import puppeteer from 'puppeteer';
const b = await puppeteer.launch({ args:['--no-sandbox','--disable-setuid-sandbox','--use-gl=angle','--enable-unsafe-swiftshader','--ignore-gpu-blocklist'] });
const p = await b.newPage();
await p.setViewport({width:800,height:600});
await p.goto('about:blank',{waitUntil:'load'});
await new Promise(r=>setTimeout(r,300));
const r = await p.evaluate(()=>{
  const cv=document.createElement('canvas'); cv.width=64; cv.height=64; document.body.appendChild(cv);
  const gl=cv.getContext('webgl2');
  if(!gl) return {webgl2:false};
  const vs=`#version 300 es\nin vec4 a_position; void main(){ gl_Position=a_position; }`;
  const fs=`#version 300 es\nprecision mediump float; out vec4 o; void main(){ o=vec4(1.0,0.3,0.0,1.0); }`;
  const mk=(s)=>{const sh=gl.createShader(s.includes('main(){ gl_Position')?gl.VERTEX_SHADER:gl.FRAGMENT_SHADER);gl.shaderSource(sh,s);gl.compileShader(sh);return {sh,ok:gl.getShaderParameter(sh,gl.COMPILE_STATUS),log:gl.getShaderInfoLog(sh)};};
  const v=mk(vs), f=mk(fs);
  const prog=gl.createProgram(); gl.attachShader(prog,v.sh); gl.attachShader(prog,f.sh); gl.linkProgram(prog);
  const linked=gl.getProgramParameter(prog,gl.LINK_STATUS);
  gl.useProgram(prog);
  const buf=gl.createBuffer(); gl.bindBuffer(gl.ARRAY_BUFFER,buf); gl.bufferData(gl.ARRAY_BUFFER,new Float32Array([-1,-1,1,-1,-1,1,-1,1,1,-1,1,1]),gl.STATIC_DRAW);
  const loc=gl.getAttribLocation(prog,'a_position'); gl.enableVertexAttribArray(loc); gl.vertexAttribPointer(loc,2,gl.FLOAT,false,0,0);
  gl.clearColor(0,0,0,1); gl.clear(gl.COLOR_BUFFER_BIT);
  gl.drawArrays(gl.TRIANGLES,0,6);
  const px=new Uint8Array(4); gl.readPixels(32,32,1,1,gl.RGBA,gl.UNSIGNED_BYTE,px);
  return { webgl2:true, vsOk:v.ok, fsOk:f.ok, fsLog:f.log, linked, center:Array.from(px) };
});
console.log(JSON.stringify(r,null,1));
await b.close();