[PATCH v2 12/20] ui: add a DCLOps callback to check dmabuf support

[marcandre.lureau@redhat.com]

From: Marc-André Lureau <marcandre.lureau@redhat.com>

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
---
 include/ui/console.h |  2 ++
 ui/console.c         | 13 +++++++++++++
 2 files changed, 15 insertions(+)

diff --git a/include/ui/console.h b/include/ui/console.h
index 0595aa9953..875885d9c7 100644
--- a/include/ui/console.h
+++ b/include/ui/console.h
@@ -224,6 +224,8 @@ typedef struct DisplayChangeListenerOps {
                                    uint32_t backing_height,
                                    uint32_t x, uint32_t y,
                                    uint32_t w, uint32_t h);
+    /* optional (default to true if has dpy_gl_scanout_dmabuf) */
+    bool (*dpy_has_dmabuf)(DisplayChangeListener *dcl);
     /* optional */
     void (*dpy_gl_scanout_dmabuf)(DisplayChangeListener *dcl,
                                   QemuDmaBuf *dmabuf);
diff --git a/ui/console.c b/ui/console.c
index b5bc3f7699..a645418ada 100644
--- a/ui/console.c
+++ b/ui/console.c
@@ -1463,6 +1463,19 @@ bool console_has_gl(QemuConsole *con)
     return con->gl != NULL;
 }
 
+static bool displaychangelistener_has_dmabuf(DisplayChangeListener *dcl)
+{
+    if (dcl->ops->dpy_has_dmabuf) {
+        return dcl->ops->dpy_has_dmabuf(dcl);
+    }
+
+    if (dcl->ops->dpy_gl_scanout_dmabuf) {
+        return true;
+    }
+
+    return false;
+}
+
 void register_displaychangelistener(DisplayChangeListener *dcl)
 {
     static const char nodev[] =
-- 
2.29.0