const { assert, skip, test, module: describe } = require('qunit');

const { GPU } = require('../../src');

describe('features: read from image data');

function readImageData(mode) {

const gpu = new GPU({ mode });

const dataArray = new Uint8ClampedArray([255, 255, 255, 255]);

const imageData = new ImageData(dataArray, 1, 1);

const kernel = gpu.createKernel(function(imageData) {

const pixel = imageData[this.thread.y][this.thread.x];

return pixel[0] + pixel[1] + pixel[2] + pixel[3];

}, {

output: [1]

});

const result = kernel(imageData);

assert.equal(result.length, 1);

assert.equal(result[0], 4);

gpu.destroy();

}

(typeof ImageData !== 'undefined' ? test : skip)('readImageData auto', () => {

readImageData(null);

});

(typeof ImageData !== 'undefined' ? test : skip)('readImageData gpu', () => {

readImageData('gpu');

});

(GPU.isWebGLSupported && typeof ImageData !== 'undefined' ? test : skip)('readImageData webgl', () => {

readImageData('webgl');

});

(GPU.isWebGL2Supported && typeof ImageData !== 'undefined' ? test : skip)('readImageData webgl2', () => {

readImageData('webgl2');

});

(GPU.isHeadlessGLSupported && typeof ImageData !== 'undefined' ? test : skip)('readImageData headlessgl', () => {

readImageData('headlessgl');

});

(typeof ImageData !== 'undefined' ? test : skip)('readImageData cpu', () => {

readImageData('cpu');

});