| 1 |
package Frey::Web::CombineImages; |
| 2 |
use Moose::Role; |
| 3 |
|
| 4 |
with 'Frey::Path'; |
| 5 |
with 'Frey::Storage'; |
| 6 |
|
| 7 |
use Imager; |
| 8 |
use Digest::MD5 qw/md5_hex/; |
| 9 |
use File::Slurp; |
| 10 |
use Data::Dump qw/dump/; |
| 11 |
|
| 12 |
=head2 combine_images |
| 13 |
|
| 14 |
Combine images into CSS sprites based on L<http://www.alistapart.com/articles/sprites/> |
| 15 |
|
| 16 |
my ( $combined_path, $styles ) = $self->combine_images( @paths ); |
| 17 |
|
| 18 |
=cut |
| 19 |
|
| 20 |
sub combine_images { |
| 21 |
my $self = shift; |
| 22 |
my @images = @_; |
| 23 |
|
| 24 |
my $path = 'var/combine/' . md5_hex( join(' ',@images ) ); |
| 25 |
my $style_path = $path . '.yaml'; |
| 26 |
$path .= '.png'; |
| 27 |
|
| 28 |
return ( $path, $self->load( $style_path ) ) if -e $path; |
| 29 |
|
| 30 |
warn "# path $path"; |
| 31 |
$self->mkbasepath( $path ); |
| 32 |
|
| 33 |
# fixed dimensions of images combined |
| 34 |
my ( $w, $h ) = ( 16, 16 ); |
| 35 |
my $padding = 5; # space between pictures when used within text |
| 36 |
my $num_images = $#images + 1; |
| 37 |
|
| 38 |
return unless $num_images; |
| 39 |
|
| 40 |
my $combined = Imager->new( |
| 41 |
xsize => $w, |
| 42 |
ysize => $num_images * ( $h + $padding ), |
| 43 |
channels => 4, # RGB+alpha |
| 44 |
) || die "can't create $w x ",$num_images * ($h + $padding)," combined image"; |
| 45 |
|
| 46 |
my $y = 0; |
| 47 |
|
| 48 |
my $style; |
| 49 |
|
| 50 |
foreach my $image_path ( @images ) { |
| 51 |
my $i = Imager->new; |
| 52 |
$i->read( file => $image_path ) || die "can't open $image_path: $!"; |
| 53 |
|
| 54 |
die "with not $w" unless $i->getwidth == $w; |
| 55 |
die "with not $h" unless $i->getheight == $h; |
| 56 |
|
| 57 |
warn "# copy $image_path 0 x $y" if $self->debug; |
| 58 |
$combined->paste( img => $i, left => 0, top => $y ); |
| 59 |
|
| 60 |
$style->{$image_path} |
| 61 |
= qq|<span style="| |
| 62 |
. qq|background: url(/$path) no-repeat 0px | . -$y . qq|px; | |
| 63 |
. qq|padding: 0 0 0 | . ( $w + 3 ) . qq|px; | |
| 64 |
. qq|width: ${w}px; height: ${h}px; | |
| 65 |
. qq|"> </span>|; |
| 66 |
; |
| 67 |
|
| 68 |
$y += $h + $padding; |
| 69 |
} |
| 70 |
|
| 71 |
$combined->write( file => $path ) || die "can't write $path: $!"; |
| 72 |
$self->store( $style_path, $style ) || die "can't store $style_path: $!"; |
| 73 |
warn |
| 74 |
"# combined $num_images ${w}x${h} images into ", |
| 75 |
$combined->getwidth, "x", $combined->getheight, " ", |
| 76 |
$path, " ", -s $path , " bytes ", |
| 77 |
" style $style_path ", -s $style_path, " bytes"; |
| 78 |
|
| 79 |
return ( $path, $style ); |
| 80 |
} |
| 81 |
|
| 82 |
no Moose::Role; |
| 83 |
|
| 84 |
1; |
Parent Directory
| 
Revision Log