Bug 62690 – REGRESSION(78201): Windowless Flash plug-ins are transparent on some sites

• Status: RESOLVED
• Resolution: FIXED
• Component: Plug-ins

[Jon Honeycutt]

Windowless Flash instances that use wmode=transparent paint completely transparent on some sites.

<rdar://problem/9512026>

[Jon Honeycutt]

Created attachment 97248 [details]
Patch

Not sure how to test this. <https://bugs.webkit.org/show_bug.cgi?id=60169> covers adding a test that could also test this fix.

[Darin Adler]

Comment on attachment 97248 [details]
Patch

The EWS server wasn’t able to process the patch because the DrawingAreaImpl.cpp part didn’t apply cleanly. You should post a new patch so EWS can work on it.

[Jon Honeycutt]

Created attachment 97326 [details]
Patch v2

Updated patch that should apply cleanly.

[WebKit Review Bot]

Attachment 97326 [details] did not pass style-queue:

Failed to run "['Tools/Scripts/check-webkit-style', '--diff-files', u'Source/WebKit2/ChangeLog', u'Source/WebKit..." exit_code: 1

Source/WebKit2/WebProcess/WebPage/win/DrawingAreaImplWin.cpp:53:  Local variables should never be PassOwnPtr (see http://webkit.org/coding/RefPtr.html).  [readability/pass_ptr] [5]
Source/WebKit2/WebProcess/WebPage/DrawingAreaImpl.h:35:  Code inside a namespace should not be indented.  [whitespace/indent] [4]
Total errors found: 2 in 9 files


If any of these errors are false positives, please file a bug against check-webkit-style.

[Jon Honeycutt]

Created attachment 97329 [details]
Patch v3

Fix a merge error.

[WebKit Review Bot]

Attachment 97329 [details] did not pass style-queue:

Failed to run "['Tools/Scripts/check-webkit-style', '--diff-files', u'Source/WebKit2/ChangeLog', u'Source/WebKit..." exit_code: 1

Source/WebKit2/WebProcess/WebPage/DrawingAreaImpl.h:35:  Code inside a namespace should not be indented.  [whitespace/indent] [4]
Total errors found: 1 in 9 files


If any of these errors are false positives, please file a bug against check-webkit-style.

[Jon Honeycutt]

Landed in <http://trac.webkit.org/changeset/88978>.

[Adam Roben (:aroben)]

Comment on attachment 97329 [details]
Patch v3

View in context: https://bugs.webkit.org/attachment.cgi?id=97329&action=review

> Source/WebKit2/WebProcess/WebPage/DrawingAreaImpl.h:91
> +    PassOwnPtr<WebCore::GraphicsContext> createGraphicsContext(ShareableBitmap*);

The returned GraphicsContext will go bad on Windows if it outlives the passed-in ShareableBitmap, but this is not made clear to the caller.

[Adam Roben (:aroben)]

This fix caused bug 63075.

[Adam Roben (:aroben)]

Some sites that showed this bug:

http://www.tiffany.com/Shopping/CategoryBrowse.aspx?mcat=148204&cid=287464&search_params=s+5-p+1-c+287464-r+101323341-x+-n+12-ri+-ni+1-t+

megaupload.com (login and register buttons)