[gs-bugs] [Bug 690184] Table in PDF rendered black or with horizontal lines at higher resolutions

[bugs.ghostscript.com-bugzilla-daemon at ghostscript.com]

http://bugs.ghostscript.com/show_bug.cgi?id=690184





------- Additional Comments From ray.johnston at artifex.com  2008-11-27 09:56 -------
Note that this file appears to have been created for 600 dpi, since at that
scaling, the image size is (almost) one image pixel per device dot.

This file converts correctly at resolutions slightly off from 600 and 300 dpi
such as 600.22 -> 600.29 and 300.12 -> 300.15

This file is clearly very resolution sensitive. Note that with Adobe Acrobat
Reader 7, turning on "Edit" / "Preferences" / "Smooth line art" will result in
output like Ghostscript -- black lines at some scale factors and all black
at 90% scale factor. Without 'smooth line art', AR7 displays without black
lines up to about 615%, then the lines start appearing.

I'm wondering what 'fill' and 'image' scan conversion Adobe is doing when
'smooth line art' is off, and whether Ghostscript can emulate it.






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