OLD | NEW |
(Empty) | |
| 1 // Copyright 2016 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 function getConstraintsForDevice(deviceLabel) { |
| 6 return new Promise(function(resolve, reject) { |
| 7 navigator.mediaDevices.enumerateDevices() |
| 8 .then(function(devices) { |
| 9 for (var i = 0; i < devices.length; ++i) { |
| 10 if (deviceLabel == devices[i].label) { |
| 11 return resolve({video:{deviceId: {exact: devices[i].deviceId}, |
| 12 width: {exact:96}, |
| 13 height: {exact:96}} |
| 14 }); |
| 15 } |
| 16 } |
| 17 return reject("Expected to have a device with label:" + deviceLabel); |
| 18 }) |
| 19 }); |
| 20 } |
| 21 |
| 22 function getFake16bitStream() { |
| 23 return new Promise(function(resolve, reject) { |
| 24 getConstraintsForDevice("fake_device_1") |
| 25 .then(function(constraints) { |
| 26 if (!constraints) |
| 27 return reject("No fake device found"); |
| 28 return navigator.mediaDevices.getUserMedia(constraints); |
| 29 }).then(function(stream) { |
| 30 return resolve(stream); |
| 31 }); |
| 32 }); |
| 33 } |
| 34 |
| 35 function testVideoToImageBitmap(videoElementName, success, error) |
| 36 { |
| 37 var bitmaps = {}; |
| 38 var video = $(videoElementName); |
| 39 var canvas = document.createElement('canvas'); |
| 40 canvas.width = 96; |
| 41 canvas.height = 96; |
| 42 document.body.appendChild(canvas); |
| 43 var p1 = createImageBitmap(video).then(function(imageBitmap) { return runImage
BitmapTest(imageBitmap, canvas, false); }); |
| 44 var p2 = createImageBitmap(video, {imageOrientation: "none", premultiplyAlpha:
"premultiply"}).then(function(imageBitmap) { return runImageBitmapTest(imageBit
map, canvas, false); }); |
| 45 var p3 = createImageBitmap(video, {imageOrientation: "none", premultiplyAlpha:
"default"}).then(function(imageBitmap) { return runImageBitmapTest(imageBitmap,
canvas, false); }); |
| 46 var p4 = createImageBitmap(video, {imageOrientation: "none", premultiplyAlpha:
"none"}).then(function(imageBitmap) { return runImageBitmapTest(imageBitmap, ca
nvas, false); }); |
| 47 var p5 = createImageBitmap(video, {imageOrientation: "flipY", premultiplyAlpha
: "premultiply"}).then(function(imageBitmap) { return runImageBitmapTest(imageBi
tmap, canvas, true); }); |
| 48 var p6 = createImageBitmap(video, {imageOrientation: "flipY", premultiplyAlpha
: "default"}).then(function(imageBitmap) { return runImageBitmapTest(imageBitmap
, canvas, true); }); |
| 49 var p7 = createImageBitmap(video, {imageOrientation: "flipY", premultiplyAlpha
: "none"}).then(function(imageBitmap) { return runImageBitmapTest(imageBitmap, c
anvas, true); }); |
| 50 return Promise.all([p1, p2, p3, p4, p5, p6, p7]).then(success(), reason => { |
| 51 return error({name: reason}); |
| 52 }); |
| 53 } |
| 54 |
| 55 function runImageBitmapTest(bitmap, canvas, flipped) { |
| 56 var context = canvas.getContext('2d'); |
| 57 context.drawImage(bitmap,0,0); |
| 58 var imageData = context.getImageData(0, 0, canvas.width, canvas.height); |
| 59 // Fake capture device 96x96 depth image is gradient. See also |
| 60 // Draw16BitGradient in fake_video_capture_device.cc. |
| 61 var color_step = 255.0 / (canvas.width + canvas.height); |
| 62 var rowsColumnsToCheck = [[1, 1], |
| 63 [0, canvas.width - 1], |
| 64 [canvas.height - 1, 0], |
| 65 [canvas.height - 1, canvas.width - 1], |
| 66 [canvas.height / 2, canvas.width / 3]]; |
| 67 |
| 68 // Same value is expected for all color components. |
| 69 if (imageData.data[0] != imageData.data[1] || imageData.data[0] != imageData.d
ata[2]) |
| 70 return Promise.reject("Values " + imageData.data[0] + ", " + imageData.data[
1] + ", " + imageData.data[2] + " differ at top left"); |
| 71 |
| 72 // Calculate all reference points based on top left and compare with real valu
es. |
| 73 for (var j = 0; j < rowsColumnsToCheck.length; ++j) { |
| 74 var row = rowsColumnsToCheck[j][0]; |
| 75 var column = rowsColumnsToCheck[j][1]; |
| 76 var i = (canvas.width * row + column) * 4; |
| 77 if (imageData.data[i] != imageData.data[i + 1] || imageData.data[i] != image
Data.data[i + 2]) |
| 78 return Promise.reject("Values " + imageData.data[i] + ", " + imageData.dat
a[i + 1] + ", " + imageData.data[i + 2] + " differ at index " + i); |
| 79 var calculated = (imageData.data[0] + color_step * ((flipped ? -row : row) +
column)) % 255; |
| 80 if (Math.abs(calculated - imageData.data[i]) > 2) |
| 81 return Promise.reject("Reference value " + imageData.data[i] + " differs f
rom calculated: " + calculated + " at index " + i + ". TopLeft value:" + imageDa
ta.data[0]); |
| 82 } |
| 83 return true; |
| 84 } |
OLD | NEW |