[Vm-dev] Fwd: [Pharo-project] New Pharo based on core 10309 with antialiased fonts

Andrew Tween amtween at hotmail.com
Thu May 21 21:39:11 UTC 2009

Hi Juan,

That's cool. 

Congratulations on finding the 'magic' combination of bitBlt rules.


I'm not sure where that leaves my bitBlt rule 41. Possibly rendundant.


But unfortunately I don't have much free time to change the FreeType stuff to use your technique.

Maybe one of the Pharo developers can make the necessary changes.


Of course I also added the gamma correction, and the handling of translucent text foreground colours.

So, it may be worth keeping both techniques around for a while.




> Date: Thu, 21 May 2009 16:46:28 -0300
> From: juan at jvuletich.org
> To: vm-dev at lists.squeakfoundation.org
> Subject: Re: [Vm-dev] Fwd: [Pharo-project] New Pharo based on core 10309 with antialiased fonts
> > You can see how well this works by going to 
> > http://www.jvuletich.org/Cuis/ and downloading the new Cuis #0204.
> > See how well it does subpixel AA with black and colored text. Change 
> > display depth, and see how it adapts to lower display depths. Also 
> > play with preferences #subpixelRenderText and 
> > #subpixelRenderColorText. All this is done with just one 16bpp glyph 
> > for each char/font/size! No extra caches. Just standard rules, 
> > colormaps, and thought.
> Some screen shots...
> Sub pixel AA:
> http://www.jvuletich.org/Cuis/32BitDisplay-SubPixAA.png . That is the 
> best look. Display at 32 bpp, sub pixel AA.
> http://www.jvuletich.org/Cuis/16BitDisplay-SubPixAA.png
> http://www.jvuletich.org/Cuis/08BitDisplay-SubPixAA.png
> Whole pixel AA:
> http://www.jvuletich.org/Cuis/32BitDisplay-WholePixAA.png
> http://www.jvuletich.org/Cuis/16BitDisplay-WholePixAA.png
> http://www.jvuletich.org/Cuis/08BitDisplay-WholePixAA.png
> For less than 8bpp, no subpixel AA is available:
> http://www.jvuletich.org/Cuis/04BitDisplay.png
> http://www.jvuletich.org/Cuis/01BitDisplay.png
> I did not include subpixel black and whole pixel color, but it is 
> possible too.
> Anyway, people really interested on this should check the code. Besides, 
> playing 5 minutes with Cuis should be good for any squeaker, to realize 
> that Squeak can be nice, simple and fast.
> Cheers,
> Juan Vuletich

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