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/*
* Copyright © 2018 Keith Packard <keithp@keithp.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program 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
* General Public License for more details.
*/
/*
* 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_svg (string name, real red, real green, real blue, bool on)
{
cairo_t cr = new_svg (name, diameter, diameter);
translate (cr, -width(cr)/2, -height(cr)/2);
scale (cr, width(cr), height(cr));
led (cr, red, green, blue, on);
destroy (cr);
}
void do_one_png (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 do_one(string name, real red, real green, real blue, bool on)
{
do_one_png(name + ".png", red, green, blue, on);
do_one_svg(name + ".svg", red, green, blue, on);
}
void doit ()
{
do_one ("redled", 1, 0, 0, true);
do_one ("redoff", 1, 0, 0, false);
do_one ("greenled", 0, 1, .4824, true);
do_one ("greenoff", 0, 1, .4824, false);
do_one ("grayled", .9, .9, .9, false);
do_one ("grayon", .9, .9, .9, true);
}
typedef struct {
real red, green, blue;
bool on;
} stock_t;
stock_t[string] stock_leds = {
"redled" => {
.red = 1,
.green = 0,
.blue = 0,
.on = true
},
"redoff" => {
.red = 1,
.green = 0,
.blue = 0,
.on = false
},
"greenled" => {
.red = 0,
.green = 1,
.blue = .4824,
.on = true
},
"greenoff" => {
.red = 0,
.green = 1,
.blue = .4824,
.on = false
},
"grayon" => {
.red = .9,
.green = .9,
.blue = .9,
.on = true
},
"grayled" => {
.red = .9,
.green = .9,
.blue = .9,
.on = false
},
};
void main ()
{
for (int i = 1; i < dim(argv); i++) {
string name = argv[i];
string[] bits = String::split(name, ".");
if (dim(bits) != 2) {
File::fprintf(stderr, "Filename is weird: \"%s\"\n", argv[i]);
exit (1);
}
stock_t stock = stock_leds[bits[0]];
switch (bits[1]) {
case "png":
do_one_png(argv[i], stock.red, stock.green, stock.blue, stock.on);
break;
case "svg":
do_one_svg(argv[i], stock.red, stock.green, stock.blue, stock.on);
break;
}
}
}
if (dim(argv) > 0) {
main();
}
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