mason/dhandler (.image), static/tgal.css: Adaptive view scaling.

[tgal] / mason / dhandler

diff --git a/mason/dhandler b/mason/dhandler
index 4676769..0c834b9 100755 (executable)
--- a/mason/dhandler
+++ b/mason/dhandler
@@ -222,16 +222,26 @@ Failed to find &lsquo;<% $path |h %>&rsquo;.
        my $urldir = join_paths $SCRIPTURL, $dir;
        my ($dd, $ff, $ii) = listdir $realdir;
        my @thumbsz = qw{smallthumb medthumb bigthumb};
+       my @imgsz = sort { $SIZE{$a} <=> $SIZE{$b} } keys %SIZE;
+       my ($wd, $ht, $max);
        my %tn;
-       my $vw;
+       my %vw;
 
        my $fi = undef;
        FILE: for (my $i = 0; $i < @$ff; $i++) {
          my $f = $ff->[$i];
          my $img = TrivGal::Image->new(join_paths $dir, $f->name);
          for my $sz (@thumbsz) { $tn{$f->name}{$sz} = $img->scale($sz); }
-         if ($ff->[$i]->name eq "$base$ext")
-           { $fi = $i; $vw = $img->scale("medium"); }
+         if ($ff->[$i]->name eq "$base$ext") {
+           $fi = $i;
+           ($wd, $ht) = ($img->wd, $img->ht);
+           $max = $img->sz;
+           SIZE: for my $sc (@imgsz) {
+             my $sz = $SIZE{$sc};
+             last SIZE if $max < $sz;
+             $vw{$sc} = $img->scale($sc);
+           }
+         }
        }
        defined $fi or die "image not found in its folder?";
        my $this = $ff->[$fi];
@@ -270,7 +280,19 @@ Failed to find &lsquo;<% $path |h %>&rsquo;.
   <div class=prev><a class=prev href="<% "$pre/$link{prev}" |hu %>">&lsaquo;</a></div>
 % }
   <a class=view href="<% $url |h %>">
-    <img src="<% $vw |h %>">
+    <picture>
+% my ($hoff, $voff) = (60, 480);
+% SIZE: for (my $i = 0; $i < @imgsz; $i++) {
+%   my $scale = $imgsz[$i];
+%   last SIZE unless exists $vw{$scale};
+%   my $scsz = $SIZE{$scale};
+%   my $f = $scsz/$max;
+%   my ($thiswd, $thisht) = map int, ($f*$wd + $hoff, $f*$ht + $voff);
+      <source srcset="<% $vw{$scale} |h %>"
+             media="(max-width: <% $thiswd %>px) or (max-height: <% $thisht %>px)">
+% }
+      <img src="<% "$IMGURL/$path" |hu %>">
+    </picture>
   </a>
 % if ($link{next}) {
   <div class=next><a class=next href="<% "$pre/$link{next}" |hu %>">&rsaquo;</a></div>