Find if pixel is transpatent

[iphonejudy]

I try to find transparent pixel.

I looked the coregraphics documentation.

But there is no method available for finding,Whether a pixel is a tranparent?


Any one know?

[robbieduncan]

Assuming you can find the colour of the pixel just check the alpha channel.

[firewood]

I think I once saw a transparent pixel or two on a special "heads-up" display panel at an electronics trade-show.

Try looking there.

[iphonejudy]

What?