The example only works with single strip tiffs. With multiple strip you have
to extract each strip as an image and assemble the images in the pdf. This
is a way to do it:
public static void convert2(File inputFile, File outputFile) {
Document document = new Document(PageSize.LETTER, 0, 0, 0, 0);
try {
PdfWriter writer = PdfWriter.getInstance(document, new
FileOutputStream(outputFile));
SeekableStream s = new FileSeekableStream(inputFile);
TIFFDirectory dir = new TIFFDirectory(s, 0);
long IFDOffset = dir.getIFDOffset();
document.open();
PdfContentByte cb = writer.getDirectContent();
while (IFDOffset != 0L) {
System.err.println("entering loop");
dir = new TIFFDirectory(s, IFDOffset, 0);
IFDOffset = dir.getNextIFDOffset();
long h =
dir.getFieldAsLong(TIFFImageDecoder.TIFF_IMAGE_LENGTH);
long w =
dir.getFieldAsLong(TIFFImageDecoder.TIFF_IMAGE_WIDTH);
long rowsStrip =
dir.getFieldAsLong(TIFFImageDecoder.TIFF_ROWS_PER_STRIP);
TIFFField field =
dir.getField(TIFFImageDecoder.TIFF_STRIP_OFFSETS);
long offset[];
if (field.getType() == TIFFField.TIFF_LONG)
offset = field.getAsLongs();
else { // must be short
short temp[] = field.getAsShorts();
offset = new long[temp.length];
for (int k = 0; k < temp.length; ++k)
offset[k] = temp[k];
}
field =
dir.getField(TIFFImageDecoder.TIFF_STRIP_BYTE_COUNTS);
long size[];
if (field.getType() == TIFFField.TIFF_LONG)
size = field.getAsLongs();
else { // must be short
short temp[] = field.getAsShorts();
size = new long[temp.length];
for (int k = 0; k < temp.length; ++k)
size[k] = temp[k];
}
boolean reverse = false;
if (dir.isTagPresent(TIFFImageDecoder.TIFF_FILL_ORDER))
reverse =
(dir.getFieldAsLong(TIFFImageDecoder.TIFF_FILL_ORDER) == 2L);
int compression = (int)
dir.getFieldAsLong(TIFFImageDecoder.TIFF_COMPRESSION);
switch (compression) {
case TIFFImage.COMP_FAX_G3_1D:
System.err.println("TIFFImage.COMP_FAX_G3_1D");
compression = Image.CCITTG3_1D;
break;
case TIFFImage.COMP_FAX_G3_2D:
System.err.println("TIFFImage.COMP_FAX_G3_2D");
compression = Image.CCITTG3_1D;
if
(dir.isTagPresent(TIFFImageDecoder.TIFF_T4_OPTIONS)) {
if (((int)
dir.getFieldAsLong(TIFFImageDecoder.TIFF_T4_OPTIONS) & 1) != 0)
compression = Image.CCITTG3_2D;
}
break;
case TIFFImage.COMP_FAX_G4_2D:
System.err.println("TIFFImage.COMP_FAX_G4_2D");
compression = Image.CCITTG4;
break;
default:
throw new Exception("Compression type " +
compression + " not supported");
}
long rowsLeft = h;
for (int k = 0; k < offset.length; ++k) {
byte im[] = new byte[(int) size[k]];
s.seek(offset[k]);
s.readFully(im);
Image img = Image.getInstance((int) w, (int)
Math.min(rowsStrip, rowsLeft), reverse, compression, 0, im);
rowsLeft -= rowsStrip;
img.scalePercent(72f / 200f * 100);
document.add(img);
}
boolean result = document.newPage();
}
document.close();
}
catch (Exception de) {
de.printStackTrace();
}
}
You can also use the example Chap0611.java although it's slower and the
memory usage is higher. The final pdf size is the same.
Best Regards,
Paulo Soares
> -----Original Message-----
> From: Elamathi Sambandam [SMTP:[EMAIL PROTECTED]]
> Sent: Thursday, May 02, 2002 17:16
> To: [EMAIL PROTECTED]
> Subject: [iText-questions] itext sample for tiff(G3) to pdf
>
> Hi
>
> I am using itext to convert tiff to pdf files.
> I am using sample (chap0612 ) given by itext. I just changed the
> filename to my tiff file name
> It converts to PDF. When i opened the pdf in acrobat it says "read less
> image data than expected".
> The tiff file has G3 format with COMP_FAX_G3_2D compression.
> Should i do anything more that is not given in the sample to convert
> tiff files of G3 with COMP_FAX_G3_2D
>
> Thank you
> regards
> Mathi
>
>
>
>
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