ui/gtk/color_utils.c

   1 /* color_utils.c
   2  * Toolkit-dependent implementations of routines to handle 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  23  */
  24
  25 #include "config.h"
  26
  27 #include <string.h>
  28
  29 #include <gtk/gtk.h>
  30
  31 #include "../color.h"
  32
  33 #include "ui/simple_dialog.h"
  34
  35 #include "ui/gtk/gui_utils.h"
  36 #include "ui/gtk/color_utils.h"
  37 #include "ui/gtk/gtkglobals.h"
  38 #if 0
  39 static GdkColormap*     sys_cmap;
  40 static GdkColormap*     our_cmap = NULL;
  41 #endif
  42 GdkColor        WHITE = { 0, 65535, 65535, 65535 };
  43 /*GdkColor      LTGREY = { 0, 57343, 57343, 57343 };*/
  44 GdkColor        BLACK = { 0, 0, 0, 0 };
  45
  46 /*
  47  * Initialize a color with R, G, and B values, including any toolkit-dependent
  48  * work that needs to be done.
  49  * Returns TRUE if it succeeds, FALSE if it fails.
  50  */
  51 gboolean
  52 initialize_color(color_t *color, guint16 red, guint16 green, guint16 blue)
  53 {
  54         GdkColor gdk_color;
  55
  56         gdk_color.pixel = 0;
  57         gdk_color.red = red;
  58         gdk_color.green = green;
  59         gdk_color.blue = blue;
  60 #if 0
  61         if (!get_color(&gdk_color))
  62                 return FALSE;
  63 #endif
  64         gdkcolor_to_color_t(color, &gdk_color);
  65         return TRUE;
  66 }
  67
  68 /* Initialize the colors */
  69 void
  70 colors_init(void)
  71 {
  72 #if 0
  73         gboolean got_white, got_black;
  74
  75         sys_cmap = gdk_colormap_get_system();
  76
  77         /* Allocate "constant" colors. */
  78         got_white = get_color(&WHITE);
  79         got_black = get_color(&BLACK);
  80         /* Got milk? */
  81         if (!got_white) {
  82                 if (!got_black)
  83                         simple_dialog(ESD_TYPE_WARN, ESD_BTN_OK,
  84                                 "Could not allocate colors black or white.");
  85                 else
  86                         simple_dialog(ESD_TYPE_WARN, ESD_BTN_OK,
  87                                 "Could not allocate color white.");
  88         } else {
  89                 if (!got_black)
  90                         simple_dialog(ESD_TYPE_WARN, ESD_BTN_OK,
  91                                 "Could not allocate color black.");
  92         }
  93 #endif
  94
  95 }
  96 #if 0
  97 /* allocate a color from the color map */
  98 gboolean
  99 get_color(GdkColor *new_color)
 100 {
 101         GdkVisual *pv;
 102
 103         if (!our_cmap) {
 104                 if (!gdk_colormap_alloc_color (sys_cmap, new_color, FALSE,
 105                         TRUE)) {
 106                         pv = gdk_visual_get_best();
 107                         if (!(our_cmap = gdk_colormap_new(pv, TRUE))) {
 108                                 simple_dialog(ESD_TYPE_WARN, ESD_BTN_OK,
 109                                         "Could not create new colormap");
 110                         }
 111                 } else
 112                         return (TRUE);
 113         }
 114         return (gdk_colormap_alloc_color(our_cmap, new_color, FALSE, TRUE));
 115 }
 116 #endif
 117
 118 void
 119 color_t_to_gdkcolor(GdkColor *target, const color_t *source)
 120 {
 121         target->pixel = source->pixel;
 122         target->red   = source->red;
 123         target->green = source->green;
 124         target->blue  = source->blue;
 125 }
 126
 127 void
 128 color_t_to_gdkRGBAcolor(GdkRGBA *target, const color_t *source)
 129 {
 130         target->alpha = 1;
 131         target->red   = source->red / 65535.0;
 132         target->green = source->green / 65535.0;
 133         target->blue  = source->blue / 65535.0;
 134 }
 135 void
 136 gdkcolor_to_color_t(color_t *target, const GdkColor *source)
 137 {
 138         target->pixel = source->pixel;
 139         target->red   = source->red;
 140         target->green = source->green;
 141         target->blue  = source->blue;
 142 }
 143
 144 void
 145 gdkRGBAcolor_to_color_t(color_t *target, const GdkRGBA *source)
 146 {
 147         target->pixel = 0;
 148         target->red   = (guint16)(source->red*65535);
 149         target->green = (guint16)(source->green*65535);
 150         target->blue  = (guint16)(source->blue*65535);
 151 }
 152
 153
 154 void
 155 GdkColor_to_GdkRGBA(GdkRGBA *target, const GdkColor *source)
 156 {
 157         target->alpha = 1;
 158         target->red   = (double)source->red / 65535.0;
 159         target->green = (double)source->green / 65535.0;
 160         target->blue  = (double)source->blue / 65535.0;
 161 }
 162
 163 void
 164 gdkRGBAcolor_to_GdkColor(GdkColor *target, const GdkRGBA *source)
 165 {
 166         target->pixel = 0;
 167         target->red   = (guint16)(source->red*65535);
 168         target->green = (guint16)(source->green*65535);
 169         target->blue  = (guint16)(source->blue*65535);
 170 }
 171