ui: simplify gl unblock & flush

GraphicHw.gl_flushed was introduced to notify the
device (vhost-user-gpu) that the GL resources (the display scanout) are
no longer needed.

It was decoupled from QEMU own gl-blocking mechanism, but that
difference isn't helping. Instead, we can reuse QEMU gl-blocking and
notify virtio_gpu_gl_flushed() when unblocking (to unlock
vhost-user-gpu).

An extra block/unblock is added arount dpy_gl_update() so existing
backends that don't block will have the flush event handled. It will
also help when there are no backends associated.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>

1 files changed, 0 insertions, 1 deletions

diff --git a/ui/gtk.c b/ui/gtk.c
index 25896023ff..077d38145d 100644
--- a/ui/gtk.c
+++ b/ui/gtk.c
@@ -593,7 +593,6 @@ void gd_hw_gl_flushed(void *vcon)
     close(dmabuf->fence_fd);
     dmabuf->fence_fd = -1;
     graphic_hw_gl_block(vc->gfx.dcl.con, false);
-    graphic_hw_gl_flushed(vc->gfx.dcl.con);
 }
 
 /** DisplayState Callbacks (opengl version) **/