Android Question Anti-aliased clippath or 8bit selection mask

[NeoTechni]

Instead of a binary clippath (pixel is or isn't selected) is there a way to have 8bit/anti-aliased clip path?

Or even a mask? (you have an image that acts as the clip path based on the shade of grey the pixel is)

 

[Erel]

It is possible to create a mask. However why not use two layers? It will be simpler.

 

[NeoTechni]

Layers? I don't follow.

 

[Erel]

What exactly are you trying to implement? I thought that you were asking about a selection box.

 

[NeoTechni]

I want to draw a bitmap using a second bitmap as a mask. The mask would control the alpha of each pixel, based on what shade of grey the corresponding pixel in the mask is. white = 0, black=255
I've read it has something to do with Paint.setXfermode

 

[Erel]

This library should allow you to do this: https://www.b4x.com/android/forum/threads/abextdrawing-1-0.14638/#content