'use strict';

Object.defineProperty(exports, '__esModule', { value: true });

function domCanvas(w, h) {
  if (typeof document !== 'undefined' && document.createElement) {
    var c = document.createElement('canvas');
    if (c && c.getContext) {
      c.width = w;
      c.height = h;
      return c;
    }
  }
  return null;
}

function domImage() {
  return typeof Image !== 'undefined' ? Image : null;
}

var NodeCanvas;

try {
  NodeCanvas = require('canvas');
  if (!(NodeCanvas && NodeCanvas.createCanvas)) {
    NodeCanvas = null;
  }
} catch (error) {
  // do nothing
}

function nodeCanvas(w, h, type) {
  if (NodeCanvas) {
    try {
      return new NodeCanvas.Canvas(w, h, type);
    } catch (e) {
      // do nothing, return null on error
    }
  }
  return null;
}

function nodeImage() {
  return (NodeCanvas && NodeCanvas.Image) || null;
}

function canvas(w, h, type) {
  return domCanvas(w, h) || nodeCanvas(w, h, type) || null;
}

function image() {
  return domImage() || nodeImage() || null;
}

exports.canvas = canvas;
exports.image = image;
exports.domCanvas = domCanvas;
exports.nodeCanvas = nodeCanvas;