- my $thumbpath = $wordcol{thumb}->{-src}->($row);
- if (-e $imgpath) {
- my $xyres = $row->{cover} ? '600x400' : '300x200';
- my @cmds = @{ $row->{thumb} // [] };
- if (my ($cmdarg) = grep { $cmds[$_] eq '-area' } 0 .. $#cmds) {
- # replace option by permillage crop
- my @dim = map { $_ / 1000 } split /\D/, $cmds[$cmdarg + 1];
- splice @cmds, $cmdarg, 2, (
- -set => 'option:distort:viewport' => sprintf(
- '%%[fx:w*%s]x%%[fx:h*%s]+%%[fx:w*%s]+%%[fx:h*%s]',
- ($dim[2] || 1) - $dim[0], # width = x2 - x1
- ($dim[3] || 1) - $dim[1], # height = y2 - y1
- @dim[0, 1] # offset = x1,y1
- ),
- -distort => SRT => 0, # noop transform to apply viewport
- );
- }
- @cmds = (
- 'convert',
- $imgpath,
- -delete => '1--1', -background => 'white',
- -gravity => defined $row->{thumb} ? 'northwest' : 'center',
- @cmds,
- -resize => "$xyres^", -extent => $xyres,
- '-strip', -quality => '60%', -interlace => 'plane',
- $thumbpath
- );
- eval {
- require IPC::Run;
- my $output;
- IPC::Run::run(\@cmds, '<' => \undef, '>&' => \$output)
- or die $output ||
- ($? & 127 ? "signal $?" : "error code ".($? >> 8))."\n";
- } or Alert([
- "Thumbnail image not generated",
- "Failed to convert source image.",
- ], "@cmds\n$@");
- }
- else {
- unlink $thumbpath;
- }