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|
package FixMyStreet::ImageMagick;
use Moo;
my $IM = eval {
return 0 if FixMyStreet->test_mode;
require Image::Magick;
Image::Magick->import;
1;
};
has blob => ( is => 'ro' );
has image => (
is => 'rwp',
lazy => 1,
default => sub {
my $self = shift;
return unless $IM;
my $image = Image::Magick->new;
$image->BlobToImage($self->blob);
return $image;
},
);
has width => (
is => 'rwp',
lazy => 1,
default => sub {
my $self = shift;
return unless $self->image;
return $self->image->Get('width');
}
);
has height => (
is => 'rwp',
lazy => 1,
default => sub {
my $self = shift;
return unless $self->image;
return $self->image->Get('height');
}
);
sub strip {
my $self = shift;
return $self unless $self->image;
$self->image->Strip();
return $self;
}
sub rotate {
my ($self, $direction) = @_;
return $self unless $self->image;
my $err = $self->image->Rotate($direction);
return 0 if $err;
$self->_set_width_and_height();
return $self;
}
# Shrinks a picture to the specified size, but keeping in proportion.
sub shrink {
my ($self, $size) = @_;
return $self unless $self->image;
my $err = $self->image->Scale(geometry => "$size>");
throw Error::Simple("resize failed: $err") if "$err";
$self->_set_width_and_height();
return $self->strip;
}
# Shrinks a picture to a given dimension (defaults to 90x60(, cropping so that
# it is exactly that.
sub crop {
my ($self, $size) = @_;
$size //= '90x60';
return $self unless $self->image;
my $err = $self->image->Resize( geometry => "$size^" );
throw Error::Simple("resize failed: $err") if "$err";
$err = $self->image->Extent( geometry => $size, gravity => 'Center' );
throw Error::Simple("resize failed: $err") if "$err";
$self->_set_width_and_height();
return $self->strip;
}
sub as_blob {
my $self = shift;
return $self->blob unless $self->image;
my @blobs = $self->image->ImageToBlob();
$self->_set_width_and_height();
$self->_set_image(undef);
return $blobs[0];
}
sub _set_width_and_height {
my $self = shift;
return unless $self->image;
my ($width, $height) = $self->image->Get('width', 'height');
$self->_set_width($width);
$self->_set_height($height);
}
1;
|
