Re: [tex-implementors] Ugly rules in PDF
In a message dated 5/18/05 12:51:05 AM, taco@elvenkind.com writes:
Not this one, apparently (pdftex already outputs stroked lines).
Interesting. I'd not noticed that. There's some interesting discussion of it in comp.text.tex ~1999, w/ one of the observations being that using stroked lines improves 300dpi output. FWIW, if one turns on ``Smooth line art'' in Adobe Acrobat 5 (probably 6 and 7 too) there's not that much difference in the appearance of the rendering of the square root rule / character in Hans' example file (which is hinted at in the afore-mentioned discussion, and noted by Hans in a post on the ConTeXt list as making this matter worth re-examination). At some magnifications things are about identical, at others one gets a double-pixel medium grey line, and the other gets a single-pixel dark grey line. Hopefully at some point in time we'll just get high-resolution displays everywhere and this sort of thing will cease to be an issue. Isn't there a Unicode slot for fraction bar (I know the Mac encoding has a slot for fraction slash)? How is this handled in the soon-to-be-released stix fonts? (http://www.stixfonts.org) William
WillAdams@aol.com wrote:
re-examination). At some magnifications things are about identical, at others one gets a double-pixel medium grey line, and the other gets a single-pixel dark grey line. Hopefully at some point in time we'll just
ah, thanks for confirming that, because i noticed something like that here too of course we can complain a lot about the rendering, but on low res screens it's a tricky issue and on average the pdf files look ok; around acrobat 3, ghostscript did the best rendering (esp graphics due to anti aliasing), but nowadays acrobat does a better job; one thing i noticed is that on a high res screen rounding can be multiple pixels off (the cover page of the 'extreme' manual on our web site is a good demonstration); when i submitted a screen dump (1600x1200) to the beta group of adobe a few versions back, they told met that that it didn;t happen at their site; maybe the developers only use low res screens -) (btw, having too big rules is not that unfamiliar to me since we started using tex on 150 dpi printers and at that time everything tex looked bold; when we gto high res printers at frst i thought that there was something wrong with the now thinner results) Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com | www.pragma-pod.nl -----------------------------------------------------------------
Hans
one thing i noticed is that on a high res screen rounding can be multiple pixels off (the cover page of the 'extreme' manual on our web site is a good demonstration);
That sounds as if the pdf renderer does not know the exact resolution it is targeting; thus perhaps it assumes `for screen' == `<150dpi' so tries to optimise for that. chris
participants (3)
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Chris Rowley
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Hans Hagen
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WillAdams@aol.com