Red Hat Bugzilla – Full Text Bug Listing
|Summary:||corrupt glyph positions with large font|
|Product:||[Fedora] Fedora||Reporter:||Caolan McNamara <caolanm>|
|Component:||cairo||Assignee:||Behdad Esfahbod <behdad>|
|Status:||CLOSED RAWHIDE||QA Contact:||Fedora Extras Quality Assurance <extras-qa>|
|Fixed In Version:||Doc Type:||Bug Fix|
|Doc Text:||Story Points:||---|
|Last Closed:||2008-08-23 23:47:10 EDT||Type:||---|
|oVirt Team:||---||RHEL 7.3 requirements from Atomic Host:|
Description Caolan McNamara 2008-05-23 10:11:48 EDT
Attached is a test-case boiled out of OpenOffice.org and bolted onto the xlib cairo-demo. It attempt to render the string MoWoW and the string MWooW with a very large Liberation Serif font. And the screenshot shows the results. Unless I'm being very slow today (always possible) there is something terribly screwed up going on. cairo-1.6.4-1.fc9.i386 I see this both with a i810 driver and a nv driver.
Comment 3 Carl Worth 2008-05-23 10:54:06 EDT
I've replicated this bug with the r100 driver as well. So it appears to be a fairly generic cairo-xlib or X server bug. Note that the bug does not appear when rendering to a cairo image surface. Also, the bug is present with at least both of "Liberation Sans" and "Bitstream Vera Sans". -Carl
Comment 4 Carl Worth 2008-05-23 11:06:33 EDT
I've also added a new large-font test to cairo's test suite to exercise this bug. It also verifies that all backends other than cairo-xlib pass the test. -Carl
Comment 5 Behdad Esfahbod 2008-05-23 13:58:43 EDT
Isn't this the bug reported here: http://lists.cairographics.org/archives/cairo/2008-May/014033.html
Comment 6 Carl Worth 2008-05-23 15:17:53 EDT
(In reply to comment #5) > Isn't this the bug reported here: > http://lists.cairographics.org/archives/cairo/2008-May/014033.html Could be. I hadn't done any analysis of that one, so hadn't remembered it. No fix yet? Behdad, does Vlad's suggestion sound right? I'm still looking close to try to understand this one myself. Where is the glyph data getting shuffled for example? -Carl
Comment 7 Behdad Esfahbod 2008-05-23 16:25:57 EDT
Vlad's fix doesn't work: http://lists.cairographics.org/archives/cairo/2008-May/014044.html I'll fix this today, perhaps using what I suggest in the above URL.
Comment 8 Behdad Esfahbod 2008-05-23 20:19:53 EDT
I've pushed a couple fixes to cairo master now. Please test.
Comment 9 Caolan McNamara 2008-05-24 09:02:05 EDT
Yes latest git version works just right for me
Comment 10 Matthias Clasen 2008-08-23 23:47:10 EDT
That probably means we can close this bug now, with cairo 1.7.4 in rawhide.