57 lines
1.8 KiB
JavaScript
57 lines
1.8 KiB
JavaScript
var fs = require('fs');
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var path = require('path');
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var SVGO = require('svgo');
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var dot = require('dot');
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// Initialize what will be used for automatic text measurement.
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var Canvas = require('canvas');
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var canvasElement = new Canvas(0, 0); // Width and height are irrelevant.
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var canvasContext = canvasElement.getContext('2d');
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var CanvasFont = Canvas.Font;
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try {
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var opensans = new CanvasFont('Verdana',
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path.join(__dirname, 'Verdana.ttf'));
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canvasContext.addFont(opensans);
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} catch(e) {}
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canvasContext.font = '11px Verdana, "DejaVu Sans"';
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function makeTemplate(colorscheme, template) {
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// Template crafting action below.
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var colorscheme = require(path.join(__dirname, 'templates', (colorscheme || 'default') + '-colorscheme.json'));
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var template = fs.readFileSync(path.join(__dirname, 'templates', (template || 'default') + '-template.svg'));
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var imageTemplate = dot.template(''+template);
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imageTemplate.colorscheme = colorscheme;
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return imageTemplate;
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}
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var defaultTemplate = makeTemplate();
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function optimize(string, callback) {
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var svgo = new SVGO();
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svgo.optimize(string, callback);
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}
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function makeImage(data, options, cb) {
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if (typeof options === 'function') {
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cb = options
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options = {}
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}
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var template = defaultTemplate;
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if (options.colorscheme || options.template) {
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template = makeTemplate(options.colorscheme, options.template);
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}
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if (data.colorscheme) {
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data.colorA = template.colorscheme[data.colorscheme].colorA;
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data.colorB = template.colorscheme[data.colorscheme].colorB;
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}
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data.widths = [
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(canvasContext.measureText(data.text[0]).width|0) + 10,
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(canvasContext.measureText(data.text[1]).width|0) + 10,
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];
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var result = template(data);
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// Run the SVG through SVGO.
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optimize(result, function(object) { cb(object.data); });
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}
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module.exports = makeImage;
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