ZirePhoto(3) User Contributed Perl Documentation ZirePhoto(3)NAME
Palm::ZirePhoto - Handler for Palm Zire71 Photo thumbnail databases.
SYNOPSIS
use Palm::ZirePhoto;
DESCRIPTION
The Zire71 PDB handler is a helper class for the Palm::PDB package. It
parses Zire71 Photo thumbnail databases (and, hopefully, Tungsten Photo
databases). Actual photos are separate databases and must be processed
separately.
This database is currently only capable of reading.
AppInfo block
The AppInfo block begins with standard category support. See
Palm::StdAppInfo for details.
Records
Records may contain no data fields. This occurs when the record has
been marked deleted on the Palm, presumably in order to save space
(Photo has no provision for archiving when deleting and the separate
database storage for the actual images would make it pointless
anyways).
$record = $pdb->{records}[N]
$record->{'width'}
$record->{'height'}
$record->{'size'}
The actual JPEG images dimensions and (compressed) file size.
$record->{'thumb'}
The thumbnail is a very small (max size approx 84x84) JPEG format
image.
$record->{'name'}
Image name. Appending ".jpg" to this will give the database name of the
actual image data.
$record->{'time1'}
$record->{'time2'}
Unix epoch time of when the image was last modified ("time1") and when
it was created ("time2").
Photo Databases
Actual photos are stored in separate databases. Each record is
preceeded by an 8 byte header that describes it a) as a data block
(DBLK) and b) the size of the block. Records are generally 4k, except
for the last. To convert a Photo database to a JPEG image, one would do
something like:
use Palm::Raw;
my $pdb = new Palm::PDB;
$pdb->Load( "image.jpg.pdb" );
open F, ">image.jpg";
for( @{$pdb->{records}} ) {
print F substr($_->{'data'}, 8);
}
close F;
Notes are stored at the end of the JPEG image. Use "ParseNote" to get
it.
METHODS
Handling Palm photos can be a bit complicated. Some helper methods are
exported to make some special cases a bit easier.
ParseNote
my $photo = read_jpeg_file( "image.jpg" );
my $note = Palm::ZirePhoto::ParseNote($photo);
print "Note: $note" if defined $note;
The Palm photo application stores user notes at the end of the JPEG
file itself. This method will extract that note and return it. "undef"
is returned if the note is unavailable.
ParseAlbum
my $album = slurp("/DCIM/Unfiled/Album.db");
my @records = Palm::ZirePhoto::ParseAlbum( $album );
print $_->{name},"\n" for( @records );
Photos on memory cards are stored in subdirectories of "/DCIM". The
meta-data for these images are stored in "Album.db" files under each
category directory. This method will parse out the meta-data into an
array of records similar to those returned by "ParseRecord". Thumbnail
information, however, is not available.
SOURCE CONTROL
The source is in Github:
http://github.com/briandfoy/p5-Palm/tree/master
AUTHOR
Alessandro Zummo, "<a.zummo@towertech.it>"
Currently maintained by brian d foy, "<bdfoy@cpan.org>"
SEE ALSOPalm::PDB(3)Palm::StdAppInfo(3)perl v5.14.0 2010-02-23 ZirePhoto(3)
