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# DO NOT EDIT! THIS FILE IS AUTOGENERATED BY lib/GD/Image_pm.PL
package GD::Image;
use strict;
use GD;
use Symbol 'gensym','qualify_to_ref';
use vars '$VERSION';
$VERSION = '2.83';
HideShow 72 lines of Pod
=head1 NAME
GD::Image - Image class for the GD image library
=head1 SYNOPSIS
See L<GD>
=head1 DESCRIPTION
Supported Image formats:
=over 4
=item Png
=item Gif
=item Jpeg
=item Tiff
=item Xbm
=item WBMP
=item BMP
=item Webp
=item Avif
=back
Unsupported Image formats:
=over 4
=item Gd
=item Gd2
=item Xpm
=item GifAnim
=item Heif
=back
See L<GD>
=head1 AUTHOR
The GD.pm interface is copyright 1995-2005, Lincoln D. Stein.  It is
distributed under the same terms as Perl itself.  See the "Artistic
License" in the Perl source code distribution for licensing terms.
The latest versions of GD.pm are available on CPAN:
  http://www.cpan.org
=head1 SEE ALSO
L<GD>
L<GD::Polyline>,
L<GD::SVG>,
L<GD::Simple>,
L<Image::Magick>
=cut
# Copyright 1995 Lincoln D. Stein.  See accompanying README file for
# usage information
*stringTTF = \&GD::Image::stringFT;
sub _make_filehandle {
  shift;  # get rid of class
  no strict 'refs';
  my $thing = shift;
  return $thing if defined(fileno $thing);
  # otherwise try qualifying it into caller's package
  my $fh;
  {   
    local $^W = 0;  # to avoid uninitialized variable warning from Symbol.pm
    my $pkg = caller(2);
    $pkg = "main" unless defined $pkg;;
    $fh = qualify_to_ref($thing,$pkg);
  }
  return $fh if defined(fileno $fh);
  # otherwise treat it as a file to open
  $fh = gensym;
  if (!open($fh,$thing)) {
    die "$thing not found: $!";
    return undef;
  }
  return $fh;
}
sub new {
  my $pack = shift;
  if (@_ == 1) {
    if (my $type = _image_type($_[0])) {
      my $method = "newFrom${type}Data";
      return unless $pack->can($method);
      return $pack->$method($_[0]);
    } elsif (-f $_[0] and $_[0] =~ /\.gd$/) {
      my $type = 'Gd';
      return unless my $fh = $pack->_make_filehandle($_[0]);
      my $method = "newFrom${type}";
      return unless $pack->can($method);
      return $pack->$method($fh);
    } elsif (-f $_[0] and $_[0] =~ /\.gd2$/) {
      my $type = 'Gd2';
      return unless my $fh = $pack->_make_filehandle($_[0]);
      my $method = "newFrom${type}";
      return unless $pack->can($method);
      return $pack->$method($fh);
    } elsif (-f $_[0] and $_[0] =~ /\.wbmp$/) {
      my $type = 'WBMP';
      return unless my $fh = $pack->_make_filehandle($_[0]);
      my $method = "newFrom${type}";
      return unless $pack->can($method);
      return $pack->$method($fh);
    } elsif (-f $_[0] and $_[0] =~ /\.xpm$/) {
      my $type = 'Xpm';
      my $method = "newFrom${type}";
      return unless $pack->can($method);
      return $pack->$method($_[0]);
    }
    return unless my $fh = $pack->_make_filehandle($_[0]);
    my $magic;
    return unless read($fh,$magic,64);
    return unless my $type = _image_type($magic);
    seek($fh,0,0);
    my $method = "newFrom${type}";
    if ($type eq 'Xpm') {
      return $pack->$method($_[0]);
    } else {
      return $pack->$method($fh);
    }
  }
  return $pack->_new(@_);
}
sub newTrueColor {
  my $pack = shift;
  return $pack->_new(@_, 1);
}
sub newPalette {
  my $pack = shift;
  return $pack->_new(@_, 0);
}
sub ellipse ($$$$$) {
  my ($self,$cx,$cy,$width,$height,$color) = @_;
  $self->arc($cx,$cy,$width,$height,0,360,$color);
}
# draws closed polygon with the specified color
sub polygon {
    my $self = shift;
    my($p,$c) = @_;
    $self->openPolygon($p, $c);
    $self->line( @{$p->{'points'}->[0]},
            @{$p->{'points'}->[$p->{'length'}-1]}, $c);
}
sub width {
  my $self = shift;
  my @bounds = $self->getBounds;
  $bounds[0];
}
sub height {
  my $self = shift;
  my @bounds = $self->getBounds;
  $bounds[1];
}
sub _image_type {
  my $data = shift;
  my $magic = substr($data,0,4);
  return 'Png'  if $magic eq "\x89PNG";
  return 'Jpeg' if ((substr($data,0,3) eq "\377\330\377") &&
    ord(substr($data,3,1)) >= 0xc0);
  return 'Gif'  if $magic eq "GIF8";
  return 'Gd2'  if $magic eq "gd2\000";
  return 'Tiff' if $magic eq "\x4d\x4d\x00\x2a" or
    $magic eq "\x49\x49\x2a\x00" or
    $magic eq "IIN1";
  return 'Bmp' if $magic eq "BMF\000";
  return 'Webp' if $magic eq "RIFF" and substr($data,8,4) eq "WEBP";
  if (substr($data,4,4) eq "ftyp") { #possibly ISOBMFF-compliant container like HEIF which us used for AVIF and HEIC
    #first 4 bytes (they are now in $magic) must contain 32-bit Big Endian size of the 'ftyp' box (including size field and 'ftyp' mark)
    my $boxsize = unpack("N", $magic);
    if($boxsize>=16 && ($boxsize & 0x3)==0) { #minimum size of 'ftyp' box is 16 bytes and it must be multiple of 4
      #Structure of 'ftyp' box (from offset 8):
      #  uint32 major_brand;
      #  uint32 minor_version;
      #  uint32 compatible_brands[]; to end of the box
      my $brand = substr($data,8,4); #major_brand
      my %compat;
      if($boxsize>16) { #compatible_brands list is not empty
        %compat = map {$_=>1} unpack("(A4)*", substr($data,16,$boxsize-16));
      }
      return 'Avif' if $brand eq 'avif' || $compat{'avif'};
        #Consider recognizing 'avis' brand meaning AV1 image sequence
      return 'Heif' if $brand eq 'mif1' || $brand eq 'heic' || $brand eq 'heix' || $compat{'heic'} || $compat{'heix'} || $compat{'mif1'};
        #'mif1' stands for 'Multiple Image Format' and is general for the HEIF image container with any codec
        #'heic' indicates that HEVC Main Profile is utilized
        #'heix' indicates that HEVC Main 10 profile is utilized
        #Consider recognizing:
        #  'msf1' brand meaning 'Multiple Sequence Format' for general image sequence in HEIF
        #  'hevc' brand for HEVC Main Profile sequence
        #  'hevx' brand for HEVC Main 10 Profile sequence
    }
  }
  return 'Xpm'  if substr($data,0,9) eq "/* XPM */";
  return 'Xbm'  if substr($data,0,8) eq "#define ";
  return;
}
sub clone {
  croak("Usage: clone(\$image)") unless @_ == 1;
  my $self = shift;
  my ($x,$y) = $self->getBounds;
  my $new = $self->new($x,$y);
  return unless $new;
  $new->copy($self,0,0,0,0,$x,$y);
  return $new;
}
sub newFromPng {
    croak("Usage: newFromPng(class,filehandle,[truecolor])") unless @_>=2;
    my($class) = shift;
    my($f)     = shift;
    my $fh = $class->_make_filehandle($f);
    binmode($fh);
    $class->_newFromPng($fh,@_);
}
sub newFromJpeg {
    croak("Usage: newFromJpeg(class,filehandle,[truecolor])") unless @_>=2;
    my($class) = shift;
    my($f)     = shift;
    my $fh = $class->_make_filehandle($f);
    binmode($fh);
    $class->_newFromJpeg($fh,@_);
}
sub newFromGif {
    croak("Usage: newFromGif(class,filehandle)") unless @_==2;
    my($class) = shift;
    my($f)     = shift;
    my $fh = $class->_make_filehandle($f);
    binmode($fh);
    $class->_newFromGif($fh,@_);
}
sub newFromTiff {
    croak("Usage: newFromTiff(class,filehandle)") unless @_==2;
    my($class,$f) = @_;
    my $fh = $class->_make_filehandle($f);
    binmode($fh);
    $class->_newFromTiff($fh);
}
sub newFromXbm {
    croak("Usage: newFromXbm(class,filehandle)") unless @_==2;
    my($class,$f) = @_;
    my $fh = $class->_make_filehandle($f);
    binmode($fh);
    $class->_newFromXbm($fh);
}
sub newFromWebp {
    croak("Usage: newFromWebp(class,filehandle)") unless @_==2;
    my($class,$f) = @_;
    my $fh = $class->_make_filehandle($f);
    binmode($fh);
    $class->_newFromWebp($fh);
}
sub newFromAvif {
    croak("Usage: newFromAvif(class,filehandle)") unless @_==2;
    my($class,$f) = @_;
    my $fh = $class->_make_filehandle($f);
    binmode($fh);
    $class->_newFromAvif($fh);
}
sub newFromWBMP {
    croak("Usage: newFromWBMP(class,filehandle)") unless @_==2;
    my($class) = shift;
    my($f)     = shift;
    my $fh = $class->_make_filehandle($f);
    binmode($fh);
    $class->_newFromWBMP($fh,@_);
}
sub newFromBmp {
    croak("Usage: newFromBmp(class,filehandle)") unless @_==2;
    my($class) = shift;
    my($f)     = shift;
    my $fh = $class->_make_filehandle($f);
    binmode($fh);
    $class->_newFromBmp($fh,@_);
}
# Autoload methods go after __END__, and are processed by the autosplit program.
1;
__END__