Bug 14017

Summary:

[CAIRO] Unwanted gradient effect for small stretched images

Product:

WebKit

Reporter:

Alp Toker <alp>

Component:

New Bugs

Assignee:

Nobody <webkit-unassigned>

Status:

RESOLVED FIXED

Severity:

Normal

CC:

gwright

Priority:

Version:

523.x (Safari 3)

Hardware:

All

OS:

All

Attachments:

Description	Flags
Screenshot of the bad rendering	none
Use CAIRO_FILTER_NEAREST to work around the issue	none
Use CAIRO_FILTER_NEAREST to work around the issue, take two	eric: review+

Alp Toker

Reported 2007-06-06 10:50:35 PDT

The unwanted effect is seen at http://news.bbc.co.uk/ A screenshot is attached.

Attachments
Screenshot of the bad rendering (82.50 KB, image/png) 2007-06-06 10:58 PDT, Alp Toker	no flags	Details
Use CAIRO_FILTER_NEAREST to work around the issue (2.18 KB, patch) 2007-06-06 11:12 PDT, Alp Toker	no flags	Details Formatted Diff Diff
Use CAIRO_FILTER_NEAREST to work around the issue, take two (2.18 KB, patch) 2007-06-06 11:14 PDT, Alp Toker	eric: review+	Details Formatted Diff Diff
Show Obsolete (1) View All Add attachment proposed patch, testcase, etc.

Alp Toker

Comment 1 2007-06-06 10:58:16 PDT

Created attachment 14882 [details] Screenshot of the bad rendering

Alp Toker

Comment 2 2007-06-06 11:12:32 PDT

Created attachment 14883 [details] Use CAIRO_FILTER_NEAREST to work around the issue

Alp Toker

Comment 3 2007-06-06 11:14:33 PDT

Created attachment 14884 [details] Use CAIRO_FILTER_NEAREST to work around the issue, take two Updated with tiny a formatting fix in the ChangeLog entry

Eric Seidel (no email)

Comment 4 2007-06-06 11:19:17 PDT

Comment on attachment 14884 [details] Use CAIRO_FILTER_NEAREST to work around the issue, take two Looks sane enough. r=me.

Sam Weinig

Comment 5 2007-06-06 11:25:49 PDT

Landed in r22030.

Alp Toker

Comment 6 2007-06-07 05:08:26 PDT

*** Bug 14016 has been marked as a duplicate of this bug. ***

George Wright

Comment 7 2007-08-29 12:27:59 PDT

Speaking to the cairo people this may not be the optimal solution to this problem. The gradient is a result of the extend method being set to CAIRO_EXTEND_NONE. If you set it to CAIRO_EXTEND_REPEAT or CAIRO_EXTEND_REFLECT the gradient problem goes away, and it allows for better scaling quality using CAIRO_FILTER_GOOD etc.

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