(PHP 4 >= 4.0.6)
ImageTrueColorToPalette -- Convert a TRUE color image to a palette
image
Description
void imagetruecolortopalette (resource im, 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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