The problem is that you are doing two calculations with the pdf and by
default iText doesn't have that kind of precision by default. Call
ByteBuffer.HIGH_PRECISION=true.
Paulo
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On
> Behalf Of Andrew Bligh
> Sent: Thursday, April 17, 2008 11:04 AM
> To: Post all your questions about iText here
> Subject: Re: [iText-questions] Image extracted from PDF file
> and scaledis slightly bigger than expected.
>
> Hi Paulo,
>
> Thanks for your quick response. I've attached atest program
> if you would like to take a look. If you rename the file to a
> .zip extension andextract theit to the root of your C: drive
> (I hope your using awindows machine). Then from the command line run:
>
> java -cp PATH_TO_JRE_LIB_FOLDER;PATH_TO_ITEXT_JAR; PdfGeneration
>
> Two PDF files will be produced to the C:\test_app directory:
>
> - testPdf.pdf
> - testJpg.pdf
>
> I haveincluded these files for quick viewing. You will need
> to zoom right into see the container borders. You will notice
> the jpg image source file(yellow square) is exact but the pdf
> image source file(green sqaure) isout to the top and left. I
> can see where your idea that the documentsizes as Integers
> could be a problem but I would have thought the scaleabsolute
> method would neutralise this? Can I also mention that
> sometimesthe pdf image sources are smaller to the top and
> left of the containerby about the same amount as they are
> over in this example?
>
> Thanks & regards,
>
> Andrew
>
> > Date: Wed, 16 Apr 2008 17:35:17 +0100
> > From: [EMAIL PROTECTED]
> > To: [email protected]
> > Subject: Re: [iText-questions] Image extracted from PDF
> file and scaled is slightly bigger than expected.
> >
> > The page dimensions are usually integers and that limits
> the precision
> > to 0.35 mm. Without being able to reproduce the problem
> that's all I can
> > guess.
> >
> > Paulo
> >
> > > -----Original Message-----
> > > From: [EMAIL PROTECTED]
> > > [mailto:[EMAIL PROTECTED] On
> > > Behalf Of Andrew Bligh
> > > Sent: Wednesday, April 16, 2008 4:48 PM
> > > To: [email protected]
> > > Subject: [iText-questions] Image extracted from PDF file and
> > > scaled is slightly bigger than expected.
> > >
> > > Hi,
> > >
> > > I am drawing a 'container' as a rectangle with line thickness
> > > 0.1f wthin a pdf and then scaling an image to fit the
> > > container exactly (origian bottom left corner). If the image
> > > source is a jpeg or gif the fit is exact i.e. you can
> > > slightly see the contianer lines all the way around the
> > > image. If the image source is a PDf file and I extract the
> > > image from the first page like so:
> > >
> > > PdfReader reader = new PdfReader(
> > > location ) ;
> > > PdfImportedPage page =
> > > writer.getImportedPage( reader, 1 ) ;
> > > image = Image.getInstance( page ) ;
> > >
> > > then the image slightly overlaps the container to the right
> > > and top. The bottom and left sides of the container are ok
> > > but the image seems to be slightly taller and wider than
> > > expected. We are only talking about 0.2 of a mm here but this
> > > accuracy is vital to my application.
> > >
> > > Is this a known issue or am I doing something wrong?
> > >
> > > Thanks in advance,
> > >
> > > Andrew
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