Function testHTMLImage

test/features/dynamic-arguments.js:6–43

(done, mode)

describe('features: dynamic arguments');

function testHTMLImage(done, mode) {
  const image1 = new Image();
  const image2 = new Image();
  image1.src = 'jellyfish.jpeg';
  image2.src = 'jellyfish-1.jpeg';
  let loadedCount = 0;
  image1.onload = image2.onload = () => {
    loadedCount++;
    if (loadedCount === 2) loaded();
  };

  function loaded() {
    const gpu = new GPU({ mode });
    const kernel = gpu.createKernel(function(image) {
      const pixel = image[this.thread.y][this.thread.x];
      return (pixel[0] + pixel[1] + pixel[2]) / 3;
    })
      .setDynamicArguments(true)
      .setDynamicOutput(true)
      .setOutput([276, 183]);

    const pixels1 = kernel(image1);
    kernel.setOutput([138, 91]);
    const pixels2 = kernel(image2);

    assert.ok(pixels1[0][0] > .43);
    assert.ok(pixels1[0][0] < .45);
    assert.equal(pixels1.length, image1.height);
    assert.equal(pixels1[0].length, image1.width);
    assert.ok(pixels2[0][0] > .82);
    assert.ok(pixels2[0][0] < .83);
    assert.equal(pixels2.length, image2.height);
    assert.equal(pixels2[0].length, image2.width);

    gpu.destroy();
    done();
  }
}

(typeof Image !== 'undefined' ? test : skip)('HTML Image auto', t => {
  testHTMLImage(t.async());