[cairo] Sub-pixel rendering and image-in-memory backend

Ned Konz ned at squeakland.org
Thu Dec 2 11:52:23 PST 2004

Hi all,

I'm still working on the Squeak bindings for libcairo.

I'd really like some better text handling, though; if I use Freetype/2 
directly, I can get sub-pixel rendered and hinted glyphs (in vertical or 
horizontal RGB or BGR formats).

However, I can't see a way to do this when using Cairo to render to an 
in-memory bitmap. Which is what I'm doing, for cross-platform purposes and to 
play well with other Squeak graphics (plus we already have fast BitBlt 

Ideally, I'd think that I should be able to tell Cairo that the bitmap will be 
used as output to something with a particular layout of sub-pixels, and it 
would use that information to do the right thing for all rendering, not just 

But SPR for text alone would be a big improvement.

Maybe there's a way to do this that I'm missing; if so, I'd sure appreciate a 

Ned Konz

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