Note: it's only the renderer that is changed from wxDC to GAL. Tools stay the same, consider this a temporary hack.
This commit splits the EDA_DRAW_FRAME, EDA_DRAW_PANEL and BLOCK_SELECTOR classes into two variants, each independently compiled into a static library.
- "legacy_wx" for PCBnew/Gerbview - wxDC-based legacy canvas. We have full GAL support there anyway so it makes no sense to introduce GAL rendering API to the legacy tools.
- "legacy_gal" for EEschema and the rest - GAL-based legacy canvas, using legacy tools but with a GAL renderer.
Such split ensures only a small part of the common library and eeschema is affected, without messing around with already GALified tools.
The commit also removes some header dependencies on class_drawpanel.h
The old item pointers (which aren't safe to keep around) were
removed in favour of opaque references (void*) which are then
compared against existing items when needed.
Also improves brightening by brightening the whole footprint
(ie: its pads, drawings, reference and value) rather than just
its target cross.
(cherry picked from commit 30e90b0)
For some DRC checks, the location of the marker is not the location
of the first item in the resulting DRC_ITEM, so centering the screen
on PointA of the DRC_ITEM can be confusing.