[iText-questions] how to invert color of tiff using itext
Hello to all...when i convert tiff2pdf i found a little problem, for some
particular tiff (wich have COMP_FAX_G3_2D compression) the result pdf have
color inverted (black to white and white to black).
Is there a way using itext to invert the colors of the image?
my code is:
ByteArrayOutputStream baos = new ByteArrayOutputStream();
Document document = new Document();
PdfWriter writer = PdfWriter.getInstance(document, baos);
try {
int pages = 0;
document.open();
PdfContentByte cb = writer.getDirectContent();
RandomAccessFileOrArray ra = null;
int comps = 0;
ra = new RandomAccessFileOrArray(tiff.getStream());
comps = TiffImage.getNumberOfPages(ra);
for (int c = 0; c comps; ++c) {
Image img = TiffImage.getTiffImage(ra, c + 1);
long h = 0;
long w = 0;
if (img != null) {
Float height = new
Float(img.getScaledHeight());
h = height.longValue();
Float width = new
Float(img.getScaledWidth());
w = width.longValue();
float percent = 100;
int pos = 0;
if (w 895)
percent = ((595 + 18) * 100 /
w);
if (h 842)
pos = (int) (842 - h * percent
/ 100);
else
pos = (int) (842 - h);
img.scalePercent(percent);
img.setAbsolutePosition(0, pos);
document.add(new Paragraph());
cb.addImage(img);
document.newPage();
++pages;
}
}
ra.close();
document.close();
writer.close();
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Re: [iText-questions] tiff2pdf byte Array problem
Ok,
ByteArrayOutputStream baos =new ByteArrayOutputStream();
Document document = new Document();
PdfWriter writer = PdfWriter.getInstance(document,baos);
try {
int pages = 0;
document.open();
PdfContentByte cb = writer.getDirectContent();
RandomAccessFileOrArray ra = null;
int comps = 0;
try {
ra = new
RandomAccessFileOrArray(tiff.getStream());
comps = TiffImage.getNumberOfPages(ra);
for (int c = 0; c comps; ++c) {
try {
Image img =
TiffImage.getTiffImage(ra,c+1);
long h = 0;
long w = 0;
if (img != null) {
Float height = new
Float(img.getScaledHeight());
h = height.longValue();
Float width = new
Float(img.getScaledWidth());
w = width.longValue();
float percent = 100;
int pos = 0;
if (w 895)
percent = ((595 + 18) *
100 / w);
if (h 842)
pos = (int) (842 - h *
percent / 100);
else
pos = (int) (842 - h);
img.scalePercent(percent);
img.setAbsolutePosition(0,pos);
document.add(new Paragraph());
cb.addImage(img);
document.newPage();
++pages;
}
} catch (Throwable e) {
e.printStackTrace();
}
}
} catch (Throwable e) {
e.printStackTrace();
}
FileOutputStream fos= new
FileOutputStream(result.pdf);
fos.write(baos.toByteArraY());
document.close();
}
the code for conversion is the same.
I must use a byte array because i want to return this to another method.
Fabrizio Accatino wrote:
Post the source code where you use ByteArrayOutputStream.
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[iText-questions] tiff2pdf byte Array problem
hello to alli have write a little application that convert a multipage
tiff to a multipage pdf...
OutputStream fout =new FileOutputStream(result.pdf);
Document document = new Document();
PdfWriter writer = PdfWriter.getInstance(document,fout);
try {
int pages = 0;
document.open();
PdfContentByte cb = writer.getDirectContent();
RandomAccessFileOrArray ra = null;
int comps = 0;
try {
ra = new RandomAccessFileOrArray(tiff.getStream());
comps = TiffImage.getNumberOfPages(ra);
for (int c = 0; c comps; ++c) {
try {
Image img = TiffImage.getTiffImage(ra,c+1);
long h = 0;
long w = 0;
if (img != null) {
Float height = new
Float(img.getScaledHeight());
h = height.longValue();
Float width = new
Float(img.getScaledWidth());
w = width.longValue();
float percent = 100;
int pos = 0;
if (w 895)
percent = ((595 + 18) * 100 / w);
if (h 842)
pos = (int) (842 - h * percent / 100);
else
pos = (int) (842 - h);
img.scalePercent(percent);
img.setAbsolutePosition(0,pos);
document.add(new
Paragraph());
cb.addImage(img);
document.newPage();
++pages;
}
cb.getPdfDocument();
} catch (Throwable e) {
e.printStackTrace();
}
}
} catch (Throwable e) {
e.printStackTrace();
}
document.close();
}
this code work fine.
but if i set PdfWriter writer = PdfWriter.getInstance(document,new
ByteArrayOutputStream);
and then i write the content of outputstream on a file the pdf result is
corrupted...
Can anyone help me??
%-|
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