ui/gtk/color_utils.c

   1 /* color_utils.c
   2  * Toolkit-dependent implementations of routines to handle colors.
   3  *
   4  * Wireshark - Network traffic analyzer
   5  * By Gerald Combs <gerald@wireshark.org>
   6  * Copyright 1998 Gerald Combs
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License
  10  * as published by the Free Software Foundation; either version 2
  11  * of the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  21  */
  22
  23 #include "config.h"
  24
  25 #include <string.h>
  26
  27 #include <gtk/gtk.h>
  28
  29 #include "../color.h"
  30
  31
  32 #include "ui/gtk/color_utils.h"
  33 #if 0
  34 static GdkColormap*     sys_cmap;
  35 static GdkColormap*     our_cmap = NULL;
  36 #endif
  37 GdkColor        WHITE = { 0, 65535, 65535, 65535 };
  38 /*GdkColor      LTGREY = { 0, 57343, 57343, 57343 };*/
  39 GdkColor        BLACK = { 0, 0, 0, 0 };
  40
  41 /*
  42  * Initialize a color with R, G, and B values, including any toolkit-dependent
  43  * work that needs to be done.
  44  * Returns TRUE if it succeeds, FALSE if it fails.
  45  */
  46 gboolean
  47 initialize_color(color_t *color, guint16 red, guint16 green, guint16 blue)
  48 {
  49         GdkColor gdk_color;
  50
  51         gdk_color.pixel = 0;
  52         gdk_color.red = red;
  53         gdk_color.green = green;
  54         gdk_color.blue = blue;
  55 #if 0
  56         if (!get_color(&gdk_color))
  57                 return FALSE;
  58 #endif
  59         gdkcolor_to_color_t(color, &gdk_color);
  60         return TRUE;
  61 }
  62
  63 /* Initialize the colors */
  64 void
  65 colors_init(void)
  66 {
  67 #if 0
  68         gboolean got_white, got_black;
  69
  70         sys_cmap = gdk_colormap_get_system();
  71
  72         /* Allocate "constant" colors. */
  73         got_white = get_color(&WHITE);
  74         got_black = get_color(&BLACK);
  75         /* Got milk? */
  76         if (!got_white) {
  77                 if (!got_black)
  78                         simple_dialog(ESD_TYPE_WARN, ESD_BTN_OK,
  79                                 "Could not allocate colors black or white.");
  80                 else
  81                         simple_dialog(ESD_TYPE_WARN, ESD_BTN_OK,
  82                                 "Could not allocate color white.");
  83         } else {
  84                 if (!got_black)
  85                         simple_dialog(ESD_TYPE_WARN, ESD_BTN_OK,
  86                                 "Could not allocate color black.");
  87         }
  88 #endif
  89
  90 }
  91 #if 0
  92 /* allocate a color from the color map */
  93 gboolean
  94 get_color(GdkColor *new_color)
  95 {
  96         GdkVisual *pv;
  97
  98         if (!our_cmap) {
  99                 if (!gdk_colormap_alloc_color (sys_cmap, new_color, FALSE,
 100                         TRUE)) {
 101                         pv = gdk_visual_get_best();
 102                         if (!(our_cmap = gdk_colormap_new(pv, TRUE))) {
 103                                 simple_dialog(ESD_TYPE_WARN, ESD_BTN_OK,
 104                                         "Could not create new colormap");
 105                         }
 106                 } else
 107                         return (TRUE);
 108         }
 109         return (gdk_colormap_alloc_color(our_cmap, new_color, FALSE, TRUE));
 110 }
 111 #endif
 112
 113 void
 114 color_t_to_gdkcolor(GdkColor *target, const color_t *source)
 115 {
 116         target->pixel = source->pixel;
 117         target->red   = source->red;
 118         target->green = source->green;
 119         target->blue  = source->blue;
 120 }
 121
 122 void
 123 color_t_to_gdkRGBAcolor(GdkRGBA *target, const color_t *source)
 124 {
 125         target->alpha = 1;
 126         target->red   = source->red / 65535.0;
 127         target->green = source->green / 65535.0;
 128         target->blue  = source->blue / 65535.0;
 129 }
 130 void
 131 gdkcolor_to_color_t(color_t *target, const GdkColor *source)
 132 {
 133         target->pixel = source->pixel;
 134         target->red   = source->red;
 135         target->green = source->green;
 136         target->blue  = source->blue;
 137 }
 138
 139 void
 140 gdkRGBAcolor_to_color_t(color_t *target, const GdkRGBA *source)
 141 {
 142         target->pixel = 0;
 143         target->red   = (guint16)(source->red*65535);
 144         target->green = (guint16)(source->green*65535);
 145         target->blue  = (guint16)(source->blue*65535);
 146 }
 147
 148
 149 void
 150 GdkColor_to_GdkRGBA(GdkRGBA *target, const GdkColor *source)
 151 {
 152         target->alpha = 1;
 153         target->red   = (double)source->red / 65535.0;
 154         target->green = (double)source->green / 65535.0;
 155         target->blue  = (double)source->blue / 65535.0;
 156 }
 157
 158 void
 159 gdkRGBAcolor_to_GdkColor(GdkColor *target, const GdkRGBA *source)
 160 {
 161         target->pixel = 0;
 162         target->red   = (guint16)(source->red*65535);
 163         target->green = (guint16)(source->green*65535);
 164         target->blue  = (guint16)(source->blue*65535);
 165 }
 166