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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 under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* 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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