/* $XConsortium: VisCmap.c,v 1.10 89/10/08 15:05:47 rws Exp $ */

/* 

Copyright (c) 1989  X Consortium

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Except as contained in this notice, the name of the X Consortium shall not be
used in advertising or otherwise to promote the sale, use or other dealings
in this Software without prior written authorization from the X Consortium.

*/

/*
 * Author:  Donna Converse, MIT X Consortium
 */

#include <stdio.h>
#include <math.h>
#include <X11/Xlib.h>
#include <X11/Xatom.h>
#include <X11/Xutil.h>
#include <X11/Xmu/StdCmap.h>

/*
 * To create all of the appropriate standard colormaps for a given visual on
 * a given screen, use XmuVisualStandardColormaps.
 * 
 * Define all appropriate standard colormap properties for the given visual.
 * If replace is true, any previous definition will be removed.
 * If retain is true, new properties will be retained for the duration of
 * the server session.  Return 0 on failure, non-zero on success.
 * On failure, no new properties will be defined, and, old ones may have
 * been removed if replace was True.
 *
 * Not all standard colormaps are meaningful to all visual classes.  This
 * routine will check and define the following properties for the following
 * classes, provided that the size of the colormap is not too small.
 *
 *	DirectColor and PseudoColor
 *	    RGB_DEFAULT_MAP
 *	    RGB_BEST_MAP
 *	    RGB_RED_MAP
 *	    RGB_GREEN_MAP
 * 	    RGB_BLUE_MAP
 *          RGB_GRAY_MAP
 *
 *	TrueColor and StaticColor
 *	    RGB_BEST_MAP
 *
 *	GrayScale and StaticGray
 *	    RGB_GRAY_MAP
 */

Status XmuVisualStandardColormaps(dpy, screen, visualid, depth, replace,
				  retain)
    Display		*dpy;		/* specifies server connection */
    int			screen;		/* specifies screen number */
    VisualID		visualid;	/* specifies the visual */
    unsigned int	depth;		/* specifies the visual */
    Bool		replace;	/* specifies whether to replace */
    Bool		retain;		/* specifies whether to retain */
{
    Status		status;
    int			n;
    long		vinfo_mask;
    XVisualInfo		vinfo_template, *vinfo;
        
    vinfo_template.screen = screen;
    vinfo_template.visualid = visualid;
    vinfo_template.depth = depth;
    vinfo_mask = VisualScreenMask | VisualIDMask | VisualDepthMask;
    if ((vinfo = XGetVisualInfo(dpy, vinfo_mask, &vinfo_template, &n)) == NULL)
	return 0;

    if (vinfo->colormap_size <= 2) {
	/* Monochrome visuals have no standard maps; considered successful */
	XFree((char *) vinfo);
	return 1;
    }

    switch (vinfo->class)
    {
      case PseudoColor:
      case DirectColor:
	status = XmuLookupStandardColormap(dpy, screen, visualid, depth,
					   XA_RGB_DEFAULT_MAP, replace,retain);
	if (!status) break;

	status = XmuLookupStandardColormap(dpy, screen, visualid, depth,
					   XA_RGB_GRAY_MAP, replace, retain);
	if (!status) {
	    XmuDeleteStandardColormap(dpy, screen, XA_RGB_DEFAULT_MAP);
	    break;
	}

	status = XmuLookupStandardColormap(dpy, screen, visualid, depth,
					   XA_RGB_RED_MAP, replace, retain);
	if (!status) {
	    XmuDeleteStandardColormap(dpy, screen, XA_RGB_DEFAULT_MAP);
	    XmuDeleteStandardColormap(dpy, screen, XA_RGB_GRAY_MAP);
	    break;
	}

	status = XmuLookupStandardColormap(dpy, screen, visualid, depth,
					   XA_RGB_GREEN_MAP, replace, retain);
	if (!status) {
	    XmuDeleteStandardColormap(dpy, screen, XA_RGB_DEFAULT_MAP);
	    XmuDeleteStandardColormap(dpy, screen, XA_RGB_GRAY_MAP);
	    XmuDeleteStandardColormap(dpy, screen, XA_RGB_RED_MAP);
	    break;
	}

	status = XmuLookupStandardColormap(dpy, screen, visualid, depth,
					   XA_RGB_BLUE_MAP, replace, retain);
	if (!status) {
	    XmuDeleteStandardColormap(dpy, screen, XA_RGB_DEFAULT_MAP);
	    XmuDeleteStandardColormap(dpy, screen, XA_RGB_GRAY_MAP);
	    XmuDeleteStandardColormap(dpy, screen, XA_RGB_RED_MAP);
	    XmuDeleteStandardColormap(dpy, screen, XA_RGB_GREEN_MAP);
	    break;
	}
	/* fall through */

      case StaticColor:
      case TrueColor:

	status = XmuLookupStandardColormap(dpy, screen, visualid, depth,
					   XA_RGB_BEST_MAP, replace, retain);
	if (!status && (vinfo->class == PseudoColor || 
			vinfo->class == DirectColor)) {
	    XmuDeleteStandardColormap(dpy, screen, XA_RGB_DEFAULT_MAP);
	    XmuDeleteStandardColormap(dpy, screen, XA_RGB_GRAY_MAP);
	    XmuDeleteStandardColormap(dpy, screen, XA_RGB_RED_MAP);
	    XmuDeleteStandardColormap(dpy, screen, XA_RGB_GREEN_MAP);
	    XmuDeleteStandardColormap(dpy, screen, XA_RGB_BLUE_MAP);
	}
	break;
	/* the end for PseudoColor, DirectColor, StaticColor, and TrueColor */

      case GrayScale:
	status = XmuLookupStandardColormap(dpy, screen, visualid, depth,
					   XA_RGB_DEFAULT_MAP, replace,
					   retain);
	if (! status) break;
	/* fall through */

      case StaticGray:

	status = XmuLookupStandardColormap(dpy, screen, visualid, depth,
					   XA_RGB_GRAY_MAP, replace, retain);
	if (! status && vinfo->class == GrayScale) {
	    XmuDeleteStandardColormap(dpy, screen, XA_RGB_DEFAULT_MAP);
	    break;
	}
    }

    XFree((char *) vinfo);
    return status;
}