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/*
* Copyright © 2005 Keith Packard
*
* 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 Keith Packard
*
* Contributor(s):
* Keith Packard <keithp@keithp.com>
*/
/*
* Generate LED images for rocketview and launchcontrol
*/
autoimport Cairo;
void led (cairo_t cr, real red, real green, real blue, bool on)
{
translate (cr, .5, .5);
/* basic unilluminated LED */
if (true)
{
set_source_rgb (cr, red *.4, green *.4, blue *.4);
move_to (cr, 1, 1/2);
arc (cr, .5, .5, .5, 0, pi*2);
fill (cr);
}
/* Bright spot of LED illumination */
if (on)
{
pattern_t led = Pattern::create_radial (1/2, 1/2, 0,
1/2, 1/2, .4);
Pattern::add_color_stop_rgba (led, 0, red, green, blue, 1);
Pattern::add_color_stop_rgba (led, .5, red, green, blue, .8);
Pattern::add_color_stop_rgba (led, 1, red, green, blue, 0);
set_source (cr, led);
move_to (cr, 1, 1/2);
arc (cr, .5, .5, .5, 0, pi*2);
fill (cr);
}
/* Bezel */
if (true)
{
pattern_t ring = Pattern::create_radial (.5, .5, .4, .5, .5, .5);
Pattern::add_color_stop_rgba (ring, 0, 0, 0, 0, 1);
Pattern::add_color_stop_rgba (ring, .5, 0, 0, 0, 1);
Pattern::add_color_stop_rgba (ring, 1, .5, .5, .5, 1);
set_source (cr, ring);
move_to (cr, 1, 1/2);
arc (cr, .5, .5, .5, 0, pi*2);
move_to (cr, 1, 1/2);
arc_negative (cr, .5, .5, .45, pi*2, 0);
fill (cr);
}
/* Specular highlight from room illumination */
if (true)
{
pattern_t room = Pattern::create_radial (1/3, 1/3, 0, 1/3, 1/3, 1/2);
Pattern::add_color_stop_rgba (room, 0, 1, 1, 1, .4);
Pattern::add_color_stop_rgba (room, 1, 1, 1, 1, 0);
set_source (cr, room);
move_to (cr, 1, 1/2);
arc (cr, .5, .5, .5, 0, pi*2);
fill (cr);
}
}
/*
* Desired LED image size in pixels
*/
int diameter = 12;
void do_one (string name, real red, real green, real blue, bool on)
{
cairo_t cr = new_image (diameter, diameter);
translate (cr, -width(cr)/2, -height(cr)/2);
scale (cr, width(cr), height(cr));
led (cr, red, green, blue, on);
write_to_png (cr, name);
destroy (cr);
}
void doit ()
{
do_one ("redled.png", 1, 0, 0, true);
do_one ("redoff.png", 1, 0, 0, false);
do_one ("greenled.png", 0, 1, .4824, true);
do_one ("greenoff.png", 0, 1, .4824, false);
do_one ("grayled.png", .9, .9, .9, false);
do_one ("grayon.png", .9, .9, .9, true);
}
if (dim(argv) > 0)
doit ();
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