Patch: Many composite/blend modes mostly compatible to Adobe Photoshop (c)

[Boudewijn Rempt]

On Friday 14 January 2011, Timothée Giet wrote:
> Hi,
> 
> I've looked at the patch (only the comments of course, as I don't understand
> mmuch the code..) and it looks cool!
> 
> As you are working on blending modes, do you think it could be possible to
> add a simple "Onto" mode ?
> (when painting on a layer with Onto blend mode, it display exactly what you
> paint but respecting the transparency of layer(s) under.)

Doesn't the "alpha lock" do that?

> 
> very useful when painting on another layer over an existing area under it ..
> more handy than to have to go on the layer under, select from opaque and
> return to paint layer !
> (and leaves selection free to do other things with it at the same time) or
> alternatively use 1 more transparency mask layer where it could be avoided.
> 
> what do you think about this?
>