Hi 2 all!
I made test, where creating mutable image:
img = Image.createImage(392, 392)
and making some scroll of that image (30 seconds for stable result) and min/max memory usage count in this time
Memory taken buy image very small!!! :
(runtime.totalMemory()-runtime.freeMemory()) ~ 28kb
WHY? I know that memory values (by runtime) not true, but difference between them near true value
392x392=153664 (only in 1 byte on color!) - it's more than 28Kb!
And 28Kb takes all midlet (created mutable image, loaded png tileset for fill image, midlet code)
So, maybe memory compressed or something else?