git.hungrycats.org Git - xscreensaver/blob - utils/alpha.h

   1 /* xscreensaver, Copyright (c) 1992, 1995, 1996, 1997
   2  *  Jamie Zawinski <jwz@jwz.org>
   3  *
   4  * Permission to use, copy, modify, distribute, and sell this software and its
   5  * documentation for any purpose is hereby granted without fee, provided that
   6  * the above copyright notice appear in all copies and that both that
   7  * copyright notice and this permission notice appear in supporting
   8  * documentation.  No representations are made about the suitability of this
   9  * software for any purpose.  It is provided "as is" without express or
  10  * implied warranty.
  11  */
  12
  13 #ifndef __XSCREENSAVER_ALPHA_H__
  14 #define __XSCREENSAVER_ALPHA_H__
  15
  16 extern int allocate_color_planes (Display *dpy, Colormap cmap,
  17                                   int nplanes, unsigned long *plane_masks,
  18                                   unsigned long *base_pixel_ret);
  19
  20 extern void initialize_transparency_colormap (Display *dpy, Colormap cmap,
  21                                               int nplanes,
  22                                               unsigned long base_pixel,
  23                                               unsigned long *plane_masks,
  24                                               XColor *colors,
  25                                               Bool additive_p);
  26
  27 extern Bool allocate_alpha_colors (Display *dpy, Colormap cmap,
  28                                    int *nplanesP, Bool additive_p,
  29                                    unsigned long **plane_masks,
  30                                    unsigned long *base_pixelP);
  31
  32 #endif /* __XSCREENSAVER_ALPHA_H__ */