[Webkit-unassigned] [Bug 66382] LayerTilerChromium: Grow layers with tile granularity

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=66382





--- Comment #6 from Sami Kyostila <skyostil at google.com>  2011-08-17 13:00:21 PST ---
I added some logging to WebCore::LayerTilerChromium::prepareToUpdate to track paint events. Navigating to http://bbc.co.uk with a 1280x664 window I see both large paints events covering the whole viewport (x:0, y:0, w:1280, h:664) as well as smaller rects inside the viewport as the page elements load.

Scrolling the page down slowly, I then see these kinds of events:

 - (0, 0, 1280, 664)
 - (0, 2, 1280, 666)
 - (0, 4, 1280, 668)
 - (0, 6, 1280, 670)
 - etc.

These rects get passed to growLayerToContain(), so the layer grows with pixel granularity rather than tile granularity.

-- 
Configure bugmail: https://bugs.webkit.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.