Hi every one,

I'm tring to achieve the following things : - have an image in black&white, as you can see in enclosure. - detect white color - replace white by alpha channel (or other color) / and inverse : replace black by alpha channel - send it by syphon with alpha channel

I'm trying to achieve this with slab and alphaglue, but it's doesnt work as expected.

If i can do this in gl, it would be perfect! Do you have any idea ?

Thanks!