I am search a way in nodejs to convert an svg to png with the help of imagemagick https://github.com/rsms/node-imagemagick, without storing the resulting png in a temp file on the local filesystem.
Unfortunately, I am unable to do this. And I didn't find example in the internet. Can someone give me an example?
var im = require('imagemagick');
var fs = require('fs');
im.convert(['foo.svg', 'png:-'],
function(err, stdout){
if (err) throw err;
//stdout is your image
//just write it to file to test this:
fs.writeFileSync('test.png', stdout,'binary');
});
It just throws the 'raw' arguments to the command line convert, so for any more questions, just look at convert's docs.
oI found what I am looking for. Basically, I figured out how to pipe data into the std::in of the convert execution. This makes it possible for me to convert images without accessing the local file system.
Here is my demo code:
var im = require('imagemagick');
var fs = require('fs');
var svg = fs.readFileSync('/somepath/svg.svg', 'utf8');
var conv = im.convert(['svg:-', 'png:-'])
conv.on('data', function(data) {
console.log('data');
console.log(data);
});
conv.on('end', function() {
console.log('end');
});
conv.stdin.write(svg);
conv.stdin.end();
you can also use streams and pipe the result somewhere without storing the result as a temp file. Below is some sample code take from the github repo
var fs = require('fs');
im.resize({
srcData: fs.readFileSync('kittens.jpg', 'binary'),
width: 256,
format: 'png'
}, function(err, stdout, stderr){
if (err) throw err
fs.writeFileSync('kittens-resized.png', stdout, 'binary'); // change this part
console.log('resized kittens.jpg to fit within 256x256px')
});
btw: your acceptance rate is 0%
You can also use svgexport (I'm its author):
var svgexport = require('svgexport');
svgexport.render({input: 'file.svg', output: 'file.png'}, callback);
