798802-1.html (542B)
1 <html> 2 <head> 3 <script> 4 onload = function() { 5 var canvas2d = document.createElement('canvas') 6 canvas2d.setAttribute('width', 0) 7 document.body.appendChild(canvas2d) 8 var ctx2d = canvas2d.getContext('2d') 9 ctx2d.fillStyle = 'black' 10 var gl = document.createElement('canvas').getContext('experimental-webgl') 11 gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, canvas2d) 12 ctx2d.fillRect(0, 0, 1, 1) 13 } 14 </script> 15 </head> 16 <body> 17 </body> 18 </html>