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show resized img in preview using data: urls 

in analogy to sparklines, this renders scaled imgs to
data:img/...;base64,... urls in preview mode.

if the image is already present on the server (eg because it was not
just inserted), the already rendered image is referenced instead.
master
chrysn 2014-07-15 11:57:57 +02:00
parent a308b212ad
commit fa2a4d0db4
1 changed files with 9 additions and 11 deletions
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20
IkiWiki/Plugin/img.pm
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@ -75,6 +75,7 @@ sub preprocess (@) {
error gettext("Image::Magick is not installed") if $@;
my $im = Image::Magick->new();
my $imglink;
my $imgdatalink;
my $r = $im->Read("$srcfile\[$pagenumber]");
error sprintf(gettext("failed to read %s: %s"), $file, $r) if $r;
@ -123,15 +124,17 @@ sub preprocess (@) {
$r = $im->Resize(geometry => "${dwidth}x${dheight}");
error sprintf(gettext("failed to resize: %s"), $r) if $r;
$im->set(($issvg || $ispdf) ? (magick => 'png') : ());
my @blob = $im->ImageToBlob();
# don't actually write resized file in preview mode;
# rely on width and height settings
if (! $params{preview}) {
$im->set(($issvg || $ispdf) ? (magick => 'png') : ());
my @blob = $im->ImageToBlob();
writefile($imglink, $config{destdir}, $blob[0], 1);
}
else {
$imglink = $file;
eval q{use MIME::Base64};
error($@) if $@;
$imgdatalink = "data:image/".$im->Get("magick").";base64,".encode_base64($blob[0]);
}
}
@ -148,14 +151,9 @@ sub preprocess (@) {
}
my ($fileurl, $imgurl);
if (! $params{preview}) {
$fileurl=urlto($file, $params{destpage});
$imgurl=urlto($imglink, $params{destpage});
}
else {
$fileurl=urlto($file);
$imgurl=urlto($imglink);
}
my $urltobase = $params{preview} ? undef : $params{destpage};
$fileurl=urlto($file, $urltobase);
$imgurl=$imgdatalink ? $imgdatalink : urlto($imglink, $urltobase);
if (! exists $params{class}) {
$params{class}="img";