134 lines
4.1 KiB
C
134 lines
4.1 KiB
C
/* $Xorg: GetRGBCMap.c,v 1.4 2001/02/09 02:03:33 xorgcvs Exp $ */
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/*
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Copyright 1987, 1998 The Open Group
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Permission to use, copy, modify, distribute, and sell this software and its
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documentation for any purpose is hereby granted without fee, provided that
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the above copyright notice appear in all copies and that both that
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copyright notice and this permission notice appear in supporting
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documentation.
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The above copyright notice and this permission notice shall be included
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in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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IN NO EVENT SHALL THE OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR
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OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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OTHER DEALINGS IN THE SOFTWARE.
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Except as contained in this notice, the name of The Open Group shall
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not be used in advertising or otherwise to promote the sale, use or
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other dealings in this Software without prior written authorization
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from The Open Group.
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*/
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#include <X11/Xlibint.h>
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#include <X11/Xutil.h>
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#include "Xatomtype.h"
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#include <X11/Xatom.h>
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Status XGetRGBColormaps (dpy, w, stdcmap, count, property)
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Display *dpy;
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Window w;
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XStandardColormap **stdcmap; /* RETURN */
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int *count; /* RETURN */
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Atom property; /* XA_RGB_BEST_MAP, etc. */
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{
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register int i; /* iterator variable */
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xPropStandardColormap *data = NULL; /* data read in from prop */
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Atom actual_type; /* how the prop was actually stored */
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int actual_format; /* ditto */
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unsigned long leftover; /* how much was left over */
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unsigned long nitems; /* number of 32bits read */
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int ncmaps; /* number of structs this makes */
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Bool old_style = False; /* if was too short */
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VisualID def_visual = None; /* visual to use if prop too short */
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XStandardColormap *cmaps; /* return value */
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if (XGetWindowProperty (dpy, w, property, 0L, 1000000L, False,
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XA_RGB_COLOR_MAP, &actual_type, &actual_format,
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&nitems, &leftover, (unsigned char **)&data)
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!= Success)
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return False;
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/* if wrong type or format, or too small for us, then punt */
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if ((actual_type != XA_RGB_COLOR_MAP) || (actual_format != 32) ||
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(nitems < OldNumPropStandardColormapElements)) {
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if (data) Xfree ((char *) data);
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return False;
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}
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/*
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* See how many properties were found; if pre-ICCCM then assume
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* default visual and a kill id of 1.
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*/
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if (nitems < NumPropStandardColormapElements) {
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ncmaps = 1;
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old_style = True;
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if (nitems < (NumPropStandardColormapElements - 1)) {
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Screen *sp = _XScreenOfWindow (dpy, w);
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if (!sp) {
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if (data) Xfree ((char *) data);
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return False;
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}
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def_visual = sp->root_visual->visualid;
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}
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} else {
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/*
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* make sure we have an integral number of colormaps
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*/
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ncmaps = (nitems / NumPropStandardColormapElements);
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if ((((unsigned long) ncmaps) * NumPropStandardColormapElements) !=
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nitems) {
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if (data) Xfree ((char *) data);
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return False;
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}
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}
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/*
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* allocate array
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*/
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cmaps = (XStandardColormap *) Xmalloc (ncmaps *
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sizeof (XStandardColormap));
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if (!cmaps) {
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if (data) Xfree ((char *) data);
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return False;
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}
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/*
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* and fill it in, handling compatibility with pre-ICCCM short stdcmaps
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*/
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{
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register XStandardColormap *map;
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register xPropStandardColormap *prop;
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for (i = ncmaps, map = cmaps, prop = data; i > 0; i--, map++, prop++) {
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map->colormap = prop->colormap;
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map->red_max = prop->red_max;
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map->red_mult = prop->red_mult;
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map->green_max = prop->green_max;
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map->green_mult = prop->green_mult;
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map->blue_max = prop->blue_max;
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map->blue_mult = prop->blue_mult;
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map->base_pixel = prop->base_pixel;
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map->visualid = (def_visual ? def_visual : prop->visualid);
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map->killid = (old_style ? None : prop->killid);
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}
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}
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Xfree ((char *) data);
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*stdcmap = cmaps;
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*count = ncmaps;
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return True;
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}
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