| <!DOCTYPE html> |
| <html> |
| <head> |
| <video id="video" width=480px height=480px controls ></video> |
| <canvas id="canvas" width=640px height=480px></canvas> |
| <script src="../../resources/testharness.js"></script> |
| <script src="../../resources/testharnessreport.js"></script> |
| <script> |
| |
| const canvas = document.getElementById("canvas"); |
| const video = document.getElementById("video"); |
| |
| function isPixelBlack(pixel) |
| { |
| return pixel[0] === 0 && pixel[1] === 0 && pixel[2] === 0 && pixel[3] === 255; |
| } |
| |
| function logPixel(name, pixel) |
| { |
| console.log(`${name}: ${pixel[0]}, ${pixel[1]}, ${pixel[2]}, ${pixel[3]}`); |
| } |
| |
| function checkCanvas(canvas, stream) |
| { |
| return new Promise((resolve, reject) => { |
| video.srcObject = stream; |
| video.oncanplay = () => { |
| const ctx = canvas.getContext("2d"); |
| ctx.drawImage(video, 0 ,0); |
| |
| try { |
| setTimeout(() => { |
| assert_false(isPixelBlack(ctx.getImageData(5, 5, 1, 1).data), "Pixel at 5x5 is not black."); |
| assert_false(isPixelBlack(ctx.getImageData(50, 200, 1, 1).data), "Pixel at 50x200 is not black."); |
| resolve(); |
| }, 500); |
| } catch(err) { |
| reject(err); |
| return; |
| } |
| } |
| }); |
| } |
| |
| promise_test(async () => { |
| let stream = await navigator.mediaDevices.getUserMedia({ video: true }); |
| stream = null; |
| |
| const devices = await navigator.mediaDevices.enumerateDevices(); |
| let cameraID = undefined; |
| devices.forEach(device => { if (device.label == "Mock video device 2") cameraID = device.deviceId; }); |
| assert_true(cameraID !== undefined, "Found camera2"); |
| |
| stream = await navigator.mediaDevices.getUserMedia({ video: { deviceId: { exact: cameraID } } }); |
| |
| return checkCanvas(canvas, stream); |
| |
| }, "A frame from the camera is shown before playback begins."); |
| |
| </script> |
| </head> |
| </html> |
