Zack Weinberg wrote:
Have you looked at my test cases? Do you agree that those are rendered better without interpolation?
Yes, and you have described them very well. Rendering them with interpolation produces clearly wrong results. However, questions stand 1) whether representing such sets of rectangles with low-resolution bitmaps is valid according to the PostScript and PDF specifications (hint: importing this into CorelDraw under Windows gives a warning about a low-resolution bitmap), and 2) if the standard does allow interpolation in this case, how widespread is this assumption of non-interpolated rendering in (broken) software that creates such files.
In either case, your "don't interpolate on upscaling" heuristic looks good enough in theory, but is not currently implementable in practice for PostScript files processed via Ghostscript (because there is no such command line option for Evince to pass to Ghostscript). And that's a bug in Ghostscript.
-- Alexander E. Patrakov -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
