gridpaint/lib/save.js

a canvas for creating grid-based art in the browser

var FileSaver = require('file-saver'),

    Canvas = require('./canvas');

// export the painting to file
module.exports = function (file, scale) {
    var exported = new Canvas(),
        eCtx = exported.getContext('2d');

    file = file || 'painting.png';
    scale = scale || 1;

    exported.width = this.width * this.cellWidth * scale;
    exported.height = this.height * this.cellHeight * scale;
    this.drawPainting(eCtx, scale);

    if (process.title === 'browser') {
        exported.toBlob(function (blob) {
            FileSaver.saveAs(blob, file);
        });
    } else {
        exported.pngStream().pipe(require('fs').createWriteStream('./' + file));
    }
};