project images alpha channel

General
1

I’m working on updating an app and taking advantage of the new alpha channel goodness in Xojo (using 2014r2)

I can’t seem to preserve / import the alpha channel from a PNG image. I’m wanting to use project images (embedded in the project as opposed to loaded explicitly from a file)

So, I have a PNG file that Preview tells me has an alpha channel (and it previews correctly), yet in the Xojo project (compiled for Cocoa):

myImage.hasAlphaChannel is false

dim p as picture = myImage
p.hasAlphaChannel is also false

Am I missing something or is there a bug in here I can’t find info about?

2

the alpha channel is provided as mask, so hasAlphaChannel must be false.

3

ok… that seems weird. So we convert it to the alpha channel to use it?

4

of course. Make a new picture with alpha channel and draw it there.
But normally there is no need to convert.

5

OK, thanks.

I was doing something odd with other drawing that was making it unmasked.

Thanks for your help.