[BUG][FIX][TEST] BitBlt alpha compositing ([sm][approved])
Doug Way
dway at riskmetrics.com
Wed Apr 9 18:11:38 UTC 2003
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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