GNOME Bugzilla – Bug 507400
inappropriate smoothing of bitmap images scaled way up
Last modified: 2008-01-13 11:30:17 UTC
[ Forwarded from http://bugs.debian.org/454550 by Zack Weinberg ] The attached PDF and EPS files are a rendering as a grayscale bitmap (plus some text) of a 10x10 matrix. Each bit in the matrix is intended to produce a gray square with crisp edges; this is how ghostscript renders it, and how every printer I've tried renders the original EPS file. evince, however, applies some kind of smoothing operation to the scaled bitmap, rendering it completely illegible. It does this to both the PDF and the EPS versions. This appears to be intentional - at least, I see that when evince invokes gs to render the EPS file, it is deliberately passing -dDOINTERPOLATE, which produces this behavior if I run gs by hand - but I beileve it to be wrong, because it is inconsistent with the behavior of printers and the behavior of other PostScript/PDF renderers.
Created attachment 102192 [details] PDF file showing the issue
Created attachment 102193 [details] EPS file showing the issue
Thanks for taking the time to report this bug. This particular bug has already been reported into our bug tracking system, but we are happy to tell you that the problem has already been fixed. It should be solved in the next software version. You may want to check for a software upgrade. *** This bug has been marked as a duplicate of 445797 ***