[Newbies] Fading a PNG
bert at freudenbergs.de
Mon Apr 23 00:29:54 UTC 2007
On Apr 23, 2007, at 0:44 , Steven Greenberg wrote:
> I have a PNG image that I'd like to display fading out. I tried
> the BitBlt method suggested by "Team RAR" to fade the image, but I
> can't make it work.
> The image loads properly from a file and displays fine as an
> ImageMorph. I have been able to use a TransformationMorph to
> rotate and scale it, and PNG transparency is working properly.
> Is the "Team RAR" BitBlt method the only way, or are there
> I'm running a 3.9 image, and my display depth is set to 32 bits.
Normally you would just use an alpha-blending canvas. See HaloMorph
fadeIn/fadeOut and draw methods. To try those halos, enable this:
Preferences enable: #haloTransitions
Now when I tried then the halo icons do not actually show until alpha
is one. No idea why that is.
- Bert -
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