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| author | Jesse Luehrs <doy@tozt.net> | 2014-10-07 14:11:36 -0400 |
|---|---|---|
| committer | Jesse Luehrs <doy@tozt.net> | 2014-10-07 14:15:09 -0400 |
| commit | c2372470164611b5597ea63faf8dcfe33381df39 (patch) | |
| tree | 4e2eace2403ab2bc9790d2fb6d0bd629ecae35b6 | |
| parent | 64157f5b6f4649f7ca845cb119535863dd221822 (diff) | |
| download | image-pnm-c2372470164611b5597ea63faf8dcfe33381df39.tar.gz image-pnm-c2372470164611b5597ea63faf8dcfe33381df39.zip | |
implement P2
| -rw-r--r-- | lib/Image/PNM.pm | 37 | ||||
| -rw-r--r-- | t/P2.t | 30 | ||||
| -rw-r--r-- | t/data/P2.pgm | 52 |
3 files changed, 119 insertions, 0 deletions
diff --git a/lib/Image/PNM.pm b/lib/Image/PNM.pm index 7302683..5a97439 100644 --- a/lib/Image/PNM.pm +++ b/lib/Image/PNM.pm @@ -88,6 +88,22 @@ HEADER return $data; } +sub _as_string_P2 { + my $self = shift; + + my $data = <<HEADER; +P2 +$self->{w} $self->{h} +$self->{max} +HEADER + + for my $row (@{ $self->{pixels} }) { + $data .= join(' ', @$row) . "\n"; + } + + return $data; +} + sub _as_string_P3 { my $self = shift; @@ -173,6 +189,27 @@ sub _parse_pnm_P1 { } } +sub _parse_pnm_P2 { + my $self = shift; + my ($next_line) = @_; + + chomp (my $max = $next_line->()); + die "Invalid max color value: $max" + unless $max =~ /^[0-9]+$/ && $max > 0; + $self->{max} = $max; + + my $next_word = $self->_make_next_word($next_line, 1); + + $self->{pixels} = []; + for my $i (1..$self->{h}) { + my $row = []; + for my $j (1..$self->{w}) { + push @$row, $next_word->(); + } + push @{ $self->{pixels} }, $row; + } +} + sub _parse_pnm_P3 { my $self = shift; my ($next_line) = @_; @@ -0,0 +1,30 @@ +#!/usr/bin/env perl +use strict; +use warnings; +use Test::More; + +use Image::PNM; + +my $image = Image::PNM->new('t/data/P2.pgm'); + +is($image->width, 6); +is($image->height, 8); +is($image->max_pixel_value, 255); +is_deeply($image->raw_pixel(1, 2), [78, 78, 78]); +is_deeply($image->pixel(0, 0), [1, 1, 1]); + +is($image->as_string('P2'), <<IMAGE); +P2 +6 8 +255 +255 255 255 255 255 255 +255 255 78 78 255 255 +255 0 255 255 0 255 +0 255 255 255 255 0 +0 54 54 54 54 0 +0 255 255 255 255 0 +0 255 255 255 255 0 +255 255 255 255 255 255 +IMAGE + +done_testing; diff --git a/t/data/P2.pgm b/t/data/P2.pgm new file mode 100644 index 0000000..0dbad2e --- /dev/null +++ b/t/data/P2.pgm @@ -0,0 +1,52 @@ +P2 +# CREATOR: GIMP PNM Filter Version 1.1 +6 8 +255 +255 +255 +255 +255 +255 +255 +255 +255 +78 +78 +255 +255 +255 +0 +255 +255 +0 +255 +0 +255 +255 +255 +255 +0 +0 +54 +54 +54 +54 +0 +0 +255 +255 +255 +255 +0 +0 +255 +255 +255 +255 +0 +255 +255 +255 +255 +255 +255 |