Add NetBSD-style 2-clause BSD license.

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

diff --git a/IkiWiki/Plugin/img.pm b/IkiWiki/Plugin/img.pm
index 78e3789171c53a5e90110f666e08ef0860bd36f7..9ae85c4e682839d7a2179785e1c4e504d6ecc866 100644 (file)
--- a/IkiWiki/Plugin/img.pm
+++ b/IkiWiki/Plugin/img.pm
@@ -44,6 +44,7 @@ sub preprocess (@) {
        }
 
        add_link($params{page}, $image);
+
        # optimisation: detect scan mode, and avoid generating the image
        if (! defined wantarray) {
                return;
@@ -64,9 +65,13 @@ sub preprocess (@) {
        my $imglink;
        my $r;
 
+       my ($dwidth, $dheight);
+
        if ($params{size} ne 'full') {
+               add_depends($params{page}, $image);
+
                my ($w, $h) = ($params{size} =~ /^(\d*)x(\d*)$/);
-               error sprintf(gettext('bad size "%s"'), $params{size})
+               error sprintf(gettext('wrong size format "%s" (should be WxH)'), $params{size})
                        unless (defined $w && defined $h &&
                                (length $w || length $h));
 
@@ -83,7 +88,15 @@ sub preprocess (@) {
                        $r = $im->Read($srcfile);
                        error 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 ((length $rw && $rw > $im->Get("width")) ||
+                           (length $rh && $rh > $im->Get("height"))) {
+                               $rw=$im->Get("width");
+                               $rh=$im->Get("height");
+                       }
+
+                       $r = $im->Resize(geometry => "${rw}x${rh}");
                        error sprintf(gettext("failed to resize: %s"), $r) if $r;
 
                        # don't actually write file in preview mode
@@ -95,15 +108,36 @@ 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
+               if (length $w && length $h) {
+                       ($dwidth, $dheight)=($w, $h);
+               }
+               # avoid division by zero on 0x0 image
+               elsif ($im->Get("width") == 0 || $im->Get("height") == 0) {
+                       ($dwidth, $dheight)=(0, 0);
+               }
+               # calculate unspecified size from the other one, preserving
+               # aspect ratio
+               elsif (length $w) {
+                       $dwidth=$w;
+                       $dheight=$w / $im->Get("width") * $im->Get("height");
+               }
+               elsif (length $h) {
+                       $dheight=$h;
+                       $dwidth=$h / $im->Get("height") * $im->Get("width");
+               }
+
        }
        else {
                $r = $im->Read($srcfile);
                error sprintf(gettext("failed to read %s: %s"), $file, $r) if $r;
                $imglink = $file;
+               $dwidth = $im->Get("width");
+               $dheight = $im->Get("height");
        }
 
-       add_depends($imglink, $params{page});
-
        my ($fileurl, $imgurl);
        if (! $params{preview}) {
                $fileurl=urlto($file, $params{destpage});
@@ -119,8 +153,8 @@ sub preprocess (@) {
        }
 
        my $imgtag='<img src="'.$imgurl.
-               '" width="'.$im->Get("width").
-               '" height="'.$im->Get("height").'"'.
+               '" width="'.$dwidth.
+               '" height="'.$dheight.'"'.
                (exists $params{alt} ? ' alt="'.$params{alt}.'"' : '').
                (exists $params{title} ? ' title="'.$params{title}.'"' : '').
                (exists $params{align} ? ' align="'.$params{align}.'"' : '').
@@ -134,11 +168,15 @@ sub preprocess (@) {
        elsif ($params{link} =~ /^\w+:\/\//) {
                $imgtag='<a href="'.$params{link}.'">'.$imgtag.'</a>';
        }
-       elsif (length bestlink($params{page}, $params{link})) {
-               add_depends($params{page}, $params{link});
-               $imgtag=htmllink($params{page}, $params{destpage},
-                       $params{link}, linktext => $imgtag,
-                       noimageinline => 1);
+       else {
+               my $b = bestlink($params{page}, $params{link});
+       
+               if (length $b) {
+                       add_depends($params{page}, $b);
+                       $imgtag=htmllink($params{page}, $params{destpage},
+                               $params{link}, linktext => $imgtag,
+                               noimageinline => 1);
+               }
        }
 
        if (exists $params{caption}) {