[cairo] thin antialiased lines

[Tamas K Papp]

On Mon, Jul 16, 2007 at 05:22:58PM -0400, Jeff Bezanson wrote:
> > have the same "problem" of too thick or blurry lines. One example is
> > the statistical package R (www.r-project.org). Plotting a normal
> > distribution looks very nice, while plotting a survival curve (which
> > basically consists of more or less horizontal lines) looks blurry.
> 
> I would expect that for scientific graphics this is, in at least some
> sense, a very good thing, because what cairo is doing amounts to drawing
> the line closer to its true location. Two values that differ by less
> than a pixel will actually look slightly different instead of getting
> hammered into the same pixel row. For graphing, this is a big win, at
> least for me.

I agree, that's why there is no integer alignment in cl-cairo2.
Anyhow, for experimenting on the desktop with data, blurry lines are
fine, and for pulication/wider audience one uses vector formats like
EPS anyway.

Tamas