Bitmap/Read an image through a pipe: Difference between revisions
Rename Perl 6 -> Raku, alphabetize, minor clean-up
(Python version using Pillow) |
Thundergnat (talk | contribs) (Rename Perl 6 -> Raku, alphabetize, minor clean-up) |
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(img)
;;</lang>
=={{header|Perl 6}}==▼
{{works with|Rakudo|2017.09}}▼
Uses pieces from [[Bitmap#Perl_6| Bitmap]] and [[Bitmap/Read_a_PPM_file#Perl_6| Read a PPM file]] tasks. Included here to make a complete, runnable program.▼
Uses imagemagick convert to pipe the image in. ▼
<lang perl6>class Pixel { has UInt ($.R, $.G, $.B) }▼
class Bitmap {▼
has UInt ($.width, $.height);▼
has Pixel @.data;▼
}▼
role PPM {▼
method P6 returns Blob {▼
"P6\n{self.width} {self.height}\n255\n".encode('ascii')▼
~ Blob.new: flat map { .R, .G, .B }, self.data▼
}▼
}▼
sub getline ( $proc ) {▼
my $line = '#'; # skip comment when reading a .png▼
$line = $proc.out.get while $line.substr(0,1) eq '#';▼
$line;▼
}▼
my $filename = './camelia.png';▼
my $proc = run 'convert', $filename, 'ppm:-', :enc('ISO-8859-1'), :out;▼
my $type = getline($proc);▼
my ($width, $height) = getline($proc).split: ' ';▼
my $depth = getline($proc);▼
my Bitmap $b = Bitmap.new( width => $width.Int, height => $height.Int) but PPM;▼
$b.data = $proc.out.slurp.ords.rotor(3).map:▼
{ Pixel.new(R => .[0], G => .[1], B => .[2]) };▼
'./camelia.ppm'.IO.open(:bin, :w).write: $b.P6;</lang>▼
See [https://github.com/thundergnat/rc/blob/master/img/camelia.png camelia image here].▼
=={{header|PicoLisp}}==
Line 395 ⟶ 353:
(image->bmp "input.jpg")</lang>
(formerly Perl 6)
▲{{works with|Rakudo|2017.09}}
▲Uses pieces from [[Bitmap#Perl_6| Bitmap]] and [[Bitmap/Read_a_PPM_file#Perl_6| Read a PPM file]] tasks. Included here to make a complete, runnable program.
▲Uses imagemagick convert to pipe the image in.
▲<lang perl6>class Pixel { has UInt ($.R, $.G, $.B) }
▲class Bitmap {
▲ has UInt ($.width, $.height);
▲ has Pixel @.data;
▲}
▲role PPM {
▲ method P6 returns Blob {
▲ "P6\n{self.width} {self.height}\n255\n".encode('ascii')
▲ ~ Blob.new: flat map { .R, .G, .B }, self.data
▲ }
▲}
▲sub getline ( $proc ) {
▲ my $line = '#'; # skip comment when reading a .png
▲ $line = $proc.out.get while $line.substr(0,1) eq '#';
▲ $line;
▲}
▲my $filename = './camelia.png';
▲my $proc = run 'convert', $filename, 'ppm:-', :enc('ISO-8859-1'), :out;
▲my $type = getline($proc);
▲my ($width, $height) = getline($proc).split: ' ';
▲my $depth = getline($proc);
▲my Bitmap $b = Bitmap.new( width => $width.Int, height => $height.Int) but PPM;
▲$b.data = $proc.out.slurp.ords.rotor(3).map:
▲ { Pixel.new(R => .[0], G => .[1], B => .[2]) };
▲'./camelia.ppm'.IO.open(:bin, :w).write: $b.P6;</lang>
▲See [https://github.com/thundergnat/rc/blob/master/img/camelia.png camelia image here].
=={{header|Ruby}}==
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