Apply palette

gistfile1.py

import pgmagick

if __name__ == "__main__":

    # load input image and palette
    img = pgmagick.Image('origRGBA.png')
    palette = pgmagick.Image('palette.png')

    # make input image binary opaque - needed for PNG8
    img.channelDepth(pgmagick.ChannelType.MatteChannel, 1)

    # apply palette
    img.map(palette, False)

    # set background to rgb(0,0,0,0) - input image background color is
    # set to white, would fail with error from Magick:
    # "Invalid background palette index"
    img.backgroundColor('none')

    # save it as sRGB PNG - OK
    img.write("palRGBA.png")