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Rasterize only the specified element instead the whole page (PhantomJS)
var page = require('webpage').create(),
system = require('system'),
address, output, size;
if (system.args.length < 4 || system.args.length > 6) {
console.log('Usage: rasterize_element.js URL filename selector [paperwidth*paperheight|paperformat] [zoom]');
console.log(' paper (pdf output) examples: "5in*7.5in", "10cm*20cm", "A4", "Letter"');
phantom.exit(1);
} else {
address = system.args[1];
output = system.args[2];
selector = system.args[3];
page.viewportSize = { width: 600, height: 600 };
if (system.args.length > 3 && system.args[2].substr(-4) === ".pdf") {
size = system.args[3].split('*');
page.paperSize = size.length === 2 ? { width: size[0], height: size[1], margin: '0px' }
: { format: system.args[3], orientation: 'portrait', margin: '1cm' };
}
if (system.args.length > 4) {
page.zoomFactor = system.args[4];
}
console.log("Loading page...");
page.open(address, function (status) {
if (status !== 'success') {
console.log('Unable to load the address!');
} else {
window.setTimeout(function () {
console.log("Getting element clipRect...");
var clipRect = page.evaluate(function (s) {
var cr = document.querySelector(s).getBoundingClientRect();
return cr;
}, selector);
page.clipRect = {
top: clipRect.top,
left: clipRect.left,
width: clipRect.width,
height: clipRect.height
};
console.log("Rendering to file...");
page.render(output);
phantom.exit();
}, 200);
}
});
}
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