[cairo-bugs] [Bug 24240] PDF backend seems to rasterize when drawing to group

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Thu Oct 1 09:31:24 PDT 2009


--- Comment #3 from Ken Treis <ken at miriamtech.com>  2009-10-01 09:31:21 PST ---
Created an attachment (id=29980)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=29980)
Screenshot of preview showing 1.9.3 output

(In reply to comment #2)
> There have been some changes in the current git version in the way groups are
> written to PDFs. Cairo now avoids using PDF Patterns (which are really only
> intended for repeating patterns) for sources with CAIRO_EXTEND_NONE. This makes
> it easier for PDF viewers to render. One of the benefits is text in groups is
> now selectable.

Nice -- this definitely sounds like a step in the right direction.

> Try this version and see if it works with Preview.

I can select the text that was grouped, but curiously Preview still doesn't
render it with sub-pixel smoothing. It may well be a bug in Preview, since
Adobe Reader doesn't show the apparent issue on the 1.8.8 output, either
on-screen (it always uses antialiasing anyway) or in print (preview's print
output is "blurry", where Adobe's is clean).

Also, the leading "A" on "Arial" doesn't show up in Preview (see attached
screenshot). It shows up in Adobe Reader on-screen but not when printed -- in
fact, after printing, Adobe Reader shows the following:

> An error exists on this page. Acrobat may not display the page correctly.
> Please contact the person who created the PDF document to correct the problem.

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