forked from osmocom/wireshark
154 lines
3.8 KiB
C
154 lines
3.8 KiB
C
/* color_utils.c
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* Toolkit-dependent implementations of routines to handle colors.
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*
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* $Id$
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <string.h>
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#include <gtk/gtk.h>
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#include "../color.h"
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#include "../simple_dialog.h"
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#include "gtk/color_utils.h"
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#include "gtk/gtkglobals.h"
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static GdkColormap* sys_cmap;
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static GdkColormap* our_cmap = NULL;
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GdkColor WHITE = { 0, 65535, 65535, 65535 };
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GdkColor LTGREY = { 0, 57343, 57343, 57343 };
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GdkColor BLACK = { 0, 0, 0, 0 };
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/*
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* Initialize a color with R, G, and B values, including any toolkit-dependent
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* work that needs to be done.
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* Returns TRUE if it succeeds, FALSE if it fails.
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*/
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gboolean
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initialize_color(color_t *color, guint16 red, guint16 green, guint16 blue)
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{
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GdkColor gdk_color;
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gdk_color.red = red;
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gdk_color.green = green;
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gdk_color.blue = blue;
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if (!get_color(&gdk_color))
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return FALSE;
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gdkcolor_to_color_t(color, &gdk_color);
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return TRUE;
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}
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/* Initialize the colors */
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void
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colors_init(void)
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{
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gboolean got_white, got_black;
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sys_cmap = gdk_colormap_get_system();
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/* Allocate "constant" colors. */
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got_white = get_color(&WHITE);
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got_black = get_color(&BLACK);
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/* Got milk? */
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if (!got_white) {
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if (!got_black)
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simple_dialog(ESD_TYPE_WARN, ESD_BTN_OK,
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"Could not allocate colors black or white.");
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else
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simple_dialog(ESD_TYPE_WARN, ESD_BTN_OK,
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"Could not allocate color white.");
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} else {
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if (!got_black)
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simple_dialog(ESD_TYPE_WARN, ESD_BTN_OK,
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"Could not allocate color black.");
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}
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}
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/* allocate a color from the color map */
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gboolean
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get_color(GdkColor *new_color)
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{
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GdkVisual *pv;
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if (!our_cmap) {
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if (!gdk_colormap_alloc_color (sys_cmap, new_color, FALSE,
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TRUE)) {
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pv = gdk_visual_get_best();
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if (!(our_cmap = gdk_colormap_new(pv, TRUE))) {
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simple_dialog(ESD_TYPE_WARN, ESD_BTN_OK,
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"Could not create new colormap");
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}
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} else
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return (TRUE);
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}
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return (gdk_colormap_alloc_color(our_cmap, new_color, FALSE, TRUE));
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}
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void
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color_t_to_gdkcolor(GdkColor *target, const color_t *source)
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{
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target->pixel = source->pixel;
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target->red = source->red;
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target->green = source->green;
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target->blue = source->blue;
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}
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void
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gdkcolor_to_color_t(color_t *target, const GdkColor *source)
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{
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target->pixel = source->pixel;
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target->red = source->red;
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target->green = source->green;
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target->blue = source->blue;
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}
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#if GTK_CHECK_VERSION(2,12,0)
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#else
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/** Copied from GTK sources
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* gdk_color_to_string:
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* @color: a #GdkColor
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*
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* Returns a textual specification of @color in the hexadecimal form
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* <literal>#rrrrggggbbbb</literal>, where <literal>r</literal>,
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* <literal>g</literal> and <literal>b</literal> are hex digits
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* representing the red, green and blue components respectively.
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*
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* Return value: a newly-allocated text string
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*
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* Since: 2.12
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**/
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gchar *
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gdk_color_to_string (const GdkColor *color)
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{
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g_return_val_if_fail (color != NULL, NULL);
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return g_strdup_printf ("#%04x%04x%04x", color->red, color->green, color->blue);
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}
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#endif /* GTK_CHECK_VERSION(2,12,0) */
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