62 lines
1.9 KiB
JavaScript
62 lines
1.9 KiB
JavaScript
var fs = require('fs');
|
|
var path = require('path');
|
|
var SVGO = require('svgo');
|
|
var dot = require('dot');
|
|
|
|
// Initialize what will be used for automatic text measurement.
|
|
var Canvas = require('canvas');
|
|
var canvasElement = new Canvas(0, 0); // Width and height are irrelevant.
|
|
var canvasContext = canvasElement.getContext('2d');
|
|
var CanvasFont = Canvas.Font;
|
|
try {
|
|
var opensans = new CanvasFont('Verdana',
|
|
path.join(__dirname, 'Verdana.ttf'));
|
|
canvasContext.addFont(opensans);
|
|
} catch(e) {}
|
|
canvasContext.font = '11px Verdana, "DejaVu Sans"';
|
|
|
|
// cache templates.
|
|
var templates = {};
|
|
var templateFiles = fs.readdirSync(path.join(__dirname, 'templates'));
|
|
templateFiles.forEach(function(filename) {
|
|
var templateData = fs.readFileSync(
|
|
path.join(__dirname, 'templates', filename)).toString();
|
|
var extension = filename.split('.').pop();
|
|
var style = filename.slice(0, -(('-template.' + extension).length));
|
|
templates[style + '-' + extension] = dot.template(templateData);
|
|
});
|
|
|
|
var colorscheme = require(path.join(__dirname, 'colorscheme.json'));
|
|
|
|
function optimize(string, callback) {
|
|
var svgo = new SVGO();
|
|
svgo.optimize(string, callback);
|
|
}
|
|
|
|
function makeImage(data, cb) {
|
|
if (data.format !== 'json') {
|
|
data.format = 'svg';
|
|
}
|
|
if (!(data.template + '-' + data.format in templates)) {
|
|
data.template = 'default';
|
|
}
|
|
var template = templates[data.template + '-' + data.format];
|
|
if (data.colorscheme) {
|
|
data.colorA = colorscheme[data.colorscheme].colorA;
|
|
data.colorB = colorscheme[data.colorscheme].colorB;
|
|
}
|
|
data.widths = [
|
|
(canvasContext.measureText(data.text[0]).width|0) + 10,
|
|
(canvasContext.measureText(data.text[1]).width|0) + 10,
|
|
];
|
|
var result = template(data);
|
|
if (data.format === 'json') {
|
|
cb(result);
|
|
} else {
|
|
// Run the SVG through SVGO.
|
|
optimize(result, function(object) { cb(object.data); });
|
|
}
|
|
}
|
|
|
|
module.exports = makeImage;
|