let img0;

​

function preload() {

  basicShader = loadShader('basic.vert', 'basic.frag');

  img0 = loadImage("t1024.jpg");

}

​

function setup() {

  createCanvas(500, 500, WEBGL);

}

​

function draw() {

  shader(basicShader);

  basicShader.setUniform('uTexture', img0);

  basicShader.setUniform('uResolution', [width, height]);

  quad(-1, -1, 1, -1, 1, 1, -1, 1);

}