On Oct 6, 2013, at 9:23 PM, Marcelo Alves <marcelo.al...@me.com> wrote:

> I don’t know if you know it, but “ClearType” / antialiasing in fonts works 
> only on opaque images, you won’t have the best rendering method possible if 
> your background is transparent.

Thanks! That was the problem. In the image-drawing block I just needed to start 
out by filling the image with an opaque background before drawing the text. 
That was enough to enable sub-pixel anti-aliasing.

—Jens
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