On Fri, Apr 25, 2008 at 1:08 PM, Michael Droettboom <[EMAIL PROTECTED]> wrote:
> They don't look non-antialiased to me (in your attachment or a file I
> generated locally).  Remember, the rotation happens in raster (not vector)
> space, because that was the path of least resistance, but is a bit of a
> hack.
>
>  The difference is that the trunk appears slightly darker than 0.91.x.  (And
> 0.90.x, if I recall correctly, didn't support non-90 degree rotations of
> text at all).  0.91.x is using spline36 interpolation, trunk is using
> spline16.  I *think* I changed it because I thought spline16 looked slightly
> cleaner (though technically less accurate), and of course is faster, but I'm
> not sure anymore -- SVN blame isn't helping me remember.  It could have just
> been the example I was using at the time looked better.
>
>  In any case, you should be able to change this line in
> _backend_agg.cpp:2197
>
>   filter.calculate(agg::image_filter_spline16());
>
>  to any of the interpolation kernels that Agg offers, and experiment until
> you find something suitable.

Hmm, I tried setting the interpolation back to what it is on the
branch, but this doesn't explain it.  If you run

t = text(0.5, 0.5, 'hi mom', fontsize=20)
t.set_rotation(30); draw()

and save the results from the trunk and the branch (using
agg::image_filter_spline36) on both, it appears (as you say) that the
font weight is darker for rotated text, but not for non-rotated text.

JDH

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