int _ncolors; // number of allocated colors, size of the XColor array
XColor *_colors; // the valid allocated colors
virtual void reduceDepth(Surface &sf, XImage *im) const;
int _ncolors; // number of allocated colors, size of the XColor array
XColor *_colors; // the valid allocated colors
virtual void reduceDepth(Surface &sf, XImage *im) const;