xwayland: Add a direct hook to create pixmaps with glamor

With linux dmabuf v4 support, for direct scanout support, we need more
context that just what CreatePixmap() provides, as we need the actual
drawable to invoke xwl_glamor_get_drawable_modifiers().

Add a specific hook in Xwayland's glamor implementation that we can use
for that purpose.

This is preparation work for the direct scanout fixes.

Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>
Reviewed-by: Michel Dänzer <mdaenzer@redhat.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/hw/xwayland/xwayland-glamor.c b/hw/xwayland/xwayland-glamor.c
index af227bb03..b714f9be0 100644
--- a/hw/xwayland/xwayland-glamor.c
+++ b/hw/xwayland/xwayland-glamor.c
@@ -919,6 +919,20 @@ xwl_glamor_needs_n_buffering(struct xwl_screen *xwl_screen)
                 XWL_EGL_BACKEND_NEEDS_N_BUFFERING);
 }
 
+PixmapPtr
+xwl_glamor_create_pixmap_for_window(struct xwl_window *xwl_window)
+{
+    struct xwl_screen *xwl_screen = xwl_window->xwl_screen;
+
+    if (!xwl_screen->glamor || !xwl_screen->egl_backend)
+        return NullPixmap;
+
+    if (xwl_screen->egl_backend->create_pixmap_for_window)
+        return xwl_screen->egl_backend->create_pixmap_for_window(xwl_window);
+    else
+        return NullPixmap;
+}
+
 void
 xwl_glamor_init_backends(struct xwl_screen *xwl_screen, Bool use_eglstream)
 {