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  1. JDK
  2. JDK-8235627

Blank stages when running JavaFX app in a macOS virtual machine

    Details

    • Type: Bug
    • Status: Resolved
    • Priority: P4
    • Resolution: Fixed
    • Affects Version/s: openjfx13
    • Fix Version/s: openjfx14
    • Component/s: javafx
    • Labels:
    • Subcomponent:
    • CPU:
      x86
    • OS:
      os_x

      Backports

        Description

        ADDITIONAL SYSTEM INFORMATION :
        guest OS: macOS 10.15
        host OS: Windows 10
        Hypervisors: - VMWare Player 15.5
                            - VirtualBox 6.0

        A DESCRIPTION OF THE PROBLEM :
        When running a JavaFX application in macOS guest VM, the main stage is completely blank, with the following errors: CGLChoosePixelFormat error: 10002, CGLCreateContext error: 10002
        This behavior was observed with a macOS 10.15 guest OS on both VMWare player and VirtualBox, on a Windows 10 host.

        This is an old issue that has already been reported several times (notably as JDK-8154852) but is claimed to have been fixed by JDK-8154148.
        However the fix provided by JDK-8154148 is incomplete; while it does fix a JVM crash, it doesn't prevent an incorrect pixel format to be retrieved, which is the root cause for the stage being empty.

        The problematic code is located at #96 in GlassView3D.m:

        095: CGLError err = CGLChoosePixelFormat(attributes, &pix, &npix);
        096: if ((err == kCGLNoError) && (npix == 0))
        097: {
        098: const CGLPixelFormatAttribute attributes2[] =
        099: {
        100: kCGLPFAAllowOfflineRenderers,
        101: (CGLPixelFormatAttribute)0
        102: };
        103: err = CGLChoosePixelFormat(attributes2, &pix, &npix);
        104: }


        In a comment in JDK-8154148, the following claim is made: "[...] an error happens is when something bad or invalid has occurred. An unsatisfied pixel format request is indicated by npix is 0 and pix is NULL. Hence I feel it is a cleaner and clearer logic to request a different format when npix is 0 and err is kCGLNoError." (https://bugs.openjdk.java.net/browse/JDK-8154148?focusedCommentId=13980465&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-13980465)

        From what I could observe, this is not necessarily true; in this case where a pixel format satisfying the initial conditions could not be found, the return code is kCGLBadPixelFormat (10002); which means we don't try to get a pixel format with less restrictive condition.
        This suggests that a better condition for the second call to CGLChoosePixelFormat (line #103) should be "if (pix == NULL)" instead of "if ((err == kCGLNoError) && (npix == 0))"
        This is further supported by a sample in Apple developer's documentation on how to choose a pixel format: https://developer.apple.com/library/archive/documentation/GraphicsImaging/Conceptual/OpenGL-MacProgGuide/opengl_pixelformats/opengl_pixelformats.html



        FREQUENCY : always


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                • Assignee:
                  kcr Kevin Rushforth
                  Reporter:
                  webbuggrp Webbug Group
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                  • Created:
                    Updated:
                    Resolved: