Bug 48027

Summary:	Regression with cairo 1.12.0 in Webkit/GTK based browser
Product:	cairo	Reporter:	Sebastian Dröge (slomo) <slomo>
Component:	xlib backend	Assignee:	Carl Worth <cworth>
Status:	RESOLVED MOVED	QA Contact:	cairo-bugs mailing list <cairo-bugs>
Severity:	normal
Priority:	medium
Version:	1.12.0
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:

Description Sebastian Dröge (slomo) 2012-03-29 01:13:57 UTC

Can be easily reproduced by loading the following page with a Webkit/GTK based browser with cairo 1.10 and cairo 1.12:
http://demo.redmine.org/projects/qs/issues/gantt

The red, empty squares (with cairo 1.12) are meant to be filled with a red/white 1*1px checkerboard pattern... and actually are with cairo 1.10.

Might be related to bug #47266 , maybe not

Comment 1 Sebastian Dröge (slomo) 2012-03-31 00:59:34 UTC

As discussed on IRC this is most likely a bug in the xlib backend as it doesn't happen with WebKit2 (which uses the image backend).

Also:
<ickle>	the squares are filled in at first, and in the traces.
<ickle>	also missing the squiggly horizontal line

Comment 2 Chris Wilson 2012-04-30 12:44:16 UTC

The original demo is now no longer accessible, and I haven't found an alternative gantt chart that is meant to have the checkboard pattern. Lots have the blank space where the squiggle should be, but I'm sure if that is even meant to be displayed or not.

Do you have a new URL that demonstrates the issue?

Comment 3 Sebastian Dröge (slomo) 2012-05-01 01:01:51 UTC

http://demo.redmine.org/projects/gsdemoproject/issues/gantt?set_filter=1&f%5B%5D=status_id&op%5Bstatus_id%5D=o&f%5B%5D=&months=6&month=3&year=2012&zoom=2

This one for example. There should be a dotted line between the two blue rhombus and the red and green box for the two bugs should have a dotted filling too.

Comment 4 Chris Wilson 2012-05-01 09:27:31 UTC

It doesn't seem to be caused by changes in the image backend. Forcing it to use the original compositor doesn't fix the missing graphics. A similar story when forcing cairo-xlib to use fallbacks, still the graphics are not drawn. I suspect this problem is not internal to cairo.

Comment 5 GitLab Migration User 2018-08-25 13:47:43 UTC

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