chickadee » leptonic » pix-RGB-to-gray-fast

• in - PPIX - 32bpp RGB image
• returns: 8bpp ppix or #f if error.

<procedure>pix->32bit PPIX </procedure>

• in - PPIX - 1, 2, 4, 8, 16, 24 or 32 bpp
• returns: ppix or #f on error.