[webkit] [9] Review request for 8170450: Crash while loading wordpress.com in HiDPI / Retina display

[Arunprasad Rajkumar]

Hello Kevin, Guru, Murali,

Please review the fix for JDK-8170450 <https://bugs.openjdk.java.net/browse/JDK-8170450>.

Analysis: While applying a filter, WebCore get's ImageData from ImageDataJava using getPremultipliedImageData method. Our current implementation doesn't considers resolutionScale/pixelScale while returning the data, due to this, unscaled image data is returned to WebCore which leads to crash while accessing. 

Solution: Similar other WebKit implementations(Apple, GTK), we must scale the given rectangle according the resolutionScale. 

Fix: http://cr.openjdk.java.net/~arajkumar/8170450/webrev

[1] https://wordpress.com/start/design-type-with-store <https://wordpress.com/start/design-type-with-store>

Thanks,
Arun