gtk/colors.c

   1 /* colors.c
   2  * Routines for colors
   3  *
   4  * $Id$
   5  *
   6  * Wireshark - Network traffic analyzer
   7  * By Gerald Combs <gerald@wireshark.org>
   8  * Copyright 1998 Gerald Combs
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License
  12  * as published by the Free Software Foundation; either version 2
  13  * of the License, or (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  23  */
  24 #ifdef HAVE_CONFIG_H
  25 # include "config.h"
  26 #endif
  27
  28 #include <gtk/gtk.h>
  29
  30 #include <string.h>
  31
  32 #include "color.h"      /* to declare "color_t" */
  33
  34 #include "colors.h"
  35 #include "simple_dialog.h"
  36 #include "gtkglobals.h"
  37
  38 static GdkColormap*     sys_cmap;
  39 static GdkColormap*     our_cmap = NULL;
  40
  41 GdkColor        WHITE = { 0, 65535, 65535, 65535 };
  42 GdkColor        LTGREY = { 0, 57343, 57343, 57343 };
  43 GdkColor        BLACK = { 0, 0, 0, 0 };
  44
  45 /* Initialize the colors */
  46 void
  47 colors_init(void)
  48 {
  49         gboolean got_white, got_black;
  50
  51         sys_cmap = gdk_colormap_get_system();
  52
  53         /* Allocate "constant" colors. */
  54         got_white = get_color(&WHITE);
  55         got_black = get_color(&BLACK);
  56
  57         /* Got milk? */
  58         if (!got_white) {
  59                 if (!got_black)
  60                         simple_dialog(ESD_TYPE_WARN, ESD_BTN_OK,
  61                             "Could not allocate colors black or white.");
  62                 else
  63                         simple_dialog(ESD_TYPE_WARN, ESD_BTN_OK,
  64                             "Could not allocate color white.");
  65         } else {
  66                 if (!got_black)
  67                         simple_dialog(ESD_TYPE_WARN, ESD_BTN_OK,
  68                             "Could not allocate color black.");
  69         }
  70 }
  71
  72 /* allocate a color from the color map */
  73 gboolean
  74 get_color(GdkColor *new_color)
  75 {
  76         GdkVisual *pv;
  77
  78         if (!our_cmap) {
  79                 if (!gdk_colormap_alloc_color (sys_cmap, new_color, FALSE,
  80                     TRUE)) {
  81                         pv = gdk_visual_get_best();
  82                         if (!(our_cmap = gdk_colormap_new(pv, TRUE))) {
  83                                 simple_dialog(ESD_TYPE_WARN, ESD_BTN_OK,
  84                                     "Could not create new colormap");
  85                         }
  86                 } else
  87                         return (TRUE);
  88         }
  89         return (gdk_colormap_alloc_color(our_cmap, new_color, FALSE, TRUE));
  90 }
  91
  92 void
  93 color_t_to_gdkcolor(GdkColor *target, color_t *source)
  94 {
  95         target->pixel = source->pixel;
  96         target->red   = source->red;
  97         target->green = source->green;
  98         target->blue  = source->blue;
  99 }
 100
 101 void
 102 gdkcolor_to_color_t(color_t *target, GdkColor *source)
 103 {
 104         target->pixel = source->pixel;
 105         target->red   = source->red;
 106         target->green = source->green;
 107         target->blue  = source->blue;
 108 }