| <!DOCTYPE html> |
| <script src =../../resources/testharness.js></script> |
| <script src =../../resources/testharnessreport.js></script> |
| <script> |
| |
| function draw2d(canvas) { |
| var ctx = canvas.getContext('2d'); |
| ctx.fillStyle = 'green'; |
| ctx.fillRect(0, 0, canvas.width, canvas.height); |
| return ctx; |
| }; |
| |
| function drawWebGL(canvas) { |
| var gl = canvas.getContext('webgl'); |
| gl.clearColor(0, 1, 0, 1); |
| gl.clear(gl.COLOR_BUFFER_BIT); |
| return gl; |
| }; |
| |
| // Run captureStream() after transferControlToOffscreen(). |
| var testOffScreenCanvasCommits = function(drawFunction, message) { |
| async_test(function(test) { |
| var canvas = document.createElement('canvas'); |
| var offscreen = canvas.transferControlToOffscreen(); |
| |
| var recorder = new MediaRecorder(canvas.captureStream()); |
| recorder.ondataavailable = test.step_func_done(function(event) { |
| assert_true(event.data.size > 0, 'Recorded data size should be > 0'); |
| }); |
| recorder.start(0); |
| |
| var ctx = drawFunction(offscreen); |
| ctx.commit(); |
| }), message; |
| }; |
| |
| testOffScreenCanvasCommits(draw2d, |
| 'capture of an OffscreenCanvas with 2D context'); |
| testOffScreenCanvasCommits(drawWebGL, |
| 'capture of an OffscreenCanvas with WebGL context'); |
| </script> |
