4 Copyright 1987, 1998 The Open Group
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33 #include <X11/Xlibint.h>
34 #include <X11/Xutil.h>
35 #include "Xatomtype.h"
36 #include <X11/Xatom.h>
38 Status XGetRGBColormaps (
41 XStandardColormap **stdcmap, /* RETURN */
42 int *count, /* RETURN */
43 Atom property) /* XA_RGB_BEST_MAP, etc. */
45 register int i; /* iterator variable */
46 xPropStandardColormap *data = NULL; /* data read in from prop */
47 Atom actual_type; /* how the prop was actually stored */
48 int actual_format; /* ditto */
49 unsigned long leftover; /* how much was left over */
50 unsigned long nitems; /* number of 32bits read */
51 int ncmaps; /* number of structs this makes */
52 Bool old_style = False; /* if was too short */
53 VisualID def_visual = None; /* visual to use if prop too short */
54 XStandardColormap *cmaps; /* return value */
57 if (XGetWindowProperty (dpy, w, property, 0L, 1000000L, False,
58 XA_RGB_COLOR_MAP, &actual_type, &actual_format,
59 &nitems, &leftover, (unsigned char **)&data)
63 /* if wrong type or format, or too small for us, then punt */
64 if ((actual_type != XA_RGB_COLOR_MAP) || (actual_format != 32) ||
65 (nitems < OldNumPropStandardColormapElements)) {
66 if (data) Xfree (data);
71 * See how many properties were found; if pre-ICCCM then assume
72 * default visual and a kill id of 1.
74 if (nitems < NumPropStandardColormapElements) {
77 if (nitems < (NumPropStandardColormapElements - 1)) {
78 Screen *sp = _XScreenOfWindow (dpy, w);
81 if (data) Xfree (data);
84 def_visual = sp->root_visual->visualid;
88 * make sure we have an integral number of colormaps
90 ncmaps = (nitems / NumPropStandardColormapElements);
91 if ((((unsigned long) ncmaps) * NumPropStandardColormapElements) !=
93 if (data) Xfree (data);
102 cmaps = Xmalloc (ncmaps * sizeof (XStandardColormap));
104 if (data) Xfree (data);
110 * and fill it in, handling compatibility with pre-ICCCM short stdcmaps
113 register XStandardColormap *map;
114 register xPropStandardColormap *prop;
116 for (i = ncmaps, map = cmaps, prop = data; i > 0; i--, map++, prop++) {
117 map->colormap = prop->colormap;
118 map->red_max = prop->red_max;
119 map->red_mult = prop->red_mult;
120 map->green_max = prop->green_max;
121 map->green_mult = prop->green_mult;
122 map->blue_max = prop->blue_max;
123 map->blue_mult = prop->blue_mult;
124 map->base_pixel = prop->base_pixel;
125 map->visualid = (def_visual ? def_visual : prop->visualid);
126 map->killid = (old_style ? None : prop->killid);