[mythtv-commits] Ticket #9505: [CRASH] OpenGL crashes mythtv when closing mythmusic

[MythTV]

#9505: [CRASH] OpenGL crashes mythtv when closing mythmusic
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 Reporter:  qeldroma@…            |          Owner:  paulh
     Type:  Bug Report            |         Status:  assigned
 Priority:  major                 |      Milestone:  unknown
Component:  Plugin - MythMusic    |        Version:  0.24-fixes
 Severity:  medium                |     Resolution:
 Keywords:  mythmusic bug opengl  |  Ticket locked:  0
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Comment (by markk):

 There is no quick fix for this problem.

 Many drivers and platforms will behave erratically if there are multiple
 independent OpenGL contexts in the same thread - notably windows, OS X and
 *nix systems with Intel drivers (and probably proprietary AMD/ATI drivers
 as well).

 For OpenGL video playback, this was solved by using the main UI rendering
 context if it is OpenGL or falling back to creating a new OpenGL rendering
 context otherwise. I would however suggest just dropping any OpenGL
 visualisations if the main UI rendering context is not OpenGL (or D3D).
 OpenGL visualisations then either need to hook directly into
 MythRenderOpenGL painting routines or at the very least make the
 MythRenderOpenGL context current for OpenGL drawing. If the latter, the
 custom OpenGL rendering should probably use OpenGL 2.0 as a minimum to
 ensure compatability with OpenGL ES 2.0.

 This means all existing OpenGL visualisations in MythMusic will need to be
 re-written (see libmythtv/visualisations for some pointers). libvisual
 support should also be dropped (it will never integrate well with
 libmythui and is buggy anyway). The SDL dependency would go away as well.

 MythGallery has the same issues, though I've started looking at moving
 that plugin completely over to libmythui and removing the 'custom' OpenGL
 code there.

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Ticket URL: <http://code.mythtv.org/trac/ticket/9505#comment:3>
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