expo: Draw the current opened menu on top

When a menu is opened, it must be displayed over all other objects in
the scene, so that all its items are visible.

Handle this by drawing the menu object a second time, after all other
objects have been drawn. Draw all of the objects which are dependent
on the menu object.

Signed-off-by: Simon Glass <sjg@chromium.org>

1 files changed, 31 insertions, 0 deletions

diff --git a/boot/scene.c b/boot/scene.c
index fb199ef295..bc213bc08b 100644
--- a/boot/scene.c
+++ b/boot/scene.c
@@ -421,6 +421,30 @@ int scene_arrange(struct scene *scn)
 	return 0;
 }
 
+int scene_render_deps(struct scene *scn, uint id)
+{
+	struct scene_obj *obj;
+	int ret;
+
+	if (!id)
+		return 0;
+	obj = scene_obj_find(scn, id, SCENEOBJT_NONE);
+	if (!obj)
+		return log_msg_ret("obj", -ENOENT);
+
+	if (!(obj->flags & SCENEOF_HIDE)) {
+		ret = scene_obj_render(obj, false);
+		if (ret && ret != -ENOTSUPP)
+			return log_msg_ret("ren", ret);
+
+		if (obj->type == SCENEOBJT_MENU)
+			scene_menu_render_deps(scn,
+					       (struct scene_obj_menu *)obj);
+	}
+
+	return 0;
+}
+
 int scene_render(struct scene *scn)
 {
 	struct expo *exp = scn->expo;
@@ -435,6 +459,13 @@ int scene_render(struct scene *scn)
 		}
 	}
 
+	/* render any highlighted object on top of the others */
+	if (scn->highlight_id && !exp->text_mode) {
+		ret = scene_render_deps(scn, scn->highlight_id);
+		if (ret && ret != -ENOTSUPP)
+			return log_msg_ret("dep", ret);
+	}
+
 	return 0;
 }