Proposal: Dynamic Wallpapers in Plasma

[Kai Uwe Broulik]

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