#Gasp! ANIM speed
04-Jul-91 12:39:37
Sb: #9893-#Gasp! ANIM speed
Fm: John Pendergrass 76246,676
To: Charles Blaquiere 76046,1756
Charles, sorry to bear bad news, but…. since you are in HAM-E mode, your
352×220 images are actually 704×220 to the system (remember?)…. so in
uncompressed format you have: 704×220 = 154,880 pixels / 8 (bytes) * 4
(bitplanes) = 77,440 RAM per image * 25 frames = 1,936,000 RAM needed for
uncompressed page flipping.
So, with a 1meg chip ram machine, you can store about 10 frames or so in
chip ram buffers for page flipping. With a 2meg chip ram machine you might
be able to store 22-25 frames, depending on other uses, fragmentation, etc.
The Director will allow you to allocate these buffers, and page flip them
*real fast* for you, if you can get them in chip ram. Unfortunately not
even the Director is very swift are page flipping when the buffers are in
Fast ram (about 4 fps with above image sizes). 🙁
Like Paul suggested, you might try DPaint in its uncompressed anim mode;
what speed difference do you see?
PageFlipper PF/X will not do uncompressed anims, but is about 10-25% faster
than regular anims, at a cost in size. (wow! You could get 4.75 fps!)
There is a shareware anim player called TIV in the BlackBelt library in
AmigaVendor that purports to play regular anims faster than ShowAnim,
etc….
Other misc thoughts: did you lock the palette when rendering to HAM-E
mode? Do you *need* overscan? (the same images above without oscan are
only 64,000 bytes, a 21% savings) All-in-all, you are faced with
comprimises. Are you *sure* you don't want to give away your graduated
background? 🙂 –jp–seattle–