pixelread.js

const Regl = require('regl');

const example = (root) => () => {
    const regl = Regl(root);
    regl({
        framebuffer: regl.framebuffer(2),
        attributes: {
            position: [
                [-1, -1, 0],
                [-1, 1, 0],
                [1, 1, 0],
                [1, -1, 0],
                [-1, -1, 0],
            ]
        },
        primitive: 'triangle strip',
        count: 5,
        vert: `
        attribute vec3 position;
        void main(){
            gl_Position = vec4(position, 1);
        }
        `,
        frag: `
        void main() {
            gl_FragColor = vec4(0.5, 0.5, 0.5, 1);
        }
        `
    })(() => {
        regl.draw();
        console.log(regl.read().toString());
    })
}


module.exports = example;