Bug 133704

Summary:	[Win] Port Mac Tiled Drawing Logic to Windows
Product:	WebKit	Reporter:	Brent Fulgham <bfulgham>
Component:	Layout and Rendering	Assignee:	Brent Fulgham <bfulgham>
Status:	RESOLVED FIXED
Severity:	Normal	CC:	bfulgham, webkit.review.bot
Priority:	P2
Version:	528+ (Nightly build)
Hardware:	PC
OS:	All
Bug Depends on:	133819, 133862, 133895
Bug Blocks:

Description Brent Fulgham 2014-06-10 15:47:29 PDT

Certain markup can cause the Windows tiled drawing logic to waste resources laying out and rendering off-screen rectangle. This can be triggered if a DOM element has a style with a very large negative (e.g., -100,000) 'left' property.

Our Mac code is much smarter about this kind of thing, and excludes rects that are not visible.

We should do the same on Windows.

Comment 1 Brent Fulgham 2016-03-22 13:34:27 PDT

This has been complete for some time.