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opengl: add egl-headless display

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Add egl-headless user interface.  It doesn't provide a real user
interface, it only provides opengl support using drm render nodes.
It will copy back the bits rendered by the guest using virgl back
to a DisplaySurface and kick the usual display update code paths,
so spice and vnc and screendump can pick it up.

Use it this way:
  qemu -display egl-headless -vnc $display
  qemu -display egl-headless -spice gl=off,$args

Note that you should prefer native spice opengl support (-spice
gl=on) if possible because that delivers better performance.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-id: 20170505104101.30589-7-kraxel@redhat.com
This commit is contained in:
Gerd Hoffmann 2017-05-05 12:41:01 +02:00
parent bc8c946f72
commit bb1599b64c
4 changed files with 178 additions and 0 deletions
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3
include/ui/console.h
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@ -527,4 +527,7 @@ static inline void early_gtk_display_init(int opengl)
}
#endif
/* egl-headless.c */
void egl_headless_init(void);
#endif