From: Pekka Paalanen <pekka.paala...@collabora.co.uk>
Explains what weston_view::clip is.
Signed-off-by: Pekka Paalanen <pekka.paala...@collabora.co.uk>
---
src/compositor.c | 16 ++++++++++++++++
src/compositor.h | 2 +-
2 files changed, 17 insertions(+), 1 deletion(-)
diff --git a/src/compositor.c b/src/compositor.c
index 9e2bd80..d408ccb 100644
--- a/src/compositor.c
+++ b/src/compositor.c
@@ -943,6 +943,22 @@ weston_view_move_to_plane(struct weston_view *view,
weston_surface_damage(view->surface);
}
+/** Inflict damage on the plane where the view is visible.
+ *
+ * \param view The view that causes the damage.
+ *
+ * If the view is currently on a plane (including the primary plane),
+ * take the view's boundingbox, subtract all the opaque views that cover it,
+ * and add the remaining region as damage to the plane. This corresponds
+ * to the damage inflicted to the plane if this view disappeared.
+ *
+ * A repaint is scheduled for this view.
+ *
+ * The region of all opaque views covering this view is stored in
+ * weston_view::clip and updated by view_accumulate_damage() during
+ * weston_output_repaint(). Specifically, that region matches the
+ * scenegraph as it was last painted.
+ */
WL_EXPORT void
weston_view_damage_below(struct weston_view *view)
{
diff --git a/src/compositor.h b/src/compositor.h
index 5c3ee2f..fa79569 100644
--- a/src/compositor.h
+++ b/src/compositor.h
@@ -764,7 +764,7 @@ struct weston_view {
struct weston_plane *plane;
struct weston_view *parent_view;
- pixman_region32_t clip;
+ pixman_region32_t clip; /* See weston_view_damage_below() */
float alpha; /* part of geometry, see below */
void *renderer_state;
--
2.0.5
_______________________________________________
wayland-devel mailing list
wayland-devel@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/wayland-devel
