SVG streams without xml, DOCTYPE headers aren't supported

[makepanic]

sharp streams currently only support svg images with the xml + DOCTYPE headers `

`

Is it possible to add svg support for streams that omit these headers and only use the <svg> element?

Example:
wikimedia-with-header.svg

<?xml version="1.0" standalone="yes"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100">
  <path d="M19,16a46,46 0,1,0 62,0l-8,8a34,34 0,1,1-46,0z" fill="#069"/>
  <path d="M46,43v35a28,28 0,0,1-14-49zM54,43v35a28,28 0,0,0 14-49z" fill="#396"/>
  <circle r="15" cx="50" cy="18" fill="#900"/>
</svg>

wikimedia-without-header.svg

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100">
  <path d="M19,16a46,46 0,1,0 62,0l-8,8a34,34 0,1,1-46,0z" fill="#069"/>
  <path d="M46,43v35a28,28 0,0,1-14-49zM54,43v35a28,28 0,0,0 14-49z" fill="#396"/>
  <circle r="15" cx="50" cy="18" fill="#900"/>
</svg>

Sample code to reproduce:

var fs = require('fs'),
    path = require('path'),
    sharp = require('sharp');

var WITH_HEADER = path.join(__dirname, 'wikimedia-with-header.svg'),
    WITHOUT_HEADER = path.join(__dirname, 'wikimedia-without-header.svg');

var withheaderStream = fs.createReadStream(WITH_HEADER),
    withoutHeaderStream = fs.createReadStream(WITHOUT_HEADER);

function buildConvertPipe() {
    return sharp().rotate()
        .background('white').flatten()
        .toFormat('jpeg')
        .resize(200, 200)
        .min()
        .crop(sharp.gravity.center)
}

var withHeaderPipe = withheaderStream
    .pipe(buildConvertPipe());
withHeaderPipe.on('error', function () {
    console.log('with header stream failed.');
});
withHeaderPipe.pipe(fs.createWriteStream(WITH_HEADER + '.with-header.jpeg'));


var withoutHeaderPipe = withoutHeaderStream
    .pipe(buildConvertPipe());

withoutHeaderPipe.on('error', function () {
    console.log('without header stream failed.');
});
withoutHeaderPipe.pipe(fs.createWriteStream(WITH_HEADER + '.without-header.jpeg'));

which produces

probably related to #197

[lovell]

Hello, this looks like a limitation of ImageMagick's built-in SVG parser, as (optionally) used by libvips to handle SVGs.

You'll probably have more success if you use libvips compiled against GraphicsMagick.

The pre-compiled binaries provided by sharp will be switching to GraphicsMagick for Linux users from the next release. If you're using Linux, are you able to try using the master branch via npm install lovell/sharp?

[makepanic]

I tried to run it in a ubuntu docker instance that uses the current preinstall.sh script (+ gm and imagemagick from source) and npm installes lovell/sharp. It's still failing for the svg without xml header. (getting segfaults on local arch, which are probably unrelated)

Is there something else i could try or do i have to specify some build flags to build libvips against gm?

[lovell]

As of sharp v0.12.0, the preinstall script is no longer required for most flavours of Linux, including Ubuntu 12.04+

Are you able to try installing from the master branch without?

[lovell]

@makepanic v0.13.0 is out now - have you been able to make any progress with this?

[lovell]

Closing as I assume v0.13.x has solved this problem. Feel free to reopen if this is not the case.