png engine for spritesmith

npm install pngsmith
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pngsmith Build status

png engine for spritesmith.

This can be used for constructing a canvas, placing images on it, and extracting the result image.

Getting Started

Install the module with: npm install pngsmith

// Convert images into pngsmith objects
var images = ['img1.jpg', 'img2.png'];
pngsmith.createImages(this.images, function handleImages (err, imgs) {
  // Create a canvas to draw onto (200 pixels wide, 300 pixels tall)
  pngsmith.createCanvas(200, 200, function (err, canvas) {
    // Add each image at a specific location (upper left corner = {x, y})
    var coordinatesArr = [{x: 0, y: 0}, {x: 50, y: 50}];
    imgs.forEach(function (img, i) {
      var coordinates = coordinatesArr[i];
      canvas.addImage(img, coordinates.x, coordinates.y);
    }, canvas);

    // Export canvas to image
    canvas['export']({format: 'png'}, function (err, result) {
      result; // Binary string representing a PNG image of the canvas


This module was built to the specification for all spritesmith modules.


In lieu of a formal styleguide, take care to maintain the existing coding style. Add unit tests for any new or changed functionality. Lint using grunt and test via npm test.


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As of Dec 13 2013, Todd Wolfson has released this repository and its contents to the public domain.

It has been released under the UNLICENSE.

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