units == 2)
{
dpiX = (int)((float)dx * 2.54f + 0.5f);
dpiY = (int)((float)dy * 2.54f + 0.5f);
}
Utilities.Skip(istr, len - 2 - bcomp.Length - 7);
continue;
}
if (marker == M_APPE)
{
len = GetShort(istr) - 2;
byte[] byteappe = new byte[len];
for (int k = 0; k < len; ++k)
{
byteappe[k] = (byte)istr.ReadByte();
}
if (byteappe.Length >= 12)
{
string appe = System.Text.ASCIIEncoding.ASCII.GetString(byteappe, 0, 5);
if (Util.EqualsIgnoreCase(appe, "adobe"))
{
invert = true;
}
}
continue;
}
if (marker == M_APP2)
{
len = GetShort(istr) - 2;
byte[] byteapp2 = new byte[len];
for (int k = 0; k < len; ++k)
{
byteapp2[k] = (byte)istr.ReadByte();
}
if (byteapp2.Length >= 14)
{
String app2 = System.Text.ASCIIEncoding.ASCII.GetString(byteapp2, 0, 11);
if (app2.Equals("ICC_PROFILE"))
{
int order = byteapp2[12] & 0xff;
int count = byteapp2[13] & 0xff;
// some jpeg producers don't know how to count to 1
if (order < 1)
{
order = 1;
}
if (count < 1)
{
count = 1;
}
if (icc == null)
{
icc = new byte[count][];
}
icc[order - 1] = byteapp2;
}
}
continue;
}
if (marker == M_APPD)
{
len = GetShort(istr) - 2;
byte[] byteappd = new byte[len];
for (int k = 0; k < len; k++)
{
byteappd[k] = (byte)istr.ReadByte();
}
// search for '8BIM Resolution' marker
int j = 0;
for (j = 0; j < len - PS_8BIM_RESO.Length; j++)
{
bool found = true;
for (int i = 0; i < PS_8BIM_RESO.Length; i++)
{
if (byteappd[j + i] != PS_8BIM_RESO[i])
{
found = false;
break;
}
}
if (found)
{
break;
}
}
j += PS_8BIM_RESO.Length;
if (j < len - PS_8BIM_RESO.Length)
{
// "PASCAL String" for name, i.e. string prefix with length byte
// padded to be even length; 2 null bytes if empty
byte namelength = byteappd[j];
// add length byte
namelength++;
// add padding
if (namelength % 2 == 1)
{
namelength++;
}
// just skip name
j += namelength;
// size of the resolution data
int resosize = (byteappd[j] << 24) + (byteappd[j + 1] << 16) + (byteappd[j + 2] << 8) + byteappd[j + 3];
// should be 16
if (resosize != 16)
{
// fail silently, for now
//System.err.println("DEBUG: unsupported resolution IRB size");
continue;
}
j += 4;
int dx = (byteappd[j] << 8) + (byteappd[j + 1] & 0xff);
j += 2;
// skip 2 unknown bytes
j += 2;
int unitsx = (byteappd[j] << 8) + (byteappd[j + 1] & 0xff);
j += 2;
// skip 2 unknown bytes
j += 2;
int dy = (byteappd[j] << 8) + (byteappd[j + 1] & 0xff);
j += 2;
// skip 2 unknown bytes
j += 2;
int unitsy = (byteappd[j] << 8) + (byteappd[j + 1] & 0xff);
if (unitsx == 1 || unitsx == 2)
{
dx = (unitsx == 2 ? (int)(dx * 2.54f + 0.5f) : dx);
// make sure this is consistent with JFIF data
if (dpiX != 0 && dpiX != dx)
{
//System.err.println("DEBUG: inconsistent metadata (dpiX: " + dpiX + " vs " + dx + ")");
}
else
{
dpiX = dx;
}
}
if (unitsy == 1 || unitsy == 2)
{
dy = (unitsy == 2 ? (int)(dy * 2.54f + 0.5f) : dy);
// make sure this is consistent with JFIF data
if (dpiY != 0 && dpiY != dy)
{
//System.err.println("DEBUG: inconsistent metadata (dpiY: " + dpiY + " vs " + dy + ")");
}
else
{
dpiY = dy;
}
}
}
continue;
}
firstPass = false;
int markertype = MarkerType(marker);
if (markertype == VALID_MARKER)
{
Utilities.Skip(istr, 2);
if (istr.ReadByte() != 0x08)
{
throw new BadElementException(MessageLocalization.GetComposedMessage("1.must.have.8.bits.per.component", errorID));
}
scaledHeight = GetShort(istr);
Top = scaledHeight;
scaledWidth = GetShort(istr);
Right = scaledWidth;
colorspace = istr.ReadByte();
bpc = 8;
break;
}
else if (markertype == UNSUPPORTED_MARKER)
{
throw new BadElementException(MessageLocalization.GetComposedMessage("1.unsupported.jpeg.marker.2", errorID, marker));
}
else if (markertype != NOPARAM_MARKER)
{
Utilities.Skip(istr, GetShort(istr) - 2);
}
}
}
}
finally {
if (istr != null)
{
istr.Close();
}
}
plainWidth = this.Width;
plainHeight = this.Height;
if (icc != null)
{
int total = 0;
for (int k = 0; k < icc.Length; ++k)
{
if (icc[k] == null)
{
icc = null;
return;
}
total += icc[k].Length - 14;
}
byte[] ficc = new byte[total];
total = 0;
for (int k = 0; k < icc.Length; ++k)
{
System.Array.Copy(icc[k], 14, ficc, total, icc[k].Length - 14);
total += icc[k].Length - 14;
}
try {
ICC_Profile icc_prof = ICC_Profile.GetInstance(ficc, colorspace);
TagICC = icc_prof;
}
catch {}
icc = null;
}
}
/** 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);
}
// private methods
/// <summary>
/// This method checks if the image is a valid JPEG and processes some parameters.
/// </summary>
private void ProcessParameters()
{
type = Element.JPEG;
originalType = ORIGINAL_JPEG;
Stream istr = null;
try {
string errorID;
if (rawData == null)
{
WebRequest w = WebRequest.Create(url);
w.Credentials = CredentialCache.DefaultCredentials;
istr = w.GetResponse().GetResponseStream();
errorID = url.ToString();
}
else
{
istr = new MemoryStream(rawData);
errorID = "Byte array";
}
if (istr.ReadByte() != 0xFF || istr.ReadByte() != 0xD8)
{
throw new BadElementException(MessageLocalization.GetComposedMessage("1.is.not.a.valid.jpeg.file", errorID));
}
bool firstPass = true;
int len;
while (true)
{
int v = istr.ReadByte();
if (v < 0)
{
throw new IOException(MessageLocalization.GetComposedMessage("premature.eof.while.reading.jpg"));
}
if (v == 0xFF)
{
int marker = istr.ReadByte();
if (firstPass && marker == M_APP0)
{
firstPass = false;
len = GetShort(istr);
if (len < 16)
{
Utilities.Skip(istr, len - 2);
continue;
}
byte[] bcomp = new byte[JFIF_ID.Length];
int r = istr.Read(bcomp, 0, bcomp.Length);
if (r != bcomp.Length)
{
throw new BadElementException(MessageLocalization.GetComposedMessage("1.corrupted.jfif.marker", errorID));
}
bool found = true;
for (int k = 0; k < bcomp.Length; ++k)
{
if (bcomp[k] != JFIF_ID[k])
{
found = false;
break;
}
}
if (!found)
{
Utilities.Skip(istr, len - 2 - bcomp.Length);
continue;
}
Utilities.Skip(istr, 2);
int units = istr.ReadByte();
int dx = GetShort(istr);
int dy = GetShort(istr);
if (units == 1)
{
dpiX = dx;
dpiY = dy;
}
else if (units == 2)
{
dpiX = (int)((float)dx * 2.54f + 0.5f);
dpiY = (int)((float)dy * 2.54f + 0.5f);
}
Utilities.Skip(istr, len - 2 - bcomp.Length - 7);
continue;
}
if (marker == M_APPE)
{
len = GetShort(istr) - 2;
byte[] byteappe = new byte[len];
for (int k = 0; k < len; ++k)
{
byteappe[k] = (byte)istr.ReadByte();
}
if (byteappe.Length >= 12)
{
string appe = System.Text.ASCIIEncoding.ASCII.GetString(byteappe, 0, 5);
if (Util.EqualsIgnoreCase(appe, "adobe"))
{
invert = true;
}
}
continue;
}
if (marker == M_APP2)
{
len = GetShort(istr) - 2;
byte[] byteapp2 = new byte[len];
for (int k = 0; k < len; ++k)
{
byteapp2[k] = (byte)istr.ReadByte();
}
if (byteapp2.Length >= 14)
{
String app2 = System.Text.ASCIIEncoding.ASCII.GetString(byteapp2, 0, 11);
if (app2.Equals("ICC_PROFILE"))
{
int order = byteapp2[12] & 0xff;
int count = byteapp2[13] & 0xff;
// some jpeg producers don't know how to count to 1
if (order < 1)
{
order = 1;
}
if (count < 1)
{
count = 1;
}
if (icc == null)
{
icc = new byte[count][];
}
icc[order - 1] = byteapp2;
}
}
continue;
}
firstPass = false;
int markertype = MarkerType(marker);
if (markertype == VALID_MARKER)
{
Utilities.Skip(istr, 2);
if (istr.ReadByte() != 0x08)
{
throw new BadElementException(MessageLocalization.GetComposedMessage("1.must.have.8.bits.per.component", errorID));
}
scaledHeight = GetShort(istr);
Top = scaledHeight;
scaledWidth = GetShort(istr);
Right = scaledWidth;
colorspace = istr.ReadByte();
bpc = 8;
break;
}
else if (markertype == UNSUPPORTED_MARKER)
{
throw new BadElementException(MessageLocalization.GetComposedMessage("1.unsupported.jpeg.marker.2", errorID, marker));
}
else if (markertype != NOPARAM_MARKER)
{
Utilities.Skip(istr, GetShort(istr) - 2);
}
}
}
}
finally {
if (istr != null)
{
istr.Close();
}
}
plainWidth = this.Width;
plainHeight = this.Height;
if (icc != null)
{
int total = 0;
for (int k = 0; k < icc.Length; ++k)
{
if (icc[k] == null)
{
icc = null;
return;
}
total += icc[k].Length - 14;
}
byte[] ficc = new byte[total];
total = 0;
for (int k = 0; k < icc.Length; ++k)
{
System.Array.Copy(icc[k], 14, ficc, total, icc[k].Length - 14);
total += icc[k].Length - 14;
}
try {
ICC_Profile icc_prof = ICC_Profile.GetInstance(ficc);
TagICC = icc_prof;
}
catch {}
icc = null;
}
}
