Question about cache

Hi,

I've tried to read docs but can't find easy answer to a complex need :
- My app displays lot's of images downloaded but in multiple places with potentially different size and transformations.
- Users should be able to pre load image cache for offline usage.
- Sources images could be quite big so should be cached at a limited resolution depending on device.
- Image cache path should be available for sharing purpose.

From what I read SOURCE cache strategy would cache the original image at full size.
And it does not seems to be possible to have a different cache store for SOURCE and RESULT to have a permanent source cache and an lru for result.

Have I missed something in the docs or could all those requirement be handled currently ?

Regards,
Tolriq