well I just tried plain ImageMorph, indeed the pngs render with their transparency but I get the exact same performance. No I dont need my canvas to be transparent only the pngs that will render on top of it.��

No idea how to do with Athens , I am looking at the examples but so far no luck.��

On Sun, Sep 14, 2014 at 11:30 AM, Hilaire <hilaire@drgeo.eu> wrote:

Le 13/09/2014 19:49, kilon alios a ��crit :

Would Athens be faster in this case ? I did not try because Athens is
using Morphic anyway so it should be same if not worse.

Athens may be faster because only the final drawaing is done on the morph, not your intermediate drawing, if I understand correctly, so worth trying.

Why do you need AlphaImageMorph? You want to adjust the overall transparency of your morph canvas? In that case, I think it will be always slow because software rendered.

Note: for PNG file coming with alpha transparency, you don't need AlphaImageMorph to get the bitmap rendered with its transparency.

Hilaire

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