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package C4::Images; |
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package C4::Images; |
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# Copyright (C) 2011 C & P Bibliography Services |
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# Jared Camins-Esakov <jcamins@cpbibliograpy.com> |
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# |
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# This file is part of Koha. |
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# |
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# Koha is free software; you can redistribute it and/or modify it under the |
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# terms of the GNU General Public License as published by the Free Software |
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# Foundation; either version 2 of the License, or (at your option) any later |
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# version. |
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# |
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# Koha is distributed in the hope that it will be useful, but WITHOUT ANY |
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# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR |
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# A PARTICULAR PURPOSE. See the GNU General Public License for more details. |
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# |
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# You should have received a copy of the GNU General Public License along |
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# with Koha; if not, write to the Free Software Foundation, Inc., |
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# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
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use strict; |
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use strict; |
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use warnings; |
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use warnings; |
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use 5.010; |
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use 5.010; |
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use GD;
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use vars qw($debug $VERSION @ISA @EXPORT); |
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use vars qw($debug $VERSION @ISA @EXPORT); |
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BEGIN { |
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BEGIN { |
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# set the version for version checking |
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$VERSION = 3.03; |
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# set the version for version checking |
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require Exporter; |
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$VERSION = 3.03; |
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@ISA = qw(Exporter); |
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require Exporter; |
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@EXPORT = qw( |
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@ISA = qw(Exporter); |
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&PutImage |
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@EXPORT = qw( |
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&RetrieveImage |
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&PutImage |
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&ListImagesForBiblio |
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&RetrieveImage |
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&DelImage |
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&ListImagesForBiblio |
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&DelImage |
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); |
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); |
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$debug = $ENV{KOHA_DEBUG} || $ENV{DEBUG} || 0; |
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$debug = $ENV{KOHA_DEBUG} || $ENV{DEBUG} || 0; |
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} |
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} |
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=head2 PutImage |
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=head2 PutImage |
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Stores binary image data and thumbnail in database, optionally replacing existin
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=cut |
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=cut |
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sub PutImage { |
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sub PutImage { |
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my ($biblionumber, $srcimage, $replace) = @_; |
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my ( $biblionumber, $srcimage, $replace ) = @_; |
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return -1 unless defined($srcimage); |
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return -1 unless defined($srcimage); |
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if ($replace) { |
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if ($replace) { |
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foreach (ListImagesForBiblio($biblionumber)) { |
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foreach ( ListImagesForBiblio($biblionumber) ) { |
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DelImage($_); |
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DelImage($_); |
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} |
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} |
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} |
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} |
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my $dbh = C4::Context->dbh; |
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my $dbh = C4::Context->dbh; |
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my $query = "INSERT INTO biblioimages (biblionumber, mimetype, imagefile, thumbnail) VALUES (?,?,?,?);"; |
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my $query = |
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"INSERT INTO biblioimages (biblionumber, mimetype, imagefile, thumbnail) VALUES (?,?,?,?);"; |
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my $sth = $dbh->prepare($query); |
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my $sth = $dbh->prepare($query); |
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my $mimetype = 'image/png'; # GD autodetects three basic image formats: PNG, JPEG, XPM; we will convert all to PNG which is lossless... |
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my $mimetype = 'image/png' |
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# Check the pixel size of the image we are about to import... |
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; # GD autodetects three basic image formats: PNG, JPEG, XPM; we will convert all to PNG which is lossless... |
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my $thumbnail = _scale_image($srcimage, 140, 200); # MAX pixel dims are 140 X 200 for thumbnail... |
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my $fullsize = _scale_image($srcimage, 600, 800); # MAX pixel dims are 600 X 800 for full-size image... |
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# Check the pixel size of the image we are about to import... |
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my $thumbnail = _scale_image( $srcimage, 140, 200 ) |
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; # MAX pixel dims are 140 X 200 for thumbnail... |
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my $fullsize = _scale_image( $srcimage, 600, 800 ) |
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; # MAX pixel dims are 600 X 800 for full-size image... |
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$debug and warn "thumbnail is " . length($thumbnail) . " bytes."; |
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$debug and warn "thumbnail is " . length($thumbnail) . " bytes."; |
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$sth->execute($biblionumber,$mimetype,$fullsize->png(),$thumbnail->png()); |
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$sth->execute( $biblionumber, $mimetype, $fullsize->png(), |
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$thumbnail->png() ); |
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my $dberror = $sth->errstr; |
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my $dberror = $sth->errstr; |
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warn "Error returned inserting $biblionumber.$mimetype." if $sth->errstr; |
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warn "Error returned inserting $biblionumber.$mimetype." if $sth->errstr; |
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undef $thumbnail; |
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undef $thumbnail; |
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sub RetrieveImage {
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my ($imagenumber) = @_; |
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my ($imagenumber) = @_; |
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my $dbh = C4::Context->dbh; |
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my $dbh = C4::Context->dbh; |
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my $query = 'SELECT mimetype, imagefile, thumbnail FROM biblioimages WHERE imagenumber = ?'; |
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my $query = |
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'SELECT mimetype, imagefile, thumbnail FROM biblioimages WHERE imagenumber = ?'; |
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my $sth = $dbh->prepare($query); |
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my $sth = $dbh->prepare($query); |
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$sth->execute($imagenumber); |
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$sth->execute($imagenumber); |
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my $imagedata = $sth->fetchrow_hashref; |
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my $imagedata = $sth->fetchrow_hashref; |
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if ($sth->err) { |
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if ( $sth->err ) { |
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warn "Database error!"; |
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warn "Database error!"; |
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return undef; |
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return undef; |
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} else { |
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} |
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else { |
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return $imagedata; |
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return $imagedata; |
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} |
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} |
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} |
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} |
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Gets a list of all images associated with a particular biblio.
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=cut |
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=cut |
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sub ListImagesForBiblio { |
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sub ListImagesForBiblio { |
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my ($biblionumber) = @_; |
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my ($biblionumber) = @_; |
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my @imagenumbers; |
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my @imagenumbers; |
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my $dbh = C4::Context->dbh; |
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my $dbh = C4::Context->dbh; |
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my $query = 'SELECT imagenumber FROM biblioimages WHERE biblionumber = ?'; |
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my $query = 'SELECT imagenumber FROM biblioimages WHERE biblionumber = ?'; |
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my $sth = $dbh->prepare($query); |
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my $sth = $dbh->prepare($query); |
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$sth->execute($biblionumber); |
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$sth->execute($biblionumber); |
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warn "Database error!" if $sth->errstr; |
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warn "Database error!" if $sth->errstr; |
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if (!$sth->errstr && $sth->rows > 0) { |
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if ( !$sth->errstr && $sth->rows > 0 ) { |
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while (my $row = $sth->fetchrow_hashref) { |
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while ( my $row = $sth->fetchrow_hashref ) { |
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push @imagenumbers, $row->{'imagenumber'}; |
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push @imagenumbers, $row->{'imagenumber'}; |
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} |
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} |
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return @imagenumbers; |
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return @imagenumbers; |
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} else { |
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} |
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else { |
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return undef; |
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return undef; |
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} |
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} |
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} |
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} |
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Removes the image with the supplied imagenumber.
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sub DelImage { |
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sub DelImage { |
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my ($imagenumber) = @_; |
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my ($imagenumber) = @_; |
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warn "Imagenumber passed to DelImage is $imagenumber" if $debug; |
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warn "Imagenumber passed to DelImage is $imagenumber" if $debug; |
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my $dbh = C4::Context->dbh; |
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my $dbh = C4::Context->dbh; |
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my $query = "DELETE FROM biblioimages WHERE imagenumber = ?;"; |
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my $query = "DELETE FROM biblioimages WHERE imagenumber = ?;"; |
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my $sth = $dbh->prepare($query); |
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my $sth = $dbh->prepare($query); |
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$sth->execute($imagenumber); |
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$sth->execute($imagenumber); |
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my $dberror = $sth->errstr; |
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my $dberror = $sth->errstr; |
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warn "Database error!" if $sth->errstr; |
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warn "Database error!" if $sth->errstr; |
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sub DelImage {
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} |
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} |
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sub _scale_image { |
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sub _scale_image { |
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my ($image, $maxwidth, $maxheight) = @_; |
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my ( $image, $maxwidth, $maxheight ) = @_; |
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my ($width, $height) = $image->getBounds(); |
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my ( $width, $height ) = $image->getBounds(); |
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$debug and warn "image is $width pix X $height pix."; |
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$debug and warn "image is $width pix X $height pix."; |
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if ($width > $maxwidth || $height > $maxheight) { |
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if ( $width > $maxwidth || $height > $maxheight ) { |
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# $debug and warn "$filename exceeds the maximum pixel dimensions of $maxwidth X $maxheight. Resizing..."; |
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# $debug and warn "$filename exceeds the maximum pixel dimensions of $maxwidth X $maxheight. Resizing..."; |
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my $percent_reduce; # Percent we will reduce the image dimensions by... |
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my $percent_reduce; # Percent we will reduce the image dimensions by... |
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if ($width > $maxwidth) { |
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if ( $width > $maxwidth ) { |
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$percent_reduce = sprintf("%.5f",($maxwidth/$width)); # If the width is oversize, scale based on width overage... |
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$percent_reduce = |
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} else { |
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sprintf( "%.5f", ( $maxwidth / $width ) ) |
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$percent_reduce = sprintf("%.5f",($maxheight/$height)); # otherwise scale based on height overage. |
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; # If the width is oversize, scale based on width overage... |
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} |
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} |
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my $width_reduce = sprintf("%.0f", ($width * $percent_reduce)); |
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else { |
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my $height_reduce = sprintf("%.0f", ($height * $percent_reduce)); |
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$percent_reduce = |
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$debug and warn "Reducing image by " . ($percent_reduce * 100) . "\% or to $width_reduce pix X $height_reduce pix"; |
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sprintf( "%.5f", ( $maxheight / $height ) ) |
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my $newimage = GD::Image->new($width_reduce, $height_reduce, 1); #'1' creates true color image... |
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; # otherwise scale based on height overage. |
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$newimage->copyResampled($image,0,0,0,0,$width_reduce,$height_reduce,$width,$height); |
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} |
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my $width_reduce = sprintf( "%.0f", ( $width * $percent_reduce ) ); |
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my $height_reduce = sprintf( "%.0f", ( $height * $percent_reduce ) ); |
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$debug |
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and warn "Reducing image by " |
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. ( $percent_reduce * 100 ) |
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. "\% or to $width_reduce pix X $height_reduce pix"; |
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my $newimage = GD::Image->new( $width_reduce, $height_reduce, 1 ) |
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; #'1' creates true color image... |
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$newimage->copyResampled( $image, 0, 0, 0, 0, $width_reduce, |
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$height_reduce, $width, $height ); |
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return $newimage; |
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return $newimage; |
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} else { |
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} |
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else { |
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return $image; |
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return $image; |
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} |
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} |
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} |
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} |