1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
|
#------------------------------------------------------------------------------
# File: PCX.pm
#
# Description: Read metadata from PC Paintbrush files
#
# Revisions: 2018/12/12 - P. Harvey Created
#
# References: 1) http://qzx.com/pc-gpe/pcx.txt
# 2) https://www.fileformat.info/format/pcx/corion.htm
#------------------------------------------------------------------------------
package Image::ExifTool::PCX;
use strict;
use vars qw($VERSION);
use Image::ExifTool qw(:DataAccess :Utils);
$VERSION = '1.00';
# PCX info
%Image::ExifTool::PCX::Main = (
PROCESS_PROC => \&Image::ExifTool::ProcessBinaryData,
GROUPS => { 0 => 'File', 1 => 'File', 2 => 'Image' },
NOTES => 'Tags extracted from PC Paintbrush images.',
DATAMEMBER => [ 0x04, 0x05 ],
0x00 => {
Name => 'Manufacturer',
PrintConv => { 10 => 'ZSoft' },
},
0x01 => {
Name => 'Software',
PrintConv => {
0 => 'PC Paintbrush 2.5',
2 => 'PC Paintbrush 2.8 (with palette)',
3 => 'PC Paintbrush 2.8 (without palette)',
4 => 'PC Paintbrush for Windows',
5 => 'PC Paintbrush 3.0+',
},
},
0x02 => { Name => 'Encoding', PrintConv => { 1 => 'RLE' } },
0x03 => 'BitsPerPixel',
0x04 => {
Name => 'LeftMargin',
Format => 'int16u',
RawConv => '$$self{LeftMargin} = $val',
},
0x06 => {
Name => 'TopMargin',
Format => 'int16u',
RawConv => '$$self{TopMargin} = $val',
},
0x08 => {
Name => 'ImageWidth',
Format => 'int16u',
ValueConv => '$val - $$self{LeftMargin} + 1',
},
0x0a => {
Name => 'ImageHeight',
Format => 'int16u',
ValueConv => '$val - $$self{TopMargin} + 1',
},
0x0c => 'XResolution',
0x0e => 'YResolution',
0x41 => 'ColorPlanes',
0x42 => { Name => 'BytesPerLine', Format => 'int16u' },
0x44 => {
Name => 'ColorMode',
PrintConv => {
0 => 'n/a',
1 => 'Color Palette',
2 => 'Grayscale',
},
},
0x46 => { Name => 'ScreenWidth', Format => 'int16u', RawConv => '$val or undef' },
0x48 => { Name => 'ScreenHeight', Format => 'int16u', RawConv => '$val or undef' },
);
#------------------------------------------------------------------------------
# Extract information from a PCX image
# Inputs: 0) ExifTool object reference, 1) dirInfo reference
# Returns: 1 on success, 0 if this wasn't a valid PCX file
sub ProcessPCX($$)
{
my ($et, $dirInfo) = @_;
my $raf = $$dirInfo{RAF};
my $buff;
return 0 unless $raf->Read($buff, 0x50) == 0x50 and
$buff =~ /^\x0a[\0-\x05]\x01[\x01\x02\x04\x08].{64}[\0-\x02]/s;
SetByteOrder('II');
$et->SetFileType();
my %dirInfo = ( DirName => 'PCX', DataPt => \$buff );
my $tagTablePtr = GetTagTable('Image::ExifTool::PCX::Main');
return $et->ProcessBinaryData(\%dirInfo, $tagTablePtr);
}
1; # end
__END__
=head1 NAME
Image::ExifTool::PCX - Read metadata from PC Paintbrush files
=head1 SYNOPSIS
This module is used by Image::ExifTool
=head1 DESCRIPTION
This module contains routines required by Image::ExifTool to extract
information from PC Paintbrush (PCX) files.
=head1 AUTHOR
Copyright 2003-2018, Phil Harvey (phil at owl.phy.queensu.ca)
This library is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.
=head1 REFERENCES
=over 4
=item L<http://qzx.com/pc-gpe/pcx.txt>
=item L<https://www.fileformat.info/format/pcx/corion.htm>
=back
=head1 SEE ALSO
L<Image::ExifTool::TagNames/PCX Tags>,
L<Image::ExifTool(3pm)|Image::ExifTool>
=cut
|
