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This patch moves initialisation into a new QX11GLSharedContexts
class which is created as a Q_GLOBAL_STATIC. This class owns both
the RGB/ARGB EGL contexts and the QGLContext used for sharing.
Finally, the shared QGLContext is make a valid context wrapping the
RGB EGL context and a small pixmap surface. This makes the shared
QGLContext the QGLContextGroup master, so when it is deleted, it
can be made current to delete the GL resources. Among other benefits,
this patch stops apps seg-faulting when they gracefully quit.
Reviewed-By: TrustMe
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It's better to defer the synchronisation to just before the point it
is actually needed. When used as a window surface, this is in flush
and scroll. If the QX11GLPixmapData is used as the defaut backend
for QPixmaps, it might need to be put back into endPaint. However,
the GL driver will hopefully make sure rendering to the pixmap is
complete before binding it as a texture via texture-from-pixmap.
Also, it's probably better to use eglWaitClient rather than glFinish
for synchronisation as it is potentially slightly more optimal.
Reviewed-By: TrustMe
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This is completely over the top and many of these synchronisation
points should be removed before doing any serious benchmarking.
However, it makes sure any remaining bugs are not due to GPU & CPU
being out of sync.
Reviewed-By: TrustMe
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It's still just as buggy, but at least it allows us to remove a lot
of crud from qgl_x11egl.cpp.
Reviewed-By: TrustMe
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Reviewed-by: Trust Me
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Hash-Define out X11GL pixmap data until the GLX implementation is ready.
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Enable it by setting QT_USE_X11GL_PIXMAPS environment variable while
using the -graphicssystem opengl
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