matplotlib-devel Mailing List for matplotlib

I've implemented draw_markers() for Cairo, and tested it using line-
styles.py - it seems to be working OK. I did find that it caused
draw_lines() to stop working and had to modify it to get it working
again.
I don't think 'fill' and 'fill_rgb' information should be encoded into
the 'path', and would to prefer to have rendering separated into two
independent steps:
1) call a function to parse 'path' and generate a path - the path is a
general path (with no fill or colour info) that you can later use any
way you wish.
2) set colour etc as desired and fill/stroke the path.
The draw_markers() code I've written calls generate_path() before
drawing each marker and it reads the fill value and the fill_rgb each
time which it unnecessary since the values are the same for all the
markers. Passing the fill_rgb as an extra argument to draw_markers()
would be one way to 'fix' this.
Cairo (and probably Agg, PS, SVG) supports rel_move_to() and rel_line_to
() - so you can define a path using relative rather than absolute
coords, which can sometimes be useful.
For example, instead of
	translate(x,y)
 	generate_absolute_path(path)
 stroke()
you can use 
	move_to(x,y) 
 generate_relative_path(path)
 stroke()
and the path is stroked relative to x,y with no need to translate the
coordinates.
Steve