Add new spice-gl stubs API

- spice_qxl_gl_scanout() to take the current scanout

- spice_qxl_gl_draw_async() to draw the scanout, is like other Spice async
  functions, it takes a cookie and will return in the
  QXLInterface.async_complete()

Two new fields are also added to QXLState, in order to save the current
scanout, and the pending async.

A scanout can't be updated if there are pending draw atm. Discarding
outdated draws is left as a future improvement to allow updating the
scanout without waiting for draw async to be done.

Signed-off-by: Marc-André Lureau <marcandre.lureau@gmail.com>
[make QXL function names more coherent - Frediano Ziglio]
Signed-off-by: Frediano Ziglio <fziglio@redhat.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/server/reds.h b/server/reds.h
index 8ff4491b..3182382d 100644
--- a/server/reds.h
+++ b/server/reds.h
@@ -36,6 +36,8 @@ extern RedsState *reds;
 struct QXLState {
     QXLInterface          *qif;
     struct RedDispatcher  *dispatcher;
+    SpiceMsgDisplayGlScanoutUnix scanout;
+    struct AsyncCommand *gl_draw_async;
 };
 
 struct TunnelWorker;