Hi,
According to Qt documentation, if QImageReader::imageCount() returns a positive number, it means that the file contains an animated image.
And that isn't even true. An ICO (windows icon file) has all its contained pixmap sizes and depths as a flat list. E.g. in the windows icon thumbnailer I iterate all icons to find the one with highest color depth and best fitting size.
It appears there's a need for a collection/dict API in QImageReader either way.
> As far as I know, GIMP just shows a dialog with all images and you just pick the one you want to edit.
At least with ICO just dumps all pixmaps into different layers of the same canvas.
In any case, if ICO abuses QImageReader "sequential API" I don't see why HEIF couldn't :)
Cheers Kai Uwe
