kicad-developers team mailing list archive
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Kicad GAL branch announcement
As Lorenzo has already unveiled part of the message, I think it should
be announced in the public list, so everyone knows what is the talk about.
I would like to present you the preview version of the Graphics
Abstraction Layer-based rendering engine for Kicad, done according to
the following specification:
The branch is mostly based on efforts of Dick Hollenbeck, Torsten
Hueter, Tomasz Wlostowski and mine.
Currently it uses OpenGL GAL backend for rendering PCBs in pcbnew, with
Cairo support compiled in but disabled due to some graphical
glitches that we still have to debug.
I'm eagerly waiting for your feedback - please rememeber that this is
just a demo, it lacks some features, and despite our efforts it may not
compile on platforms other than Linux (with wxWidgets 2.8.12/2.9.4 &
Cairo 1.10) and Win32 (with wx 2.9).
You can download it from my branch in Launchpad and compile it with
CMake flag KICAD_GAL=ON:
bzr branch lp:~orsonmmz/kicad/kicad
cmake -DKICAD_GAL=ON -DKICAD_TESTING_VERSION=ON ..
After starting up pcbnew you can switch between GAL and legacy rendering
using Alt+F12 hot key or via View->Switch canvas menu option.
I hope you will notice some speedup during panning & zooming. Currently
GL renderer is not much faster than the legacy one, but there
is a lot of room for optimization (that is, caching the board geometry
in hardware buffers, which will likely increase the performance
by an order of magnitude).
More details about changes introduced by us can be found in the bzr log
(personally I recommend revision 4029 changelog, as it was the
that the GAL view is currently not editable - as the GAL has no XOR
rendering, editing tools will have to be modified to take advantage of
the new renderer.
Maciej Sumiński, CERN