   #PHP Manual Image functions imagesy imagettfbbox

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                            imagetruecolortopalette

   (PHP 4 >= 4.0.6)
   imagetruecolortopalette -- Convert a true color image to a palette
   image

Description

   void imagetruecolortopalette ( resource image, bool dither, int
   ncolors)

   imagetruecolortopalette() converts a truecolor image to a palette
   image. The code for this function was originally drawn from the
   Independent JPEG Group library code, which is excellent. The code has
   been modified to preserve as much alpha channel information as
   possible in the resulting palette, in addition to preserving colors as
   well as possible. This does not work as well as might be hoped. It is
   usually best to simply produce a truecolor output image instead, which
   guarantees the highest output quality.

   dither indicates if the image should be dithered - if it is TRUE then
   dithering will be used which will result in a more speckled image but
   with better color approximation.

   ncolors sets the maximum number of colors that should be retained in
   the palette.

     Note: This function was added in PHP 4.0.6 and requires GD 2.0.1 or
     later
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