I'm trying to write a plugin to apply effects like
this(http://mrdoob.com/projects/harmony/) to any path.
I've done the coding, but it runs too slow, it speed several minutes
to draw 7000 lines on my laptop.
Currently i use following methods to draw lines:

    pdb.gimp_paintbrush_default(drawable, 4, [x1,y1,x2,y2])

I guess the overhead of pdb api is too heavy. Is there any alternate
way to achieve my purpose?
I can't find a proper one in pdb, maybe i should use cairo api to draw
a back buffer, then send it to gimp, but i have no idea how to do

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