Bug 150028

Summary:	Canvas.toDataURL incorrectly raises exception when using Media Source Extensions
Product:	WebKit	Reporter:	Alex <a.nemec>
Component:	Canvas	Assignee:	Nobody <webkit-unassigned>
Status:	RESOLVED CONFIGURATION CHANGED
Severity:	Major	CC:	a.nemec, bfulgham, dino, eric.carlson, jer.noble
Priority:	P4
Version:	Safari 9
Hardware:	All
OS:	All

Description Alex 2015-10-12 05:30:42 PDT

Hi all,

these steps can be followed to reproduce the bug:

1. Create a "video" element, a "canvas" element and its 2d "context".

2. Have the video element's "src" be a "MediaSource" URL (createObjectURL is called for a new MediaSource object).

3. Draw an image with context.drawImage(video, 0, 0);

4. You will not be able to call canvas.toDataURL, because a security exception will be raised (incorrectly).

Alex

Comment 1 Alex 2016-06-08 07:34:50 PDT

Ok,

this bug is now 6 months old and still has the NEW status :). So there is point in reporting the bugs here...

Alex

Comment 2 Alex 2016-06-08 07:36:26 PDT

Should be "no point" of course...

Comment 3 Jer Noble 2016-06-08 11:22:26 PDT

Ve don't yet support painting MSE video into canvas (see bug #125157). This work (ensuring that painting MSE doesn't taint canvases) will take place in that bug.

Comment 4 Brent Fulgham 2022-07-18 14:43:53 PDT

We believe this issue is resolved now that Bug 125157 is shipping. If you believe there is still a problem, please REOPEN this radar with a relevant test case.