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Rasterizes svg images to (alpha) png with phantomjs
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#! /usr/bin/env phantomjs | |
// -*- js2 -*- | |
var webpage = require('webpage') | |
, system = require('system') | |
, URL, FILENAME, W, H; | |
; | |
if (system.args.length < 2 || system.args.length > 5) { | |
console.log('Usage: svg2png source.svg output.png [width||?] [height||?]'); | |
phantom.exit(); | |
} | |
else { | |
URL = system.args[1]; | |
FILENAME = system.args[2]; | |
W = Number(system.args[3]); | |
H = Number(system.args[4]); | |
if (isNaN(W)) W = undefined; | |
if (isNaN(H)) H = undefined; | |
peek(URL, grabSize); | |
} | |
function peek(url, fn) { | |
var page = webpage.create(); | |
page.onConsoleMessage = function(msg) { | |
console.log(msg); | |
}; | |
page.open(url, function (status) { | |
if (status !== 'success') | |
console.log('Unable to load ' + url); | |
else | |
fn(page); | |
}); | |
} | |
function grabSize(page) { | |
page.onConsoleMessage = function(msg) { | |
var d = JSON.parse(msg); | |
if (!W && !H) { W = d.w; H = d.h; } | |
if ( W && !H) { H = W * d.h / d.w; } | |
if (!W && H) { W = H * d.w / d.h; } | |
console.log(JSON.stringify(d), W, H); | |
screenshot(URL, FILENAME, W, H); | |
}; | |
page.evaluate(function() { | |
var svg = document.documentElement | |
, w = svg.getAttribute('width') | |
, h = svg.getAttribute('height') | |
, box = svg.viewBox.animVal | |
, b_w = box.width | |
, b_h = box.height | |
; | |
if (b_w && b_h) { | |
if (w && !h) h = w * b_h / b_w; | |
if (h && !w) w = h * b_w / b_h; | |
if (!w&& !h) { | |
w = b_w; | |
h = b_h; | |
} | |
} | |
console.log(JSON.stringify({ w: Number(w), h: Number(h) })); | |
}); | |
} | |
function screenshot(url, filename, w, h) { | |
var page = webpage.create(); | |
page.viewportSize = { width: w, height: h }; | |
page.open(url, function (status) { | |
if (status !== 'success') { | |
console.log('Unable to load ' + url); | |
phantom.exit(); | |
} | |
else { | |
window.setTimeout(function () { | |
page.render(filename); | |
phantom.exit(); | |
}, 200); | |
} | |
}); | |
} |
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