[Scribus] Strange behaviour when line has no width but colour white on dark background in PDF

Gregory Pittman gpittman
Wed Aug 1 15:19:09 CEST 2007

Julian Robbins wrote:
> Hi
> This one caught us out a few days ago.
> If you have an image with a zero size line width but set with a white 
> colour line on top on a darker larger background, you see (correctly) no 
> line around the image.
> But when you export to PDF, Acrobat Reader 7 and 8 on Windows and Linux 
> show the image with a white line around it. Evince (on Ubuntu 7.04) 
> interestingly shows no line around the image.
> Is this a Acrobat bug, or an PDF export bug? I would expect that if you 
> force the line to have a 0 mm width it really shouldn't show up. 
> Obviously if we set the line on the image to have line colour 'none' it 
> would fix this, but why do we have to ? When you zoom in to the image at 
> 6400% the line is still thin, but even at 66% view the line is still 
> seen ...
So what you're saying is that you insist that you make a line disappear 
by making its width zero rather than making its color None. One of the 
things to consider is that with floating point numbers, zero can be a 
difficult thing to achieve. If you can go to the bother of making a line 
width zero, how much more work is making the color None?


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