=> 
> You have surely taken a look here:
> http://www.libpng.org/pub/png/pngaptk.html


I have found FreeImage which from the docs seems to be exacly what I 
am looking for.  The libpng stuff is too low level for what I want.



On caching:  how many different bitmap file names do you use?  Right 
now, the cache can hold up to 32.

Right now, all bitmaps are pre-loaded into a shared pool. I also am 
wondering whether it might be simpler to just to give up on pre-
loading and caching and read the file each time the image is 
needed.  That happens right now for icons in some circumstances and 
does not seem to cause a performance issue when it does.









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