img: Don't generate new verison of image if it is scaled to be larger in either dimen...

[git.ikiwiki.info.git] / IkiWiki / Plugin / img.pm

diff --git a/IkiWiki/Plugin/img.pm b/IkiWiki/Plugin/img.pm
index cc0e84b01f09a7527c341a99c8262eeebb34d106..e99c9b8690bac037b9ad4447f830b707757652b0 100644 (file)
--- a/IkiWiki/Plugin/img.pm
+++ b/IkiWiki/Plugin/img.pm
@@ -51,6 +51,8 @@ sub preprocess (@) { #{{{
        my $imglink;
        my $r;
 
+       my ($dwidth, $dheight);
+
        if ($params{size} ne 'full') {
                my ($w, $h) = ($params{size} =~ /^(\d+)x(\d+)$/);
                return "[[img ".sprintf(gettext('bad size "%s"'), $params{size})."]]"
@@ -69,7 +71,15 @@ sub preprocess (@) { #{{{
                        $r = $im->Read(srcfile($file));
                        return "[[img ".sprintf(gettext("failed to read %s: %s"), $file, $r)."]]" if $r;
 
-                       $r = $im->Resize(geometry => "${w}x${h}");
+                       # don't resize any larger
+                       my ($rw, $rh) = ($w, $h);
+                       if ($rw > $im->Get("width") ||
+                           $rh > $im->Get("height")) {
+                               $rw=$im->Get("width");
+                               $rh=$im->Get("height");
+                       }
+
+                       $r = $im->Resize(geometry => "${rw}x${rh}");
                        return "[[img ".sprintf(gettext("failed to resize: %s"), $r)."]]" if $r;
 
                        # don't actually write file in preview mode
@@ -81,11 +91,17 @@ sub preprocess (@) { #{{{
                                $imglink = $file;
                        }
                }
+
+               # since we don't really resize larger, set the display
+               # size, so the browser can scale the image up if necessary
+               ($dwidth, $dheight)=($w, $h);
        }
        else {
                $r = $im->Read(srcfile($file));
                return "[[img ".sprintf(gettext("failed to read %s: %s"), $file, $r)."]]" if $r;
                $imglink = $file;
+               $dwidth = $im->Get("width");
+               $dheight = $im->Get("height");
        }
 
        add_depends($imglink, $params{page});
@@ -106,8 +122,8 @@ sub preprocess (@) { #{{{
 
        my $imgtag='<img src="'.$imgurl.
                '" alt="'.(exists $params{alt} ? $params{alt} : '').
-               '" width="'.$im->Get("width").
-               '" height="'.$im->Get("height").'"'.
+               '" width="'.$dwidth.
+               '" height="'.$dheight.'"'.
                (exists $params{title} ? ' title="'.$params{title}.'"' : '').
                (exists $params{class} ? ' class="'.$params{class}.'"' : '').
                (exists $params{id} ? ' id="'.$params{id}.'"' : '').