?flattenImages & opacity

[igorvlassov]

When I use STL ImageMagic++ func flattenImages under a list of PSD layers the result image lost opacity. Do you know the way to keep opacity or inherit it from the first layer?

Thanks

[magick]

The flatten-image algorithm starts with an image canvas set to the image background color. Try setting the image background color to "none" which means completely transparent.

[igorvlassov]

I tried to use
image.backgroundColor(Color(0,0,0,QuantumRange));
flattenImages(&image, lstImages.begin(), lstImages.end());

but opacity didn't appear.

[seanburke1979]

"Color(0,0,0,QuantumRange)" is black, isn't it? Try image.backgroundColor(Color(0,0,0,1.0)). I haven't tried that, but the doumentation says that alpha is scaled 0->1.0 (opaque to transparent).

Sean