Bug 26206

Summary: Odd rendering of large canvases
Product: WebKit Reporter: Sam Weinig <sam>
Component: CanvasAssignee: Nobody <webkit-unassigned>
Status: RESOLVED WORKSFORME    
Severity: Normal CC: guanqun.lu, mdelaney7, simon.fraser
Priority: P2    
Version: 528+ (Nightly build)   
Hardware: Mac   
OS: OS X 10.5   
Attachments:
Description Flags
test case none

Sam Weinig
Reported 2009-06-04 22:11:49 PDT
When plotting a large graph with canvas (150,000 pixel wide), the canvas disapears after about 30,000 pixels and then reappears if you scroll further (potentially repeating itself, though I can't quite tell).
Attachments
test case (488 bytes, text/html)
2009-06-04 22:12 PDT, Sam Weinig 		no flags
Details
View All Add attachment proposed patch, testcase, etc.
Sam Weinig
Comment 1 2009-06-04 22:12:20 PDT
Created attachment 30992 [details] test case Test case with random data.
Simon Fraser (smfr)
Comment 2 2009-06-04 22:18:58 PDT
32-bit overflow?
Matthew Delaney
Comment 3 2010-07-26 23:24:58 PDT
Sam, do you mean that if one scrolls slowly, after about 30k pixels the canvas won't be drawn for a chunk until you scroll enough and then it all comes in at once as if triggered by going far enough? I've been playing around with the testcase example and can't reproduce on my 15" MBP. Perhaps this is no longer an issue. Could you check on your machine?
Matthew Delaney
Comment 4 2010-09-23 12:07:16 PDT
ping?
Alexey Proskuryakov
Comment 5 2012-03-02 14:18:01 PST
I also cannot reproduce, and given that we haven't received a response since 2010, resolving as WORKSFORME.
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