148 lines
3.4 KiB
Perl
148 lines
3.4 KiB
Perl
package WebGUI::Storage::Image;
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=head1 LEGAL
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-------------------------------------------------------------------
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WebGUI is Copyright 2001-2005 Plain Black Corporation.
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-------------------------------------------------------------------
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Please read the legal notices (docs/legal.txt) and the license
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(docs/license.txt) that came with this distribution before using
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this software.
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-------------------------------------------------------------------
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http://www.plainblack.com info@plainblack.com
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-------------------------------------------------------------------
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=cut
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use strict;
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use WebGUI::Session;
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use WebGUI::Storage;
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use WebGUI::Utility;
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# do a check to see if they've installed Image::Magick
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my $hasImageMagick = 1;
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eval " use Image::Magick; "; $hasImageMagick=0 if $@;
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our @ISA = qw(WebGUI::Storage);
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=head1 NAME
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Package WebGUI::Storage::Image
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=head1 DESCRIPTION
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Extends WebGUI::Storageto add image manipulation operations.
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=head1 SYNOPSIS
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use WebGUI::Storage::Image;
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=head1 METHODS
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These methods are available from this class:
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my $boolean = $self->generateThumbnail($filename);
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my $url = $self->getThumbnailUrl;
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my $boolean = $self->isImage;
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=cut
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#-------------------------------------------------------------------
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=head2 generateThumbnail ( filename, [ thumbnailSize ] )
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Generates a thumbnail for this image.
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=head3 filename
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The file to generate a thumbnail for.
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=head3 thumbnailSize
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The size in pixels of the thumbnail to be generated. If not specified the thumbnail size in the global settings will be used.
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=cut
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sub generateThumbnail {
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my $self = shift;
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my $filename = shift;
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my $thumbnailSize = shift || $session{setting}{thumbnailSize};
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unless (defined $filename) {
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WebGUI::ErrorHandler::warn("Can't generate a thumbnail when you haven't specified a file.");
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return 0;
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}
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unless ($hasImageMagick) {
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WebGUI::ErrorHandler::warn("Can't generate a thumbnail if you don't have Image Magick.");
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return 0;
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}
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unless ($self->isImage($filename)) {
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WebGUI::ErrorHandler::warn("Can't generate a thumbnail for something that's not an image.");
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return 0;
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}
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my $image = Image::Magick->new;
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my $error = $image->Read($self->getPath($filename));
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if ($error) {
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WebGUI::ErrorHandler::warn("Couldn't read image for thumbnail creation: ".$error);
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return 0;
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}
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my ($x, $y) = $image->Get('width','height');
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my $n = $thumbnailSize;
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if ($x > $n || $y > $n) {
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my $r = $x>$y ? $x / $n : $y / $n;
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$image->Scale(width=>($x/$r),height=>($y/$r));
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}
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$error = $image->Write($self->getPath.$session{os}{slash}.'thumb-'.$filename);
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if ($error) {
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WebGUI::ErrorHandler::warn("Couldn't create thumbnail: ".$error);
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return 0;
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}
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return 1;
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}
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#-------------------------------------------------------------------
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=head2 getThumbnailUrl ( filename )
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Returns the URL to a thumbnail for a given image.
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=head3 filename
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The file to retrieve the thumbnail for.
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=cut
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sub getThumbnailUrl {
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my $self = shift;
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my $filename = shift;
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return $self->getUrl("thumb-".$filename);
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}
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#-------------------------------------------------------------------
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=head2 isImage ( filename )
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Checks to see that the file specified is an image. Returns a 1 or 0 depending upon the result.
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=head3 filename
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The file to check.
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=cut
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sub isImage {
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my $self = shift;
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my $filename = shift;
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return isIn($self->getFileExtension($filename), qw(jpeg jpg gif png))
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}
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1;
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