Bug 84286

Summary:	clip-polygons.xcb-render-0_0.argb32 failure
Product:	cairo	Reporter:	Massimo <sixtysix>
Component:	xcb backend	Assignee:	Uli Schlachter <psychon>
Status:	RESOLVED MOVED	QA Contact:	cairo-bugs mailing list <cairo-bugs>
Severity:	normal
Priority:	medium
Version:	unspecified
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:
Attachments:	quick hack

Description Massimo 2014-09-24 15:13:16 UTC

Created attachment 106795 [details]
quick hack

The problem is that the clip contains multiple self-intersecting paths,
in that case _cairo_clip_combine_with_surface (src/cairo-clip-surface.c:78)
uses each path separately with a fill (OPERATOR_IN), for each pixel on the
contour of more than one path that results in a different pixel coverage
than filling once with the path intersection of all paths.

In get_clip_surface (src/cairo-xcb-surface-render.c:1698) using a temoporary
clear image surface and painting in white (OPERATOR_ADD) to perform the
clip fixes

clip-polygons.xcb-render-0_0.argb32
clip-group-shapes-circles.xcb-render-0_0 .argb32 and .rgb24

Comment 1 GitLab Migration User 2018-08-25 13:43:19 UTC

-- GitLab Migration Automatic Message --

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