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{ |
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=head1 NAME |
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Image::Shoehorn - massage the dimensions and filetype of an image |
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=head1 SYNOPSIS |
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use Image::Shoehorn; |
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use Data::Dumper; |
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my $image = Image::Shoehorn->new({ |
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tmpdir => "/usr/tmp", |
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cleanup => \&my_cleanup |
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}) || die Image::Shoehorn->last_error(); |
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my $imgs = $image->import({ |
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source => "/some/large/image.jpg", |
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max_height => 600, |
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valid => [ "png" ], |
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convert => 1, |
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scale => { thumb => "x50", small => "50%" }, |
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overwrite => 1, |
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}) || die Image::Shoehorn->last_error(); |
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print &Dumper($imgs); |
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=head1 DESCRIPTION |
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Image::Shoehorn will massage the dimensions and filetype of an image, |
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optionally creating one or more "scaled" copies. |
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It uses Image::Magick to do the heavy lifting and provides a single |
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"import" objet method to hide a number of tasks from the user. |
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=head1 RATIONALE |
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Just before I decided to submit this package to the CPAN, I noticed that |
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Lee Goddard had just released Image::Magick::Thumbnail. Although there is |
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a certain amount of overlap, creating thumbnails is only a part of the |
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functionality of Image::Shoehorn. |
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Image::Shoehorn is designed for taking a single image, optionally converting |
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its file type and resizing it, and then creating one or more "scaled" |
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versions of the (modified) image. |
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One example would be a photo-gallery application where the gallery may define |
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(n) number of scaled versions. In a mod_perl context, if the scaled image had |
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not already been created, the application might create the requested image |
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for the request and then register a cleanup handler to create the remaining |
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"scaled" versions. Additionally, scaled images may be defined as "25%", "x50", |
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"200x" or "25x75" (Apache::Image::Shoehorn is next...) |
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=head1 SHOEHORN ?! |
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This package started life as Image::Import; designed to slurp and munge images |
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into a database. It's not a very exciting name and, further, is a bit ambiguous. |
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So, I started fishing around for a better name and for a while I was thinking |
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about Image::Tailor - a module for taking in the "hem" of an image, of fussing |
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and making an image fit properly. |
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When I asked the Dict servers for a definition of "tailor", it returned a |
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WordNet entry containing the definition... |
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make fit for a specific purpose [syn: {shoehorn}] |
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..and that was that. |
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=cut |
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package Image::Shoehorn; |
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use strict; |
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$Image::Shoehorn::VERSION = '1.42'; |
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1
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1
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use File::Basename; |
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use Carp; |
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use Error; |
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# use Data::Dumper; |
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1
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use Image::Magick 5.44; |
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0
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use File::MMagic; |
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=head1 PACKAGE METHODS |
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=cut |
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=head2 __PACKAGE__->last_error() |
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Returns the last error recorded by the object. |
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=cut |
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sub last_error { |
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my $pkg = shift; |
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my $e = shift; |
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if ($e) { |
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my $caller = (caller(1))[3]; |
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Error::Simple->record("[$caller] $e."); |
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return 1; |
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} |
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return Error->prior(); |
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} |
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=head2 __PACKAGE__->dimensions_for_scale($x,$y,$scale) |
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112
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=cut |
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sub dimensions_for_scale { |
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my $pkg = shift; |
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my $x = shift; |
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my $y = shift; |
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my $scale = shift; |
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if ($scale =~ /^(\d+)x(\d+)$/) { |
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$x = $1; |
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$y = $2; |
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} |
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elsif ($scale =~ /^(\d+)%$/) { |
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$x = ($x/100) * $1; |
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$y = ($y/100) * $1; |
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} |
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elsif ($scale =~ /^(\d+)x$/) { |
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($x,$y) = __PACKAGE__->scaled_dimensions([$x,$y,$1,undef]); |
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} |
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elsif ($scale =~ /^x(\d+)$/) { |
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($x,$y) = __PACKAGE__->scaled_dimensions([$x,$y,undef,$1]); |
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} |
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138
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else { |
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return (); |
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} |
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142
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return (int($x),int($y)); |
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} |
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145
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=head2 __PACKAGE__->scaled_name([$source,$scale]) |
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147
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=cut |
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149
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sub scaled_name { |
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my $pkg = shift; |
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my $args = shift; |
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153
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my $scaled = &basename($args->[0]); |
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155
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my $id = ($args->[1]) ? "-$args->[1]" : ""; |
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157
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$scaled =~ s/(.*)(\.[^\.]+)$/$1$id$2/; |
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$scaled =~ s/%/percent/; |
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160
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return $scaled; |
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} |
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163
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=head2 __PACKAGE__->converted_name([$source,$type]) |
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165
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=cut |
166
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167
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sub converted_name { |
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my $pkg = shift; |
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my $args = shift; |
170
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171
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if (! $args->[1]) { return $args->[0]; } |
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173
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my $converted = $args->[0]; |
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$converted =~ s/^(.*)\.([^\.]+)$/$1\.$args->[1]/; |
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176
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return $converted; |
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} |
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179
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=head2 __PACKAGE__->scaled_dimensions([$cur_x,$cur_y,$new_x,$new_y]) |
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181
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=cut |
182
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183
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sub scaled_dimensions { |
184
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my $pkg = shift; |
185
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my $width = $_[0]->[0]; |
186
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my $height = $_[0]->[1]; |
187
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my $x = $_[0]->[2] || $width; |
188
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my $y = $_[0]->[3] || $height; |
189
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190
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if (($width == $x) && ($height == $y)) { |
191
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return ($x,$y); |
192
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} |
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194
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# |
195
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196
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foreach ($width, $height, $x, $y) { |
197
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if ($_ < 1) { |
198
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carp "Dimension (width:$width, height:$height, x:$x, y:$y) less than one. ". |
199
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"Returning 0,0 to avoid possible divide by zero error.\n"; |
200
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201
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return (0,0); |
202
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} |
203
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} |
204
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205
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# |
206
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207
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my $h_percentage = $y / $height; |
208
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my $w_percentage = $x / $width; |
209
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my $percentage = 100; |
210
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211
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if (($x) && ($y )) { $percentage = ($h_percentage <= $w_percentage) ? $h_percentage : $w_percentage; } |
212
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if (($x) && (!$y)) { $percentage = $w_percentage; } |
213
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if ((!$x) && ($y )) { $percentage = $h_percentage; } |
214
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215
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$x = int($width * $percentage); |
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$y = int($height * $percentage); |
217
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218
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return ($x,$y); |
219
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} |
220
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221
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=head2 $pkg = __PACKAGE__->new(\%args) |
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223
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Object constructor. Valid arguments are : |
224
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225
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=over 4 |
226
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227
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=item * |
228
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229
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B |
230
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231
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String. |
232
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233
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The path to a directory where your program has permissions to create new files. I |
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=item * |
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B |
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239
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Code reference. |
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By default, any new images that are created, in the tmp directory, are deleted |
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when a different image is imported or when the I |
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method is invoked. |
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You may optionally provide your own cleanup method which will be called in |
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place. |
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Your method will be passed a hash reference where the keys are "source" and |
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any other names you may define in the I parameter of the I |
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object method. Each key points to a hash reference whose keys are : |
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=over 4 |
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=item * |
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256
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I |
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258
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=item * |
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I |
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262
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=item * |
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I |
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=item * |
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268
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I |
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=item * |
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I |
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=back |
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Note that this method will only affect B images. The original source file |
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may be altered, if it is imported with the I parameter, but will |
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not be deleted. |
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=back |
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Returns an object. Woot! |
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284
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=cut |
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286
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sub new { |
287
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my $pkg = shift; |
288
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289
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my $self = {}; |
290
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bless $self,$pkg; |
291
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292
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if (! $self->init(@_)) { |
293
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return undef; |
294
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} |
295
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return $self |
297
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} |
298
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299
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sub init { |
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my $self = shift; |
301
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my $args = shift; |
302
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303
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if (! -d $args->{'tmpdir'} ) { |
304
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$self->last_error("Unable to locate tmp dir"); |
305
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return 0; |
306
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} |
307
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308
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if (($args->{'cleanup'}) && (ref($args->{'cleanup'}) ne "CODE")) { |
309
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$self->last_error("Cleanup is not a code reference."); |
310
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return 0; |
311
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} |
312
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313
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if (! $self->_magick()) { |
314
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$self->last_error("Unable to get Image::Magick : $!"); |
315
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return 0; |
316
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} |
317
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318
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$self->{'__cleanup'} = $args->{'cleanup'}; |
319
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$self->{'__tmpdir'} = $args->{'tmpdir'}; |
320
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return 1; |
321
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} |
322
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323
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=head1 OBJECT METHODS |
324
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325
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=cut |
326
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327
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=head2 $obj->import(\%args) |
328
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329
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Valid arguments are : |
330
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331
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=over 4 |
332
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333
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=item * |
334
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335
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B |
336
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337
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String. |
338
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339
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The path to the image you are trying to import. If ImageMagick can read it, |
340
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you can import it. |
341
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342
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I |
343
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344
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=item * |
345
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346
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B |
347
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348
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Int. |
349
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350
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The maximum width that the image you are importing may be. Height is scaled |
351
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accordingly. |
352
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353
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=item * |
354
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355
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B |
356
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357
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Int. |
358
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359
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The maximum height that the image you are importing may be. Width is scaled |
360
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accordingly. |
361
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362
|
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=item * |
363
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364
|
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B |
365
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366
|
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|
Hash reference. |
367
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368
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One or more key-value pairs that define scaling dimensions for creating |
369
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|
multiple instances of the current image. |
370
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371
|
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|
The key is a human readable label because humans are simple that way. The |
372
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|
|
key may be anything you'd like B "source" which is reserved for the |
373
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|
|
image the object is munging. |
374
|
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|
375
|
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|
The value for a given key is the dimension flag which may be represented as : |
376
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|
377
|
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|
|
=over 4 |
378
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379
|
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=item * |
380
|
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381
|
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B% |
382
|
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383
|
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|
=item * |
384
|
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385
|
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|
BxB |
386
|
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|
387
|
|
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|
=item * |
388
|
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|
389
|
|
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|
xB |
390
|
|
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|
391
|
|
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|
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|
|
=item * |
392
|
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393
|
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|
Bx |
394
|
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|
395
|
|
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|
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|
|
=back |
396
|
|
|
|
|
|
|
|
397
|
|
|
|
|
|
|
Note that images are scaled B the original source file may have been |
398
|
|
|
|
|
|
|
resized according to the I, I flags and I |
399
|
|
|
|
|
|
|
flags. |
400
|
|
|
|
|
|
|
|
401
|
|
|
|
|
|
|
Scaled images are created in the I defined in the object constructor. |
402
|
|
|
|
|
|
|
|
403
|
|
|
|
|
|
|
=item * |
404
|
|
|
|
|
|
|
|
405
|
|
|
|
|
|
|
B |
406
|
|
|
|
|
|
|
|
407
|
|
|
|
|
|
|
Array reference. |
408
|
|
|
|
|
|
|
|
409
|
|
|
|
|
|
|
An list of valid file-types for which I has encoding support. |
410
|
|
|
|
|
|
|
|
411
|
|
|
|
|
|
|
=item * |
412
|
|
|
|
|
|
|
|
413
|
|
|
|
|
|
|
B |
414
|
|
|
|
|
|
|
|
415
|
|
|
|
|
|
|
Boolean. |
416
|
|
|
|
|
|
|
|
417
|
|
|
|
|
|
|
If this value is true and the source does not a valid file-type, the method |
418
|
|
|
|
|
|
|
will create a temporary file attempt to convert it to one of the specified |
419
|
|
|
|
|
|
|
valid file-types. The method will try to convert in the order the valid |
420
|
|
|
|
|
|
|
file-types are specified, stopping on success. |
421
|
|
|
|
|
|
|
|
422
|
|
|
|
|
|
|
=item * |
423
|
|
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|
|
|
|
|
424
|
|
|
|
|
|
|
B |
425
|
|
|
|
|
|
|
|
426
|
|
|
|
|
|
|
Code reference. |
427
|
|
|
|
|
|
|
|
428
|
|
|
|
|
|
|
Define a per instance cleanup function for an image. This functions exactly |
429
|
|
|
|
|
|
|
the same way that a cleanup function defined in the object constructor does, |
430
|
|
|
|
|
|
|
except that it is forgotten as soon as a new image is imported. |
431
|
|
|
|
|
|
|
|
432
|
|
|
|
|
|
|
=item * |
433
|
|
|
|
|
|
|
|
434
|
|
|
|
|
|
|
B |
435
|
|
|
|
|
|
|
|
436
|
|
|
|
|
|
|
Boolean. |
437
|
|
|
|
|
|
|
|
438
|
|
|
|
|
|
|
Indicates whether or not to preserve the source file. By default, the package |
439
|
|
|
|
|
|
|
will B perform munging on the source file itself and will instead create |
440
|
|
|
|
|
|
|
a new file in the I defined in the object constructor. |
441
|
|
|
|
|
|
|
|
442
|
|
|
|
|
|
|
=back |
443
|
|
|
|
|
|
|
|
444
|
|
|
|
|
|
|
Returns a hash reference with information for the source image -- note that |
445
|
|
|
|
|
|
|
this may or may not be the input document, but the newly converted/resized |
446
|
|
|
|
|
|
|
image created in you tmp directory -- and any scaled images you may have |
447
|
|
|
|
|
|
|
defined. |
448
|
|
|
|
|
|
|
|
449
|
|
|
|
|
|
|
The keys of the hash are human readable names. The values are hash references |
450
|
|
|
|
|
|
|
whose keys are : |
451
|
|
|
|
|
|
|
|
452
|
|
|
|
|
|
|
=over 4 |
453
|
|
|
|
|
|
|
|
454
|
|
|
|
|
|
|
=item * |
455
|
|
|
|
|
|
|
|
456
|
|
|
|
|
|
|
I |
457
|
|
|
|
|
|
|
|
458
|
|
|
|
|
|
|
=item * |
459
|
|
|
|
|
|
|
|
460
|
|
|
|
|
|
|
I |
461
|
|
|
|
|
|
|
|
462
|
|
|
|
|
|
|
=item * |
463
|
|
|
|
|
|
|
|
464
|
|
|
|
|
|
|
I |
465
|
|
|
|
|
|
|
|
466
|
|
|
|
|
|
|
=item * |
467
|
|
|
|
|
|
|
|
468
|
|
|
|
|
|
|
I |
469
|
|
|
|
|
|
|
|
470
|
|
|
|
|
|
|
=item * |
471
|
|
|
|
|
|
|
|
472
|
|
|
|
|
|
|
I |
473
|
|
|
|
|
|
|
|
474
|
|
|
|
|
|
|
=item * |
475
|
|
|
|
|
|
|
|
476
|
|
|
|
|
|
|
I |
477
|
|
|
|
|
|
|
|
478
|
|
|
|
|
|
|
=item * |
479
|
|
|
|
|
|
|
|
480
|
|
|
|
|
|
|
I |
481
|
|
|
|
|
|
|
|
482
|
|
|
|
|
|
|
Deprecated in favour or I |
483
|
|
|
|
|
|
|
|
484
|
|
|
|
|
|
|
=back |
485
|
|
|
|
|
|
|
|
486
|
|
|
|
|
|
|
If there was an error, the method will return undef. |
487
|
|
|
|
|
|
|
|
488
|
|
|
|
|
|
|
=cut |
489
|
|
|
|
|
|
|
|
490
|
|
|
|
|
|
|
sub import { |
491
|
|
|
|
|
|
|
my $self = shift; |
492
|
|
|
|
|
|
|
my $args = shift; |
493
|
|
|
|
|
|
|
|
494
|
|
|
|
|
|
|
# |
495
|
|
|
|
|
|
|
|
496
|
|
|
|
|
|
|
if (! -e $args->{'source'}) { |
497
|
|
|
|
|
|
|
$self->last_error("Unknown file $args->{'source'}"); |
498
|
|
|
|
|
|
|
return undef; |
499
|
|
|
|
|
|
|
} |
500
|
|
|
|
|
|
|
|
501
|
|
|
|
|
|
|
if (($args->{'cleanup'}) && (ref($args->{'cleanup'}) ne "CODE")) { |
502
|
|
|
|
|
|
|
$self->last_error("Cleanup is not a code reference."); |
503
|
|
|
|
|
|
|
return undef; |
504
|
|
|
|
|
|
|
} |
505
|
|
|
|
|
|
|
|
506
|
|
|
|
|
|
|
if (! $self->_magick()->Ping($args->{'source'})) { |
507
|
|
|
|
|
|
|
$self->last_error("Unable to ping $args->{'source'}: $!"); |
508
|
|
|
|
|
|
|
return undef; |
509
|
|
|
|
|
|
|
} |
510
|
|
|
|
|
|
|
|
511
|
|
|
|
|
|
|
# |
512
|
|
|
|
|
|
|
|
513
|
|
|
|
|
|
|
if (($self->{'__source'}) && ($args->{'source'} ne $self->{'__source'})) { |
514
|
|
|
|
|
|
|
$self->_cleanup(); |
515
|
|
|
|
|
|
|
} |
516
|
|
|
|
|
|
|
|
517
|
|
|
|
|
|
|
if ($args->{'cleanup'}) { |
518
|
|
|
|
|
|
|
$self->{'__instancecleanup'} = $args->{'cleanup'}; |
519
|
|
|
|
|
|
|
} |
520
|
|
|
|
|
|
|
|
521
|
|
|
|
|
|
|
# |
522
|
|
|
|
|
|
|
|
523
|
|
|
|
|
|
|
$self->{'__source'} = $args->{'source'}; |
524
|
|
|
|
|
|
|
$self->{'__dest'} = $self->{'__source'}; |
525
|
|
|
|
|
|
|
|
526
|
|
|
|
|
|
|
unless ($args->{'overwrite'}) { |
527
|
|
|
|
|
|
|
$self->{'__dest'} = "$self->{'__tmpdir'}/".&basename($args->{'source'}); |
528
|
|
|
|
|
|
|
} |
529
|
|
|
|
|
|
|
|
530
|
|
|
|
|
|
|
# |
531
|
|
|
|
|
|
|
|
532
|
|
|
|
|
|
|
if (! $self->_process($args)) { |
533
|
|
|
|
|
|
|
return undef; |
534
|
|
|
|
|
|
|
} |
535
|
|
|
|
|
|
|
|
536
|
|
|
|
|
|
|
# |
537
|
|
|
|
|
|
|
|
538
|
|
|
|
|
|
|
my $validation = $self->_validate($args); |
539
|
|
|
|
|
|
|
|
540
|
|
|
|
|
|
|
if ((! $validation->[0]) && (! $validation->[1])) { |
541
|
|
|
|
|
|
|
return undef; |
542
|
|
|
|
|
|
|
} |
543
|
|
|
|
|
|
|
|
544
|
|
|
|
|
|
|
# |
545
|
|
|
|
|
|
|
|
546
|
|
|
|
|
|
|
if (! keys %{$args->{'scale'}}) { |
547
|
|
|
|
|
|
|
|
548
|
|
|
|
|
|
|
my $dest = ($args->{'overwrite'})? |
549
|
|
|
|
|
|
|
__PACKAGE__->converted_name([$self->{'__images'}{'source'}{'path'},$validation->[1]]) : |
550
|
|
|
|
|
|
|
"$self->{'__tmpdir'}/".&basename(__PACKAGE__->converted_name([$self->{'__images'}{'source'}{'path'}, |
551
|
|
|
|
|
|
|
$validation->[1]])); |
552
|
|
|
|
|
|
|
|
553
|
|
|
|
|
|
|
my ($x,$y) = $self->_shoehorn({source => $self->{'__images'}{'source'}{'path'}, |
554
|
|
|
|
|
|
|
dest => $dest, |
555
|
|
|
|
|
|
|
type => $validation->[1]}); |
556
|
|
|
|
|
|
|
|
557
|
|
|
|
|
|
|
if (! $x) { |
558
|
|
|
|
|
|
|
return undef; |
559
|
|
|
|
|
|
|
} |
560
|
|
|
|
|
|
|
|
561
|
|
|
|
|
|
|
return {source=>$self->_ping($dest)}; |
562
|
|
|
|
|
|
|
} |
563
|
|
|
|
|
|
|
|
564
|
|
|
|
|
|
|
# |
565
|
|
|
|
|
|
|
|
566
|
|
|
|
|
|
|
foreach my $name (keys %{$args->{'scale'}}) { |
567
|
|
|
|
|
|
|
|
568
|
|
|
|
|
|
|
next if ($name eq "source"); |
569
|
|
|
|
|
|
|
|
570
|
|
|
|
|
|
|
if (! $self->_scale({ |
571
|
|
|
|
|
|
|
name => $name, |
572
|
|
|
|
|
|
|
scale => $args->{'scale'}->{$name}, |
573
|
|
|
|
|
|
|
type => $validation->[1], |
574
|
|
|
|
|
|
|
})) { |
575
|
|
|
|
|
|
|
return undef; |
576
|
|
|
|
|
|
|
} |
577
|
|
|
|
|
|
|
} |
578
|
|
|
|
|
|
|
|
579
|
|
|
|
|
|
|
map { shift; } @{$self->_magick()}; |
580
|
|
|
|
|
|
|
return $self->{'__images'}; |
581
|
|
|
|
|
|
|
} |
582
|
|
|
|
|
|
|
|
583
|
|
|
|
|
|
|
# =head2 $obj->_process(\%args) |
584
|
|
|
|
|
|
|
# |
585
|
|
|
|
|
|
|
# =cut |
586
|
|
|
|
|
|
|
|
587
|
|
|
|
|
|
|
sub _process { |
588
|
|
|
|
|
|
|
my $self = shift; |
589
|
|
|
|
|
|
|
my $args = shift; |
590
|
|
|
|
|
|
|
|
591
|
|
|
|
|
|
|
$self->{'__images'}{'source'} = $self->_ping($self->{'__source'}) || return 0; |
592
|
|
|
|
|
|
|
|
593
|
|
|
|
|
|
|
# |
594
|
|
|
|
|
|
|
|
595
|
|
|
|
|
|
|
my $validation = $self->_validate($args); |
596
|
|
|
|
|
|
|
|
597
|
|
|
|
|
|
|
if ((! $validation->[0]) && (! $validation->[1])) { |
598
|
|
|
|
|
|
|
return 0; |
599
|
|
|
|
|
|
|
} |
600
|
|
|
|
|
|
|
|
601
|
|
|
|
|
|
|
# |
602
|
|
|
|
|
|
|
|
603
|
|
|
|
|
|
|
if ((! $args->{'max_height'}) && (! $args->{'max_width'})) { |
604
|
|
|
|
|
|
|
return 1; |
605
|
|
|
|
|
|
|
} |
606
|
|
|
|
|
|
|
|
607
|
|
|
|
|
|
|
# |
608
|
|
|
|
|
|
|
|
609
|
|
|
|
|
|
|
my $geometry = undef; |
610
|
|
|
|
|
|
|
my $newtype = undef; |
611
|
|
|
|
|
|
|
|
612
|
|
|
|
|
|
|
# |
613
|
|
|
|
|
|
|
|
614
|
|
|
|
|
|
|
my ($x,$y) = __PACKAGE__->scaled_dimensions([ |
615
|
|
|
|
|
|
|
$self->{'__images'}{'source'}{'width'}, |
616
|
|
|
|
|
|
|
$self->{'__images'}{'source'}{'height'}, |
617
|
|
|
|
|
|
|
$args->{'max_width'}, |
618
|
|
|
|
|
|
|
$args->{'max_height'} |
619
|
|
|
|
|
|
|
]); |
620
|
|
|
|
|
|
|
|
621
|
|
|
|
|
|
|
unless (($x == $self->{'__images'}{'source'}{'width'}) && |
622
|
|
|
|
|
|
|
($y == $self->{'__images'}{'source'}{'height'})) { |
623
|
|
|
|
|
|
|
|
624
|
|
|
|
|
|
|
$geometry = join("x",$x,$y); |
625
|
|
|
|
|
|
|
} |
626
|
|
|
|
|
|
|
|
627
|
|
|
|
|
|
|
# |
628
|
|
|
|
|
|
|
|
629
|
|
|
|
|
|
|
$newtype = $validation->[1]; |
630
|
|
|
|
|
|
|
|
631
|
|
|
|
|
|
|
# |
632
|
|
|
|
|
|
|
|
633
|
|
|
|
|
|
|
if ((! $newtype) && (! $geometry)) { |
634
|
|
|
|
|
|
|
return 1; |
635
|
|
|
|
|
|
|
} |
636
|
|
|
|
|
|
|
|
637
|
|
|
|
|
|
|
if ($newtype) { |
638
|
|
|
|
|
|
|
$self->{'__dest'} =~ s/^(.*)\.($self->{'__images'}{'source'}{'type'})$/$1\.$newtype/; |
639
|
|
|
|
|
|
|
} |
640
|
|
|
|
|
|
|
|
641
|
|
|
|
|
|
|
# |
642
|
|
|
|
|
|
|
|
643
|
|
|
|
|
|
|
$self->_shoehorn({ |
644
|
|
|
|
|
|
|
geometry => $geometry, |
645
|
|
|
|
|
|
|
type => $newtype |
646
|
|
|
|
|
|
|
}); |
647
|
|
|
|
|
|
|
|
648
|
|
|
|
|
|
|
if (! $x) { return 0; } |
649
|
|
|
|
|
|
|
|
650
|
|
|
|
|
|
|
# |
651
|
|
|
|
|
|
|
|
652
|
|
|
|
|
|
|
if ($newtype) { |
653
|
|
|
|
|
|
|
$self->{'__images'}{'source'} = $self->_ping($self->{'__dest'}); |
654
|
|
|
|
|
|
|
} |
655
|
|
|
|
|
|
|
|
656
|
|
|
|
|
|
|
else { |
657
|
|
|
|
|
|
|
$self->{'__images'}{'source'}{'height'} = $y; |
658
|
|
|
|
|
|
|
$self->{'__images'}{'source'}{'width'} = $x; |
659
|
|
|
|
|
|
|
} |
660
|
|
|
|
|
|
|
|
661
|
|
|
|
|
|
|
return 1; |
662
|
|
|
|
|
|
|
} |
663
|
|
|
|
|
|
|
|
664
|
|
|
|
|
|
|
# =head2 $obj->_validate(\@valid) |
665
|
|
|
|
|
|
|
# |
666
|
|
|
|
|
|
|
# Returns an array ref containing a boolean (is valid type) and a possible |
667
|
|
|
|
|
|
|
# type for conversion |
668
|
|
|
|
|
|
|
# |
669
|
|
|
|
|
|
|
# =cut |
670
|
|
|
|
|
|
|
|
671
|
|
|
|
|
|
|
sub _validate { |
672
|
|
|
|
|
|
|
my $self = shift; |
673
|
|
|
|
|
|
|
my $args = shift; |
674
|
|
|
|
|
|
|
|
675
|
|
|
|
|
|
|
if (exists($self->{'__validation'})) { return $self->{'__validation'}; } |
676
|
|
|
|
|
|
|
|
677
|
|
|
|
|
|
|
unless (ref($args->{'valid'}) eq "ARRAY") { |
678
|
|
|
|
|
|
|
$self->{'__validation'} = [1]; |
679
|
|
|
|
|
|
|
return $self->{'__validation'}; |
680
|
|
|
|
|
|
|
} |
681
|
|
|
|
|
|
|
|
682
|
|
|
|
|
|
|
if (grep /^($self->{'__images'}{'source'}{'type'})$/,@{$args->{'valid'}}) { |
683
|
|
|
|
|
|
|
$self->{'__validation'} = [1]; |
684
|
|
|
|
|
|
|
return $self->{'__validation'}; |
685
|
|
|
|
|
|
|
} |
686
|
|
|
|
|
|
|
|
687
|
|
|
|
|
|
|
foreach my $type (@{$args->{'valid'}}) { |
688
|
|
|
|
|
|
|
my $encode = ($self->_magick()->QueryFormat(format=>$type))[4]; |
689
|
|
|
|
|
|
|
|
690
|
|
|
|
|
|
|
if ($encode) { |
691
|
|
|
|
|
|
|
$self->{'__validation'} = [1,$type]; |
692
|
|
|
|
|
|
|
return $self->{'__validation'}; |
693
|
|
|
|
|
|
|
} |
694
|
|
|
|
|
|
|
} |
695
|
|
|
|
|
|
|
|
696
|
|
|
|
|
|
|
$self->{'__validation'} = [0]; |
697
|
|
|
|
|
|
|
return $self->{'__validation'}; |
698
|
|
|
|
|
|
|
} |
699
|
|
|
|
|
|
|
|
700
|
|
|
|
|
|
|
# =head2 $obj->_scale($name,$scale) |
701
|
|
|
|
|
|
|
# |
702
|
|
|
|
|
|
|
# =cut |
703
|
|
|
|
|
|
|
|
704
|
|
|
|
|
|
|
sub _scale { |
705
|
|
|
|
|
|
|
my $self = shift; |
706
|
|
|
|
|
|
|
my $args = shift; |
707
|
|
|
|
|
|
|
|
708
|
|
|
|
|
|
|
my $scaled = __PACKAGE__->scaled_name([$self->{'__dest'}, |
709
|
|
|
|
|
|
|
$args->{'name'}]); |
710
|
|
|
|
|
|
|
|
711
|
|
|
|
|
|
|
$scaled = "$self->{'__tmpdir'}/$scaled"; |
712
|
|
|
|
|
|
|
|
713
|
|
|
|
|
|
|
if ($args->{'type'}) { |
714
|
|
|
|
|
|
|
$scaled = __PACKAGE__->converted_name([$scaled,$args->{'type'}]); |
715
|
|
|
|
|
|
|
} |
716
|
|
|
|
|
|
|
|
717
|
|
|
|
|
|
|
my ($width,$height) = __PACKAGE__->dimensions_for_scale( |
718
|
|
|
|
|
|
|
$self->{'__images'}{'source'}->{'width'}, |
719
|
|
|
|
|
|
|
$self->{'__images'}{'source'}->{'height'}, |
720
|
|
|
|
|
|
|
$args->{'scale'}, |
721
|
|
|
|
|
|
|
); |
722
|
|
|
|
|
|
|
|
723
|
|
|
|
|
|
|
if ((! $width) || (! $height)) { |
724
|
|
|
|
|
|
|
$self->last_error("Unable to determine dimensions for '$args->{scale}'"); |
725
|
|
|
|
|
|
|
return 0; |
726
|
|
|
|
|
|
|
} |
727
|
|
|
|
|
|
|
|
728
|
|
|
|
|
|
|
my ($x,$y) = $self->_shoehorn({ |
729
|
|
|
|
|
|
|
source => $self->{'__images'}{'source'}{'path'}, |
730
|
|
|
|
|
|
|
dest => $scaled, |
731
|
|
|
|
|
|
|
geometry => join("x",$width,$height), |
732
|
|
|
|
|
|
|
type => $args->{'type'}, |
733
|
|
|
|
|
|
|
}); |
734
|
|
|
|
|
|
|
|
735
|
|
|
|
|
|
|
if (! $x) { return 0; } |
736
|
|
|
|
|
|
|
|
737
|
|
|
|
|
|
|
$self->{'__images'}{$args->{'name'}} = $self->_ping($scaled) || return 0; |
738
|
|
|
|
|
|
|
|
739
|
|
|
|
|
|
|
return 1 |
740
|
|
|
|
|
|
|
} |
741
|
|
|
|
|
|
|
|
742
|
|
|
|
|
|
|
# =head2 $obj->_shoehorn(\%args) |
743
|
|
|
|
|
|
|
# |
744
|
|
|
|
|
|
|
# =cut |
745
|
|
|
|
|
|
|
|
746
|
|
|
|
|
|
|
sub _shoehorn { |
747
|
|
|
|
|
|
|
my $self = shift; |
748
|
|
|
|
|
|
|
my $args = shift; |
749
|
|
|
|
|
|
|
|
750
|
|
|
|
|
|
|
$args->{'source'} ||= $self->{'__source'}; |
751
|
|
|
|
|
|
|
$args->{'dest'} ||= $self->{'__dest'}; |
752
|
|
|
|
|
|
|
|
753
|
|
|
|
|
|
|
# my $caller = (caller(1))[3]; |
754
|
|
|
|
|
|
|
# print STDERR "Shoehorn ($caller):\n".&Dumper($args); |
755
|
|
|
|
|
|
|
|
756
|
|
|
|
|
|
|
# |
757
|
|
|
|
|
|
|
|
758
|
|
|
|
|
|
|
$self->_read($args->{'source'}) || return 0; |
759
|
|
|
|
|
|
|
|
760
|
|
|
|
|
|
|
# |
761
|
|
|
|
|
|
|
|
762
|
|
|
|
|
|
|
if ($args->{'geometry'}) { |
763
|
|
|
|
|
|
|
|
764
|
|
|
|
|
|
|
if (my $err = $self->_magick()->Scale(geometry=>$args->{'geometry'})) { |
765
|
|
|
|
|
|
|
$self->last_error("Failed to scale $args->{'source'} : $err"); |
766
|
|
|
|
|
|
|
return 0; |
767
|
|
|
|
|
|
|
} |
768
|
|
|
|
|
|
|
|
769
|
|
|
|
|
|
|
} |
770
|
|
|
|
|
|
|
|
771
|
|
|
|
|
|
|
# |
772
|
|
|
|
|
|
|
|
773
|
|
|
|
|
|
|
if ($args->{'type'}) { |
774
|
|
|
|
|
|
|
$args->{'dest'} = "$args->{'type'}:$args->{'dest'}"; |
775
|
|
|
|
|
|
|
} |
776
|
|
|
|
|
|
|
|
777
|
|
|
|
|
|
|
if (my $err = $self->_magick()->[0]->Write($args->{'dest'})) { |
778
|
|
|
|
|
|
|
$self->last_error("Failed to write '$args->{'dest'}' : $@"); |
779
|
|
|
|
|
|
|
return 0; |
780
|
|
|
|
|
|
|
} |
781
|
|
|
|
|
|
|
|
782
|
|
|
|
|
|
|
# |
783
|
|
|
|
|
|
|
|
784
|
|
|
|
|
|
|
return ($self->_magick()->Get("width"),$self->_magick()->Get("height")); |
785
|
|
|
|
|
|
|
} |
786
|
|
|
|
|
|
|
|
787
|
|
|
|
|
|
|
# =head2 $obj->_read($file) |
788
|
|
|
|
|
|
|
# |
789
|
|
|
|
|
|
|
# =cut |
790
|
|
|
|
|
|
|
|
791
|
|
|
|
|
|
|
sub _read { |
792
|
|
|
|
|
|
|
my $self = shift; |
793
|
|
|
|
|
|
|
|
794
|
|
|
|
|
|
|
if (my $err = $self->_magick()->Read($_[0]."[0]")) { |
795
|
|
|
|
|
|
|
$self->last_error("Failed to ping '$_[0]' : $err"); |
796
|
|
|
|
|
|
|
return 0; |
797
|
|
|
|
|
|
|
} |
798
|
|
|
|
|
|
|
|
799
|
|
|
|
|
|
|
# Hack. There must be a better way... |
800
|
|
|
|
|
|
|
@{$self->{'__magick'}} = pop @{$self->{'__magick'}}; |
801
|
|
|
|
|
|
|
return 1; |
802
|
|
|
|
|
|
|
} |
803
|
|
|
|
|
|
|
|
804
|
|
|
|
|
|
|
# =head2 $obj->_ping($file) |
805
|
|
|
|
|
|
|
# |
806
|
|
|
|
|
|
|
# =cut |
807
|
|
|
|
|
|
|
|
808
|
|
|
|
|
|
|
sub _ping { |
809
|
|
|
|
|
|
|
my $self = shift; |
810
|
|
|
|
|
|
|
my $file = shift; |
811
|
|
|
|
|
|
|
|
812
|
|
|
|
|
|
|
$self->_read($file) || return 0; |
813
|
|
|
|
|
|
|
|
814
|
|
|
|
|
|
|
# Because $magick->Ping() is often unreliable |
815
|
|
|
|
|
|
|
# and fails to return height/width info. Dunno. |
816
|
|
|
|
|
|
|
|
817
|
|
|
|
|
|
|
$file =~ /^(.*)\.([^\.]+)$/; |
818
|
|
|
|
|
|
|
my $extension = $2; |
819
|
|
|
|
|
|
|
|
820
|
|
|
|
|
|
|
return { |
821
|
|
|
|
|
|
|
width => $self->_magick()->Get("width"), |
822
|
|
|
|
|
|
|
height => $self->_magick()->Get("height"), |
823
|
|
|
|
|
|
|
path => $file, |
824
|
|
|
|
|
|
|
format => $self->_magick()->Get("format"), |
825
|
|
|
|
|
|
|
type => $extension, |
826
|
|
|
|
|
|
|
extension => $extension, |
827
|
|
|
|
|
|
|
contenttype => $self->_mmagic()->checktype_filename($file), |
828
|
|
|
|
|
|
|
}; |
829
|
|
|
|
|
|
|
} |
830
|
|
|
|
|
|
|
|
831
|
|
|
|
|
|
|
# =head2 $obj->_cleanup() |
832
|
|
|
|
|
|
|
# |
833
|
|
|
|
|
|
|
# =cut |
834
|
|
|
|
|
|
|
|
835
|
|
|
|
|
|
|
sub _cleanup { |
836
|
|
|
|
|
|
|
my $self = shift; |
837
|
|
|
|
|
|
|
|
838
|
|
|
|
|
|
|
delete $self->{'__validation'}; |
839
|
|
|
|
|
|
|
|
840
|
|
|
|
|
|
|
if ($self->{'__images'}{'source'}{'path'} eq $self->{'__source'}) { |
841
|
|
|
|
|
|
|
delete $self->{'__images'}{'source'}; |
842
|
|
|
|
|
|
|
} |
843
|
|
|
|
|
|
|
|
844
|
|
|
|
|
|
|
if (ref($self->{'__instancecleanup'}) eq "CODE") { |
845
|
|
|
|
|
|
|
my $result = &{ $self->{'__instancecleanup'} }($self->{'__images'}); |
846
|
|
|
|
|
|
|
|
847
|
|
|
|
|
|
|
delete $self->{'__instancecleanup'}; |
848
|
|
|
|
|
|
|
return $result; |
849
|
|
|
|
|
|
|
} |
850
|
|
|
|
|
|
|
|
851
|
|
|
|
|
|
|
if (ref($self->{'__cleanup'}) eq "CODE") { |
852
|
|
|
|
|
|
|
return &{ $self->{'__cleanup'} }($self->{'__images'}); |
853
|
|
|
|
|
|
|
} |
854
|
|
|
|
|
|
|
|
855
|
|
|
|
|
|
|
foreach my $name (keys %{$self->{'__images'}}) { |
856
|
|
|
|
|
|
|
my $file = $self->{'__images'}->{$name}->{'path'}; |
857
|
|
|
|
|
|
|
if (-f $file ) { unlink $file; } |
858
|
|
|
|
|
|
|
} |
859
|
|
|
|
|
|
|
|
860
|
|
|
|
|
|
|
return 1; |
861
|
|
|
|
|
|
|
} |
862
|
|
|
|
|
|
|
|
863
|
|
|
|
|
|
|
# =head2 $obj->_mmagic() |
864
|
|
|
|
|
|
|
# |
865
|
|
|
|
|
|
|
# Returns a File::MMagic object |
866
|
|
|
|
|
|
|
# |
867
|
|
|
|
|
|
|
# -cut |
868
|
|
|
|
|
|
|
|
869
|
|
|
|
|
|
|
sub _mmagic { |
870
|
|
|
|
|
|
|
my $self = shift; |
871
|
|
|
|
|
|
|
|
872
|
|
|
|
|
|
|
if (ref($self->{'__mmagic'}) ne "File::MMagic") { |
873
|
|
|
|
|
|
|
$self->{'__mmagic'} = File::MMagic->new(); |
874
|
|
|
|
|
|
|
} |
875
|
|
|
|
|
|
|
|
876
|
|
|
|
|
|
|
return $self->{'__mmagic'}; |
877
|
|
|
|
|
|
|
} |
878
|
|
|
|
|
|
|
|
879
|
|
|
|
|
|
|
# =head2 $obj->_magick() |
880
|
|
|
|
|
|
|
# |
881
|
|
|
|
|
|
|
# =cut |
882
|
|
|
|
|
|
|
|
883
|
|
|
|
|
|
|
sub _magick { |
884
|
|
|
|
|
|
|
my $self = shift; |
885
|
|
|
|
|
|
|
|
886
|
|
|
|
|
|
|
if (ref($self->{'__magick'}) ne "Image::Magick") { |
887
|
|
|
|
|
|
|
$self->{'__magick'} = Image::Magick->new(); |
888
|
|
|
|
|
|
|
} |
889
|
|
|
|
|
|
|
|
890
|
|
|
|
|
|
|
return $self->{'__magick'}; |
891
|
|
|
|
|
|
|
} |
892
|
|
|
|
|
|
|
|
893
|
|
|
|
|
|
|
# =head2 $obj->DESTROY() |
894
|
|
|
|
|
|
|
# |
895
|
|
|
|
|
|
|
# =cut |
896
|
|
|
|
|
|
|
|
897
|
|
|
|
|
|
|
sub DESTROY { |
898
|
|
|
|
|
|
|
my $self = shift; |
899
|
|
|
|
|
|
|
$self->_cleanup(); |
900
|
|
|
|
|
|
|
return 1; |
901
|
|
|
|
|
|
|
} |
902
|
|
|
|
|
|
|
|
903
|
|
|
|
|
|
|
=head1 VERSION |
904
|
|
|
|
|
|
|
|
905
|
|
|
|
|
|
|
1.42 |
906
|
|
|
|
|
|
|
|
907
|
|
|
|
|
|
|
=head1 DATE |
908
|
|
|
|
|
|
|
|
909
|
|
|
|
|
|
|
$Date: 2003/05/30 22:51:06 $ |
910
|
|
|
|
|
|
|
|
911
|
|
|
|
|
|
|
=head1 AUTHOR |
912
|
|
|
|
|
|
|
|
913
|
|
|
|
|
|
|
Aaron Straup Cope |
914
|
|
|
|
|
|
|
|
915
|
|
|
|
|
|
|
=head1 TO DO |
916
|
|
|
|
|
|
|
|
917
|
|
|
|
|
|
|
=over 4 |
918
|
|
|
|
|
|
|
|
919
|
|
|
|
|
|
|
=item * |
920
|
|
|
|
|
|
|
|
921
|
|
|
|
|
|
|
Modify constructor to accept all the options defined in the I |
922
|
|
|
|
|
|
|
method as defaults. |
923
|
|
|
|
|
|
|
|
924
|
|
|
|
|
|
|
=item * |
925
|
|
|
|
|
|
|
|
926
|
|
|
|
|
|
|
Modify I to accept multiple files. |
927
|
|
|
|
|
|
|
|
928
|
|
|
|
|
|
|
=item * |
929
|
|
|
|
|
|
|
|
930
|
|
|
|
|
|
|
Modify I to accept strings and filehandles. |
931
|
|
|
|
|
|
|
|
932
|
|
|
|
|
|
|
=back |
933
|
|
|
|
|
|
|
|
934
|
|
|
|
|
|
|
=head1 SEE ALSO |
935
|
|
|
|
|
|
|
|
936
|
|
|
|
|
|
|
L |
937
|
|
|
|
|
|
|
|
938
|
|
|
|
|
|
|
L |
939
|
|
|
|
|
|
|
|
940
|
|
|
|
|
|
|
=head1 LICENSE |
941
|
|
|
|
|
|
|
|
942
|
|
|
|
|
|
|
Copyright (c) 2001-2003, Aaron Straup Cope. All Rights Reserved. |
943
|
|
|
|
|
|
|
|
944
|
|
|
|
|
|
|
This is free software, you may use it and distribute it under the same |
945
|
|
|
|
|
|
|
terms as Perl itself. |
946
|
|
|
|
|
|
|
|
947
|
|
|
|
|
|
|
=cut |
948
|
|
|
|
|
|
|
|
949
|
|
|
|
|
|
|
return 1; |
950
|
|
|
|
|
|
|
|
951
|
|
|
|
|
|
|
} |