Bug 64639

Summary:

Too much repainting when scrolling with fixed position element

Product:

WebKit

Reporter:

Julien Chaffraix <jchaffraix>

Component:

Layout and Rendering

Assignee:

Nobody <webkit-unassigned>

Status:

NEW

Severity:

Normal

CC:

simon.fraser

Priority:

Keywords:

HasReduction

Version:

528+ (Nightly build)

Hardware:

All

OS:

All

Attachments:

Description	Flags
Paint test case - show case the behavior	none
Generated PNG output on Chromium-linux	none

Julien Chaffraix

Reported 2011-07-15 16:41:23 PDT

When scrolling on a page with a fixed position element, it looks like we repaint the whole screen. I guess this can be improved. The test case is similar to LayoutTests/repaint/fixed.html so it may be related to bug 25269.

Attachments
Paint test case - show case the behavior (897 bytes, text/html) 2011-07-15 16:43 PDT, Julien Chaffraix	no flags	Details
Generated PNG output on Chromium-linux (5.52 KB, image/png) 2011-07-15 16:45 PDT, Julien Chaffraix	no flags	Details
View All Add attachment proposed patch, testcase, etc.

Julien Chaffraix

Comment 1 2011-07-15 16:43:26 PDT

Created attachment 101069 [details] Paint test case - show case the behavior

Julien Chaffraix

Comment 2 2011-07-15 16:45:05 PDT

Created attachment 101070 [details] Generated PNG output on Chromium-linux

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