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List:       openjdk-openjfx-dev
Subject:    WebView + Youtube = NullPointerException
From:       Tobias Bley <tobi () ultramixer ! com>
Date:       2015-10-12 7:26:16
Message-ID: 7E1601DB-1159-4F41-A223-97CE1F4D24FE () ultramixer ! com
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Hi,

we tried to replace our in house Java based browser rapper (Webkit on Mac, \
InternetExplorer on Windows) with WebView. But that's currently not possible because \
of NullPointerException and graphic errors (texture failures).

Here is a simple test case: \
https://github.com/UltraMixer/JavaFXPerformanceTest/blob/master/src/main/java/com/ultramixer/javafxperformancetest/WebViewYoutubeTest.java


The test class loads a video in youtube.com and resizes the window periodically. \
After just a few seconds WebView is thrown NullPointerExceptions and shows up render \
issues….

Outstanding resource locks detected:
ES2 Vram Pool: 536.788.704 used (100,0%), 536.870.912 target (100,0%), 536.870.912 \
max 46 total resources being managed
average resource age is 0,1 frames
0 resources at maximum supported age (0,0%)
41 resources marked permanent (89,1%)
3 resources have had mismatched locks (6,5%)
3 resources locked (6,5%)
42 resources contain interesting data (91,3%)
0 resources disappeared (0,0%)

java.lang.NullPointerException
	at com.sun.javafx.webkit.prism.WCPageBackBufferImpl.validate(WCPageBackBufferImpl.java:115)
  at com.sun.webkit.WebPage.paint(WebPage.java:644)
	at com.sun.javafx.sg.prism.web.NGWebView.renderContent(NGWebView.java:96)
	at com.sun.javafx.sg.prism.NGNode.doRender(NGNode.java:2053)
	at com.sun.javafx.sg.prism.NGNode.render(NGNode.java:1945)
	at com.sun.javafx.tk.quantum.ViewPainter.doPaint(ViewPainter.java:474)
	at com.sun.javafx.tk.quantum.ViewPainter.paintImpl(ViewPainter.java:327)
	at com.sun.javafx.tk.quantum.PresentingPainter.run(PresentingPainter.java:91)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
	at com.sun.javafx.tk.RenderJob.run(RenderJob.java:58)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at com.sun.javafx.tk.quantum.QuantumRenderer$PipelineRunnable.run(QuantumRenderer.java:125)
  at java.lang.Thread.run(Thread.java:745)


Tested with: Java 1.8.0_60 and 1.8.0_66 on Mac OS X 10.11 (MacBookPro Retina)

Best regards,
Tobi


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