307 lines
9.0 KiB
Perl
307 lines
9.0 KiB
Perl
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#------------------------------------------------------------------------------
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# File: PSP.pm
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#
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# Description: Read Paint Shop Pro meta information
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#
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# Revisions: 2010/01/23 - P. Harvey Created
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#
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# References: 1) http://www.jasc.com/support/kb/articles/pspspec.asp
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#------------------------------------------------------------------------------
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package Image::ExifTool::PSP;
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use strict;
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use vars qw($VERSION);
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use Image::ExifTool qw(:DataAccess :Utils);
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use Image::ExifTool::Exif;
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$VERSION = '1.05';
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sub ProcessExtData($$$);
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# PSP info
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%Image::ExifTool::PSP::Main = (
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GROUPS => { 2 => 'Image' },
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VARS => { ALPHA_FIRST => 1 },
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NOTES => q{
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Tags extracted from Paint Shop Pro images (PSP, PSPIMAGE, PSPFRAME,
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PSPSHAPE, PSPTUBE and TUB extensions).
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},
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# FileVersions:
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# 3.0 => PSP 5
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# 4.0 => PSP 6
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# 5.0 => PSP 7
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# 6.0 => PSP 8
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# 7.0 => PSP 9
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# ? => PSP X
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# ? => PSP X1 (is this the same as X?)
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# ? => PSP X2
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# 10.0 => PSP X3 (= PSP 13)
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FileVersion => { PrintConv => '$val=~tr/ /./; $val' },
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0 => [
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{
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Condition => '$$self{PSPFileVersion} > 3',
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Name => 'ImageInfo',
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SubDirectory => {
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TagTable => 'Image::ExifTool::PSP::Image',
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Start => 4,
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},
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},
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{
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Name => 'ImageInfo',
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SubDirectory => {
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TagTable => 'Image::ExifTool::PSP::Image',
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},
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},
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],
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1 => {
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Name => 'CreatorInfo',
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SubDirectory => { TagTable => 'Image::ExifTool::PSP::Creator' },
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},
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10 => {
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Name => 'ExtendedInfo',
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SubDirectory => { TagTable => 'Image::ExifTool::PSP::Ext' },
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},
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# this is inside the composite image bank block (16), which I don't want to parse...
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#18 => {
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# Name => 'PreviewImage',
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# Groups => { 2 => 'Preview' },
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# RawConv => '$self->ValidateImage(\$val,$tag)',
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#},
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);
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# the PSP image block
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%Image::ExifTool::PSP::Image = (
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PROCESS_PROC => \&Image::ExifTool::ProcessBinaryData,
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GROUPS => { 2 => 'Image' },
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0 => { Name => 'ImageWidth', Format => 'int32u' },
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4 => { Name => 'ImageHeight', Format => 'int32u' },
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8 => { Name => 'ImageResolution', Format => 'double' },
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16 => {
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Name => 'ResolutionUnit',
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Format => 'int8u',
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PrintConv => {
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0 => 'None',
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1 => 'inches',
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2 => 'cm',
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},
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},
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17 => {
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Name => 'Compression',
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Format => 'int16u',
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PrintConv => {
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0 => 'None',
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1 => 'RLE',
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2 => 'LZ77',
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3 => 'JPEG',
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},
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},
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19 => { Name => 'BitsPerSample',Format => 'int16u' },
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21 => { Name => 'Planes', Format => 'int16u' },
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23 => { Name => 'NumColors', Format => 'int32u' },
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);
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# the PSP creator data block
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%Image::ExifTool::PSP::Creator = (
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PROCESS_PROC => \&ProcessExtData,
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GROUPS => { 2 => 'Image' },
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PRIORITY => 0, # prefer EXIF if it exists
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0 => 'Title',
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1 => {
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Name => 'CreateDate',
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Format => 'int32u',
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Groups => { 2 => 'Time' },
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ValueConv => 'Image::ExifTool::ConvertUnixTime($val,1)',
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PrintConv => '$self->ConvertDateTime($val)',
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},
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2 => {
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Name => 'ModifyDate',
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Format => 'int32u',
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Groups => { 2 => 'Time' },
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ValueConv => 'Image::ExifTool::ConvertUnixTime($val,1)',
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PrintConv => '$self->ConvertDateTime($val)',
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},
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3 => {
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Name => 'Artist',
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Groups => { 2 => 'Author' },
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},
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4 => {
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Name => 'Copyright',
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Groups => { 2 => 'Author' },
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},
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5 => 'Description',
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6 => {
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Name => 'CreatorAppID',
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Format => 'int32u',
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PrintConv => {
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0 => 'Unknown',
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1 => 'Paint Shop Pro',
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},
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},
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7 => {
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Name => 'CreatorAppVersion',
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Format => 'int8u',
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Count => 4,
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ValueConv => 'join(" ",reverse split " ", $val)', # low byte first
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PrintConv => '$val=~tr/ /./; $val',
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},
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);
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# the PSP extended data block
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%Image::ExifTool::PSP::Ext = (
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PROCESS_PROC => \&ProcessExtData,
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GROUPS => { 2 => 'Image' },
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3 => {
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Name => 'EXIFInfo', #(don't change this name, it is used in the code)
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SubDirectory => { TagTable => 'Image::ExifTool::Exif::Main' },
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},
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);
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#------------------------------------------------------------------------------
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# Extract information from the extended data block
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# Inputs: 0) ExifTool object ref, 1) dirInfo ref, 2) tag table ref
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# Returns: 1 on success
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sub ProcessExtData($$$)
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{
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my ($et, $dirInfo, $tagTablePtr) = @_;
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my $dataPt = $$dirInfo{DataPt};
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my $dirLen = $$dirInfo{DirLen};
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my $pos = 0;
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# loop through sub-blocks
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while ($pos + 10 < $dirLen) {
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unless (substr($$dataPt, $pos, 4) eq "~FL\0") {
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$et->Warn('Lost synchronization while reading sub blocks');
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last;
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}
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my $tag = Get16u($dataPt, $pos + 4);
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my $len = Get32u($dataPt, $pos + 6);
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$pos += 10 + $len;
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if ($pos > $dirLen) {
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$et->Warn("Truncated sub block ID=$tag len=$len");
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last;
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}
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next unless $$tagTablePtr{$tag};
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my $tagInfo = $et->GetTagInfo($tagTablePtr, $tag) or next;
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my $start = $pos - $len;
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unless ($$tagInfo{Name} eq 'EXIFInfo') {
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$et->HandleTag($tagTablePtr, $tag, undef,
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TagInfo => $tagInfo,
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DataPt => $dataPt,
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DataPos => $$dirInfo{DataPos},
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DataLen => length $$dataPt,
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Start => $start,
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Size => $len,
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);
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next;
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}
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# validate EXIF block header and set byte order
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next unless $len > 14 and substr($$dataPt, $pos - $len, 6) eq "Exif\0\0";
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next unless SetByteOrder(substr($$dataPt, $start + 6, 2));
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# This is REALLY annoying... They use a standard TIFF offset to point to
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# the first IFD, but after that the offsets are relative to the start of
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# the IFD instead of the TIFF base, which means that I must handle it as a
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# special case. Dumb, dumb...
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$start += 14;
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my %dirInfo = (
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DirName => 'EXIF',
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Parent => 'PSP',
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DataPt => $dataPt,
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DataPos => -$start, # data position relative to Base
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DataLen => length $$dataPt,
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DirStart => $start,
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Base => $start + $$dirInfo{DataPos}, # absolute base offset
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Multi => 0,
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);
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my $exifTable = GetTagTable($$tagInfo{SubDirectory}{TagTable});
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Image::ExifTool::Exif::ProcessExif($et, \%dirInfo, $exifTable);
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SetByteOrder('II');
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}
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return 1;
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}
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#------------------------------------------------------------------------------
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# Extract information from a PSP file
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# Inputs: 0) ExifTool object reference, 1) dirInfo reference
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# Returns: 1 on success, 0 if this wasn't a valid PSP file
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sub ProcessPSP($$)
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{
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my ($et, $dirInfo) = @_;
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my $raf = $$dirInfo{RAF};
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my ($buff, $tag, $len, $err);
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return 0 unless $raf->Read($buff, 32) == 32 and
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$buff eq "Paint Shop Pro Image File\x0a\x1a\0\0\0\0\0" and
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$raf->Read($buff, 4) == 4;
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$et->SetFileType();
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SetByteOrder('II');
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my $tagTablePtr = GetTagTable('Image::ExifTool::PSP::Main');
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my @a = unpack('v*', $buff);
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# figure out block header length for this format PSP file
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my $hlen = $a[0] > 3 ? 10 : 14;
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$$et{PSPFileVersion} = $a[0]; # save for use in Condition
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$et->HandleTag($tagTablePtr, FileVersion => "@a");
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# loop through blocks in file
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my $pos = 36;
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for (;;) {
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last unless $raf->Read($buff, $hlen) == $hlen;
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unless ($buff =~ /^~BK\0/) {
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$et->Warn('Lost synchronization while reading main PSP blocks');
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last;
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}
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$tag = Get16u(\$buff, 4);
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$len = Get32u(\$buff, $hlen - 4);
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$pos += $hlen + $len;
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unless ($$tagTablePtr{$tag}) {
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$raf->Seek($len, 1) or $err=1, last;
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next;
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}
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$raf->Read($buff, $len) == $len or $err=1, last;
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$et->HandleTag($tagTablePtr, $tag, $buff,
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DataPt => \$buff,
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DataPos => $pos - $len,
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Size => $len,
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);
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}
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$err and $et->Warn("Truncated main block ID=$tag len=$len");
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return 1;
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}
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1; # end
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__END__
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=head1 NAME
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Image::ExifTool::PSP - Read Paint Shop Pro meta information
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=head1 SYNOPSIS
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This module is used by Image::ExifTool
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=head1 DESCRIPTION
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This module contains routines required by Image::ExifTool to extract
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information from Paint Shop Pro images.
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=head1 AUTHOR
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Copyright 2003-2016, Phil Harvey (phil at owl.phy.queensu.ca)
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This library is free software; you can redistribute it and/or modify it
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under the same terms as Perl itself.
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=head1 REFERENCES
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=over 4
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=item L<http://www.jasc.com/support/kb/articles/pspspec.asp>
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=back
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=head1 SEE ALSO
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L<Image::ExifTool::TagNames/PSP Tags>,
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L<Image::ExifTool(3pm)|Image::ExifTool>
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=cut
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