Zeh Fernando wrote:
I have a project that creates comic strips, and the owner would like
me to make it so that users can download an image of the comics they
create. I have looked around, and found that this is possible to do
in Flash 8, but there are some performance considerations. I've seen
it mentioned a few times that you can help the problem, which seems
to be tied mostly the time it will take to upload an uncompressed
bitmap to a server, by compressing the bitmap stream using RLE or
LZW. I haven't found any examples that I can follow that show or
explain how to do that.
Does anyone have an example of how I can compress a bitmap stream
then upload it to a server (any server scripts in php to send that
data back as an image file, are a bonus ;-) ).
There are many AS classes that do LZW compression for you, and RLE
could easily be done with new code.
Depending on what kind of data you'll compress - ie, black & white
data - RLE is good enough. If not, LZW is the way to go, but you'll be
spending *a lot* of time reading them compressing it.
You would need the decoding done on the server side script too. The AS
part is just half of the equation. LZW is standardized, though, so if
you're going with LZW data, it might be easy to find LZW decoders in PHP.
Another possible solution (depending on your case) would be to use
AS3. It can do PNG generation natively and faster (so you'd have to
upload the PNG data, then simply output it to a file when the PHP
receives it).
Anyhow, if you're looking for LZW in AS2, I would suggest this one:
http://hosted.zeh.com.br/misc/classes/zeh/compression/LZW.as
It's the one I've done for my own use, the difference from all others
being that it has functionality to split the compression between
frames instead of trying to do all at once (and freezing playback).
Read the .AS file for usage examples.
Zeh
Sweet! Thanks for the link.
Kevin N.
_______________________________________________
[email protected]
To change your subscription options or search the archive:
http://chattyfig.figleaf.com/mailman/listinfo/flashcoders
Brought to you by Fig Leaf Software
Premier Authorized Adobe Consulting and Training
http://www.figleaf.com
http://training.figleaf.com
