Mark Hall wrote:
> On Friday 11 May 2007, Thomas Bickel wrote:
>> I need to add some images to a rtf document, some of those images can be
>> quite large so I added some code that is supposed to scale down images that
>> are larger than a page. The problem is that some images that would fit on a
>> page actually get enlarged with the following code:
> I can't see any obvious errors, I'll have a look where the problem lies over
> the weekend.
>
> Which version of iText are you using and what program are you using to view
> the RTF file?
iText 2.0.2, Word 2003, OO 2.2 Writer
It looks like the rtf image resolution is 33% higher than the iText page
resolution. I.e. I can add images up to approx 697 pixels wide to a rtf (A4)
without having to scale. 96 vs 72 dpi maybe?
Taking that into account I changed my code to this:
if((itImg.width() > docWidth*1.33f) || (itImg.height() > docHeight*1.33f)) {
itImg.scaleToFit(docWidth, docHeight);
}
This does what I intended to do but was confusing at first because as you can
see I do not pass the adjusted sizes to the scaleToFit() method so
plainWidth/Height are still in "page units". So why is the scaled size still
always correct?
It turns out that the twips value you use to write the scaled sizes just
cancels out the error introduced in the scaleToFit() method so the images show
up scaled to full page width.
i.e. the twips value is 33% to hight and should be 15 and not 20 IMHO. (found
out through trial and error by manually editing a rtf).
Regards,
Thomas
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