[BUG][FIX][TEST] BitBlt alpha compositing ([sm][approved])
Brent Vukmer
bvukmer at blackboard.com
Wed Apr 9 18:18:58 UTC 2003
Does this fix take care of the 32-bit display issues reported recently on the list? (See http://swiki.gsug.org:8080/sqbugs/760.html , for the most recent.)
> -----Original Message-----
> From: Doug Way [mailto:dway at riskmetrics.com]
> Sent: Wednesday, April 09, 2003 2:12 PM
> To: The general-purpose Squeak developers list
> Subject: [BUG][FIX][TEST] BitBlt alpha compositing ([sm][approved])
>
>
>
> I also verified that the simulated tests pass, at least.
>
> - Doug Way
>
>
> Andreas Raab wrote:
> >
> > Hi Folks,
> >
> > Attached is a test+fix for alpha compositing in BitBlt. It
> turns out that
> > when you're using Form>>blend (aka: alpha compositing) the
> resulting alpha
> > values are not at all what they should be. VERY problematic
> for stuff like
> > anti-aliasing.
> >
> > [Note to harvesters: Please consider integration ASAP. This
> presence of this
> > fix in the appropriate VMs will be critical for Croquet].
> >
> > Cheers,
> > - Andreas
> >
> >
> --------------------------------------------------------------
> ----------------
> > Name: BBCompositing.2.cs
> > BBCompositing.2.cs Type: ChangeSet
> (application/x-unknown-content-type-cs_auto_file)
> > Encoding: quoted-printable
> >
> > Name: BitBltTests.st
> > BitBltTests.st Type: unspecified type
> (application/octet-stream)
> > Encoding: quoted-printable
> >
> >
> --------------------------------------------------------------
> ----------------
>
>
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