Change background color of imageview

[capoaira]

When I open a image (e.g. animated gif) with transparent background, it is showed on a black background. Now I have the problem, that black pixel are "not visible".
It would be nice to have the possibility to change the background to white.

Example Cache: https://coord.info/GC5PY8M
Example Image: https://geocheck.org/md5pics/2b96eadb84348f53bdec5494a5032999.gif