components/x11/xcolor/src/XCrDynCmap.c

   1 /*-
   2  * XCrDynCmap.c - X11 library routine to create dynamic colormaps.
   3  *
   4  * Copyright (c) 1990, 2011, Oracle and/or its affiliates. All rights reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the next
  14  * paragraph) shall be included in all copies or substantial portions of the
  15  * Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  22  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  23  * DEALINGS IN THE SOFTWARE.
  24  *
  25  * Author: Patrick J. Naughton
  26  * naughton@sun.com
  27  */
  28
  29
  30 #include <X11/X.h>
  31 #include <X11/Xos.h>
  32 #include <X11/Xlib.h>
  33 #include <X11/Xutil.h>
  34 #include "xcolor.h"
  35
  36 Status
  37 XCreateDynamicColormap(
  38     Display    *dsp,
  39     int         screen,
  40     Colormap   *cmap,           /* return */
  41     Visual    **visual,         /* return */
  42     XColor     *colors,
  43     int         count,
  44     u_char     *red,
  45     u_char     *green,
  46     u_char     *blue)
  47 {
  48     XVisualInfo vinfo;
  49     unsigned long pixels[256];
  50     int         i,
  51                 ncolors,
  52                 planes;
  53     unsigned long pmasks;
  54     Status      allocReturn;
  55
  56     planes = DisplayPlanes(dsp, screen);
  57     if (!XMatchVisualInfo(dsp, screen, planes, PseudoColor, &vinfo))
  58         if (!XMatchVisualInfo(dsp, screen, planes, GrayScale, &vinfo))
  59             if (!XMatchVisualInfo(dsp, screen, planes, DirectColor, &vinfo))
  60                 return BadMatch;
  61
  62     {
  63         *visual = vinfo.visual;
  64         *cmap = XCreateColormap(dsp, RootWindow(dsp, screen),
  65                                 *visual, AllocNone);
  66         ncolors = vinfo.colormap_size;
  67
  68         if (count > ncolors)
  69             return BadValue;
  70
  71         allocReturn = XAllocColorCells(dsp, *cmap,
  72                                        False, &pmasks, 0,
  73                                        pixels, ncolors);
  74
  75 /*      This should return Success, but it doesn't... Xlib bug?
  76  *      (I'll ignore the return value for now...)
  77  */
  78 #ifdef NOTDEF
  79         if (allocReturn != Success)
  80             return allocReturn;
  81 #endif                          /* NOTDEF */
  82
  83         for (i = 0; i < ncolors - count; i++) {
  84             colors[i].pixel = pixels[i];
  85             XQueryColor(dsp, DefaultColormap(dsp, screen), &colors[i]);
  86         }
  87         for (i = ncolors - count; i < ncolors; i++) {
  88             colors[i].pixel = pixels[i];
  89             colors[i].red = *red++ << 8;
  90             colors[i].green = *green++ << 8;
  91             colors[i].blue = *blue++ << 8;
  92             colors[i].flags = DoRed | DoGreen | DoBlue;
  93         }
  94         XStoreColors(dsp, *cmap, colors, ncolors);
  95         return Success;
  96     }
  97 }