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themes: convert colorscheme.c to Perl

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Lucas 2020-12-06 15:08:37 +00:00
parent e71a6eb321
commit 54a7ab5e6e
3 changed files with 183 additions and 210 deletions
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#!/usr/bin/env perl
# colorscheme.pl
#
# Written in 2020 by Lucas
#
# To the extent possible under law, the author(s) have dedicated all
# copyright and related and neighboring rights to this software to the
# public domain worldwide. This software is distributed without any
# warranty.
#
# You should have received a copy of the CC0 Public Domain Dedication
# along with this software. If not, see
# <http://creativecommons.org/publicdomain/zero/1.0/>.
use v5.12;
use strict;
use warnings;
use Getopt::Std;
use POSIX qw(fmod);
use constant {
LENGTH => 50,
};
my $progname = $0;
$progname =~ s@.*/@@;
sub err (@)
{
say STDERR "$progname: @_";
exit 1;
}
sub usage ()
{
say STDERR "Usage: $progname [-i]";
exit 1;
}
sub validhsv ($$$)
{
my ($h, $s, $v) = @_;
return $h >= 0.0 && $h <= 360.0 && $s >= 0.0 && $s <= 1.0 &&
$v >= 0.0 && $v <= 1.0;
}
sub validhsl ($$$)
{
my ($h, $s, $l) = @_;
return $h >= 0.0 && $h <= 360.0 && $s >= 0.0 && $s <= 1.0 &&
$l >= 0.0 && $l <= 1.0;
}
sub validrgb ($$$)
{
my ($r, $g, $b) = @_;
return $r >= 0 && $r <= 255 && $g >= 0 && $g <= 255 &&
$b >= 0 && $b <= 255;
}
sub validrgbhex ($$$)
{
my ($r, $g, $b) = @_;
return $r =~ /^[0-9A-Fa-f]{2}$/ && $g =~ /^[0-9A-Fa-f]{2}$/ &&
$b =~ /^[0-9A-Fa-f]{2}$/;
}
sub hsvtorgb ($$$)
{
my ($h, $s, $v) = @_;
my $c = $s * $v;
my $hh = $h == 360.0 ? 0.0 : $h / 60.0;
my $x = $c * (1.0 - abs(fmod($hh, 2.0) - 1.0));
my ($r, $g, $b);
for (int($hh)) {
($r, $g, $b) = ($c, $x, 0) if $_ == 0;
($r, $g, $b) = ($x, $c, 0) if $_ == 1;
($r, $g, $b) = (0, $c, $x) if $_ == 2;
($r, $g, $b) = (0, $x, $c) if $_ == 3;
($r, $g, $b) = ($x, 0, $c) if $_ == 4;
($r, $g, $b) = ($c, 0, $x) if $_ == 5;
}
my $m = $v - $c;
return map {255 * ($_ + $m)} $r, $g, $b;
}
sub hsltorgb ($$$)
{
my ($h, $s, $l) = @_;
my $c = (1.0 - abs(2.0 * $l - 1.0)) * $s;
my $hh = $h == 360.0 ? 0.0 : $h / 60.0;
my $x = $c * (1.0 - abs(fmod($hh, 2.0) - 1.0));
my ($r, $g, $b);
for (int($hh)) {
($r, $g, $b) = ($c, $x, 0) if $_ == 0;
($r, $g, $b) = ($x, $c, 0) if $_ == 1;
($r, $g, $b) = (0, $c, $x) if $_ == 2;
($r, $g, $b) = (0, $x, $c) if $_ == 3;
($r, $g, $b) = ($x, 0, $c) if $_ == 4;
($r, $g, $b) = ($c, 0, $x) if $_ == 5;
}
my $m = $l - $c / 2.0;
return map {255 * ($_ + $m)} $r, $g, $b;
}
sub parseinput ()
{
my @colors;
while (my $line = <STDIN>) {
chomp $line;
next if $line =~ /^#|^$/;
my ($t, $x, $y, $z, undef) = split(/\s+/, $line, 5);
my @v;
if ($t eq "hsv") {
die "invalid input: $line" unless validhsv($x, $y, $z);
@v = map {int} hsvtorgb($x, $y, $z);
} elsif ($t eq "hsl") {
die "invalid input: $line" unless validhsl($x, $y, $z);
@v = map {int} hsltorgb($x, $y, $z);
} elsif ($t eq "rgb") {
die "invalid input: $line" unless validrgb($x, $y, $z);
@v = map {int} ($x, $y, $z);
} elsif ($t eq "rgbhex") {
die "invalid input: $line"
unless validrgbhex($x, $y, $z);
@v = map {hex} ($x, $y, $z);
} else {
die "invalid input: $line";
}
push(@colors, \@v);
}
return @colors;
}
sub main ()
{
my %opts;
getopts("i", \%opts) or usage;
my @colors = parseinput();
if (defined($opts{"i"})) {
err "Colorscheme doesn't have 18 colors"
if scalar(@colors) != 18;
printf "P6\n%u %u 255\n", 9 * LENGTH, 2 * LENGTH;
for (0..LENGTH - 1) {
for (0..8) {
print pack("CCC", @{$colors[$_]}) x LENGTH;
}
}
for (0..LENGTH - 1) {
for (9..17) {
print pack("CCC", @{$colors[$_]}) x LENGTH;
}
}
} else {
foreach (@colors) {
say "#", (map {sprintf "%02x", $_} @$_);
}
}
}
main();