For future reference:
The trick is to create a GDI image from a
The trick is to create a GDI image from a
MemoryStream of the PNG picture. That can then be used to create a XImage as callback parameter.using(var mem = new MemoryStream(img.Data))
{
System.Drawing.Image sysImg = System.Drawing.Image.FromStream(mem, false, true);
XImage ximg = XImage.FromGdiPlusImage(sysImg);
args.Callback(ximg);
}