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/*
* Copyright © 2002 University of Southern California
*
* Permission to use, copy, modify, distribute, and sell this software
* and its documentation for any purpose is hereby granted without
* fee, provided that the above copyright notice appear in all copies
* and that both that copyright notice and this permission notice
* appear in supporting documentation, and that the name of the
* University of Southern California not be used in advertising or
* publicity pertaining to distribution of the software without
* specific, written prior permission. The University of Southern
* California makes no representations about the suitability of this
* software for any purpose. It is provided "as is" without express
* or implied warranty.
*
* THE UNIVERSITY OF SOUTHERN CALIFORNIA DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL THE UNIVERSITY OF
* SOUTHERN CALIFORNIA BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
* OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
* NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Author: Carl D. Worth <cworth@isi.edu>
*/
#include "cairoint.h"
static cairo_color_t const CAIRO_COLOR_DEFAULT = {
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_DEFAULT;
}
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 (cairo_color_t *color, double *red, double *green, double *blue)
{
*red = color->red;
*green = color->green;
*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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