Note: This manual is provided for your convenience only - this is not the official source and may not be 100% up to date.
Descriptionbool 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.