mirror of https://github.com/qpdf/qpdf.git
67 lines
1.5 KiB
Perl
67 lines
1.5 KiB
Perl
#!/usr/bin/env perl
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require 5.008;
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use warnings;
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use strict;
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chdir("dct") or die "chdir testdir failed: $!\n";
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require TestDriver;
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# This test suite does light verification of DCT by running some data
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# through a round trip with one encoding system. The
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# examples/pdf-create program also exercises DCT but does so more
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# fully.
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my $td = new TestDriver('dct');
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cleanup();
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$td->runtest("compress",
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{$td->COMMAND => "dct_compress rawdata a.jpg 400 256 gray"},
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{$td->STRING => "", $td->EXIT_STATUS => 0});
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$td->runtest("decompress",
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{$td->COMMAND => "dct_uncompress a.jpg out"},
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{$td->STRING => "", $td->EXIT_STATUS => 0});
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# Compare
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my @raw = get_data('rawdata');
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my @processed = get_data('out');
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my $checked_data = 0;
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if ($td->runtest("bytes in data",
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{$td->STRING => scalar(@processed)},
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{$td->STRING => scalar(@raw)}))
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{
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my $mismatch = 0;
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for (my $i = 0; $i < scalar(@raw); ++$i)
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{
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$checked_data = 1;
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my $delta = abs(ord($raw[$i]) - ord($processed[$i]));
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if ($delta > 10)
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{
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++$mismatch;
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}
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}
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$td->runtest("data is close enough",
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{$td->STRING => $mismatch},
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{$td->STRING => '0'});
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}
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cleanup();
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$td->report(3 + $checked_data);
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sub cleanup
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{
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system("rm -f a.jpg out");
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}
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sub get_data
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{
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my $file = shift;
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local $/ = undef;
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open(F, "<$file") || die;
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binmode(F);
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my $data = <F>;
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close(F);
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split('', $data);
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}
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