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package Imager::File::PNG;
use 5.006;
use strict;
use Imager;
BEGIN {
our $VERSION = "0.99";
require XSLoader;
XSLoader::load('Imager::File::PNG', $VERSION);
}
sub read {
my ($class, $im, $io, %hsh) = @_;
my $flags = 0;
$hsh{png_ignore_benign_errors}
and $flags |= IMPNG_READ_IGNORE_BENIGN_ERRORS;
$im->{IMG} = i_readpng_wiol($io, $flags);
unless ($im->{IMG}) {
$im->_set_error(Imager->_error_as_msg);
return;
}
return $im;
}
Imager->register_reader
(
type=>'png',
single =>
sub {
my ($im, $io, %hsh) = @_;
__PACKAGE__->read($im, $io, %hsh);
},
);
sub write {
my ($class, $im, $io, %hsh) = @_;
$im->_set_opts(\%hsh, "i_", $im);
$im->_set_opts(\%hsh, "png_", $im);
unless (i_writepng_wiol($im->{IMG}, $io)) {
$im->_set_error(Imager->_error_as_msg);
return;
}
return $im;
}
Imager->register_writer
(
type=>'png',
single =>
sub {
my ($im, $io, %hsh) = @_;
return __PACKAGE__->write($im, $io, %hsh);
},
);
__END__
=head1 NAME
Imager::File::PNG - read and write PNG files
=head1 SYNOPSIS
use Imager;
my $img = Imager->new;
$img->read(file=>"foo.png")
or die $img->errstr;
$img->write(file => "foo.png")
or die $img->errstr;
=head1 DESCRIPTION
Imager's PNG support is documented in L<Imager::Files>.
=head1 METHODS
Two low level class methods are provided, most for use by
L<Imager::File::APNG>, but it may later be used for other formats that
can encapsulate PNG such as ICO.
=over
=item C<< Imager::File::PNG->read($im, $io, %hsh) >>
Read a PNG image from the supplied L<Imager::IO> object C<$io> into
the L<Imager> object C<$im>.
Returns a true value on success.
=item C<< Imager::File::PNG->write($im, $io, %hsh) >>
Write a PNG image to the supplied L<Imager::IO> object C<$io> from the
L<Imager> object C<$im>.
Returns a true value on success.
=back
=head1 AUTHOR
Tony Cook <tonyc@cpan.org>
=head1 SEE ALSO
L<Imager>, L<Imager::Files>.
=cut
|
