mirror of https://github.com/qpdf/qpdf.git
74 lines
1.8 KiB
Perl
74 lines
1.8 KiB
Perl
#!/usr/bin/env perl
|
|
require 5.008;
|
|
use warnings;
|
|
use strict;
|
|
|
|
chdir("dct") or die "chdir testdir failed: $!\n";
|
|
|
|
require TestDriver;
|
|
|
|
# This test suite does light verification of DCT by running some data
|
|
# through a round trip with one encoding system. The
|
|
# examples/pdf-create program also exercises DCT but does so more
|
|
# fully.
|
|
|
|
my $td = new TestDriver('dct');
|
|
|
|
cleanup();
|
|
|
|
my $checked_data = 0;
|
|
foreach my $d (['rawdata', '400 256 gray', 0],
|
|
['big-rawdata', '1024 576 rgb', 0.2])
|
|
{
|
|
my ($in, $args, $mismatch_fraction) = @$d;
|
|
$td->runtest("compress",
|
|
{$td->COMMAND => "dct_compress $in a.jpg $args"},
|
|
{$td->STRING => "", $td->EXIT_STATUS => 0});
|
|
$td->runtest("decompress",
|
|
{$td->COMMAND => "dct_uncompress a.jpg out"},
|
|
{$td->STRING => "", $td->EXIT_STATUS => 0});
|
|
# Compare
|
|
my @raw = get_data($in);
|
|
my @processed = get_data('out');
|
|
my $bytes = scalar(@raw);
|
|
if ($td->runtest("bytes in data",
|
|
{$td->STRING => scalar(@processed)},
|
|
{$td->STRING => $bytes}))
|
|
{
|
|
++$checked_data;
|
|
my $mismatch = 0;
|
|
for (my $i = 0; $i < scalar(@raw); ++$i)
|
|
{
|
|
my $delta = abs(ord($raw[$i]) - ord($processed[$i]));
|
|
if ($delta > 10)
|
|
{
|
|
++$mismatch;
|
|
}
|
|
}
|
|
my $threshold = int($mismatch_fraction * $bytes);
|
|
$td->runtest("data is close enough",
|
|
{$td->STRING => $mismatch <= $threshold ? 'pass' : 'fail'},
|
|
{$td->STRING => 'pass'});
|
|
}
|
|
}
|
|
|
|
cleanup();
|
|
|
|
$td->report(6 + $checked_data);
|
|
|
|
sub cleanup
|
|
{
|
|
system("rm -f a.jpg out");
|
|
}
|
|
|
|
sub get_data
|
|
{
|
|
my $file = shift;
|
|
local $/ = undef;
|
|
open(F, "<$file") || die;
|
|
binmode(F);
|
|
my $data = <F>;
|
|
close(F);
|
|
split('', $data);
|
|
}
|