Image transparency issues related to printing PDF

[porcupine <java (at) konnaris.com>]

Have you tried setting the PdfVersion? eg (java):

writer.setPdfVersion(PdfWriter.VERSION_1_3);

set this before you do document.open();



Jerold Sampson wrote:
> 
> I am having problems printing PDF generated with iText.  The PDF views
> correctly with the Adobe reader but must be printed using
> PostScript Level 3 or as image.  The default printing modes result in
> image transparency issues, i.e. overlapping images obscure each
> other.  I have treid many different permutations but can not seem to get
> around the problem.  I am attaching a sample PDF file
> stripped down to the offending page content.  It views fine but prints
> incorrectly unless it is printed as image or
> PostScript Level 3.
> 
> I am nor clear on how to set the transparency mask and have been using
> more or less a trial and error method! . . . not my preferred
> mode of operation. My lack of understanding on how this parameter is
> constructed and what it does may be the source of my problems.
> The following code snippets are used to add the images to the page:
> 
>    if (gray) {
>           // 8-bit logic (0 black 255 white/transparent)
> 
>           int transparency[] = {255, 255};
>           pdfImage =
> com.lowagie.text.Image.getInstance(xSize,ySize,1,8,data,transparency);
>           }
> 
> the above views correctly and prints fine to non-PostScript devices . .
> . However when printing to PostScript Level 2  it fails. (I use CutePDF
> driver to test this)
> 
> else {
>           // 1-bit logic (0 black 1 white/transparent)
>           //int transparency[] = {1, 1}; // does not work ??? (does not
> view or print correctly)
>           int transparency[] = {255, 255}; // views but must print as
> image
>           pdfImage = new com.lowagie.text.ImgRaw(xSize,ySize,1,1,data);
>           pdfImage.setTransparency(transparency);
>           }
> 
> The above views correctly but must be printed as image or PostScript
> Level 3.  The transparency[] = {1,1; does not work as it should.
> 
> I am attaching two 1 page PDFs.  One is a bi-level image the other is
> 8-bit.
> 
> This may be an Adobe reader issue but I would like to make sure there is
> not something
> else lurking around this problem!
> 
> Thanks.
> 
> Sincerely
> Jerold Sampson
> 
> 
> 
> 
> 
>  
> 

-- 
View this message in context: http://www.nabble.com/Image-transparency-issues-related-to-printing-PDF-tf2596873.html#a7252789
Sent from the iText - General mailing list archive at Nabble.com.


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