6 use File::Basename qw(basename);
13 my $backup; # backup extension name
14 my $directory; # output directory
17 my %write_opts; # options supplied to write()
20 my @collection; # actions/options in order to allow us to set values as needed
22 # each entry consists of:
23 # - ref to action/option handler function
25 # - optional ref to value parser function
27 my %funcs = im_functions();
28 my %options = im_options();
29 my %all = ( %funcs, %options );
33 my ($option, $value) = @_;
34 if ($all{$option}[1] && ref $all{$option}[1]) {
35 $value = $all{$option}[1]->($option, $value);
37 push @collection, [ $option, $value ]
51 for my $option_name (keys %all) {
52 my $option = $all{$option_name};
53 my @names = ( $option_name );
54 my @other_names = split /\|/, $option->[2] if $option->[2];
55 push @names, @other_names;
58 $code = ref $option->[1] ? "=s" : "=".$option->[1];
60 push @getoptions, join("|", @names) . $code => $action_func;
61 # this would be evil $all{$_} = $option for @other_names;
62 push @getoptions, join("|", map "help-$_", @names) => $help_func;
65 GetOptions('help' => sub { $help_func->("synopsis") },
66 'verbose|v+' => \$verbose,
67 'backup|i=s' => \$backup,
68 'directory|d=s' => \$directory,
69 'type|t=s' => \$type, # output file type
70 'write-option|wo=s' => \%write_opts,
71 'output|o=s' => \$output,
72 'understand' => \$understand,
76 'help-color-spec' => sub { $help_func->("color specifications") },
77 'help-actions' => sub { $help_func->("actions") },
78 'help-options' => sub { $help_func->("processing options") },
79 'help-general' => sub { $help_func->("general options") },
85 unless ($understand) {
87 This tool is under-tested and will probably destroy your data.
89 If you understand and agree with this use the --understand option.
91 In fact, only the --info and --tags actions have been used at all.
96 exists $write_opts{file}
97 and die "Illegal write option 'file'\n";
98 exists $write_opts{type}
99 and die "Use the --type option to set the output format\n";
101 delete $write_opts{qw/file fd fh data callback/};
103 my @actions = grep $funcs{$_->[0]}, @collection;
107 print $funcs{$_}[1] for map $_->[0], @actions;
115 if (!@actions && !@ARGV) {
120 die "No files to process\n";
124 die "Nothing to do, supply at least one action, see $0 --help\n";
128 push @type, type => $type if $type;
130 for my $name (@ARGV) {
131 my $im = Imager->new;
132 if ($im->read(file=>$name)) {
133 my %state = ( filename => $name );
135 for my $action (@collection) {
136 $im = $all{$action->[0]}[0]->($im, $action->[1], \%state);
144 (undef, undef, $file) = File::Spec->split_path($outname);
145 $outname = File::Spec->catfile($directory, $file);
148 my $backfile = $name . $backup;
149 rename $name, $backfile
150 or die "Couldn't rename source '$name' to backup '$backfile': $!\n";
153 unless ($im->write(file=>$outname, @type)) {
154 die "Could not write result from '$name' to '$outname': ", $im->errstr,"\n";
159 print STDERR "Failed reading $name: ",$im->errstr,"\n";
164 my ($im, $state, $format) = @_;
168 f => [ 's', $state->{filename} ],
169 b => [ 's', basename($state->{filename}) ],
170 w => [ 'd', $im->getwidth ],
171 h => [ 'd', $im->getheight ],
172 c => [ 'd', $im->getchannels ],
173 t => [ 's', $im->type ],
174 n => [ 'c', ord("\n") ], # a bit of a hack
178 $format =~ s{%(-?(?:\d+(?:\.\d*)?|\.\d+)?)([fwhctbn%])}
180 my $which = $replace{$2};
181 push @values, @$which[1..$#$which];
185 return sprintf $format, @values;
189 my ($im, $ignored, $state) = @_;
191 my $format = $state->{info_format} || <<EOS;
193 Dimensions: %ww x %hh
198 print _replace_codes($im, $state, $format);
203 sub req_info_format {
204 my ($im, $value, $state) = @_;
206 $state->{info_format} = $value;
212 my ($im, $ignored, $state) = @_;
214 print $state->{filename},"\n";
215 my @tags = $im->tags;
216 for my $tag (sort { $a->[0] cmp $b->[0] } @tags) {
217 my $name = shift @$tag;
218 print " $name: @$tag\n";
225 my ($im, $ignored, $state) = @_;
227 print $state->{filename},"\n";
228 if ($im->type eq 'direct') {
229 print " No palette - this is a direct color image\n";
232 my @colors = $im->getcolors;
233 for my $index (0..$#colors) {
234 printf "%3d: (%3d, %3d, %3d)\n", $index, ($colors[$index]->rgba)[0..2];
242 my ($option, $value) = @_;
245 if ($option =~ /^(\d+)\s*x\s*(\d+)$/i) {
246 return { xpixels=>$1, ypixels=>$2 };
248 elsif ($option =~ /^(\d+(?:\.\d*)?|\.\d+)$/) {
249 return { scalefactor => $option };
251 elsif ($option =~ /^(\d+)\s*x\s*(\d+)\s*min$/i) {
252 return { xpixels=>$1, ypixels=>$2, type=>'min' };
254 elsif ($option =~ /^(\d+)\s*(?:w|wide)$/i) {
255 return { xpixels => $1 };
257 elsif ($option =~ /^(\d+)\s*(?:h|high)$/i) {
258 return { ypixels => $1 };
261 die "Invalid parameter to --scale, try $0 --help-scale\n";
266 my ($im, $args) = @_;
268 return $im->scale(%$args);
272 my ($option, $value) = @_;
274 if ($value =~ /^[-+]?(?:\d+(?:\.\d*)|\.\d+)$/) {
275 return { degrees => $value };
277 elsif ($value =~ /^([-+]?(?:\d+(?:\.\d*)|\.\d+))\s*(?:r|radians)$/i) {
278 return { radians => $1 };
281 die "Invalid parameter to --rotate, try $0 --help-rotate\n";
286 my ($im, $args, $state) = @_;
289 if ($state->{background}) {
290 push @moreargs, back => $state->{background};
292 return $im->rotate(%$args, @moreargs);
296 my ($im, $value, $state) = @_;
298 $state->{background} = $value;
304 my ($im, $value, $state) = @_;
306 $state->{foreground} = $value;
312 my ($im, $value, $state) = @_;
314 $state->{font} = Imager::Font->new(file=>$value)
315 or die "Could not create font from $value: ", Imager->errstr,"\n";
321 my ($option, $value) = @_;
323 unless ($value =~ /^\d+$/ && $value > 0) {
324 die "$option must be a positive integer\n";
331 my ($im, $value, $state) = @_;
333 $state->{font_size} = $value;
339 my ($im, $format, $state) = @_;
341 my $text = _replace_codes($im, $state, $format);
343 my $font = $state->{font}
344 or die "You must supply a --font option before the --caption command\n";
346 my $size = $state->{font_size} || 16;
348 my $box = $font->bounding_box(size=>$size);
349 $box->total_width <= $im->getwidth
350 or die "Caption text '$text' is wider (", $box->total_width,
351 ") than the image (",$im->getwidth,")\n";
353 die "not implemented yet";
364 info => [ \&req_info ],
365 tags => [ \&req_tags ],
366 palette => [ \&req_palette ],
367 scale => [ \&req_scale, \&val_scale ],
368 rotate => [ \&req_rotate, \&val_rotate ],
369 # caption => [ \&req_caption ], # not done yet
374 my ($option, $value) = @_;
376 if ($value =~ /^rgba\((\d+),(\d+),(\d+),(\d+)\)$/i) {
377 return Imager::Color->new($1,$2,$3,$4);
379 elsif ($value =~ /^rgb\((\d+),(\d+),(\d+)\)$/i) {
380 return Imager::Color->new($1,$2,$3);
382 elsif ($value =~ /^\#[\da-f]{3}([\da-f]{3})?$/) {
383 return Imager::Color->new(web=>$value);
385 elsif ($value =~ /^hsv\((\d+(?:\.\d*)),(\d+\.\d*|\.\d+),(\d+\.\d*|\.\d+)\)$/) {
386 return Imager::Color->new(hsv => [ $1, $2, $3 ]);
388 elsif ($value =~ /^hsva\((\d+(?:\.\d*)),(\d+\.\d*|\.\d+),(\d+\.\d*|\.\d+),(\d+)\)$/) {
389 return Imager::Color->new(hsv => [ $1, $2, $3 ], alpha=>$4);
392 my $color = Imager::Color->new(name=>$value);
393 return $color if $color;
395 die "Unrecognized color specification $value supplied to --$option\n";
402 background => [ \&req_bg, \&val_color, 'bg' ],
403 foreground => [ \&req_fg, \&val_color, 'fg' ],
404 'info-format' => [ \&req_info_format, 's'],
405 font => [ \&req_font, \&val_font ],
406 'font-size' => [ \&req_font_size, \&val_font_size, 'fs' ],
413 open SOURCE, "< $0" or die "Cannot read source for help text: $!\n";
417 if (/^=item --$topic\s/) {
419 # read any more =items then read text until we see =item or =back
421 last unless /^\s*$/ or /^=item /;
425 # and any other until another option or =back
427 last if /^=(item|cut|back)/;
433 elsif (/^=head(\d) $topic\s*$/i) {
437 last if /=head[1-$level]/;
447 die "No help topic $topic found\n";
451 sub help_color_spec {
458 imager - Imager command-line image manipulation tool
463 imager [--font-size <size>] [--fs <size>] [--background <color>]
464 [--bg <color>] [--foreground <color>] [--fg <color]
465 [--info-format <format>] [--rotate <angle>] [--scale <scale-spec>]
466 [--caption <text>] [--info] [--tags] [--font fontfile] files ...
467 imager --help-I<option>
468 imager --help-I<operation>
469 imager --help-options
470 imager --help-actions
471 imager --help-general
481 Displays the width, height, channels, type for each image, and any tags
482 Imager picks up. No options.
484 Note: Imager still converts many files into direct images when the source
485 is a paletted image, so the displayed image type may not match the
488 No output image file is produced.
492 Displays all the tags the Imager reader for that format sets for each
495 See L<Imager::Files> for file format specific tags and
496 L<Imager::ImageTypes> for common tags.
500 Dumps the palette of the given file, if it is an indexed image.
502 =item --scale <scalefactor>
504 =item --scale <width>x<height>
506 =item --scale <width>x<height>min
508 =item --scale <width>w
510 =item --scale <height>h
512 Scale either by the given scaling factor, given as a floating point number,
513 or to a given dimension.
515 The scaling is always proportional, if a dimension is given then the
516 scalefactor that results in the larger image that matches either the
517 specified width or height is chosen, unless the word "min" is present".
519 --scale 0.5 # half size image
520 --scale 100x100 # aim for 100 pixel x 100 pixel image
521 --scale 100x100min # image that fits in 100 x 100 pixel box
522 --scale 100w # 100 pixel wide image
523 --scale 100h # 100 pixel high image
525 =item --rotate <degrees>
527 =item --rotate <radians>r
529 Rotate the image by the given number of degrees or radians.
533 Displays the usage message if no extra parameter is found, otherwise displays
534 more detailed help for the given function, if any.
540 Expands the image to create a caption area and draws the given text in the
543 You must set a font with --font before this.
545 imager --font arial.ttf --caption "my silly picture"
547 The text has the same replacements done as the --info command.
549 imager --font arial.ttf --caption '%b - %w x %h'
551 If the caption text is too wide for the image an error is produced.
553 Any newlines that aren't at the beginning or end of the caption cause
554 multiple lines of text to be produced.
556 The --foreground and --background options can be used to set colors
557 for this. By default black text on a white background is produced.
561 =head1 GENERAL OPTIONS
567 Display the SYNOPSIS from this POD
573 Increase the verbosity level.
575 =item --backup <extension>
579 Input files are renamed to I<filename><extension> before the output
582 =item --directory <directory>
586 If this is supplied the output files are written to this directory
589 =item --type <fileformat>
591 Specifies an output file format
593 =item --write-option name=value
595 =item --wo name=value
597 Sets the value of an option supplied to the Imager write() function.
598 The options available depend on the file format, see
599 L<Imager::Files/TYPE SPECIFIC INFORMATION> for file format specific
602 You can also supply the L<Imager::ImageTypes/Common Tags>.
604 If you're writing to a gif file you can also supply the options
605 documented as tags under L<Imager::ImageTypes/Quantization options>.
609 =head1 PROCESSING OPTIONS
611 These supply extra parameters to the actions
615 =item --background <color-spec>
617 =item --bg <color-spec>
619 Sets the background color for the --rotate and --caption actions, and
620 possibly other actions in the future.
622 See $0 --help-color-spec for possible color specifications.
627 =item --foreground <color-spec>
629 =item --fg <color-spec>
631 Sets the foreground color for the --caption action, and possibly other
632 actions in the future.
634 See $0 --help-color-spec for possible color specifications.
639 =item --font-size size
643 Set the font size used by the --caption command, in pixels.
645 --fs 16 # 16 pixels from baseline to top
646 --font-size 40 # a bit bigger
648 =item --info-format format
650 Sets the format for the output of the --info command.
652 The format can contain printf style replacement codes, each value is %
653 followed by a sprintf() field width/precision, followed by the value
656 The following values can be output:
657 w - image width in pixels
658 h - image height in pixels
659 f - full image filename
660 b - base image filename
661 c - number of channels
662 t - image type (direct vs paletted)
663 n - inserts a newline
664 % - inserts a '%' symbol
666 The default format is:
668 Image: %f%nDimensions: %ww x %hh%nChannels: %c%nType: %t%n
670 You can use field widths to produce a more table like appearance:
672 im --info-format '%4w %4h %4c %-8t %b%n' --info *.jpg
674 =item --font filename
676 Gives the name of a font file. Required by actions that render text.
683 =head1 COLOR SPECIFICATIONS
685 Possible color specifications:
686 color-name - the name of a built-in color
687 rgb(red,green,blue) - as an RGB triplet
688 #RRGGBB - as a HTML RGB hex triple
689 #RGB - as a HTML CSS RGB hex triple
690 rgba(red,green,blue,alpha) - as an RGBA quad
691 hsv(hue,sat,value) - as an HSV triplet
692 hsva(hue,sat,value,alpha) as an HSVA quad
701 If you use either of the HTML color specifications, or a specification
702 using parentheses from a Unix shell you will need to quote it, for
706 --bg 'rgb(255,0,255)'
710 Tony Cook <tony@develop-help.com>