path: root/widgets/misc/e-colors.c

/*
 * e_color.c: General color allocation utilities
 *
 * Author:
 *  Miguel de Icaza (miguel@kernel.org)
 *
 * We keep our own color context, as the color allocation might take place
 * before things are realized.
 */
#include <config.h>
#include <gtk/gtkwidget.h>
#include "e-colors.h"

static gboolean e_color_inited;
static GdkColorContext *e_color_context;

GdkColor e_white, e_dark_gray, e_black;

int 
e_color_alloc (gushort red, gushort green, gushort blue)
{
    int failed;
    
    if (!e_color_inited)
        e_color_init ();
    
    return gdk_color_context_get_pixel (e_color_context,
                        red, green, blue, &failed);
}

void
e_color_alloc_gdk (GdkColor *c)
{
    int failed;
    
    g_return_if_fail (c != NULL);
    
    if (!e_color_inited)
        e_color_init ();
    
    c->pixel = gdk_color_context_get_pixel (e_color_context, c->red, c->green, c->blue, &failed);
}

void
e_color_alloc_name (const char *name, GdkColor *c)
{
    int failed;
    
    g_return_if_fail (name != NULL);
    g_return_if_fail (c != NULL);

    if (!e_color_inited)
        e_color_init ();
    
    gdk_color_parse (name, c);
    c->pixel = 0;
    c->pixel = gdk_color_context_get_pixel (e_color_context, c->red, c->green, c->blue, &failed);
}

void
e_color_init (void)
{
    GdkColormap *colormap;

    /* It's surprisingly easy to end up calling this twice.  Survive.  */
    if (e_color_inited)
        return;

    colormap = gtk_widget_get_default_colormap ();

    /* Initialize the color context */
    e_color_context = gdk_color_context_new (
        gtk_widget_get_default_visual (), colormap);

    e_color_inited = TRUE;

    /* Allocate the default colors */
    gdk_color_white (colormap, &e_white);
    gdk_color_black (colormap, &e_black);
    e_color_alloc_name ("gray20",  &e_dark_gray);
}