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/* cairo - a vector graphics library with display and print output
*
* Copyright © 2002 University of Southern California
*
* This library is free software; you can redistribute it and/or
* modify it either under the terms of the GNU Lesser General Public
* License version 2.1 as published by the Free Software Foundation
* (the "LGPL") or, at your option, under the terms of the Mozilla
* Public License Version 1.1 (the "MPL"). If you do not alter this
* notice, a recipient may use your version of this file under either
* the MPL or the LGPL.
*
* You should have received a copy of the LGPL along with this library
* in the file COPYING-LGPL-2.1; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
* You should have received a copy of the MPL along with this library
* in the file COPYING-MPL-1.1
*
* The contents of this file are subject to the Mozilla Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
* OF ANY KIND, either express or implied. See the LGPL or the MPL for
* the specific language governing rights and limitations.
*
* The Original Code is the cairo graphics library.
*
* The Initial Developer of the Original Code is University of Southern
* California.
*
* Contributor(s):
* Carl D. Worth <cworth@cworth.org>
*/
#include "cairoint.h"
static cairo_color_t const CAIRO_COLOR_WHITE = {
1.0, 1.0, 1.0, 1.0,
0xffff, 0xffff, 0xffff, 0xffff
};
static void
_cairo_color_compute_shorts (cairo_color_t *color);
void
_cairo_color_init (cairo_color_t *color)
{
*color = CAIRO_COLOR_WHITE;
}
void
_cairo_color_fini (cairo_color_t *color)
{
/* Nothing to do here */
}
void
_cairo_color_set_rgb (cairo_color_t *color, double red, double green, double blue)
{
color->red = red;
color->green = green;
color->blue = blue;
_cairo_color_compute_shorts (color);
}
void
_cairo_color_get_rgb (const cairo_color_t *color,
double *red, double *green, double *blue)
{
if (red)
*red = color->red;
if (green)
*green = color->green;
if (blue)
*blue = color->blue;
}
void
_cairo_color_set_alpha (cairo_color_t *color, double alpha)
{
color->alpha = alpha;
_cairo_color_compute_shorts (color);
}
static void
_cairo_color_compute_shorts (cairo_color_t *color)
{
color->red_short = (color->red * color->alpha) * 0xffff;
color->green_short = (color->green * color->alpha) * 0xffff;
color->blue_short = (color->blue * color->alpha) * 0xffff;
color->alpha_short = color->alpha * 0xffff;
}
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