On 23 Sep 2007 at 22:02, Johannes Gebauer wrote:

> The problem with the windows PDF output displayed in Reader is that all
> the lines are different thickness, extremely thick, and the notes are so
> blotchy one can't read them.

Well, that's a horse of a different color.

On every PC I've ever viewed my own PDFs (with Acrobat Reader), 
*some* of the lines are of varying thicknesses, and usually just two 
different thicknesses (1 pixel or 2), and the notes themselves are 
just fine and dandy. I do note that increasing the magnification from 
100% to 200% to 300% to 400% causes different lines to be 
thicker/thinner, but still, there's just two line thicknesses (1 
pixel or 2).

But, again, I cite Acrobat Reader 6, which was able to smooth these 
lines so that the thicknesses did not vary, and did not do it with 
anti-aliasing that resulted in gray lines.

But I've *never* seen blurry noteheads (I have seen a few blurry 
beams, but mostly when the angle was very shallow and the anti-
aliasing had to be spread over a number of horizontal pixels).

There could also be differences on Windows machines depending on 
whether you're using Windows anti-aliasing or the newer ClearType 
(which is designed specifically for LCD screens and shouldn't be used 
with CRTs). While ClearType has major flaws (see 
http://antigrain.com/research/font_rasterization/index.html for a 
detailed look at the problem), it works quite well for getting 
onscreen clarity.

But Acrobat Reader perhaps uses internal methods for this, and maybe 
this is why things look bad on Windows (the basic difference between 
Apple anti-aliasing and MS anti-aliasing is whether you respect the 
font shape/widths or respect the screen grid; if you do the former, 
you get blurry text that is properly proportioned at all sizes and on 
all devices; if you do the latter, the proportions change according 
to the size, because you're adjusting the glyph shape to the pixel 
grid) -- because Windows users are used to seeing a different kind of 
anti-aliasing, or because the two kinds of anti-aliasing cause 
conflicts.

Of course, I don't have a problem with Acrobat Reader's rendering of 
anything but lines, so I'm not sure where the fuzzy notes are coming 
from. I've simply never seen it.

-- 
David W. Fenton                    http://dfenton.com
David Fenton Associates       http://dfenton.com/DFA/


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