word/edit: experimental thumb crop calculations

Determine dimensions before imagemagick to try out different formulas.

diff --git a/Shiar_Sheet/ImagePrep.pm b/Shiar_Sheet/ImagePrep.pm
index 0c7489b54cd1346fd4b6c92118e60034a57c3420..6457a83a0c08071fbbf7daa185db8403ee600f57 100644 (file)
--- a/Shiar_Sheet/ImagePrep.pm
+++ b/Shiar_Sheet/ImagePrep.pm
@@ -23,13 +23,25 @@ sub download {
                or die "Download from <q>$download</q> failed: ".$status->status_line."\n";
 }
 
+sub dimensions {
+       my ($imgpath) = @_;
+       require IPC::Run;
+       IPC::Run::run(
+               [identify => -format => '%w %h', $$imgpath],
+               '<' => \undef, '>&' => \my $xy
+       ) or die ["Image dimensions could not be determined.", $$imgpath];
+       return split /\s/, $xy, 3;
+}
+
 sub convert {
        my ($imgpath, $thumbpath, $cmds) = @_;
        if (not -e $$imgpath) {
                return !-e $thumbpath || unlink $thumbpath;
        }
 
+       #my ($w, $h) = $imgpath->dimensions;
        my $xyres = 0 ? '600x400' : '300x200'; # cover
+       my $aspect = 3/2;
        my @cmds = @{ $cmds // [] };
        if (my ($cmdarg) = grep { $cmds[$_] eq '-area' } 0 .. $#cmds) {
                # replace option by permillage crop
@@ -37,9 +49,13 @@ sub convert {
                $dim[$_] ||= 1 for 2, 3; # optional end
                push @dim, $dim[2 + $_] - $dim[$_] for 0, 1; # add width, height
                splice @cmds, $cmdarg, 2, (
+                       #crop="%[fx:floor(w*$ratio)]x%[fx:floor(h*$ratio)]"
+                       #crop="$crop+%[fx:ceil((w-w*$ratio)/2)]+%[fx:ceil((h-h*$ratio)/2)]"
                        -set => 'option:distort:viewport' => sprintf(
                                '%%[fx:%s]x%%[fx:%s]+%%[fx:%s]+%%[fx:%s]',
                                "w*$dim[4]", "h*$dim[5]", # width x height
+                               #"max(w*$dim[4], h*$dim[5]*$aspect)", # width
+                               #"max(h*$dim[5], w*$dim[4]/$aspect)", # height
                                "w*$dim[0]", "h*$dim[1]", # x+y offset
                        ),
                        -distort => SRT => 0, # noop transform to apply viewport