Don't recursively duplicate all items. Instead, just duplicate the
items in the toplevel image containers, because group items duplicate
their children correctly all by themselves.
New function takes a GList of items as returned by
gimp_image_item_list_get_list() and can filter out items that:
- have lock_content set to TRUE.
- are children of items that are also in the list (to avoid
transforming group items *and* their children, because
the group items already do that for us).
Insert a gegl:translate node into the group layer's projection
graph. Produces identical results as the legacy projection now, but is
not yet switched on by checking View->Use Gegl.
Add implementations for GimpItem::translate(), scale(), resize(),
flip(), rotate() and transform(). Simply transform all children, the
group layer will automatically update itself. Also transform the layer
mask.
Implement the GimpProjectable interface and keep a GimpProjection
around that projects the GimpDrawableStack of our children. Propagate
the childrens' "update" signals to our own "update" signal so our
parent projection picks up all changes.
Add/Subtract the projectable's offset whenever we go from coordinates
from our public interface (which are always image coordinates) and
coordinates in out internal tile pyramid (wihch always starts at 0,0).
The Gegl projection still needs an offset node that is missing.
Also, connect to the projectable's "update" signal using
g_signal_connect_closure_by_id() instead of simply g_signal_connect(),
so we really connect to the signal of the GimpProjectable interface
and not to the "update" signal of GimpDrawable (which is a conflict
that will happen on group layers).
Add GimpProjectable::get_offset() and gimp_projectable_get_offset()
which returns the offset of the projectable in image coordinates, so
we can have projections that act as a viewport onto things that live
in image coordinates.
Add gimp_item_can_lock_content() and gimp_layer_can_lock_alpha() which
return TRUE unless the item is a grop (has children), because group
items will be considered to have lock_content always TRUE and
lock_alpha always FALSE.
Took patch from Martin Nordholts and ported it to add a "lock-content"
property, signal and API in the same way as it's done for "visible"
and "linked".
Add support for having obsolete data resources. An obsolete resource
is not shown in the UI or managed in any way, but it will be
considered when plug-ins requests resources. This in order to maintain
backwards compatibility for plug-ins.
Don't reuse the GeglProcessor as it can't handle dirty rects when
painting in GIMP, and this makes it harder to make GEGL-wise progress
in other parts of GIMP.
