bad scaling of pictures?

[Hadmut Danisch <hadmut danisch de>]

Hi,


(first of all: thanks for evince, pretty good program)


I am currently generating picture slide shows, but don't want to use
Powerpoint or OpenOffice, thus generating PDF slideshows. That's much
more stable, and evince proved to be much less power-hungry than OO,
and smoothly runs even on weak netbooks. :-)


But I found one problem:

I am preparing pictures for a given screen size to fit in exactly
without rescaling, e.g. to fit into a 1024x768 screen. I therefore
generate a PDF document with the same aspect and paste pictures into to
fully expand to either width or height (depending on aspect). 

While in principle evince does what I expect, you'll find little
distortions when comparing the picture with what evince displays 


E.g. compare the details at the car or the cables in to top right
corner at

http://www.danisch.de/tmp/evincetest.pdf
http://www.danisch.de/tmp/evincetest.jpg

you'll find a visible loss of image quality both on larger screens
where both need to be rescaled as on screen with the exact height
of 768 pixels. 

Maybe some rounding problem in the geometry maths?
Maybe a problem of one of the libraries evince makes use of?



regards
Hadmut