On Tue, Mar 3, 2009 at 7:17 AM, xianghang liu
<address@hidden> wrote:
Yes, I think I am interested in this. Would you please tell me how
to start
and give me more details about this?
Thanks.
Xianghang
On Tue, Mar 3, 2009 at 12:33 PM, Shai Ayal <address@hidden> wrote:
On Tue, Mar 3, 2009 at 4:36 AM, xianghang liu <address@hidden
>
wrote:
Hi,
I am a C++ developer very interested in Octave and would like to
contribute.
I have had a look at projects listed at
http://www.gnu.org/software/octave/projects.html. I would like to
contribute
numerical and IO related projects in the list. Would you please
show me
a
more current copy of this?
Hi,
I'm not sure it's what you meant by IO related, but the graphics
system is really in need of a c++ developer. We need someone to
implement text objects.
If this interests you, I'm sure Michael and I could help you start
out
Shai
Great!
I'll give you a very brief overview with which you can start, and just
ask question as you go. It's also better if you ask on the maintainers
list (or at least cc the list) instead of me directly for 3 reasons:
1. someone else might be able to answer better/before me
2. someone else will be able to correct me!
3. we will have a record of the discussion and changes that everyone
can see.
Also, please use bottom posting as it is much easier to read later
The graphics system in octave is made of two parts -
1. core graphics, which includes all the parts that are independent of
the actual graphics implementation and underlaying OS (i.e. the object
hierarchy, setting/getting properties and more). Core graphics is
implemented in the (very large) files:
graphics.h.in, graphics.cc. graphics.h.in is converted to graphics.h
by the script genprops.awk. all of these files are in the src
directory
2. backends - these are in charge of the actual rendering and deal
with the underlaying graphics system. Currently we have 2 backends,
the gnuplot backend and the fltk backend which uses the
opengl-renderer.
The text object is very complex (probably why it is left undone) in
that it is a core graphics object, but also has dependencies on the
backend: As Ben noted, the text object has an "extent" property which
should hold the text bounding box. This is dependent on the text and
font properties. Only the backend knows the font properties, so this
has to communicated from the backend to the core-graphics system. We
need to decide how to do this and implement.
Also there is the whole issue of simple TeX rendering for text.
Shai