Re: Re: I-worm/Klez and a GIF query/question

"R" <r@jumac.com> wrote in message news:001501c1f369$060a52a0$0a6da8c0@lgwezec83s94bn... > Hey, > Thanks for replying, > Do you by any chance have the code or functions that i can use to do this? > even to output on jpeg should be ok. > Cheers, > -Ryan If outputting a JPEG is ok, why bother? I guess you could up the output quality to prevent blurring... I don't have code to hand, but I can tell you how to go about it: Look up the Gif89a format spec; it will tell you how to write the header (desired bits-per- pixel, size, etc). Count the number of different colors you use. Set the bits-per-pixel to the lowest value such that 2^bpp>= numcols+1, and encode at bpp+1 actual bits per pixel, always referring to entries in the _existing_ palette, one entry per pixel. This is obviously less efficient than the LZW expanding-dictionary scheme, but avoids patent infringement. I recommend writing this as a PHP function that accepts an image structure and returns a bit-string; that will make it very easy to integrate into your scripts. ... if this sounds too complicated, you could always hire me to do it instead (hint, hint).