|
|
- package Imager;
-
- use strict;
- use vars qw($VERSION @ISA @EXPORT @EXPORT_OK %EXPORT_TAGS %formats $DEBUG %filters %DSOs $ERRSTR $fontstate %OPCODES $I2P $FORMATGUESS $warn_obsolete);
- use IO::File;
-
- use Imager::Color;
- use Imager::Font;
-
- @EXPORT_OK = qw(
- init
- init_log
- DSO_open
- DSO_close
- DSO_funclist
- DSO_call
-
- load_plugin
- unload_plugin
-
- i_list_formats
- i_has_format
-
- i_color_new
- i_color_set
- i_color_info
-
- i_img_empty
- i_img_empty_ch
- i_img_exorcise
- i_img_destroy
-
- i_img_info
-
- i_img_setmask
- i_img_getmask
-
- i_line
- i_line_aa
- i_box
- i_box_filled
- i_arc
- i_circle_aa
-
- i_bezier_multi
- i_poly_aa
- i_poly_aa_cfill
-
- i_copyto
- i_rubthru
- i_scaleaxis
- i_scale_nn
- i_haar
- i_count_colors
-
- i_gaussian
- i_conv
-
- i_convert
- i_map
-
- i_img_diff
-
- i_init_fonts
- i_t1_new
- i_t1_destroy
- i_t1_set_aa
- i_t1_cp
- i_t1_text
- i_t1_bbox
-
- i_tt_set_aa
- i_tt_cp
- i_tt_text
- i_tt_bbox
-
- i_readjpeg_wiol
- i_writejpeg_wiol
-
- i_readtiff_wiol
- i_writetiff_wiol
- i_writetiff_wiol_faxable
-
- i_readpng_wiol
- i_writepng_wiol
-
- i_readgif
- i_readgif_wiol
- i_readgif_callback
- i_writegif
- i_writegifmc
- i_writegif_gen
- i_writegif_callback
-
- i_readpnm_wiol
- i_writeppm_wiol
-
- i_readraw_wiol
- i_writeraw_wiol
-
- i_contrast
- i_hardinvert
- i_noise
- i_bumpmap
- i_postlevels
- i_mosaic
- i_watermark
-
- malloc_state
-
- list_formats
-
- i_gifquant
-
- newfont
- newcolor
- newcolour
- NC
- NF
- );
-
- @EXPORT=qw(
- init_log
- i_list_formats
- i_has_format
- malloc_state
- i_color_new
-
- i_img_empty
- i_img_empty_ch
- );
-
- %EXPORT_TAGS=
- (handy => [qw(
- newfont
- newcolor
- NF
- NC
- )],
- all => [@EXPORT_OK],
- default => [qw(
- load_plugin
- unload_plugin
- )]);
-
- # registered file readers
- my %readers;
-
- # registered file writers
- my %writers;
-
- # modules we attempted to autoload
- my %attempted_to_load;
-
- BEGIN {
- require Exporter;
- @ISA = qw(Exporter);
- $VERSION = '0.60';
- eval {
- require XSLoader;
- XSLoader::load(Imager => $VERSION);
- 1;
- } or do {
- require DynaLoader;
- push @ISA, 'DynaLoader';
- bootstrap Imager $VERSION;
- }
- }
-
- BEGIN {
- i_init_fonts(); # Initialize font engines
- Imager::Font::__init();
- for(i_list_formats()) { $formats{$_}++; }
-
- if ($formats{'t1'}) {
- i_t1_set_aa(1);
- }
-
- if (!$formats{'t1'} and !$formats{'tt'}
- && !$formats{'ft2'} && !$formats{'w32'}) {
- $fontstate='no font support';
- }
-
- %OPCODES=(Add=>[0],Sub=>[1],Mult=>[2],Div=>[3],Parm=>[4],'sin'=>[5],'cos'=>[6],'x'=>[4,0],'y'=>[4,1]);
-
- $DEBUG=0;
-
- # the members of the subhashes under %filters are:
- # callseq - a list of the parameters to the underlying filter in the
- # order they are passed
- # callsub - a code ref that takes a named parameter list and calls the
- # underlying filter
- # defaults - a hash of default values
- # names - defines names for value of given parameters so if the names
- # field is foo=> { bar=>1 }, and the user supplies "bar" as the
- # foo parameter, the filter will receive 1 for the foo
- # parameter
- $filters{contrast}={
- callseq => ['image','intensity'],
- callsub => sub { my %hsh=@_; i_contrast($hsh{image},$hsh{intensity}); }
- };
-
- $filters{noise} ={
- callseq => ['image', 'amount', 'subtype'],
- defaults => { amount=>3,subtype=>0 },
- callsub => sub { my %hsh=@_; i_noise($hsh{image},$hsh{amount},$hsh{subtype}); }
- };
-
- $filters{hardinvert} ={
- callseq => ['image'],
- defaults => { },
- callsub => sub { my %hsh=@_; i_hardinvert($hsh{image}); }
- };
-
- $filters{autolevels} ={
- callseq => ['image','lsat','usat','skew'],
- defaults => { lsat=>0.1,usat=>0.1,skew=>0.0 },
- callsub => sub { my %hsh=@_; i_autolevels($hsh{image},$hsh{lsat},$hsh{usat},$hsh{skew}); }
- };
-
- $filters{turbnoise} ={
- callseq => ['image'],
- defaults => { xo=>0.0,yo=>0.0,scale=>10.0 },
- callsub => sub { my %hsh=@_; i_turbnoise($hsh{image},$hsh{xo},$hsh{yo},$hsh{scale}); }
- };
-
- $filters{radnoise} ={
- callseq => ['image'],
- defaults => { xo=>100,yo=>100,ascale=>17.0,rscale=>0.02 },
- callsub => sub { my %hsh=@_; i_radnoise($hsh{image},$hsh{xo},$hsh{yo},$hsh{rscale},$hsh{ascale}); }
- };
-
- $filters{conv} ={
- callseq => ['image', 'coef'],
- defaults => { },
- callsub => sub { my %hsh=@_; i_conv($hsh{image},$hsh{coef}); }
- };
-
- $filters{gradgen} =
- {
- callseq => ['image', 'xo', 'yo', 'colors', 'dist'],
- defaults => { dist => 0 },
- callsub =>
- sub {
- my %hsh=@_;
- my @colors = @{$hsh{colors}};
- $_ = _color($_)
- for @colors;
- i_gradgen($hsh{image}, $hsh{xo}, $hsh{yo}, \@colors, $hsh{dist});
- }
- };
-
- $filters{nearest_color} =
- {
- callseq => ['image', 'xo', 'yo', 'colors', 'dist'],
- defaults => { },
- callsub =>
- sub {
- my %hsh=@_;
- # make sure the segments are specified with colors
- my @colors;
- for my $color (@{$hsh{colors}}) {
- my $new_color = _color($color)
- or die $Imager::ERRSTR."\n";
- push @colors, $new_color;
- }
-
- i_nearest_color($hsh{image}, $hsh{xo}, $hsh{yo}, \@colors,
- $hsh{dist})
- or die Imager->_error_as_msg() . "\n";
- },
- };
- $filters{gaussian} = {
- callseq => [ 'image', 'stddev' ],
- defaults => { },
- callsub => sub { my %hsh = @_; i_gaussian($hsh{image}, $hsh{stddev}); },
- };
- $filters{mosaic} =
- {
- callseq => [ qw(image size) ],
- defaults => { size => 20 },
- callsub => sub { my %hsh = @_; i_mosaic($hsh{image}, $hsh{size}) },
- };
- $filters{bumpmap} =
- {
- callseq => [ qw(image bump elevation lightx lighty st) ],
- defaults => { elevation=>0, st=> 2 },
- callsub => sub {
- my %hsh = @_;
- i_bumpmap($hsh{image}, $hsh{bump}{IMG}, $hsh{elevation},
- $hsh{lightx}, $hsh{lighty}, $hsh{st});
- },
- };
- $filters{bumpmap_complex} =
- {
- callseq => [ qw(image bump channel tx ty Lx Ly Lz cd cs n Ia Il Is) ],
- defaults => {
- channel => 0,
- tx => 0,
- ty => 0,
- Lx => 0.2,
- Ly => 0.4,
- Lz => -1.0,
- cd => 1.0,
- cs => 40,
- n => 1.3,
- Ia => Imager::Color->new(rgb=>[0,0,0]),
- Il => Imager::Color->new(rgb=>[255,255,255]),
- Is => Imager::Color->new(rgb=>[255,255,255]),
- },
- callsub => sub {
- my %hsh = @_;
- i_bumpmap_complex($hsh{image}, $hsh{bump}{IMG}, $hsh{channel},
- $hsh{tx}, $hsh{ty}, $hsh{Lx}, $hsh{Ly}, $hsh{Lz},
- $hsh{cd}, $hsh{cs}, $hsh{n}, $hsh{Ia}, $hsh{Il},
- $hsh{Is});
- },
- };
- $filters{postlevels} =
- {
- callseq => [ qw(image levels) ],
- defaults => { levels => 10 },
- callsub => sub { my %hsh = @_; i_postlevels($hsh{image}, $hsh{levels}); },
- };
- $filters{watermark} =
- {
- callseq => [ qw(image wmark tx ty pixdiff) ],
- defaults => { pixdiff=>10, tx=>0, ty=>0 },
- callsub =>
- sub {
- my %hsh = @_;
- i_watermark($hsh{image}, $hsh{wmark}{IMG}, $hsh{tx}, $hsh{ty},
- $hsh{pixdiff});
- },
- };
- $filters{fountain} =
- {
- callseq => [ qw(image xa ya xb yb ftype repeat combine super_sample ssample_param segments) ],
- names => {
- ftype => { linear => 0,
- bilinear => 1,
- radial => 2,
- radial_square => 3,
- revolution => 4,
- conical => 5 },
- repeat => { none => 0,
- sawtooth => 1,
- triangle => 2,
- saw_both => 3,
- tri_both => 4,
- },
- super_sample => {
- none => 0,
- grid => 1,
- random => 2,
- circle => 3,
- },
- combine => {
- none => 0,
- normal => 1,
- multiply => 2, mult => 2,
- dissolve => 3,
- add => 4,
- subtract => 5, 'sub' => 5,
- diff => 6,
- lighten => 7,
- darken => 8,
- hue => 9,
- sat => 10,
- value => 11,
- color => 12,
- },
- },
- defaults => { ftype => 0, repeat => 0, combine => 0,
- super_sample => 0, ssample_param => 4,
- segments=>[
- [ 0, 0.5, 1,
- Imager::Color->new(0,0,0),
- Imager::Color->new(255, 255, 255),
- 0, 0,
- ],
- ],
- },
- callsub =>
- sub {
- my %hsh = @_;
-
- # make sure the segments are specified with colors
- my @segments;
- for my $segment (@{$hsh{segments}}) {
- my @new_segment = @$segment;
-
- $_ = _color($_) or die $Imager::ERRSTR."\n" for @new_segment[3,4];
- push @segments, \@new_segment;
- }
-
- i_fountain($hsh{image}, $hsh{xa}, $hsh{ya}, $hsh{xb}, $hsh{yb},
- $hsh{ftype}, $hsh{repeat}, $hsh{combine}, $hsh{super_sample},
- $hsh{ssample_param}, \@segments)
- or die Imager->_error_as_msg() . "\n";
- },
- };
- $filters{unsharpmask} =
- {
- callseq => [ qw(image stddev scale) ],
- defaults => { stddev=>2.0, scale=>1.0 },
- callsub =>
- sub {
- my %hsh = @_;
- i_unsharp_mask($hsh{image}, $hsh{stddev}, $hsh{scale});
- },
- };
-
- $FORMATGUESS=\&def_guess_type;
-
- $warn_obsolete = 1;
- }
-
- #
- # Non methods
- #
-
- # initlize Imager
- # NOTE: this might be moved to an import override later on
-
- #sub import {
- # my $pack = shift;
- # (look through @_ for special tags, process, and remove them);
- # use Data::Dumper;
- # print Dumper($pack);
- # print Dumper(@_);
- #}
-
- sub init_log {
- i_init_log($_[0],$_[1]);
- i_log_entry("Imager $VERSION starting\n", 1);
- }
-
-
- sub init {
- my %parms=(loglevel=>1,@_);
- if ($parms{'log'}) {
- init_log($parms{'log'},$parms{'loglevel'});
- }
-
- if (exists $parms{'warn_obsolete'}) {
- $warn_obsolete = $parms{'warn_obsolete'};
- }
-
- # if ($parms{T1LIB_CONFIG}) { $ENV{T1LIB_CONFIG}=$parms{T1LIB_CONFIG}; }
- # if ( $ENV{T1LIB_CONFIG} and ( $fontstate eq 'missing conf' )) {
- # i_init_fonts();
- # $fontstate='ok';
- # }
- if (exists $parms{'t1log'}) {
- i_init_fonts($parms{'t1log'});
- }
- }
-
- END {
- if ($DEBUG) {
- print "shutdown code\n";
- # for(keys %instances) { $instances{$_}->DESTROY(); }
- malloc_state(); # how do decide if this should be used? -- store something from the import
- print "Imager exiting\n";
- }
- }
-
- # Load a filter plugin
-
- sub load_plugin {
- my ($filename)=@_;
- my $i;
- my ($DSO_handle,$str)=DSO_open($filename);
- if (!defined($DSO_handle)) { $Imager::ERRSTR="Couldn't load plugin '$filename'\n"; return undef; }
- my %funcs=DSO_funclist($DSO_handle);
- if ($DEBUG) { print "loading module $filename\n"; $i=0; for(keys %funcs) { printf(" %2d: %s\n",$i++,$_); } }
- $i=0;
- for(keys %funcs) { if ($filters{$_}) { $ERRSTR="filter '$_' already exists\n"; DSO_close($DSO_handle); return undef; } }
-
- $DSOs{$filename}=[$DSO_handle,\%funcs];
-
- for(keys %funcs) {
- my $evstr="\$filters{'".$_."'}={".$funcs{$_}.'};';
- $DEBUG && print "eval string:\n",$evstr,"\n";
- eval $evstr;
- print $@ if $@;
- }
- return 1;
- }
-
- # Unload a plugin
-
- sub unload_plugin {
- my ($filename)=@_;
-
- if (!$DSOs{$filename}) { $ERRSTR="plugin '$filename' not loaded."; return undef; }
- my ($DSO_handle,$funcref)=@{$DSOs{$filename}};
- for(keys %{$funcref}) {
- delete $filters{$_};
- $DEBUG && print "unloading: $_\n";
- }
- my $rc=DSO_close($DSO_handle);
- if (!defined($rc)) { $ERRSTR="unable to unload plugin '$filename'."; return undef; }
- return 1;
- }
-
- # take the results of i_error() and make a message out of it
- sub _error_as_msg {
- return join(": ", map $_->[0], i_errors());
- }
-
- # this function tries to DWIM for color parameters
- # color objects are used as is
- # simple scalars are simply treated as single parameters to Imager::Color->new
- # hashrefs are treated as named argument lists to Imager::Color->new
- # arrayrefs are treated as list arguments to Imager::Color->new iff any
- # parameter is > 1
- # other arrayrefs are treated as list arguments to Imager::Color::Float
-
- sub _color {
- my $arg = shift;
- # perl 5.6.0 seems to do weird things to $arg if we don't make an
- # explicitly stringified copy
- # I vaguely remember a bug on this on p5p, but couldn't find it
- # through bugs.perl.org (I had trouble getting it to find any bugs)
- my $copy = $arg . "";
- my $result;
-
- if (ref $arg) {
- if (UNIVERSAL::isa($arg, "Imager::Color")
- || UNIVERSAL::isa($arg, "Imager::Color::Float")) {
- $result = $arg;
- }
- else {
- if ($copy =~ /^HASH\(/) {
- $result = Imager::Color->new(%$arg);
- }
- elsif ($copy =~ /^ARRAY\(/) {
- $result = Imager::Color->new(@$arg);
- }
- else {
- $Imager::ERRSTR = "Not a color";
- }
- }
- }
- else {
- # assume Imager::Color::new knows how to handle it
- $result = Imager::Color->new($arg);
- }
-
- return $result;
- }
-
- sub _valid_image {
- my ($self) = @_;
-
- $self->{IMG} and return 1;
-
- $self->_set_error('empty input image');
-
- return;
- }
-
- #
- # Methods to be called on objects.
- #
-
- # Create a new Imager object takes very few parameters.
- # usually you call this method and then call open from
- # the resulting object
-
- sub new {
- my $class = shift;
- my $self ={};
- my %hsh=@_;
- bless $self,$class;
- $self->{IMG}=undef; # Just to indicate what exists
- $self->{ERRSTR}=undef; #
- $self->{DEBUG}=$DEBUG;
- $self->{DEBUG} && print "Initialized Imager\n";
- if (defined $hsh{xsize} && defined $hsh{ysize}) {
- unless ($self->img_set(%hsh)) {
- $Imager::ERRSTR = $self->{ERRSTR};
- return;
- }
- }
- return $self;
- }
-
- # Copy an entire image with no changes
- # - if an image has magic the copy of it will not be magical
-
- sub copy {
- my $self = shift;
- unless ($self->{IMG}) { $self->{ERRSTR}='empty input image'; return undef; }
-
- unless (defined wantarray) {
- my @caller = caller;
- warn "copy() called in void context - copy() returns the copied image at $caller[1] line $caller[2]\n";
- return;
- }
-
- my $newcopy=Imager->new();
- $newcopy->{IMG} = i_copy($self->{IMG});
- return $newcopy;
- }
-
- # Paste a region
-
- sub paste {
- my $self = shift;
-
- unless ($self->{IMG}) {
- $self->_set_error('empty input image');
- return;
- }
- my %input=(left=>0, top=>0, src_minx => 0, src_miny => 0, @_);
- my $src = $input{img} || $input{src};
- unless($src) {
- $self->_set_error("no source image");
- return;
- }
- $input{left}=0 if $input{left} <= 0;
- $input{top}=0 if $input{top} <= 0;
-
- my($r,$b)=i_img_info($src->{IMG});
- my ($src_left, $src_top) = @input{qw/src_minx src_miny/};
- my ($src_right, $src_bottom);
- if ($input{src_coords}) {
- ($src_left, $src_top, $src_right, $src_bottom) = @{$input{src_coords}}
- }
- else {
- if (defined $input{src_maxx}) {
- $src_right = $input{src_maxx};
- }
- elsif (defined $input{width}) {
- if ($input{width} <= 0) {
- $self->_set_error("paste: width must me positive");
- return;
- }
- $src_right = $src_left + $input{width};
- }
- else {
- $src_right = $r;
- }
- if (defined $input{src_maxy}) {
- $src_bottom = $input{src_maxy};
- }
- elsif (defined $input{height}) {
- if ($input{height} < 0) {
- $self->_set_error("paste: height must be positive");
- return;
- }
- $src_bottom = $src_top + $input{height};
- }
- else {
- $src_bottom = $b;
- }
- }
-
- $src_right > $r and $src_right = $r;
- $src_bottom > $b and $src_bottom = $b;
-
- if ($src_right <= $src_left
- || $src_bottom < $src_top) {
- $self->_set_error("nothing to paste");
- return;
- }
-
- i_copyto($self->{IMG}, $src->{IMG},
- $src_left, $src_top, $src_right, $src_bottom,
- $input{left}, $input{top});
-
- return $self; # What should go here??
- }
-
- # Crop an image - i.e. return a new image that is smaller
-
- sub crop {
- my $self=shift;
- unless ($self->{IMG}) { $self->{ERRSTR}='empty input image'; return undef; }
-
- unless (defined wantarray) {
- my @caller = caller;
- warn "crop() called in void context - crop() returns the cropped image at $caller[1] line $caller[2]\n";
- return;
- }
-
- my %hsh=@_;
-
- my ($w, $h, $l, $r, $b, $t) =
- @hsh{qw(width height left right bottom top)};
-
- # work through the various possibilities
- if (defined $l) {
- if (defined $w) {
- $r = $l + $w;
- }
- elsif (!defined $r) {
- $r = $self->getwidth;
- }
- }
- elsif (defined $r) {
- if (defined $w) {
- $l = $r - $w;
- }
- else {
- $l = 0;
- }
- }
- elsif (defined $w) {
- $l = int(0.5+($self->getwidth()-$w)/2);
- $r = $l + $w;
- }
- else {
- $l = 0;
- $r = $self->getwidth;
- }
- if (defined $t) {
- if (defined $h) {
- $b = $t + $h;
- }
- elsif (!defined $b) {
- $b = $self->getheight;
- }
- }
- elsif (defined $b) {
- if (defined $h) {
- $t = $b - $h;
- }
- else {
- $t = 0;
- }
- }
- elsif (defined $h) {
- $t=int(0.5+($self->getheight()-$h)/2);
- $b=$t+$h;
- }
- else {
- $t = 0;
- $b = $self->getheight;
- }
-
- ($l,$r)=($r,$l) if $l>$r;
- ($t,$b)=($b,$t) if $t>$b;
-
- $l < 0 and $l = 0;
- $r > $self->getwidth and $r = $self->getwidth;
- $t < 0 and $t = 0;
- $b > $self->getheight and $b = $self->getheight;
-
- if ($l == $r || $t == $b) {
- $self->_set_error("resulting image would have no content");
- return;
- }
- if( $r < $l or $b < $t ) {
- $self->_set_error("attempting to crop outside of the image");
- return;
- }
- my $dst = $self->_sametype(xsize=>$r-$l, ysize=>$b-$t);
-
- i_copyto($dst->{IMG},$self->{IMG},$l,$t,$r,$b,0,0);
- return $dst;
- }
-
- sub _sametype {
- my ($self, %opts) = @_;
-
- $self->{IMG} or return $self->_set_error("Not a valid image");
-
- my $x = $opts{xsize} || $self->getwidth;
- my $y = $opts{ysize} || $self->getheight;
- my $channels = $opts{channels} || $self->getchannels;
-
- my $out = Imager->new;
- if ($channels == $self->getchannels) {
- $out->{IMG} = i_sametype($self->{IMG}, $x, $y);
- }
- else {
- $out->{IMG} = i_sametype_chans($self->{IMG}, $x, $y, $channels);
- }
- unless ($out->{IMG}) {
- $self->{ERRSTR} = $self->_error_as_msg;
- return;
- }
-
- return $out;
- }
-
- # Sets an image to a certain size and channel number
- # if there was previously data in the image it is discarded
-
- sub img_set {
- my $self=shift;
-
- my %hsh=(xsize=>100, ysize=>100, channels=>3, bits=>8, type=>'direct', @_);
-
- if (defined($self->{IMG})) {
- # let IIM_DESTROY destroy it, it's possible this image is
- # referenced from a virtual image (like masked)
- #i_img_destroy($self->{IMG});
- undef($self->{IMG});
- }
-
- if ($hsh{type} eq 'paletted' || $hsh{type} eq 'pseudo') {
- $self->{IMG} = i_img_pal_new($hsh{xsize}, $hsh{ysize}, $hsh{channels},
- $hsh{maxcolors} || 256);
- }
- elsif ($hsh{bits} eq 'double') {
- $self->{IMG} = i_img_double_new($hsh{xsize}, $hsh{ysize}, $hsh{channels});
- }
- elsif ($hsh{bits} == 16) {
- $self->{IMG} = i_img_16_new($hsh{xsize}, $hsh{ysize}, $hsh{channels});
- }
- else {
- $self->{IMG}=Imager::ImgRaw::new($hsh{'xsize'}, $hsh{'ysize'},
- $hsh{'channels'});
- }
-
- unless ($self->{IMG}) {
- $self->{ERRSTR} = Imager->_error_as_msg();
- return;
- }
-
- $self;
- }
-
- # created a masked version of the current image
- sub masked {
- my $self = shift;
-
- $self or return undef;
- my %opts = (left => 0,
- top => 0,
- right => $self->getwidth,
- bottom => $self->getheight,
- @_);
- my $mask = $opts{mask} ? $opts{mask}{IMG} : undef;
-
- my $result = Imager->new;
- $result->{IMG} = i_img_masked_new($self->{IMG}, $mask, $opts{left},
- $opts{top}, $opts{right} - $opts{left},
- $opts{bottom} - $opts{top});
- # keep references to the mask and base images so they don't
- # disappear on us
- $result->{DEPENDS} = [ $self->{IMG}, $mask ];
-
- $result;
- }
-
- # convert an RGB image into a paletted image
- sub to_paletted {
- my $self = shift;
- my $opts;
- if (@_ != 1 && !ref $_[0]) {
- $opts = { @_ };
- }
- else {
- $opts = shift;
- }
-
- unless (defined wantarray) {
- my @caller = caller;
- warn "to_paletted() called in void context - to_paletted() returns the converted image at $caller[1] line $caller[2]\n";
- return;
- }
-
- my $result = Imager->new;
- $result->{IMG} = i_img_to_pal($self->{IMG}, $opts);
-
- #print "Type ", i_img_type($result->{IMG}), "\n";
-
- if ($result->{IMG}) {
- return $result;
- }
- else {
- $self->{ERRSTR} = $self->_error_as_msg;
- return;
- }
- }
-
- # convert a paletted (or any image) to an 8-bit/channel RGB images
- sub to_rgb8 {
- my $self = shift;
- my $result;
-
- unless (defined wantarray) {
- my @caller = caller;
- warn "to_rgb8() called in void context - to_rgb8() returns the converted image at $caller[1] line $caller[2]\n";
- return;
- }
-
- if ($self->{IMG}) {
- $result = Imager->new;
- $result->{IMG} = i_img_to_rgb($self->{IMG})
- or undef $result;
- }
-
- return $result;
- }
-
- # convert a paletted (or any image) to an 8-bit/channel RGB images
- sub to_rgb16 {
- my $self = shift;
- my $result;
-
- unless (defined wantarray) {
- my @caller = caller;
- warn "to_rgb16() called in void context - to_rgb8() returns the converted image at $caller[1] line $caller[2]\n";
- return;
- }
-
- if ($self->{IMG}) {
- $result = Imager->new;
- $result->{IMG} = i_img_to_rgb16($self->{IMG})
- or undef $result;
- }
-
- return $result;
- }
-
- sub addcolors {
- my $self = shift;
- my %opts = (colors=>[], @_);
-
- unless ($self->{IMG}) {
- $self->_set_error("empty input image");
- return;
- }
-
- my @colors = @{$opts{colors}}
- or return undef;
-
- for my $color (@colors) {
- $color = _color($color);
- unless ($color) {
- $self->_set_error($Imager::ERRSTR);
- return;
- }
- }
-
- return i_addcolors($self->{IMG}, @colors);
- }
-
- sub setcolors {
- my $self = shift;
- my %opts = (start=>0, colors=>[], @_);
-
- unless ($self->{IMG}) {
- $self->_set_error("empty input image");
- return;
- }
-
- my @colors = @{$opts{colors}}
- or return undef;
-
- for my $color (@colors) {
- $color = _color($color);
- unless ($color) {
- $self->_set_error($Imager::ERRSTR);
- return;
- }
- }
-
- return i_setcolors($self->{IMG}, $opts{start}, @colors);
- }
-
- sub getcolors {
- my $self = shift;
- my %opts = @_;
- if (!exists $opts{start} && !exists $opts{count}) {
- # get them all
- $opts{start} = 0;
- $opts{count} = $self->colorcount;
- }
- elsif (!exists $opts{count}) {
- $opts{count} = 1;
- }
- elsif (!exists $opts{start}) {
- $opts{start} = 0;
- }
-
- $self->{IMG} and
- return i_getcolors($self->{IMG}, $opts{start}, $opts{count});
- }
-
- sub colorcount {
- i_colorcount($_[0]{IMG});
- }
-
- sub maxcolors {
- i_maxcolors($_[0]{IMG});
- }
-
- sub findcolor {
- my $self = shift;
- my %opts = @_;
- $opts{color} or return undef;
-
- $self->{IMG} and i_findcolor($self->{IMG}, $opts{color});
- }
-
- sub bits {
- my $self = shift;
- my $bits = $self->{IMG} && i_img_bits($self->{IMG});
- if ($bits && $bits == length(pack("d", 1)) * 8) {
- $bits = 'double';
- }
- $bits;
- }
-
- sub type {
- my $self = shift;
- if ($self->{IMG}) {
- return i_img_type($self->{IMG}) ? "paletted" : "direct";
- }
- }
-
- sub virtual {
- my $self = shift;
- $self->{IMG} and i_img_virtual($self->{IMG});
- }
-
- sub tags {
- my ($self, %opts) = @_;
-
- $self->{IMG} or return;
-
- if (defined $opts{name}) {
- my @result;
- my $start = 0;
- my $found;
- while (defined($found = i_tags_find($self->{IMG}, $opts{name}, $start))) {
- push @result, (i_tags_get($self->{IMG}, $found))[1];
- $start = $found+1;
- }
- return wantarray ? @result : $result[0];
- }
- elsif (defined $opts{code}) {
- my @result;
- my $start = 0;
- my $found;
- while (defined($found = i_tags_findn($self->{IMG}, $opts{code}, $start))) {
- push @result, (i_tags_get($self->{IMG}, $found))[1];
- $start = $found+1;
- }
- return @result;
- }
- else {
- if (wantarray) {
- return map { [ i_tags_get($self->{IMG}, $_) ] } 0.. i_tags_count($self->{IMG})-1;
- }
- else {
- return i_tags_count($self->{IMG});
- }
- }
- }
-
- sub addtag {
- my $self = shift;
- my %opts = @_;
-
- return -1 unless $self->{IMG};
- if ($opts{name}) {
- if (defined $opts{value}) {
- if ($opts{value} =~ /^\d+$/) {
- # add as a number
- return i_tags_addn($self->{IMG}, $opts{name}, 0, $opts{value});
- }
- else {
- return i_tags_add($self->{IMG}, $opts{name}, 0, $opts{value}, 0);
- }
- }
- elsif (defined $opts{data}) {
- # force addition as a string
- return i_tags_add($self->{IMG}, $opts{name}, 0, $opts{data}, 0);
- }
- else {
- $self->{ERRSTR} = "No value supplied";
- return undef;
- }
- }
- elsif ($opts{code}) {
- if (defined $opts{value}) {
- if ($opts{value} =~ /^\d+$/) {
- # add as a number
- return i_tags_addn($self->{IMG}, $opts{code}, 0, $opts{value});
- }
- else {
- return i_tags_add($self->{IMG}, $opts{code}, 0, $opts{value}, 0);
- }
- }
- elsif (defined $opts{data}) {
- # force addition as a string
- return i_tags_add($self->{IMG}, $opts{code}, 0, $opts{data}, 0);
- }
- else {
- $self->{ERRSTR} = "No value supplied";
- return undef;
- }
- }
- else {
- return undef;
- }
- }
-
- sub deltag {
- my $self = shift;
- my %opts = @_;
-
- return 0 unless $self->{IMG};
-
- if (defined $opts{'index'}) {
- return i_tags_delete($self->{IMG}, $opts{'index'});
- }
- elsif (defined $opts{name}) {
- return i_tags_delbyname($self->{IMG}, $opts{name});
- }
- elsif (defined $opts{code}) {
- return i_tags_delbycode($self->{IMG}, $opts{code});
- }
- else {
- $self->{ERRSTR} = "Need to supply index, name, or code parameter";
- return 0;
- }
- }
-
- sub settag {
- my ($self, %opts) = @_;
-
- if ($opts{name}) {
- $self->deltag(name=>$opts{name});
- return $self->addtag(name=>$opts{name}, value=>$opts{value});
- }
- elsif (defined $opts{code}) {
- $self->deltag(code=>$opts{code});
- return $self->addtag(code=>$opts{code}, value=>$opts{value});
- }
- else {
- return undef;
- }
- }
-
-
- sub _get_reader_io {
- my ($self, $input) = @_;
-
- if ($input->{io}) {
- return $input->{io}, undef;
- }
- elsif ($input->{fd}) {
- return io_new_fd($input->{fd});
- }
- elsif ($input->{fh}) {
- my $fd = fileno($input->{fh});
- unless ($fd) {
- $self->_set_error("Handle in fh option not opened");
- return;
- }
- return io_new_fd($fd);
- }
- elsif ($input->{file}) {
- my $file = IO::File->new($input->{file}, "r");
- unless ($file) {
- $self->_set_error("Could not open $input->{file}: $!");
- return;
- }
- binmode $file;
- return (io_new_fd(fileno($file)), $file);
- }
- elsif ($input->{data}) {
- return io_new_buffer($input->{data});
- }
- elsif ($input->{callback} || $input->{readcb}) {
- if (!$input->{seekcb}) {
- $self->_set_error("Need a seekcb parameter");
- }
- if ($input->{maxbuffer}) {
- return io_new_cb($input->{writecb},
- $input->{callback} || $input->{readcb},
- $input->{seekcb}, $input->{closecb},
- $input->{maxbuffer});
- }
- else {
- return io_new_cb($input->{writecb},
- $input->{callback} || $input->{readcb},
- $input->{seekcb}, $input->{closecb});
- }
- }
- else {
- $self->_set_error("file/fd/fh/data/callback parameter missing");
- return;
- }
- }
-
- sub _get_writer_io {
- my ($self, $input, $type) = @_;
-
- if ($input->{io}) {
- return $input->{io};
- }
- elsif ($input->{fd}) {
- return io_new_fd($input->{fd});
- }
- elsif ($input->{fh}) {
- my $fd = fileno($input->{fh});
- unless ($fd) {
- $self->_set_error("Handle in fh option not opened");
- return;
- }
- # flush it
- my $oldfh = select($input->{fh});
- # flush anything that's buffered, and make sure anything else is flushed
- $| = 1;
- select($oldfh);
- return io_new_fd($fd);
- }
- elsif ($input->{file}) {
- my $fh = new IO::File($input->{file},"w+");
- unless ($fh) {
- $self->_set_error("Could not open file $input->{file}: $!");
- return;
- }
- binmode($fh) or die;
- return (io_new_fd(fileno($fh)), $fh);
- }
- elsif ($input->{data}) {
- return io_new_bufchain();
- }
- elsif ($input->{callback} || $input->{writecb}) {
- if ($input->{maxbuffer}) {
- return io_new_cb($input->{callback} || $input->{writecb},
- $input->{readcb},
- $input->{seekcb}, $input->{closecb},
- $input->{maxbuffer});
- }
- else {
- return io_new_cb($input->{callback} || $input->{writecb},
- $input->{readcb},
- $input->{seekcb}, $input->{closecb});
- }
- }
- else {
- $self->_set_error("file/fd/fh/data/callback parameter missing");
- return;
- }
- }
-
- # Read an image from file
-
- sub read {
- my $self = shift;
- my %input=@_;
-
- if (defined($self->{IMG})) {
- # let IIM_DESTROY do the destruction, since the image may be
- # referenced from elsewhere
- #i_img_destroy($self->{IMG});
- undef($self->{IMG});
- }
-
- my ($IO, $fh) = $self->_get_reader_io(\%input) or return;
-
- unless ($input{'type'}) {
- $input{'type'} = i_test_format_probe($IO, -1);
- }
-
- unless ($input{'type'}) {
- $self->_set_error('type parameter missing and not possible to guess from extension');
- return undef;
- }
-
- _reader_autoload($input{type});
-
- if ($readers{$input{type}} && $readers{$input{type}}{single}) {
- return $readers{$input{type}}{single}->($self, $IO, %input);
- }
-
- unless ($formats{$input{'type'}}) {
- $self->_set_error("format '$input{'type'}' not supported");
- return;
- }
-
- # Setup data source
- if ( $input{'type'} eq 'jpeg' ) {
- ($self->{IMG},$self->{IPTCRAW}) = i_readjpeg_wiol( $IO );
- if ( !defined($self->{IMG}) ) {
- $self->{ERRSTR}=$self->_error_as_msg(); return undef;
- }
- $self->{DEBUG} && print "loading a jpeg file\n";
- return $self;
- }
-
- my $allow_incomplete = $input{allow_incomplete};
- defined $allow_incomplete or $allow_incomplete = 0;
-
- if ( $input{'type'} eq 'tiff' ) {
- my $page = $input{'page'};
- defined $page or $page = 0;
- $self->{IMG}=i_readtiff_wiol( $IO, $allow_incomplete, $page );
- if ( !defined($self->{IMG}) ) {
- $self->{ERRSTR}=$self->_error_as_msg(); return undef;
- }
- $self->{DEBUG} && print "loading a tiff file\n";
- return $self;
- }
-
- if ( $input{'type'} eq 'pnm' ) {
- $self->{IMG}=i_readpnm_wiol( $IO, $allow_incomplete );
- if ( !defined($self->{IMG}) ) {
- $self->{ERRSTR}='unable to read pnm image: '._error_as_msg();
- return undef;
- }
- $self->{DEBUG} && print "loading a pnm file\n";
- return $self;
- }
-
- if ( $input{'type'} eq 'png' ) {
- $self->{IMG}=i_readpng_wiol( $IO, -1 ); # Fixme, check if that length parameter is ever needed
- if ( !defined($self->{IMG}) ) {
- $self->{ERRSTR} = $self->_error_as_msg();
- return undef;
- }
- $self->{DEBUG} && print "loading a png file\n";
- }
-
- if ( $input{'type'} eq 'bmp' ) {
- $self->{IMG}=i_readbmp_wiol( $IO, $allow_incomplete );
- if ( !defined($self->{IMG}) ) {
- $self->{ERRSTR}=$self->_error_as_msg();
- return undef;
- }
- $self->{DEBUG} && print "loading a bmp file\n";
- }
-
- if ( $input{'type'} eq 'gif' ) {
- if ($input{colors} && !ref($input{colors})) {
- # must be a reference to a scalar that accepts the colour map
- $self->{ERRSTR} = "option 'colors' must be a scalar reference";
- return undef;
- }
- if ($input{'gif_consolidate'}) {
- if ($input{colors}) {
- my $colors;
- ($self->{IMG}, $colors) =i_readgif_wiol( $IO );
- if ($colors) {
- ${ $input{colors} } = [ map { NC(@$_) } @$colors ];
- }
- }
- else {
- $self->{IMG} =i_readgif_wiol( $IO );
- }
- }
- else {
- my $page = $input{'page'};
- defined $page or $page = 0;
- $self->{IMG} = i_readgif_single_wiol( $IO, $page );
- if ($self->{IMG} && $input{colors}) {
- ${ $input{colors} } =
- [ i_getcolors($self->{IMG}, 0, i_colorcount($self->{IMG})) ];
- }
- }
-
- if ( !defined($self->{IMG}) ) {
- $self->{ERRSTR}=$self->_error_as_msg();
- return undef;
- }
- $self->{DEBUG} && print "loading a gif file\n";
- }
-
- if ( $input{'type'} eq 'tga' ) {
- $self->{IMG}=i_readtga_wiol( $IO, -1 ); # Fixme, check if that length parameter is ever needed
- if ( !defined($self->{IMG}) ) {
- $self->{ERRSTR}=$self->_error_as_msg();
- return undef;
- }
- $self->{DEBUG} && print "loading a tga file\n";
- }
-
- if ( $input{'type'} eq 'raw' ) {
- my %params=(datachannels=>3,storechannels=>3,interleave=>1,%input);
-
- if ( !($params{xsize} && $params{ysize}) ) {
- $self->{ERRSTR}='missing xsize or ysize parameter for raw';
- return undef;
- }
-
- $self->{IMG} = i_readraw_wiol( $IO,
- $params{xsize},
- $params{ysize},
- $params{datachannels},
- $params{storechannels},
- $params{interleave});
- if ( !defined($self->{IMG}) ) {
- $self->{ERRSTR}=$self->_error_as_msg();
- return undef;
- }
- $self->{DEBUG} && print "loading a raw file\n";
- }
-
- return $self;
- }
-
- sub register_reader {
- my ($class, %opts) = @_;
-
- defined $opts{type}
- or die "register_reader called with no type parameter\n";
-
- my $type = $opts{type};
-
- defined $opts{single} || defined $opts{multiple}
- or die "register_reader called with no single or multiple parameter\n";
-
- $readers{$type} = { };
- if ($opts{single}) {
- $readers{$type}{single} = $opts{single};
- }
- if ($opts{multiple}) {
- $readers{$type}{multiple} = $opts{multiple};
- }
-
- return 1;
- }
-
- sub register_writer {
- my ($class, %opts) = @_;
-
- defined $opts{type}
- or die "register_writer called with no type parameter\n";
-
- my $type = $opts{type};
-
- defined $opts{single} || defined $opts{multiple}
- or die "register_writer called with no single or multiple parameter\n";
-
- $writers{$type} = { };
- if ($opts{single}) {
- $writers{$type}{single} = $opts{single};
- }
- if ($opts{multiple}) {
- $writers{$type}{multiple} = $opts{multiple};
- }
-
- return 1;
- }
-
- # probes for an Imager::File::whatever module
- sub _reader_autoload {
- my $type = shift;
-
- return if $formats{$type} || $readers{$type};
-
- return unless $type =~ /^\w+$/;
-
- my $file = "Imager/File/\U$type\E.pm";
-
- unless ($attempted_to_load{$file}) {
- eval {
- ++$attempted_to_load{$file};
- require $file;
- };
- if ($@) {
- # try to get a reader specific module
- my $file = "Imager/File/\U$type\EReader.pm";
- unless ($attempted_to_load{$file}) {
- eval {
- ++$attempted_to_load{$file};
- require $file;
- };
- }
- }
- }
- }
-
- # probes for an Imager::File::whatever module
- sub _writer_autoload {
- my $type = shift;
-
- return if $formats{$type} || $readers{$type};
-
- return unless $type =~ /^\w+$/;
-
- my $file = "Imager/File/\U$type\E.pm";
-
- unless ($attempted_to_load{$file}) {
- eval {
- ++$attempted_to_load{$file};
- require $file;
- };
- if ($@) {
- # try to get a writer specific module
- my $file = "Imager/File/\U$type\EWriter.pm";
- unless ($attempted_to_load{$file}) {
- eval {
- ++$attempted_to_load{$file};
- require $file;
- };
- }
- }
- }
- }
-
- sub _fix_gif_positions {
- my ($opts, $opt, $msg, @imgs) = @_;
-
- my $positions = $opts->{'gif_positions'};
- my $index = 0;
- for my $pos (@$positions) {
- my ($x, $y) = @$pos;
- my $img = $imgs[$index++];
- $img->settag(name=>'gif_left', value=>$x);
- $img->settag(name=>'gif_top', value=>$y) if defined $y;
- }
- $$msg .= "replaced with the gif_left and gif_top tags";
- }
-
- my %obsolete_opts =
- (
- gif_each_palette=>'gif_local_map',
- interlace => 'gif_interlace',
- gif_delays => 'gif_delay',
- gif_positions => \&_fix_gif_positions,
- gif_loop_count => 'gif_loop',
- );
-
- sub _set_opts {
- my ($self, $opts, $prefix, @imgs) = @_;
-
- for my $opt (keys %$opts) {
- my $tagname = $opt;
- if ($obsolete_opts{$opt}) {
- my $new = $obsolete_opts{$opt};
- my $msg = "Obsolete option $opt ";
- if (ref $new) {
- $new->($opts, $opt, \$msg, @imgs);
- }
- else {
- $msg .= "replaced with the $new tag ";
- $tagname = $new;
- }
- $msg .= "line ".(caller(2))[2]." of file ".(caller(2))[1];
- warn $msg if $warn_obsolete && $^W;
- }
- next unless $tagname =~ /^\Q$prefix/;
- my $value = $opts->{$opt};
- if (ref $value) {
- if (UNIVERSAL::isa($value, "Imager::Color")) {
- my $tag = sprintf("color(%d,%d,%d,%d)", $value->rgba);
- for my $img (@imgs) {
- $img->settag(name=>$tagname, value=>$tag);
- }
- }
- elsif (ref($value) eq 'ARRAY') {
- for my $i (0..$#$value) {
- my $val = $value->[$i];
- if (ref $val) {
- if (UNIVERSAL::isa($val, "Imager::Color")) {
- my $tag = sprintf("color(%d,%d,%d,%d)", $value->rgba);
- $i < @imgs and
- $imgs[$i]->settag(name=>$tagname, value=>$tag);
- }
- else {
- $self->_set_error("Unknown reference type " . ref($value) .
- " supplied in array for $opt");
- return;
- }
- }
- else {
- $i < @imgs
- and $imgs[$i]->settag(name=>$tagname, value=>$val);
- }
- }
- }
- else {
- $self->_set_error("Unknown reference type " . ref($value) .
- " supplied for $opt");
- return;
- }
- }
- else {
- # set it as a tag for every image
- for my $img (@imgs) {
- $img->settag(name=>$tagname, value=>$value);
- }
- }
- }
-
- return 1;
- }
-
- # Write an image to file
- sub write {
- my $self = shift;
- my %input=(jpegquality=>75,
- gifquant=>'mc',
- lmdither=>6.0,
- lmfixed=>[],
- idstring=>"",
- compress=>1,
- wierdpack=>0,
- fax_fine=>1, @_);
- my $rc;
-
- $self->_set_opts(\%input, "i_", $self)
- or return undef;
-
- unless ($self->{IMG}) { $self->{ERRSTR}='empty input image'; return undef; }
-
- if (!$input{'type'} and $input{file}) {
- $input{'type'}=$FORMATGUESS->($input{file});
- }
- if (!$input{'type'}) {
- $self->{ERRSTR}='type parameter missing and not possible to guess from extension';
- return undef;
- }
-
- _writer_autoload($input{type});
-
- my ($IO, $fh);
- if ($writers{$input{type}} && $writers{$input{type}}{single}) {
- ($IO, $fh) = $self->_get_writer_io(\%input, $input{'type'})
- or return undef;
-
- $writers{$input{type}}{single}->($self, $IO, %input)
- or return undef;
- }
- else {
- if (!$formats{$input{'type'}}) {
- $self->{ERRSTR}='format not supported';
- return undef;
- }
-
- ($IO, $fh) = $self->_get_writer_io(\%input, $input{'type'})
- or return undef;
-
- if ($input{'type'} eq 'tiff') {
- $self->_set_opts(\%input, "tiff_", $self)
- or return undef;
- $self->_set_opts(\%input, "exif_", $self)
- or return undef;
-
- if (defined $input{class} && $input{class} eq 'fax') {
- if (!i_writetiff_wiol_faxable($self->{IMG}, $IO, $input{fax_fine})) {
- $self->{ERRSTR} = $self->_error_as_msg();
- return undef;
- }
- } else {
- if (!i_writetiff_wiol($self->{IMG}, $IO)) {
- $self->{ERRSTR} = $self->_error_as_msg();
- return undef;
- }
- }
- } elsif ( $input{'type'} eq 'pnm' ) {
- $self->_set_opts(\%input, "pnm_", $self)
- or return undef;
- if ( ! i_writeppm_wiol($self->{IMG},$IO) ) {
- $self->{ERRSTR} = $self->_error_as_msg();
- return undef;
- }
- $self->{DEBUG} && print "writing a pnm file\n";
- } elsif ( $input{'type'} eq 'raw' ) {
- $self->_set_opts(\%input, "raw_", $self)
- or return undef;
- if ( !i_writeraw_wiol($self->{IMG},$IO) ) {
- $self->{ERRSTR} = $self->_error_as_msg();
- return undef;
- }
- $self->{DEBUG} && print "writing a raw file\n";
- } elsif ( $input{'type'} eq 'png' ) {
- $self->_set_opts(\%input, "png_", $self)
- or return undef;
- if ( !i_writepng_wiol($self->{IMG}, $IO) ) {
- $self->{ERRSTR}='unable to write png image';
- return undef;
- }
- $self->{DEBUG} && print "writing a png file\n";
- } elsif ( $input{'type'} eq 'jpeg' ) {
- $self->_set_opts(\%input, "jpeg_", $self)
- or return undef;
- $self->_set_opts(\%input, "exif_", $self)
- or return undef;
- if ( !i_writejpeg_wiol($self->{IMG}, $IO, $input{jpegquality})) {
- $self->{ERRSTR} = $self->_error_as_msg();
- return undef;
- }
- $self->{DEBUG} && print "writing a jpeg file\n";
- } elsif ( $input{'type'} eq 'bmp' ) {
- $self->_set_opts(\%input, "bmp_", $self)
- or return undef;
- if ( !i_writebmp_wiol($self->{IMG}, $IO) ) {
- $self->{ERRSTR} = $self->_error_as_msg;
- return undef;
- }
- $self->{DEBUG} && print "writing a bmp file\n";
- } elsif ( $input{'type'} eq 'tga' ) {
- $self->_set_opts(\%input, "tga_", $self)
- or return undef;
-
- if ( !i_writetga_wiol($self->{IMG}, $IO, $input{wierdpack}, $input{compress}, $input{idstring}) ) {
- $self->{ERRSTR}=$self->_error_as_msg();
- return undef;
- }
- $self->{DEBUG} && print "writing a tga file\n";
- } elsif ( $input{'type'} eq 'gif' ) {
- $self->_set_opts(\%input, "gif_", $self)
- or return undef;
- # compatibility with the old interfaces
- if ($input{gifquant} eq 'lm') {
- $input{make_colors} = 'addi';
- $input{translate} = 'perturb';
- $input{perturb} = $input{lmdither};
- } elsif ($input{gifquant} eq 'gen') {
- # just pass options through
- } else {
- $input{make_colors} = 'webmap'; # ignored
- $input{translate} = 'giflib';
- }
- if (!i_writegif_wiol($IO, \%input, $self->{IMG})) {
- $self->{ERRSTR} = $self->_error_as_msg;
- return;
- }
- }
- }
-
- if (exists $input{'data'}) {
- my $data = io_slurp($IO);
- if (!$data) {
- $self->{ERRSTR}='Could not slurp from buffer';
- return undef;
- }
- ${$input{data}} = $data;
- }
- return $self;
- }
-
- sub write_multi {
- my ($class, $opts, @images) = @_;
-
- my $type = $opts->{type};
-
- if (!$type && $opts->{'file'}) {
- $type = $FORMATGUESS->($opts->{'file'});
- }
- unless ($type) {
- $class->_set_error('type parameter missing and not possible to guess from extension');
- return;
- }
- # translate to ImgRaw
- if (grep !UNIVERSAL::isa($_, 'Imager') || !$_->{IMG}, @images) {
- $class->_set_error('Usage: Imager->write_multi({ options }, @images)');
- return 0;
- }
- $class->_set_opts($opts, "i_", @images)
- or return;
- my @work = map $_->{IMG}, @images;
-
- _writer_autoload($type);
-
- my ($IO, $file);
- if ($writers{$type} && $writers{$type}{multiple}) {
- ($IO, $file) = $class->_get_writer_io($opts, $type)
- or return undef;
-
- $writers{$type}{multiple}->($class, $IO, $opts, @images)
- or return undef;
- }
- else {
- if (!$formats{$type}) {
- $class->_set_error("format $type not supported");
- return undef;
- }
-
- ($IO, $file) = $class->_get_writer_io($opts, $type)
- or return undef;
-
- if ($type eq 'gif') {
- $class->_set_opts($opts, "gif_", @images)
- or return;
- my $gif_delays = $opts->{gif_delays};
- local $opts->{gif_delays} = $gif_delays;
- if ($opts->{gif_delays} && !ref $opts->{gif_delays}) {
- # assume the caller wants the same delay for each frame
- $opts->{gif_delays} = [ ($gif_delays) x @images ];
- }
- unless (i_writegif_wiol($IO, $opts, @work)) {
- $class->_set_error($class->_error_as_msg());
- return undef;
- }
- }
- elsif ($type eq 'tiff') {
- $class->_set_opts($opts, "tiff_", @images)
- or return;
- $class->_set_opts($opts, "exif_", @images)
- or return;
- my $res;
- $opts->{fax_fine} = 1 unless exists $opts->{fax_fine};
- if ($opts->{'class'} && $opts->{'class'} eq 'fax') {
- $res = i_writetiff_multi_wiol_faxable($IO, $opts->{fax_fine}, @work);
- }
- else {
- $res = i_writetiff_multi_wiol($IO, @work);
- }
- unless ($res) {
- $class->_set_error($class->_error_as_msg());
- return undef;
- }
- }
- else {
- if (@images == 1) {
- unless ($images[0]->write(%$opts, io => $IO, type => $type)) {
- return 1;
- }
- }
- else {
- $ERRSTR = "Sorry, write_multi doesn't support $type yet";
- return 0;
- }
- }
- }
-
- if (exists $opts->{'data'}) {
- my $data = io_slurp($IO);
- if (!$data) {
- Imager->_set_error('Could not slurp from buffer');
- return undef;
- }
- ${$opts->{data}} = $data;
- }
- return 1;
- }
-
- # read multiple images from a file
- sub read_multi {
- my ($class, %opts) = @_;
-
- my ($IO, $file) = $class->_get_reader_io(\%opts, $opts{'type'})
- or return;
-
- my $type = $opts{'type'};
- unless ($type) {
- $type = i_test_format_probe($IO, -1);
- }
-
- if ($opts{file} && !$type) {
- # guess the type
- $type = $FORMATGUESS->($opts{file});
- }
-
- unless ($type) {
- $ERRSTR = "No type parameter supplied and it couldn't be guessed";
- return;
- }
-
- _reader_autoload($type);
-
- if ($readers{$type} && $readers{$type}{multiple}) {
- return $readers{$type}{multiple}->($IO, %opts);
- }
-
- if ($type eq 'gif') {
- my @imgs;
- @imgs = i_readgif_multi_wiol($IO);
- if (@imgs) {
- return map {
- bless { IMG=>$_, DEBUG=>$DEBUG, ERRSTR=>undef }, 'Imager'
- } @imgs;
- }
- else {
- $ERRSTR = _error_as_msg();
- return;
- }
- }
- elsif ($type eq 'tiff') {
- my @imgs = i_readtiff_multi_wiol($IO, -1);
- if (@imgs) {
- return map {
- bless { IMG=>$_, DEBUG=>$DEBUG, ERRSTR=>undef }, 'Imager'
- } @imgs;
- }
- else {
- $ERRSTR = _error_as_msg();
- return;
- }
- }
- else {
- my $img = Imager->new;
- if ($img->read(%opts, io => $IO, type => $type)) {
- return ( $img );
- }
- }
-
- $ERRSTR = "Cannot read multiple images from $type files";
- return;
- }
-
- # Destroy an Imager object
-
- sub DESTROY {
- my $self=shift;
- # delete $instances{$self};
- if (defined($self->{IMG})) {
- # the following is now handled by the XS DESTROY method for
- # Imager::ImgRaw object
- # Re-enabling this will break virtual images
- # tested for in t/t020masked.t
- # i_img_destroy($self->{IMG});
- undef($self->{IMG});
- } else {
- # print "Destroy Called on an empty image!\n"; # why did I put this here??
- }
- }
-
- # Perform an inplace filter of an image
- # that is the image will be overwritten with the data
-
- sub filter {
- my $self=shift;
- my %input=@_;
- my %hsh;
- unless ($self->{IMG}) { $self->{ERRSTR}='empty input image'; return undef; }
-
- if (!$input{'type'}) { $self->{ERRSTR}='type parameter missing'; return undef; }
-
- if ( (grep { $_ eq $input{'type'} } keys %filters) != 1) {
- $self->{ERRSTR}='type parameter not matching any filter'; return undef;
- }
-
- if ($filters{$input{'type'}}{names}) {
- my $names = $filters{$input{'type'}}{names};
- for my $name (keys %$names) {
- if (defined $input{$name} && exists $names->{$name}{$input{$name}}) {
- $input{$name} = $names->{$name}{$input{$name}};
- }
- }
- }
- if (defined($filters{$input{'type'}}{defaults})) {
- %hsh=( image => $self->{IMG},
- imager => $self,
- %{$filters{$input{'type'}}{defaults}},
- %input );
- } else {
- %hsh=( image => $self->{IMG},
- imager => $self,
- %input );
- }
-
- my @cs=@{$filters{$input{'type'}}{callseq}};
-
- for(@cs) {
- if (!defined($hsh{$_})) {
- $self->{ERRSTR}="missing parameter '$_' for filter ".$input{'type'}; return undef;
- }
- }
-
- eval {
- local $SIG{__DIE__}; # we don't want this processed by confess, etc
- &{$filters{$input{'type'}}{callsub}}(%hsh);
- };
- if ($@) {
- chomp($self->{ERRSTR} = $@);
- return;
- }
-
- my @b=keys %hsh;
-
- $self->{DEBUG} && print "callseq is: @cs\n";
- $self->{DEBUG} && print "matching callseq is: @b\n";
-
- return $self;
- }
-
- sub register_filter {
- my $class = shift;
- my %hsh = ( defaults => {}, @_ );
-
- defined $hsh{type}
- or die "register_filter() with no type\n";
- defined $hsh{callsub}
- or die "register_filter() with no callsub\n";
- defined $hsh{callseq}
- or die "register_filter() with no callseq\n";
-
- exists $filters{$hsh{type}}
- and return;
-
- $filters{$hsh{type}} = \%hsh;
-
- return 1;
- }
-
- # Scale an image to requested size and return the scaled version
-
- sub scale {
- my $self=shift;
- my %opts=('type'=>'max',qtype=>'normal',@_);
- my $img = Imager->new();
- my $tmp = Imager->new();
- my ($x_scale, $y_scale);
-
- unless (defined wantarray) {
- my @caller = caller;
- warn "scale() called in void context - scale() returns the scaled image at $caller[1] line $caller[2]\n";
- return;
- }
-
- unless ($self->{IMG}) {
- $self->_set_error('empty input image');
- return undef;
- }
-
- if ($opts{'xscalefactor'} && $opts{'yscalefactor'}) {
- $x_scale = $opts{'xscalefactor'};
- $y_scale = $opts{'yscalefactor'};
- }
- elsif ($opts{'xscalefactor'}) {
- $x_scale = $opts{'xscalefactor'};
- $y_scale = $opts{'scalefactor'} || $x_scale;
- }
- elsif ($opts{'yscalefactor'}) {
- $y_scale = $opts{'yscalefactor'};
- $x_scale = $opts{'scalefactor'} || $y_scale;
- }
- else {
- $x_scale = $y_scale = $opts{'scalefactor'} || 0.5;
- }
-
- # work out the scaling
- if ($opts{xpixels} and $opts{ypixels} and $opts{'type'}) {
- my ($xpix, $ypix)=( $opts{xpixels} / $self->getwidth() ,
- $opts{ypixels} / $self->getheight() );
- if ($opts{'type'} eq 'min') {
- $x_scale = $y_scale = _min($xpix,$ypix);
- }
- elsif ($opts{'type'} eq 'max') {
- $x_scale = $y_scale = _max($xpix,$ypix);
- }
- elsif ($opts{'type'} eq 'nonprop' || $opts{'type'} eq 'non-proportional') {
- $x_scale = $xpix;
- $y_scale = $ypix;
- }
- else {
- $self->_set_error('invalid value for type parameter');
- return undef;
- }
- } elsif ($opts{xpixels}) {
- $x_scale = $y_scale = $opts{xpixels} / $self->getwidth();
- }
- elsif ($opts{ypixels}) {
- $x_scale = $y_scale = $opts{ypixels}/$self->getheight();
- }
- elsif ($opts{constrain} && ref $opts{constrain}
- && $opts{constrain}->can('constrain')) {
- # we've been passed an Image::Math::Constrain object or something
- # that looks like one
- my $scalefactor;
- (undef, undef, $scalefactor)
- = $opts{constrain}->constrain($self->getwidth, $self->getheight);
- unless ($scalefactor) {
- $self->_set_error('constrain method failed on constrain parameter');
- return undef;
- }
- $x_scale = $y_scale = $scalefactor;
- }
-
- if ($opts{qtype} eq 'normal') {
- $tmp->{IMG} = i_scaleaxis($self->{IMG}, $x_scale, 0);
- if ( !defined($tmp->{IMG}) ) {
- $self->{ERRSTR} = 'unable to scale image';
- return undef;
- }
- $img->{IMG}=i_scaleaxis($tmp->{IMG}, $y_scale, 1);
- if ( !defined($img->{IMG}) ) {
- $self->{ERRSTR}='unable to scale image';
- return undef;
- }
-
- return $img;
- }
- elsif ($opts{'qtype'} eq 'preview') {
- $img->{IMG} = i_scale_nn($self->{IMG}, $x_scale, $y_scale);
- if ( !defined($img->{IMG}) ) {
- $self->{ERRSTR}='unable to scale image';
- return undef;
- }
- return $img;
- }
- elsif ($opts{'qtype'} eq 'mixing') {
- my $new_width = int(0.5 + $self->getwidth * $x_scale);
- my $new_height = int(0.5 + $self->getheight * $y_scale);
- $new_width >= 1 or $new_width = 1;
- $new_height >= 1 or $new_height = 1;
- $img->{IMG} = i_scale_mixing($self->{IMG}, $new_width, $new_height);
- unless ($img->{IMG}) {
- $self->_set_error(Imager->_error_as_meg);
- return;
- }
- return $img;
- }
- else {
- $self->_set_error('invalid value for qtype parameter');
- return undef;
- }
- }
-
- # Scales only along the X axis
-
- sub scaleX {
- my $self = shift;
- my %opts = ( scalefactor=>0.5, @_ );
-
- unless (defined wantarray) {
- my @caller = caller;
- warn "scaleX() called in void context - scaleX() returns the scaled image at $caller[1] line $caller[2]\n";
- return;
- }
-
- unless ($self->{IMG}) {
- $self->{ERRSTR} = 'empty input image';
- return undef;
- }
-
- my $img = Imager->new();
-
- my $scalefactor = $opts{scalefactor};
-
- if ($opts{pixels}) {
- $scalefactor = $opts{pixels} / $self->getwidth();
- }
-
- unless ($self->{IMG}) {
- $self->{ERRSTR}='empty input image';
- return undef;
- }
-
- $img->{IMG} = i_scaleaxis($self->{IMG}, $scalefactor, 0);
-
- if ( !defined($img->{IMG}) ) {
- $self->{ERRSTR} = 'unable to scale image';
- return undef;
- }
-
- return $img;
- }
-
- # Scales only along the Y axis
-
- sub scaleY {
- my $self = shift;
- my %opts = ( scalefactor => 0.5, @_ );
-
- unless (defined wantarray) {
- my @caller = caller;
- warn "scaleY() called in void context - scaleY() returns the scaled image at $caller[1] line $caller[2]\n";
- return;
- }
-
- unless ($self->{IMG}) { $self->{ERRSTR}='empty input image'; return undef; }
-
- my $img = Imager->new();
-
- my $scalefactor = $opts{scalefactor};
-
- if ($opts{pixels}) {
- $scalefactor = $opts{pixels} / $self->getheight();
- }
-
- unless ($self->{IMG}) {
- $self->{ERRSTR} = 'empty input image';
- return undef;
- }
- $img->{IMG}=i_scaleaxis($self->{IMG}, $scalefactor, 1);
-
- if ( !defined($img->{IMG}) ) {
- $self->{ERRSTR} = 'unable to scale image';
- return undef;
- }
-
- return $img;
- }
-
- # Transform returns a spatial transformation of the input image
- # this moves pixels to a new location in the returned image.
- # NOTE - should make a utility function to check transforms for
- # stack overruns
-
- sub transform {
- my $self=shift;
- unless ($self->{IMG}) { $self->{ERRSTR}='empty input image'; return undef; }
- my %opts=@_;
- my (@op,@ropx,@ropy,$iop,$or,@parm,$expr,@xt,@yt,@pt,$numre);
-
- # print Dumper(\%opts);
- # xopcopdes
-
- if ( $opts{'xexpr'} and $opts{'yexpr'} ) {
- if (!$I2P) {
- eval ("use Affix::Infix2Postfix;");
- print $@;
- if ( $@ ) {
- $self->{ERRSTR}='transform: expr given and Affix::Infix2Postfix is not avaliable.';
- return undef;
- }
- $I2P=Affix::Infix2Postfix->new('ops'=>[{op=>'+',trans=>'Add'},
- {op=>'-',trans=>'Sub'},
- {op=>'*',trans=>'Mult'},
- {op=>'/',trans=>'Div'},
- {op=>'-','type'=>'unary',trans=>'u-'},
- {op=>'**'},
- {op=>'func','type'=>'unary'}],
- 'grouping'=>[qw( \( \) )],
- 'func'=>[qw( sin cos )],
- 'vars'=>[qw( x y )]
- );
- }
-
- @xt=$I2P->translate($opts{'xexpr'});
- @yt=$I2P->translate($opts{'yexpr'});
-
- $numre=$I2P->{'numre'};
- @pt=(0,0);
-
- for(@xt) { if (/$numre/) { push(@pt,$_); push(@{$opts{'xopcodes'}},'Parm',$#pt); } else { push(@{$opts{'xopcodes'}},$_); } }
- for(@yt) { if (/$numre/) { push(@pt,$_); push(@{$opts{'yopcodes'}},'Parm',$#pt); } else { push(@{$opts{'yopcodes'}},$_); } }
- @{$opts{'parm'}}=@pt;
- }
-
- # print Dumper(\%opts);
-
- if ( !exists $opts{'xopcodes'} or @{$opts{'xopcodes'}}==0) {
- $self->{ERRSTR}='transform: no xopcodes given.';
- return undef;
- }
-
- @op=@{$opts{'xopcodes'}};
- for $iop (@op) {
- if (!defined ($OPCODES{$iop}) and ($iop !~ /^\d+$/) ) {
- $self->{ERRSTR}="transform: illegal opcode '$_'.";
- return undef;
- }
- push(@ropx,(exists $OPCODES{$iop}) ? @{$OPCODES{$iop}} : $iop );
- }
-
-
- # yopcopdes
-
- if ( !exists $opts{'yopcodes'} or @{$opts{'yopcodes'}}==0) {
- $self->{ERRSTR}='transform: no yopcodes given.';
- return undef;
- }
-
- @op=@{$opts{'yopcodes'}};
- for $iop (@op) {
- if (!defined ($OPCODES{$iop}) and ($iop !~ /^\d+$/) ) {
- $self->{ERRSTR}="transform: illegal opcode '$_'.";
- return undef;
- }
- push(@ropy,(exists $OPCODES{$iop}) ? @{$OPCODES{$iop}} : $iop );
- }
-
- #parameters
-
- if ( !exists $opts{'parm'}) {
- $self->{ERRSTR}='transform: no parameter arg given.';
- return undef;
- }
-
- # print Dumper(\@ropx);
- # print Dumper(\@ropy);
- # print Dumper(\@ropy);
-
- my $img = Imager->new();
- $img->{IMG}=i_transform($self->{IMG},\@ropx,\@ropy,$opts{'parm'});
- if ( !defined($img->{IMG}) ) { $self->{ERRSTR}='transform: failed'; return undef; }
- return $img;
- }
-
-
- sub transform2 {
- my ($opts, @imgs) = @_;
-
- require "Imager/Expr.pm";
-
- $opts->{variables} = [ qw(x y) ];
- my ($width, $height) = @{$opts}{qw(width height)};
- if (@imgs) {
- $width ||= $imgs[0]->getwidth();
- $height ||= $imgs[0]->getheight();
- my $img_num = 1;
- for my $img (@imgs) {
- $opts->{constants}{"w$img_num"} = $img->getwidth();
- $opts->{constants}{"h$img_num"} = $img->getheight();
- $opts->{constants}{"cx$img_num"} = $img->getwidth()/2;
- $opts->{constants}{"cy$img_num"} = $img->getheight()/2;
- ++$img_num;
- }
- }
- if ($width) {
- $opts->{constants}{w} = $width;
- $opts->{constants}{cx} = $width/2;
- }
- else {
- $Imager::ERRSTR = "No width supplied";
- return;
- }
- if ($height) {
- $opts->{constants}{h} = $height;
- $opts->{constants}{cy} = $height/2;
- }
- else {
- $Imager::ERRSTR = "No height supplied";
- return;
- }
- my $code = Imager::Expr->new($opts);
- if (!$code) {
- $Imager::ERRSTR = Imager::Expr::error();
- return;
- }
- my $channels = $opts->{channels} || 3;
- unless ($channels >= 1 && $channels <= 4) {
- return Imager->_set_error("channels must be an integer between 1 and 4");
- }
-
- my $img = Imager->new();
- $img->{IMG} = i_transform2($opts->{width}, $opts->{height},
- $channels, $code->code(),
- $code->nregs(), $code->cregs(),
- [ map { $_->{IMG} } @imgs ]);
- if (!defined $img->{IMG}) {
- $Imager::ERRSTR = Imager->_error_as_msg();
- return;
- }
-
- return $img;
- }
-
- sub rubthrough {
- my $self=shift;
- my %opts=(tx => 0,ty => 0, @_);
-
- unless ($self->{IMG}) {
- $self->{ERRSTR}='empty input image';
- return undef;
- }
- unless ($opts{src} && $opts{src}->{IMG}) {
- $self->{ERRSTR}='empty input image for src';
- return undef;
- }
-
- %opts = (src_minx => 0,
- src_miny => 0,
- src_maxx => $opts{src}->getwidth(),
- src_maxy => $opts{src}->getheight(),
- %opts);
-
- unless (i_rubthru($self->{IMG}, $opts{src}->{IMG}, $opts{tx}, $opts{ty},
- $opts{src_minx}, $opts{src_miny},
- $opts{src_maxx}, $opts{src_maxy})) {
- $self->_set_error($self->_error_as_msg());
- return undef;
- }
- return $self;
- }
-
-
- sub flip {
- my $self = shift;
- my %opts = @_;
- my %xlate = (h=>0, v=>1, hv=>2, vh=>2);
- my $dir;
- return () unless defined $opts{'dir'} and defined $xlate{$opts{'dir'}};
- $dir = $xlate{$opts{'dir'}};
- return $self if i_flipxy($self->{IMG}, $dir);
- return ();
- }
-
- sub rotate {
- my $self = shift;
- my %opts = @_;
-
- unless (defined wantarray) {
- my @caller = caller;
- warn "rotate() called in void context - rotate() returns the rotated image at $caller[1] line $caller[2]\n";
- return;
- }
-
- if (defined $opts{right}) {
- my $degrees = $opts{right};
- if ($degrees < 0) {
- $degrees += 360 * int(((-$degrees)+360)/360);
- }
- $degrees = $degrees % 360;
- if ($degrees == 0) {
- return $self->copy();
- }
- elsif ($degrees == 90 || $degrees == 180 || $degrees == 270) {
- my $result = Imager->new();
- if ($result->{IMG} = i_rotate90($self->{IMG}, $degrees)) {
- return $result;
- }
- else {
- $self->{ERRSTR} = $self->_error_as_msg();
- return undef;
- }
- }
- else {
- $self->{ERRSTR} = "Parameter 'right' must be a multiple of 90 degrees";
- return undef;
- }
- }
- elsif (defined $opts{radians} || defined $opts{degrees}) {
- my $amount = $opts{radians} || $opts{degrees} * 3.1415926535 / 180;
-
- my $back = $opts{back};
- my $result = Imager->new;
- if ($back) {
- $back = _color($back);
- unless ($back) {
- $self->_set_error(Imager->errstr);
- return undef;
- }
-
- $result->{IMG} = i_rotate_exact($self->{IMG}, $amount, $back);
- }
- else {
- $result->{IMG} = i_rotate_exact($self->{IMG}, $amount);
- }
- if ($result->{IMG}) {
- return $result;
- }
- else {
- $self->{ERRSTR} = $self->_error_as_msg();
- return undef;
- }
- }
- else {
- $self->{ERRSTR} = "Only the 'right', 'radians' and 'degrees' parameters are available";
- return undef;
- }
- }
-
- sub matrix_transform {
- my $self = shift;
- my %opts = @_;
-
- unless (defined wantarray) {
- my @caller = caller;
- warn "copy() called in void context - copy() returns the copied image at $caller[1] line $caller[2]\n";
- return;
- }
-
- if ($opts{matrix}) {
- my $xsize = $opts{xsize} || $self->getwidth;
- my $ysize = $opts{ysize} || $self->getheight;
-
- my $result = Imager->new;
- if ($opts{back}) {
- $result->{IMG} = i_matrix_transform($self->{IMG}, $xsize, $ysize,
- $opts{matrix}, $opts{back})
- or return undef;
- }
- else {
- $result->{IMG} = i_matrix_transform($self->{IMG}, $xsize, $ysize,
- $opts{matrix})
- or return undef;
- }
-
- return $result;
- }
- else {
- $self->{ERRSTR} = "matrix parameter required";
- return undef;
- }
- }
-
- # blame Leolo :)
- *yatf = \&matrix_transform;
-
- # These two are supported for legacy code only
-
- sub i_color_new {
- return Imager::Color->new(@_);
- }
-
- sub i_color_set {
- return Imager::Color::set(@_);
- }
-
- # Draws a box between the specified corner points.
- sub box {
- my $self=shift;
- unless ($self->{IMG}) { $self->{ERRSTR}='empty input image'; return undef; }
- my $dflcl=i_color_new(255,255,255,255);
- my %opts=(color=>$dflcl,xmin=>0,ymin=>0,xmax=>$self->getwidth()-1,ymax=>$self->getheight()-1,@_);
-
- if (exists $opts{'box'}) {
- $opts{'xmin'} = _min($opts{'box'}->[0],$opts{'box'}->[2]);
- $opts{'xmax'} = _max($opts{'box'}->[0],$opts{'box'}->[2]);
- $opts{'ymin'} = _min($opts{'box'}->[1],$opts{'box'}->[3]);
- $opts{'ymax'} = _max($opts{'box'}->[1],$opts{'box'}->[3]);
- }
-
- if ($opts{filled}) {
- my $color = _color($opts{'color'});
- unless ($color) {
- $self->{ERRSTR} = $Imager::ERRSTR;
- return;
- }
- i_box_filled($self->{IMG},$opts{xmin},$opts{ymin},$opts{xmax},
- $opts{ymax}, $color);
- }
- elsif ($opts{fill}) {
- unless (UNIVERSAL::isa($opts{fill}, 'Imager::Fill')) {
- # assume it's a hash ref
- require 'Imager/Fill.pm';
- unless ($opts{fill} = Imager::Fill->new(%{$opts{fill}})) {
- $self->{ERRSTR} = $Imager::ERRSTR;
- return undef;
- }
- }
- i_box_cfill($self->{IMG},$opts{xmin},$opts{ymin},$opts{xmax},
- $opts{ymax},$opts{fill}{fill});
- }
- else {
- my $color = _color($opts{'color'});
- unless ($color) {
- $self->{ERRSTR} = $Imager::ERRSTR;
- return;
- }
- i_box($self->{IMG},$opts{xmin},$opts{ymin},$opts{xmax},$opts{ymax},
- $color);
- }
- return $self;
- }
-
- sub arc {
- my $self=shift;
- unless ($self->{IMG}) { $self->{ERRSTR}='empty input image'; return undef; }
- my $dflcl=i_color_new(255,255,255,255);
- my %opts=(color=>$dflcl,
- 'r'=>_min($self->getwidth(),$self->getheight())/3,
- 'x'=>$self->getwidth()/2,
- 'y'=>$self->getheight()/2,
- 'd1'=>0, 'd2'=>361, @_);
- if ($opts{aa}) {
- if ($opts{fill}) {
- unless (UNIVERSAL::isa($opts{fill}, 'Imager::Fill')) {
- # assume it's a hash ref
- require 'Imager/Fill.pm';
- unless ($opts{fill} = Imager::Fill->new(%{$opts{fill}})) {
- $self->{ERRSTR} = $Imager::ERRSTR;
- return;
- }
- }
- i_arc_aa_cfill($self->{IMG},$opts{'x'},$opts{'y'},$opts{'r'},$opts{'d1'},
- $opts{'d2'}, $opts{fill}{fill});
- }
- else {
- my $color = _color($opts{'color'});
- unless ($color) {
- $self->{ERRSTR} = $Imager::ERRSTR;
- return;
- }
- if ($opts{d1} == 0 && $opts{d2} == 361 && $opts{aa}) {
- i_circle_aa($self->{IMG}, $opts{'x'}, $opts{'y'}, $opts{'r'},
- $color);
- }
- else {
- i_arc_aa($self->{IMG},$opts{'x'},$opts{'y'},$opts{'r'},
- $opts{'d1'}, $opts{'d2'}, $color);
- }
- }
- }
- else {
- if ($opts{fill}) {
- unless (UNIVERSAL::isa($opts{fill}, 'Imager::Fill')) {
- # assume it's a hash ref
- require 'Imager/Fill.pm';
- unless ($opts{fill} = Imager::Fill->new(%{$opts{fill}})) {
- $self->{ERRSTR} = $Imager::ERRSTR;
- return;
- }
- }
- i_arc_cfill($self->{IMG},$opts{'x'},$opts{'y'},$opts{'r'},$opts{'d1'},
- $opts{'d2'}, $opts{fill}{fill});
- }
- else {
- my $color = _color($opts{'color'});
- unless ($color) {
- $self->{ERRSTR} = $Imager::ERRSTR;
- return;
- }
- i_arc($self->{IMG},$opts{'x'},$opts{'y'},$opts{'r'},
- $opts{'d1'}, $opts{'d2'}, $color);
- }
- }
-
- return $self;
- }
-
- # Draws a line from one point to the other
- # the endpoint is set if the endp parameter is set which it is by default.
- # to turn of the endpoint being set use endp=>0 when calling line.
-
- sub line {
- my $self=shift;
- my $dflcl=i_color_new(0,0,0,0);
- my %opts=(color=>$dflcl,
- endp => 1,
- @_);
- unless ($self->{IMG}) { $self->{ERRSTR}='empty input image'; return undef; }
-
- unless (exists $opts{x1} and exists $opts{y1}) { $self->{ERRSTR}='missing begining coord'; return undef; }
- unless (exists $opts{x2} and exists $opts{y2}) { $self->{ERRSTR}='missing ending coord'; return undef; }
-
- my $color = _color($opts{'color'});
- unless ($color) {
- $self->{ERRSTR} = $Imager::ERRSTR;
- return;
- }
-
- $opts{antialias} = $opts{aa} if defined $opts{aa};
- if ($opts{antialias}) {
- i_line_aa($self->{IMG},$opts{x1}, $opts{y1}, $opts{x2}, $opts{y2},
- $color, $opts{endp});
- } else {
- i_line($self->{IMG},$opts{x1}, $opts{y1}, $opts{x2}, $opts{y2},
- $color, $opts{endp});
- }
- return $self;
- }
-
- # Draws a line between an ordered set of points - It more or less just transforms this
- # into a list of lines.
-
- sub polyline {
- my $self=shift;
- my ($pt,$ls,@points);
- my $dflcl=i_color_new(0,0,0,0);
- my %opts=(color=>$dflcl,@_);
-
- unless ($self->{IMG}) { $self->{ERRSTR}='empty input image'; return undef; }
-
- if (exists($opts{points})) { @points=@{$opts{points}}; }
- if (!exists($opts{points}) and exists($opts{'x'}) and exists($opts{'y'}) ) {
- @points=map { [ $opts{'x'}->[$_],$opts{'y'}->[$_] ] } (0..(scalar @{$opts{'x'}}-1));
- }
-
- # print Dumper(\@points);
-
- my $color = _color($opts{'color'});
- unless ($color) {
- $self->{ERRSTR} = $Imager::ERRSTR;
- return;
- }
- $opts{antialias} = $opts{aa} if defined $opts{aa};
- if ($opts{antialias}) {
- for $pt(@points) {
- if (defined($ls)) {
- i_line_aa($self->{IMG},$ls->[0],$ls->[1],$pt->[0],$pt->[1],$color, 1);
- }
- $ls=$pt;
- }
- } else {
- for $pt(@points) {
- if (defined($ls)) {
- i_line($self->{IMG},$ls->[0],$ls->[1],$pt->[0],$pt->[1],$color,1);
- }
- $ls=$pt;
- }
- }
- return $self;
- }
-
- sub polygon {
- my $self = shift;
- my ($pt,$ls,@points);
- my $dflcl = i_color_new(0,0,0,0);
- my %opts = (color=>$dflcl, @_);
-
- unless ($self->{IMG}) { $self->{ERRSTR}='empty input image'; return undef; }
-
- if (exists($opts{points})) {
- $opts{'x'} = [ map { $_->[0] } @{$opts{points}} ];
- $opts{'y'} = [ map { $_->[1] } @{$opts{points}} ];
- }
-
- if (!exists $opts{'x'} or !exists $opts{'y'}) {
- $self->{ERRSTR} = 'no points array, or x and y arrays.'; return undef;
- }
-
- if ($opts{'fill'}) {
- unless (UNIVERSAL::isa($opts{'fill'}, 'Imager::Fill')) {
- # assume it's a hash ref
- require 'Imager/Fill.pm';
- unless ($opts{'fill'} = Imager::Fill->new(%{$opts{'fill'}})) {
- $self->{ERRSTR} = $Imager::ERRSTR;
- return undef;
- }
- }
- i_poly_aa_cfill($self->{IMG}, $opts{'x'}, $opts{'y'},
- $opts{'fill'}{'fill'});
- }
- else {
- my $color = _color($opts{'color'});
- unless ($color) {
- $self->{ERRSTR} = $Imager::ERRSTR;
- return;
- }
- i_poly_aa($self->{IMG}, $opts{'x'}, $opts{'y'}, $color);
- }
-
- return $self;
- }
-
-
- # this the multipoint bezier curve
- # this is here more for testing that actual usage since
- # this is not a good algorithm. Usually the curve would be
- # broken into smaller segments and each done individually.
-
- sub polybezier {
- my $self=shift;
- my ($pt,$ls,@points);
- my $dflcl=i_color_new(0,0,0,0);
- my %opts=(color=>$dflcl,@_);
-
- unless ($self->{IMG}) { $self->{ERRSTR}='empty input image'; return undef; }
-
- if (exists $opts{points}) {
- $opts{'x'}=map { $_->[0]; } @{$opts{'points'}};
- $opts{'y'}=map { $_->[1]; } @{$opts{'points'}};
- }
-
- unless ( @{$opts{'x'}} and @{$opts{'x'}} == @{$opts{'y'}} ) {
- $self->{ERRSTR}='Missing or invalid points.';
- return;
- }
-
- my $color = _color($opts{'color'});
- unless ($color) {
- $self->{ERRSTR} = $Imager::ERRSTR;
- return;
- }
- i_bezier_multi($self->{IMG},$opts{'x'},$opts{'y'},$color);
- return $self;
- }
-
- sub flood_fill {
- my $self = shift;
- my %opts = ( color=>Imager::Color->new(255, 255, 255), @_ );
- my $rc;
-
- unless (exists $opts{'x'} && exists $opts{'y'}) {
- $self->{ERRSTR} = "missing seed x and y parameters";
- return undef;
- }
-
- if ($opts{border}) {
- my $border = _color($opts{border});
- unless ($border) {
- $self->_set_error($Imager::ERRSTR);
- return;
- }
- if ($opts{fill}) {
- unless (UNIVERSAL::isa($opts{fill}, 'Imager::Fill')) {
- # assume it's a hash ref
- require Imager::Fill;
- unless ($opts{fill} = Imager::Fill->new(%{$opts{fill}})) {
- $self->{ERRSTR} = $Imager::ERRSTR;
- return;
- }
- }
- $rc = i_flood_cfill_border($self->{IMG}, $opts{'x'}, $opts{'y'},
- $opts{fill}{fill}, $border);
- }
- else {
- my $color = _color($opts{'color'});
- unless ($color) {
- $self->{ERRSTR} = $Imager::ERRSTR;
- return;
- }
- $rc = i_flood_fill_border($self->{IMG}, $opts{'x'}, $opts{'y'},
- $color, $border);
- }
- if ($rc) {
- return $self;
- }
- else {
- $self->{ERRSTR} = $self->_error_as_msg();
- return;
- }
- }
- else {
- if ($opts{fill}) {
- unless (UNIVERSAL::isa($opts{fill}, 'Imager::Fill')) {
- # assume it's a hash ref
- require 'Imager/Fill.pm';
- unless ($opts{fill} = Imager::Fill->new(%{$opts{fill}})) {
- $self->{ERRSTR} = $Imager::ERRSTR;
- return;
- }
- }
- $rc = i_flood_cfill($self->{IMG}, $opts{'x'}, $opts{'y'}, $opts{fill}{fill});
- }
- else {
- my $color = _color($opts{'color'});
- unless ($color) {
- $self->{ERRSTR} = $Imager::ERRSTR;
- return;
- }
- $rc = i_flood_fill($self->{IMG}, $opts{'x'}, $opts{'y'}, $color);
- }
- if ($rc) {
- return $self;
- }
- else {
- $self->{ERRSTR} = $self->_error_as_msg();
- return;
- }
- }
- }
-
- sub setpixel {
- my $self = shift;
-
- my %opts = ( color=>$self->{fg} || NC(255, 255, 255), @_);
-
- unless (exists $opts{'x'} && exists $opts{'y'}) {
- $self->{ERRSTR} = 'missing x and y parameters';
- return undef;
- }
-
- my $x = $opts{'x'};
- my $y = $opts{'y'};
- my $color = _color($opts{color})
- or return undef;
- if (ref $x && ref $y) {
- unless (@$x == @$y) {
- $self->{ERRSTR} = 'length of x and y mismatch';
- return;
- }
- my $set = 0;
- if ($color->isa('Imager::Color')) {
- for my $i (0..$#{$opts{'x'}}) {
- i_ppix($self->{IMG}, $x->[$i], $y->[$i], $color)
- or ++$set;
- }
- }
- else {
- for my $i (0..$#{$opts{'x'}}) {
- i_ppixf($self->{IMG}, $x->[$i], $y->[$i], $color)
- or ++$set;
- }
- }
- $set or return;
- return $set;
- }
- else {
- if ($color->isa('Imager::Color')) {
- i_ppix($self->{IMG}, $x, $y, $color)
- and return;
- }
- else {
- i_ppixf($self->{IMG}, $x, $y, $color)
- and return;
- }
- }
-
- $self;
- }
-
- sub getpixel {
- my $self = shift;
-
- my %opts = ( "type"=>'8bit', @_);
-
- unless (exists $opts{'x'} && exists $opts{'y'}) {
- $self->{ERRSTR} = 'missing x and y parameters';
- return undef;
- }
-
- my $x = $opts{'x'};
- my $y = $opts{'y'};
- if (ref $x && ref $y) {
- unless (@$x == @$y) {
- $self->{ERRSTR} = 'length of x and y mismatch';
- return undef;
- }
- my @result;
- if ($opts{"type"} eq '8bit') {
- for my $i (0..$#{$opts{'x'}}) {
- push(@result, i_get_pixel($self->{IMG}, $x->[$i], $y->[$i]));
- }
- }
- else {
- for my $i (0..$#{$opts{'x'}}) {
- push(@result, i_gpixf($self->{IMG}, $x->[$i], $y->[$i]));
- }
- }
- return wantarray ? @result : \@result;
- }
- else {
- if ($opts{"type"} eq '8bit') {
- return i_get_pixel($self->{IMG}, $x, $y);
- }
- else {
- return i_gpixf($self->{IMG}, $x, $y);
- }
- }
-
- $self;
- }
-
- sub getscanline {
- my $self = shift;
- my %opts = ( type => '8bit', x=>0, @_);
-
- $self->_valid_image or return;
-
- defined $opts{width} or $opts{width} = $self->getwidth - $opts{x};
-
- unless (defined $opts{'y'}) {
- $self->_set_error("missing y parameter");
- return;
- }
-
- if ($opts{type} eq '8bit') {
- return i_glin($self->{IMG}, $opts{x}, $opts{x}+$opts{width},
- $opts{'y'});
- }
- elsif ($opts{type} eq 'float') {
- return i_glinf($self->{IMG}, $opts{x}, $opts{x}+$opts{width},
- $opts{'y'});
- }
- elsif ($opts{type} eq 'index') {
- unless (i_img_type($self->{IMG})) {
- $self->_set_error("type => index only valid on paletted images");
- return;
- }
- return i_gpal($self->{IMG}, $opts{x}, $opts{x} + $opts{width},
- $opts{'y'});
- }
- else {
- $self->_set_error("invalid type parameter - must be '8bit' or 'float'");
- return;
- }
- }
-
- sub setscanline {
- my $self = shift;
- my %opts = ( x=>0, @_);
-
- $self->_valid_image or return;
-
- unless (defined $opts{'y'}) {
- $self->_set_error("missing y parameter");
- return;
- }
-
- if (!$opts{type}) {
- if (ref $opts{pixels} && @{$opts{pixels}}) {
- # try to guess the type
- if ($opts{pixels}[0]->isa('Imager::Color')) {
- $opts{type} = '8bit';
- }
- elsif ($opts{pixels}[0]->isa('Imager::Color::Float')) {
- $opts{type} = 'float';
- }
- else {
- $self->_set_error("missing type parameter and could not guess from pixels");
- return;
- }
- }
- else {
- # default
- $opts{type} = '8bit';
- }
- }
-
- if ($opts{type} eq '8bit') {
- if (ref $opts{pixels}) {
- return i_plin($self->{IMG}, $opts{x}, $opts{'y'}, @{$opts{pixels}});
- }
- else {
- return i_plin($self->{IMG}, $opts{x}, $opts{'y'}, $opts{pixels});
- }
- }
- elsif ($opts{type} eq 'float') {
- if (ref $opts{pixels}) {
- return i_plinf($self->{IMG}, $opts{x}, $opts{'y'}, @{$opts{pixels}});
- }
- else {
- return i_plinf($self->{IMG}, $opts{x}, $opts{'y'}, $opts{pixels});
- }
- }
- elsif ($opts{type} eq 'index') {
- if (ref $opts{pixels}) {
- return i_ppal($self->{IMG}, $opts{x}, $opts{'y'}, @{$opts{pixels}});
- }
- else {
- return i_ppal_p($self->{IMG}, $opts{x}, $opts{'y'}, $opts{pixels});
- }
- }
- else {
- $self->_set_error("invalid type parameter - must be '8bit' or 'float'");
- return;
- }
- }
-
- sub getsamples {
- my $self = shift;
- my %opts = ( type => '8bit', x=>0, @_);
-
- defined $opts{width} or $opts{width} = $self->getwidth - $opts{x};
-
- unless (defined $opts{'y'}) {
- $self->_set_error("missing y parameter");
- return;
- }
-
- unless ($opts{channels}) {
- $opts{channels} = [ 0 .. $self->getchannels()-1 ];
- }
-
- if ($opts{type} eq '8bit') {
- return i_gsamp($self->{IMG}, $opts{x}, $opts{x}+$opts{width},
- $opts{y}, @{$opts{channels}});
- }
- elsif ($opts{type} eq 'float') {
- return i_gsampf($self->{IMG}, $opts{x}, $opts{x}+$opts{width},
- $opts{y}, @{$opts{channels}});
- }
- else {
- $self->_set_error("invalid type parameter - must be '8bit' or 'float'");
- return;
- }
- }
-
- # make an identity matrix of the given size
- sub _identity {
- my ($size) = @_;
-
- my $matrix = [ map { [ (0) x $size ] } 1..$size ];
- for my $c (0 .. ($size-1)) {
- $matrix->[$c][$c] = 1;
- }
- return $matrix;
- }
-
- # general function to convert an image
- sub convert {
- my ($self, %opts) = @_;
- my $matrix;
-
- unless (defined wantarray) {
- my @caller = caller;
- warn "convert() called in void context - convert() returns the converted image at $caller[1] line $caller[2]\n";
- return;
- }
-
- # the user can either specify a matrix or preset
- # the matrix overrides the preset
- if (!exists($opts{matrix})) {
- unless (exists($opts{preset})) {
- $self->{ERRSTR} = "convert() needs a matrix or preset";
- return;
- }
- else {
- if ($opts{preset} eq 'gray' || $opts{preset} eq 'grey') {
- # convert to greyscale, keeping the alpha channel if any
- if ($self->getchannels == 3) {
- $matrix = [ [ 0.222, 0.707, 0.071 ] ];
- }
- elsif ($self->getchannels == 4) {
- # preserve the alpha channel
- $matrix = [ [ 0.222, 0.707, 0.071, 0 ],
- [ 0, 0, 0, 1 ] ];
- }
- else {
- # an identity
- $matrix = _identity($self->getchannels);
- }
- }
- elsif ($opts{preset} eq 'noalpha') {
- # strip the alpha channel
- if ($self->getchannels == 2 or $self->getchannels == 4) {
- $matrix = _identity($self->getchannels);
- pop(@$matrix); # lose the alpha entry
- }
- else {
- $matrix = _identity($self->getchannels);
- }
- }
- elsif ($opts{preset} eq 'red' || $opts{preset} eq 'channel0') {
- # extract channel 0
- $matrix = [ [ 1 ] ];
- }
- elsif ($opts{preset} eq 'green' || $opts{preset} eq 'channel1') {
- $matrix = [ [ 0, 1 ] ];
- }
- elsif ($opts{preset} eq 'blue' || $opts{preset} eq 'channel2') {
- $matrix = [ [ 0, 0, 1 ] ];
- }
- elsif ($opts{preset} eq 'alpha') {
- if ($self->getchannels == 2 or $self->getchannels == 4) {
- $matrix = [ [ (0) x ($self->getchannels-1), 1 ] ];
- }
- else {
- # the alpha is just 1 <shrug>
- $matrix = [ [ (0) x $self->getchannels, 1 ] ];
- }
- }
- elsif ($opts{preset} eq 'rgb') {
- if ($self->getchannels == 1) {
- $matrix = [ [ 1 ], [ 1 ], [ 1 ] ];
- }
- elsif ($self->getchannels == 2) {
- # preserve the alpha channel
- $matrix = [ [ 1, 0 ], [ 1, 0 ], [ 1, 0 ], [ 0, 1 ] ];
- }
- else {
- $matrix = _identity($self->getchannels);
- }
- }
- elsif ($opts{preset} eq 'addalpha') {
- if ($self->getchannels == 1) {
- $matrix = _identity(2);
- }
- elsif ($self->getchannels == 3) {
- $matrix = _identity(4);
- }
- else {
- $matrix = _identity($self->getchannels);
- }
- }
- else {
- $self->{ERRSTR} = "Unknown convert preset $opts{preset}";
- return undef;
- }
- }
- }
- else {
- $matrix = $opts{matrix};
- }
-
- my $new = Imager->new;
- $new->{IMG} = i_convert($self->{IMG}, $matrix);
- unless ($new->{IMG}) {
- # most likely a bad matrix
- $self->{ERRSTR} = _error_as_msg();
- return undef;
- }
- return $new;
- }
-
-
- # general function to map an image through lookup tables
-
- sub map {
- my ($self, %opts) = @_;
- my @chlist = qw( red green blue alpha );
-
- if (!exists($opts{'maps'})) {
- # make maps from channel maps
- my $chnum;
- for $chnum (0..$#chlist) {
- if (exists $opts{$chlist[$chnum]}) {
- $opts{'maps'}[$chnum] = $opts{$chlist[$chnum]};
- } elsif (exists $opts{'all'}) {
- $opts{'maps'}[$chnum] = $opts{'all'};
- }
- }
- }
- if ($opts{'maps'} and $self->{IMG}) {
- i_map($self->{IMG}, $opts{'maps'} );
- }
- return $self;
- }
-
- sub difference {
- my ($self, %opts) = @_;
-
- defined $opts{mindist} or $opts{mindist} = 0;
-
- defined $opts{other}
- or return $self->_set_error("No 'other' parameter supplied");
- defined $opts{other}{IMG}
- or return $self->_set_error("No image data in 'other' image");
-
- $self->{IMG}
- or return $self->_set_error("No image data");
-
- my $result = Imager->new;
- $result->{IMG} = i_diff_image($self->{IMG}, $opts{other}{IMG},
- $opts{mindist})
- or return $self->_set_error($self->_error_as_msg());
-
- return $result;
- }
-
- # destructive border - image is shrunk by one pixel all around
-
- sub border {
- my ($self,%opts)=@_;
- my($tx,$ty)=($self->getwidth()-1,$self->getheight()-1);
- $self->polyline('x'=>[0,$tx,$tx,0,0],'y'=>[0,0,$ty,$ty,0],%opts);
- }
-
-
- # Get the width of an image
-
- sub getwidth {
- my $self = shift;
- if (!defined($self->{IMG})) { $self->{ERRSTR} = 'image is empty'; return undef; }
- return (i_img_info($self->{IMG}))[0];
- }
-
- # Get the height of an image
-
- sub getheight {
- my $self = shift;
- if (!defined($self->{IMG})) { $self->{ERRSTR} = 'image is empty'; return undef; }
- return (i_img_info($self->{IMG}))[1];
- }
-
- # Get number of channels in an image
-
- sub getchannels {
- my $self = shift;
- if (!defined($self->{IMG})) { $self->{ERRSTR} = 'image is empty'; return undef; }
- return i_img_getchannels($self->{IMG});
- }
-
- # Get channel mask
-
- sub getmask {
- my $self = shift;
- if (!defined($self->{IMG})) { $self->{ERRSTR} = 'image is empty'; return undef; }
- return i_img_getmask($self->{IMG});
- }
-
- # Set channel mask
-
- sub setmask {
- my $self = shift;
- my %opts = @_;
- if (!defined($self->{IMG})) {
- $self->{ERRSTR} = 'image is empty';
- return undef;
- }
- unless (defined $opts{mask}) {
- $self->_set_error("mask parameter required");
- return;
- }
- i_img_setmask( $self->{IMG} , $opts{mask} );
-
- 1;
- }
-
- # Get number of colors in an image
-
- sub getcolorcount {
- my $self=shift;
- my %opts=('maxcolors'=>2**30,@_);
- if (!defined($self->{IMG})) { $self->{ERRSTR}='image is empty'; return undef; }
- my $rc=i_count_colors($self->{IMG},$opts{'maxcolors'});
- return ($rc==-1? undef : $rc);
- }
-
- # Returns a reference to a hash. The keys are colour named (packed) and the
- # values are the number of pixels in this colour.
- sub getcolorusagehash {
- my $self = shift;
-
- my %opts = ( maxcolors => 2**30, @_ );
- my $max_colors = $opts{maxcolors};
- unless (defined $max_colors && $max_colors > 0) {
- $self->_set_error('maxcolors must be a positive integer');
- return;
- }
-
- unless (defined $self->{IMG}) {
- $self->_set_error('empty input image');
- return;
- }
-
- my $channels= $self->getchannels;
- # We don't want to look at the alpha channel, because some gifs using it
- # doesn't define it for every colour (but only for some)
- $channels -= 1 if $channels == 2 or $channels == 4;
- my %color_use;
- my $height = $self->getheight;
- for my $y (0 .. $height - 1) {
- my $colors = $self->getsamples('y' => $y, channels => [ 0 .. $channels - 1 ]);
- while (length $colors) {
- $color_use{ substr($colors, 0, $channels, '') }++;
- }
- keys %color_use > $max_colors
- and return;
- }
- return \%color_use;
- }
-
- # This will return a ordered array of the colour usage. Kind of the sorted
- # version of the values of the hash returned by getcolorusagehash.
- # You might want to add safety checks and change the names, etc...
- sub getcolorusage {
- my $self = shift;
-
- my %opts = ( maxcolors => 2**30, @_ );
- my $max_colors = $opts{maxcolors};
- unless (defined $max_colors && $max_colors > 0) {
- $self->_set_error('maxcolors must be a positive integer');
- return;
- }
-
- unless (defined $self->{IMG}) {
- $self->_set_error('empty input image');
- return undef;
- }
-
- return i_get_anonymous_color_histo($self->{IMG}, $max_colors);
- }
-
- # draw string to an image
-
- sub string {
- my $self = shift;
- unless ($self->{IMG}) { $self->{ERRSTR}='empty input image'; return undef; }
-
- my %input=('x'=>0, 'y'=>0, @_);
- defined($input{string}) or $input{string} = $input{text};
-
- unless(defined $input{string}) {
- $self->{ERRSTR}="missing required parameter 'string'";
- return;
- }
-
- unless($input{font}) {
- $self->{ERRSTR}="missing required parameter 'font'";
- return;
- }
-
- unless ($input{font}->draw(image=>$self, %input)) {
- return;
- }
-
- return $self;
- }
-
- sub align_string {
- my $self = shift;
-
- my $img;
- if (ref $self) {
- unless ($self->{IMG}) {
- $self->{ERRSTR}='empty input image';
- return;
- }
- $img = $self;
- }
- else {
- $img = undef;
- }
-
- my %input=('x'=>0, 'y'=>0, @_);
- $input{string}||=$input{text};
-
- unless(exists $input{string}) {
- $self->_set_error("missing required parameter 'string'");
- return;
- }
-
- unless($input{font}) {
- $self->_set_error("missing required parameter 'font'");
- return;
- }
-
- my @result;
- unless (@result = $input{font}->align(image=>$img, %input)) {
- return;
- }
-
- return wantarray ? @result : $result[0];
- }
-
- my @file_limit_names = qw/width height bytes/;
-
- sub set_file_limits {
- shift;
-
- my %opts = @_;
- my %values;
-
- if ($opts{reset}) {
- @values{@file_limit_names} = (0) x @file_limit_names;
- }
- else {
- @values{@file_limit_names} = i_get_image_file_limits();
- }
-
- for my $key (keys %values) {
- defined $opts{$key} and $values{$key} = $opts{$key};
- }
-
- i_set_image_file_limits($values{width}, $values{height}, $values{bytes});
- }
-
- sub get_file_limits {
- i_get_image_file_limits();
- }
-
- # Shortcuts that can be exported
-
- sub newcolor { Imager::Color->new(@_); }
- sub newfont { Imager::Font->new(@_); }
-
- *NC=*newcolour=*newcolor;
- *NF=*newfont;
-
- *open=\&read;
- *circle=\&arc;
-
-
- #### Utility routines
-
- sub errstr {
- ref $_[0] ? $_[0]->{ERRSTR} : $ERRSTR
- }
-
- sub _set_error {
- my ($self, $msg) = @_;
-
- if (ref $self) {
- $self->{ERRSTR} = $msg;
- }
- else {
- $ERRSTR = $msg;
- }
- return;
- }
-
- # Default guess for the type of an image from extension
-
- sub def_guess_type {
- my $name=lc(shift);
- my $ext;
- $ext=($name =~ m/\.([^\.]+)$/)[0];
- return 'tiff' if ($ext =~ m/^tiff?$/);
- return 'jpeg' if ($ext =~ m/^jpe?g$/);
- return 'pnm' if ($ext =~ m/^p[pgb]m$/);
- return 'png' if ($ext eq "png");
- return 'bmp' if ($ext eq "bmp" || $ext eq "dib");
- return 'tga' if ($ext eq "tga");
- return 'sgi' if ($ext eq "rgb" || $ext eq "bw" || $ext eq "sgi" || $ext eq "rgba");
- return 'gif' if ($ext eq "gif");
- return 'raw' if ($ext eq "raw");
- return lc $ext; # best guess
- return ();
- }
-
- # get the minimum of a list
-
- sub _min {
- my $mx=shift;
- for(@_) { if ($_<$mx) { $mx=$_; }}
- return $mx;
- }
-
- # get the maximum of a list
-
- sub _max {
- my $mx=shift;
- for(@_) { if ($_>$mx) { $mx=$_; }}
- return $mx;
- }
-
- # string stuff for iptc headers
-
- sub _clean {
- my($str)=$_[0];
- $str = substr($str,3);
- $str =~ s/[\n\r]//g;
- $str =~ s/\s+/ /g;
- $str =~ s/^\s//;
- $str =~ s/\s$//;
- return $str;
- }
-
- # A little hack to parse iptc headers.
-
- sub parseiptc {
- my $self=shift;
- my(@sar,$item,@ar);
- my($caption,$photogr,$headln,$credit);
-
- my $str=$self->{IPTCRAW};
-
- defined $str
- or return;
-
- @ar=split(/8BIM/,$str);
-
- my $i=0;
- foreach (@ar) {
- if (/^\004\004/) {
- @sar=split(/\034\002/);
- foreach $item (@sar) {
- if ($item =~ m/^x/) {
- $caption = _clean($item);
- $i++;
- }
- if ($item =~ m/^P/) {
- $photogr = _clean($item);
- $i++;
- }
- if ($item =~ m/^i/) {
- $headln = _clean($item);
- $i++;
- }
- if ($item =~ m/^n/) {
- $credit = _clean($item);
- $i++;
- }
- }
- }
- }
- return (caption=>$caption,photogr=>$photogr,headln=>$headln,credit=>$credit);
- }
-
- sub Inline {
- my ($lang) = @_;
-
- $lang eq 'C'
- or die "Only C language supported";
-
- require Imager::ExtUtils;
- return Imager::ExtUtils->inline_config;
- }
-
- 1;
- __END__
- # Below is the stub of documentation for your module. You better edit it!
-
- =head1 NAME
-
- Imager - Perl extension for Generating 24 bit Images
-
- =head1 SYNOPSIS
-
- # Thumbnail example
-
- #!/usr/bin/perl -w
- use strict;
- use Imager;
-
- die "Usage: thumbmake.pl filename\n" if !-f $ARGV[0];
- my $file = shift;
-
- my $format;
-
- my $img = Imager->new();
- # see Imager::Files for information on the read() method
- $img->read(file=>$file) or die $img->errstr();
-
- $file =~ s/\.[^.]*$//;
-
- # Create smaller version
- # documented in Imager::Transformations
- my $thumb = $img->scale(scalefactor=>.3);
-
- # Autostretch individual channels
- $thumb->filter(type=>'autolevels');
-
- # try to save in one of these formats
- SAVE:
-
- for $format ( qw( png gif jpg tiff ppm ) ) {
- # Check if given format is supported
- if ($Imager::formats{$format}) {
- $file.="_low.$format";
- print "Storing image as: $file\n";
- # documented in Imager::Files
- $thumb->write(file=>$file) or
- die $thumb->errstr;
- last SAVE;
- }
- }
-
- =head1 DESCRIPTION
-
- Imager is a module for creating and altering images. It can read and
- write various image formats, draw primitive shapes like lines,and
- polygons, blend multiple images together in various ways, scale, crop,
- render text and more.
-
- =head2 Overview of documentation
-
- =over
-
- =item *
-
- Imager - This document - Synopsis, Example, Table of Contents and
- Overview.
-
- =item *
-
- L<Imager::Tutorial> - a brief introduction to Imager.
-
- =item *
-
- L<Imager::Cookbook> - how to do various things with Imager.
-
- =item *
-
- L<Imager::ImageTypes> - Basics of constructing image objects with
- C<new()>: Direct type/virtual images, RGB(A)/paletted images,
- 8/16/double bits/channel, color maps, channel masks, image tags, color
- quantization. Also discusses basic image information methods.
-
- =item *
-
- L<Imager::Files> - IO interaction, reading/writing images, format
- specific tags.
-
- =item *
-
- L<Imager::Draw> - Drawing Primitives, lines, boxes, circles, arcs,
- flood fill.
-
- =item *
-
- L<Imager::Color> - Color specification.
-
- =item *
-
- L<Imager::Fill> - Fill pattern specification.
-
- =item *
-
- L<Imager::Font> - General font rendering, bounding boxes and font
- metrics.
-
- =item *
-
- L<Imager::Transformations> - Copying, scaling, cropping, flipping,
- blending, pasting, convert and map.
-
- =item *
-
- L<Imager::Engines> - Programmable transformations through
- C<transform()>, C<transform2()> and C<matrix_transform()>.
-
- =item *
-
- L<Imager::Filters> - Filters, sharpen, blur, noise, convolve etc. and
- filter plugins.
-
- =item *
-
- L<Imager::Expr> - Expressions for evaluation engine used by
- transform2().
-
- =item *
-
- L<Imager::Matrix2d> - Helper class for affine transformations.
-
- =item *
-
- L<Imager::Fountain> - Helper for making gradient profiles.
-
- =item *
-
- L<Imager::API> - using Imager's C API
-
- =item *
-
- L<Imager::APIRef> - API function reference
-
- =item *
-
- L<Imager::Inline> - using Imager's C API from Inline::C
-
- =item *
-
- L<Imager::ExtUtils> - tools to get access to Imager's C API.
-
- =back
-
- =head2 Basic Overview
-
- An Image object is created with C<$img = Imager-E<gt>new()>.
- Examples:
-
- $img=Imager->new(); # create empty image
- $img->read(file=>'lena.png',type=>'png') or # read image from file
- die $img->errstr(); # give an explanation
- # if something failed
-
- or if you want to create an empty image:
-
- $img=Imager->new(xsize=>400,ysize=>300,channels=>4);
-
- This example creates a completely black image of width 400 and height
- 300 and 4 channels.
-
- =head1 ERROR HANDLING
-
- In general a method will return false when it fails, if it does use the errstr() method to find out why:
-
- =over
-
- =item errstr
-
- Returns the last error message in that context.
-
- If the last error you received was from calling an object method, such
- as read, call errstr() as an object method to find out why:
-
- my $image = Imager->new;
- $image->read(file => 'somefile.gif')
- or die $image->errstr;
-
- If it was a class method then call errstr() as a class method:
-
- my @imgs = Imager->read_multi(file => 'somefile.gif')
- or die Imager->errstr;
-
- Note that in some cases object methods are implemented in terms of
- class methods so a failing object method may set both.
-
- =back
-
- The C<Imager-E<gt>new> method is described in detail in
- L<Imager::ImageTypes>.
-
- =head1 METHOD INDEX
-
- Where to find information on methods for Imager class objects.
-
- addcolors() - L<Imager::ImageTypes/addcolors>
-
- addtag() - L<Imager::ImageTypes/addtag> - add image tags
-
- align_string() - L<Imager::Draw/align_string>
-
- arc() - L<Imager::Draw/arc>
-
- bits() - L<Imager::ImageTypes/bits> - number of bits per sample for the
- image
-
- box() - L<Imager::Draw/box>
-
- circle() - L<Imager::Draw/circle>
-
- colorcount() - L<Imager::Draw/colorcount>
-
- convert() - L<Imager::Transformations/"Color transformations"> -
- transform the color space
-
- copy() - L<Imager::Transformations/copy>
-
- crop() - L<Imager::Transformations/crop> - extract part of an image
-
- def_guess_type() - L<Imager::Files/def_guess_type>
-
- deltag() - L<Imager::ImageTypes/deltag> - delete image tags
-
- difference() - L<Imager::Filters/"Image Difference">
-
- errstr() - L<"Basic Overview">
-
- filter() - L<Imager::Filters>
-
- findcolor() - L<Imager::ImageTypes/findcolor> - search the image palette, if it
- has one
-
- flip() - L<Imager::Transformations/flip>
-
- flood_fill() - L<Imager::Draw/flood_fill>
-
- getchannels() - L<Imager::ImageTypes/getchannels>
-
- getcolorcount() - L<Imager::ImageTypes/getcolorcount>
-
- getcolors() - L<Imager::ImageTypes/getcolors> - get colors from the image
- palette, if it has one
-
- getcolorusage() - L<Imager::ImageTypes/getcolorusage>
-
- getcolorusagehash() - L<Imager::ImageTypes/getcolorusagehash>
-
- get_file_limits() - L<Imager::Files/"Limiting the sizes of images you read">
-
- getheight() - L<Imager::ImageTypes/getwidth>
-
- getmask() - L<Imager::ImageTypes/getmask>
-
- getpixel() - L<Imager::Draw/getpixel>
-
- getsamples() - L<Imager::Draw/getsamples>
-
- getscanline() - L<Imager::Draw/getscanline>
-
- getwidth() - L<Imager::ImageTypes/getwidth>
-
- img_set() - L<Imager::ImageTypes/img_set>
-
- init() - L<Imager::ImageTypes/init>
-
- line() - L<Imager::Draw/line>
-
- load_plugin() - L<Imager::Filters/load_plugin>
-
- map() - L<Imager::Transformations/"Color Mappings"> - remap color
- channel values
-
- masked() - L<Imager::ImageTypes/masked> - make a masked image
-
- matrix_transform() - L<Imager::Engines/matrix_transform>
-
- maxcolors() - L<Imager::ImageTypes/maxcolors>
-
- NC() - L<Imager::Handy/NC>
-
- new() - L<Imager::ImageTypes/new>
-
- newcolor() - L<Imager::Handy/newcolor>
-
- newcolour() - L<Imager::Handy/newcolour>
-
- newfont() - L<Imager::Handy/newfont>
-
- NF() - L<Imager::Handy/NF>
-
- open() - L<Imager::Files> - an alias for read()
-
- parseiptc() - L<Imager::Files/parseiptc> - parse IPTC data from a JPEG
- image
-
- paste() - L<Imager::Transformations/paste> - draw an image onto an image
-
- polygon() - L<Imager::Draw/polygon>
-
- polyline() - L<Imager::Draw/polyline>
-
- read() - L<Imager::Files> - read a single image from an image file
-
- read_multi() - L<Imager::Files> - read multiple images from an image
- file
-
- register_filter() - L<Imager::Filters/register_filter>
-
- register_reader() - L<Imager::Filters/register_reader>
-
- register_writer() - L<Imager::Filters/register_writer>
-
- rotate() - L<Imager::Transformations/rotate>
-
- rubthrough() - L<Imager::Transformations/rubthrough> - draw an image onto an
- image and use the alpha channel
-
- scale() - L<Imager::Transformations/scale>
-
- scaleX() - L<Imager::Transformations/scaleX>
-
- scaleY() - L<Imager::Transformations/scaleY>
-
- setcolors() - L<Imager::ImageTypes/setcolors> - set palette colors in
- a paletted image
-
- set_file_limits() - L<Imager::Files/"Limiting the sizes of images you read">
-
- setmask() - L<Imager::ImageTypes/setmask>
-
- setpixel() - L<Imager::Draw/setpixel>
-
- setscanline() - L<Imager::Draw/setscanline>
-
- settag() - L<Imager::ImageTypes/settag>
-
- string() - L<Imager::Draw/string> - draw text on an image
-
- tags() - L<Imager::ImageTypes/tags> - fetch image tags
-
- to_paletted() - L<Imager::ImageTypes/to_paletted>
-
- to_rgb16() - L<Imager::ImageTypes/to_rgb16>
-
- to_rgb8() - L<Imager::ImageTypes/to_rgb8>
-
- transform() - L<Imager::Engines/"transform">
-
- transform2() - L<Imager::Engines/"transform2">
-
- type() - L<Imager::ImageTypes/type> - type of image (direct vs paletted)
-
- unload_plugin() - L<Imager::Filters/unload_plugin>
-
- virtual() - L<Imager::ImageTypes/virtual> - whether the image has it's own
- data
-
- write() - L<Imager::Files> - write an image to a file
-
- write_multi() - L<Imager::Files> - write multiple image to an image
- file.
-
- =head1 CONCEPT INDEX
-
- animated GIF - L<Imager::File/"Writing an animated GIF">
-
- aspect ratio - L<Imager::ImageTypes/i_xres>,
- L<Imager::ImageTypes/i_yres>, L<Imager::ImageTypes/i_aspect_only>
-
- blend - alpha blending one image onto another
- L<Imager::Transformations/rubthrough>
-
- blur - L<Imager::Filters/guassian>, L<Imager::Filters/conv>
-
- boxes, drawing - L<Imager::Draw/box>
-
- changes between image - L<Imager::Filter/"Image Difference">
-
- color - L<Imager::Color>
-
- color names - L<Imager::Color>, L<Imager::Color::Table>
-
- combine modes - L<Imager::Fill/combine>
-
- compare images - L<Imager::Filter/"Image Difference">
-
- contrast - L<Imager::Filter/contrast>, L<Imager::Filter/autolevels>
-
- convolution - L<Imager::Filter/conv>
-
- cropping - L<Imager::Transformations/crop>
-
- CUR files - L<Imager::Files/"ICO (Microsoft Windows Icon) and CUR (Microsoft Windows Cursor)">
-
- C<diff> images - L<Imager::Filter/"Image Difference">
-
- dpi - L<Imager::ImageTypes/i_xres>,
- L<Imager::Cookbook/"Image spatial resolution">
-
- drawing boxes - L<Imager::Draw/box>
-
- drawing lines - L<Imager::Draw/line>
-
- drawing text - L<Imager::Draw/string>, L<Imager::Draw/align_string>
-
- error message - L<"Basic Overview">
-
- files, font - L<Imager::Font>
-
- files, image - L<Imager::Files>
-
- filling, types of fill - L<Imager::Fill>
-
- filling, boxes - L<Imager::Draw/box>
-
- filling, flood fill - L<Imager::Draw/flood_fill>
-
- flood fill - L<Imager::Draw/flood_fill>
-
- fonts - L<Imager::Font>
-
- fonts, drawing with - L<Imager::Draw/string>,
- L<Imager::Draw/align_string>, L<Imager::Font::Wrap>
-
- fonts, metrics - L<Imager::Font/bounding_box>, L<Imager::Font::BBox>
-
- fonts, multiple master - L<Imager::Font/"MULTIPLE MASTER FONTS">
-
- fountain fill - L<Imager::Fill/"Fountain fills">,
- L<Imager::Filters/fountain>, L<Imager::Fountain>,
- L<Imager::Filters/gradgen>
-
- GIF files - L<Imager::Files/"GIF">
-
- GIF files, animated - L<Imager::File/"Writing an animated GIF">
-
- gradient fill - L<Imager::Fill/"Fountain fills">,
- L<Imager::Filters/fountain>, L<Imager::Fountain>,
- L<Imager::Filters/gradgen>
-
- guassian blur - L<Imager::Filter/guassian>
-
- hatch fills - L<Imager::Fill/"Hatched fills">
-
- ICO files - L<Imager::Files/"ICO (Microsoft Windows Icon) and CUR (Microsoft Windows Cursor)">
-
- invert image - L<Imager::Filter/hardinvert>
-
- JPEG - L<Imager::Files/"JPEG">
-
- limiting image sizes - L<Imager::Files/"Limiting the sizes of images you read">
-
- lines, drawing - L<Imager::Draw/line>
-
- matrix - L<Imager::Matrix2d>,
- L<Imager::Transformations/"Matrix Transformations">,
- L<Imager::Font/transform>
-
- metadata, image - L<Imager::ImageTypes/"Tags">
-
- mosaic - L<Imager::Filter/mosaic>
-
- noise, filter - L<Imager::Filter/noise>
-
- noise, rendered - L<Imager::Filter/turbnoise>,
- L<Imager::Filter/radnoise>
-
- paste - L<Imager::Transformations/paste>,
- L<Imager::Transformations/rubthrough>
-
- pseudo-color image - L<Imager::ImageTypes/to_paletted>,
- L<Imager::ImageTypes/new>
-
- posterize - L<Imager::Filter/postlevels>
-
- png files - L<Imager::Files>, L<Imager::Files/"PNG">
-
- pnm - L<Imager::Files/"PNM (Portable aNy Map)">
-
- rectangles, drawing - L<Imager::Draw/box>
-
- resizing an image - L<Imager::Transformations/scale>,
- L<Imager::Transformations/crop>
-
- RGB (SGI) files - L<Imager::Files/"SGI (RGB, BW)">
-
- saving an image - L<Imager::Files>
-
- scaling - L<Imager::Transformations/scale>
-
- SGI files - L<Imager::Files/"SGI (RGB, BW)">
-
- sharpen - L<Imager::Filters/unsharpmask>, L<Imager::Filters/conv>
-
- size, image - L<Imager::ImageTypes/getwidth>,
- L<Imager::ImageTypes/getheight>
-
- size, text - L<Imager::Font/bounding_box>
-
- tags, image metadata - L<Imager::ImageTypes/"Tags">
-
- text, drawing - L<Imager::Draw/string>, L<Imager::Draw/align_string>,
- L<Imager::Font::Wrap>
-
- text, wrapping text in an area - L<Imager::Font::Wrap>
-
- text, measuring - L<Imager::Font/bounding_box>, L<Imager::Font::BBox>
-
- tiles, color - L<Imager::Filter/mosaic>
-
- unsharp mask - L<Imager::Filter/unsharpmask>
-
- watermark - L<Imager::Filter/watermark>
-
- writing an image to a file - L<Imager::Files>
-
- =head1 SUPPORT
-
- The best place to get help with Imager is the mailing list.
-
- To subscribe send a message with C<subscribe> in the body to:
-
- imager-devel+request@molar.is
-
- or use the form at:
-
- =over
-
- L<http://www.molar.is/en/lists/imager-devel/>
-
- =back
-
- where you can also find the mailing list archive.
-
- You can report bugs by pointing your browser at:
-
- =over
-
- L<https://rt.cpan.org/NoAuth/ReportBug.html?Queue=Imager>
-
- =back
-
- or by sending an email to:
-
- =over
-
- bug-Imager@rt.cpan.org
-
- =back
-
- Please remember to include the versions of Imager, perl, supporting
- libraries, and any relevant code. If you have specific images that
- cause the problems, please include those too.
-
- If you don't want to publish your email address on a mailing list you
- can use CPAN::Forum:
-
- http://www.cpanforum.com/dist/Imager
-
- You will need to register to post.
-
- =head1 CONTRIBUTING TO IMAGER
-
- =head2 Feedback
-
- I like feedback.
-
- If you like or dislike Imager, you can add a public review of Imager
- at CPAN Ratings:
-
- http://cpanratings.perl.org/dist/Imager
-
- This requires a Bitcard Account (http://www.bitcard.org).
-
- You can also send email to the maintainer below.
-
- If you send me a bug report via email, it will be copied to RT.
-
- =head2 Patches
-
- I accept patches, preferably against the main branch in subversion.
- You should include an explanation of the reason for why the patch is
- needed or useful.
-
- Your patch should include regression tests where possible, otherwise
- it will be delayed until I get a chance to write them.
-
- =head1 AUTHOR
-
- Tony Cook <tony@imager.perl.org> is the current maintainer for Imager.
-
- Arnar M. Hrafnkelsson is the original author of Imager.
-
- Many others have contributed to Imager, please see the README for a
- complete list.
-
- =head1 SEE ALSO
-
- L<perl>(1), L<Imager::ImageTypes>(3), L<Imager::Files>(3),
- L<Imager::Draw>(3), L<Imager::Color>(3), L<Imager::Fill>(3),
- L<Imager::Font>(3), L<Imager::Transformations>(3),
- L<Imager::Engines>(3), L<Imager::Filters>(3), L<Imager::Expr>(3),
- L<Imager::Matrix2d>(3), L<Imager::Fountain>(3)
-
- L<http://imager.perl.org/>
-
- L<Affix::Infix2Postfix>(3), L<Parse::RecDescent>(3)
-
- Other perl imaging modules include:
-
- L<GD>(3), L<Image::Magick>(3), L<Graphics::Magick>(3).
-
- =cut
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