You may hold them in arrays with xy index, so you won't have to readpixel them from the tilemap and/or prerotated images.
It's pretty slow to toggle between reading and writing pixels. A lot faster to write only using data taken from RAM and not VRAM, eg. Arrays or Banks.
Ehrm, never testes the speed diffrence of writepixelfast and copyrect. Should be easy to write a test program.
It's pretty slow to toggle between reading and writing pixels. A lot faster to write only using data taken from RAM and not VRAM, eg. Arrays or Banks.
Ehrm, never testes the speed diffrence of writepixelfast and copyrect. Should be easy to write a test program.