当我使用 Windows Phone 的横向模式拍照时，效果非常好。当我以人像模式拍照时出现问题。
照片旋转了 90 度。它甚至出现在模拟器中，如下所示。
现在这不会发生在 Android 或 iOS 上，所以我假设这是因为 Windows 使用 CameraProxy.js 而不是/来自 cordova-plugin-camera .
我的整个 CameraProxy.js(巨大的文件，确实包含“旋转”的东西，但方法名称仅与视频有关)
cordova.define("cordova-plugin-camera.CameraProxy", function(require, exports, module) {
var Camera = require('./Camera');
var getAppData = function () {
return Windows.Storage.ApplicationData.current;
};
var encodeToBase64String = function (buffer) {
return Windows.Security.Cryptography.CryptographicBuffer.encodeToBase64String(buffer);
};
var OptUnique = Windows.Storage.CreationCollisionOption.generateUniqueName;
var CapMSType = Windows.Media.Capture.MediaStreamType;
var webUIApp = Windows.UI.WebUI.WebUIApplication;
var fileIO = Windows.Storage.FileIO;
var pickerLocId = Windows.Storage.Pickers.PickerLocationId;
module.exports = {
// args will contain :
// ... it is an array, so be careful
// 0 quality:50,
// 1 destinationType:Camera.DestinationType.FILE_URI,
// 2 sourceType:Camera.PictureSourceType.CAMERA,
// 3 targetWidth:-1,
// 4 targetHeight:-1,
// 5 encodingType:Camera.EncodingType.JPEG,
// 6 mediaType:Camera.MediaType.PICTURE,
// 7 allowEdit:false,
// 8 correctOrientation:false,
// 9 saveToPhotoAlbum:false,
// 10 popoverOptions:null
// 11 cameraDirection:0
takePicture: function (successCallback, errorCallback, args) {
var sourceType = args[2];
if (sourceType != Camera.PictureSourceType.CAMERA) {
takePictureFromFile(successCallback, errorCallback, args);
} else {
takePictureFromCamera(successCallback, errorCallback, args);
}
}
};
// https://msdn.microsoft.com/en-us/library/windows/apps/ff462087(v=vs.105).aspx
var windowsVideoContainers = [".avi", ".flv", ".asx", ".asf", ".mov", ".mp4", ".mpg", ".rm", ".srt", ".swf", ".wmv", ".vob"];
var windowsPhoneVideoContainers = [".avi", ".3gp", ".3g2", ".wmv", ".3gp", ".3g2", ".mp4", ".m4v"];
// Default aspect ratio 1.78 (16:9 hd video standard)
var DEFAULT_ASPECT_RATIO = '1.8';
// Highest possible z-index supported across browsers. Anything used above is converted to this value.
var HIGHEST_POSSIBLE_Z_INDEX = 2147483647;
// Resize method
function resizeImage(successCallback, errorCallback, file, targetWidth, targetHeight, encodingType) {
var tempPhotoFileName = "";
var targetContentType = "";
if (encodingType == Camera.EncodingType.PNG) {
tempPhotoFileName = "camera_cordova_temp_return.png";
targetContentType = "image/png";
} else {
tempPhotoFileName = "camera_cordova_temp_return.jpg";
targetContentType = "image/jpeg";
}
var storageFolder = getAppData().localFolder;
file.copyAsync(storageFolder, file.name, Windows.Storage.NameCollisionOption.replaceExisting)
.then(function (storageFile) {
return fileIO.readBufferAsync(storageFile);
})
.then(function(buffer) {
var strBase64 = encodeToBase64String(buffer);
var imageData = "data:" + file.contentType + ";base64," + strBase64;
var image = new Image();
image.src = imageData;
image.onload = function() {
var ratio = Math.min(targetWidth / this.width, targetHeight / this.height);
var imageWidth = ratio * this.width;
var imageHeight = ratio * this.height;
var canvas = document.createElement('canvas');
var storageFileName;
canvas.width = imageWidth;
canvas.height = imageHeight;
canvas.getContext("2d").drawImage(this, 0, 0, imageWidth, imageHeight);
var fileContent = canvas.toDataURL(targetContentType).split(',')[1];
var storageFolder = getAppData().localFolder;
storageFolder.createFileAsync(tempPhotoFileName, OptUnique)
.then(function (storagefile) {
var content = Windows.Security.Cryptography.CryptographicBuffer.decodeFromBase64String(fileContent);
storageFileName = storagefile.name;
return fileIO.writeBufferAsync(storagefile, content);
})
.done(function () {
successCallback("ms-appdata:///local/" + storageFileName);
}, errorCallback);
};
})
.done(null, function(err) {
errorCallback(err);
}
);
}
function takePictureFromFile(successCallback, errorCallback, args) {
// Detect Windows Phone
if (navigator.appVersion.indexOf('Windows Phone 8.1') >= 0) {
takePictureFromFileWP(successCallback, errorCallback, args);
} else {
takePictureFromFileWindows(successCallback, errorCallback, args);
}
}
function takePictureFromFileWP(successCallback, errorCallback, args) {
var mediaType = args[6],
destinationType = args[1],
targetWidth = args[3],
targetHeight = args[4],
encodingType = args[5];
var filePickerActivationHandler = function(eventArgs) {
if (eventArgs.kind === Windows.ApplicationModel.Activation.ActivationKind.pickFileContinuation) {
var file = eventArgs.files[0];
if (!file) {
errorCallback("User didn't choose a file.");
webUIApp.removeEventListener("activated", filePickerActivationHandler);
return;
}
if (destinationType == Camera.DestinationType.FILE_URI || destinationType == Camera.DestinationType.NATIVE_URI) {
if (targetHeight > 0 && targetWidth > 0) {
resizeImage(successCallback, errorCallback, file, targetWidth, targetHeight, encodingType);
}
else {
var storageFolder = getAppData().localFolder;
file.copyAsync(storageFolder, file.name, Windows.Storage.NameCollisionOption.replaceExisting).done(function (storageFile) {
if(destinationType == Camera.DestinationType.NATIVE_URI) {
successCallback("ms-appdata:///local/" + storageFile.name);
}
else {
successCallback(URL.createObjectURL(storageFile));
}
}, function () {
errorCallback("Can't access localStorage folder.");
});
}
}
else {
if (targetHeight > 0 && targetWidth > 0) {
resizeImageBase64(successCallback, errorCallback, file, targetWidth, targetHeight);
} else {
fileIO.readBufferAsync(file).done(function (buffer) {
var strBase64 =encodeToBase64String(buffer);
successCallback(strBase64);
}, errorCallback);
}
}
webUIApp.removeEventListener("activated", filePickerActivationHandler);
}
};
var fileOpenPicker = new Windows.Storage.Pickers.FileOpenPicker();
if (mediaType == Camera.MediaType.PICTURE) {
fileOpenPicker.fileTypeFilter.replaceAll([".png", ".jpg", ".jpeg"]);
fileOpenPicker.suggestedStartLocation = pickerLocId.picturesLibrary;
}
else if (mediaType == Camera.MediaType.VIDEO) {
fileOpenPicker.fileTypeFilter.replaceAll(windowsPhoneVideoContainers);
fileOpenPicker.suggestedStartLocation = pickerLocId.videosLibrary;
}
else {
fileOpenPicker.fileTypeFilter.replaceAll(["*"]);
fileOpenPicker.suggestedStartLocation = pickerLocId.documentsLibrary;
}
webUIApp.addEventListener("activated", filePickerActivationHandler);
fileOpenPicker.pickSingleFileAndContinue();
}
function takePictureFromFileWindows(successCallback, errorCallback, args) {
var mediaType = args[6],
destinationType = args[1],
targetWidth = args[3],
targetHeight = args[4],
encodingType = args[5];
var fileOpenPicker = new Windows.Storage.Pickers.FileOpenPicker();
if (mediaType == Camera.MediaType.PICTURE) {
fileOpenPicker.fileTypeFilter.replaceAll([".png", ".jpg", ".jpeg"]);
fileOpenPicker.suggestedStartLocation = pickerLocId.picturesLibrary;
}
else if (mediaType == Camera.MediaType.VIDEO) {
fileOpenPicker.fileTypeFilter.replaceAll(windowsVideoContainers);
fileOpenPicker.suggestedStartLocation = pickerLocId.videosLibrary;
}
else {
fileOpenPicker.fileTypeFilter.replaceAll(["*"]);
fileOpenPicker.suggestedStartLocation = pickerLocId.documentsLibrary;
}
fileOpenPicker.pickSingleFileAsync().done(function (file) {
if (!file) {
errorCallback("User didn't choose a file.");
return;
}
if (destinationType == Camera.DestinationType.FILE_URI || destinationType == Camera.DestinationType.NATIVE_URI) {
if (targetHeight > 0 && targetWidth > 0) {
resizeImage(successCallback, errorCallback, file, targetWidth, targetHeight, encodingType);
}
else {
var storageFolder = getAppData().localFolder;
file.copyAsync(storageFolder, file.name, Windows.Storage.NameCollisionOption.replaceExisting).done(function (storageFile) {
if(destinationType == Camera.DestinationType.NATIVE_URI) {
successCallback("ms-appdata:///local/" + storageFile.name);
}
else {
successCallback(URL.createObjectURL(storageFile));
}
}, function () {
errorCallback("Can't access localStorage folder.");
});
}
}
else {
if (targetHeight > 0 && targetWidth > 0) {
resizeImageBase64(successCallback, errorCallback, file, targetWidth, targetHeight);
} else {
fileIO.readBufferAsync(file).done(function (buffer) {
var strBase64 =encodeToBase64String(buffer);
successCallback(strBase64);
}, errorCallback);
}
}
}, function () {
errorCallback("User didn't choose a file.");
});
}
function takePictureFromCamera(successCallback, errorCallback, args) {
// Check if necessary API available
if (!Windows.Media.Capture.CameraCaptureUI) {
takePictureFromCameraWP(successCallback, errorCallback, args);
} else {
takePictureFromCameraWindows(successCallback, errorCallback, args);
}
}
function takePictureFromCameraWP(successCallback, errorCallback, args) {
// We are running on WP8.1 which lacks CameraCaptureUI class
// so we need to use MediaCapture class instead and implement custom UI for camera
var destinationType = args[1],
targetWidth = args[3],
targetHeight = args[4],
encodingType = args[5],
saveToPhotoAlbum = args[9],
cameraDirection = args[11],
capturePreview = null,
cameraCaptureButton = null,
cameraCancelButton = null,
capture = null,
captureSettings = null,
CaptureNS = Windows.Media.Capture,
sensor = null;
}
function continueVideoOnFocus() {
// if preview is defined it would be stuck, play it
if (capturePreview) {
capturePreview.play();
}
}
function startCameraPreview() {
// Search for available camera devices
// This is necessary to detect which camera (front or back) we should use
var DeviceEnum = Windows.Devices.Enumeration;
var expectedPanel = cameraDirection === 1 ? DeviceEnum.Panel.front : DeviceEnum.Panel.back;
// Add focus event handler to capture the event when user suspends the app and comes back while the preview is on
window.addEventListener("focus", continueVideoOnFocus);
DeviceEnum.DeviceInformation.findAllAsync(DeviceEnum.DeviceClass.videoCapture).then(function (devices) {
if (devices.length <= 0) {
destroyCameraPreview();
errorCallback('Camera not found');
return;
}
devices.forEach(function(currDev) {
if (currDev.enclosureLocation.panel && currDev.enclosureLocation.panel == expectedPanel) {
captureSettings.videoDeviceId = currDev.id;
}
});
captureSettings.photoCaptureSource = Windows.Media.Capture.PhotoCaptureSource.photo;
return capture.initializeAsync(captureSettings);
}).then(function () {
// create focus control if available
var VideoDeviceController = capture.videoDeviceController;
var FocusControl = VideoDeviceController.focusControl;
if (FocusControl.supported === true) {
capturePreview.addEventListener('click', function () {
// Make sure function isn't called again before previous focus is completed
if (this.getAttribute('clicked') === '1') {
return false;
} else {
this.setAttribute('clicked', '1');
}
var preset = Windows.Media.Devices.FocusPreset.autoNormal;
var parent = this;
FocusControl.setPresetAsync(preset).done(function () {
// set the clicked attribute back to '0' to allow focus again
parent.setAttribute('clicked', '0');
});
});
}
// msdn.microsoft.com/en-us/library/windows/apps/hh452807.aspx
capturePreview.msZoom = true;
capturePreview.src = URL.createObjectURL(capture);
capturePreview.play();
// Bind events to controls
sensor = Windows.Devices.Sensors.SimpleOrientationSensor.getDefault();
if (sensor !== null) {
sensor.addEventListener("orientationchanged", onOrientationChange);
}
// add click events to capture and cancel buttons
cameraCaptureButton.addEventListener('click', onCameraCaptureButtonClick);
cameraCancelButton.addEventListener('click', onCameraCancelButtonClick);
// Change default orientation
if (sensor) {
setPreviewRotation(sensor.getCurrentOrientation());
} else {
setPreviewRotation(Windows.Graphics.Display.DisplayInformation.getForCurrentView().currentOrientation);
}
// Get available aspect ratios
var aspectRatios = getAspectRatios(capture);
// Couldn't find a good ratio
if (aspectRatios.length === 0) {
destroyCameraPreview();
errorCallback('There\'s not a good aspect ratio available');
return;
}
// add elements to body
document.body.appendChild(capturePreview);
document.body.appendChild(cameraCaptureButton);
document.body.appendChild(cameraCancelButton);
if (aspectRatios.indexOf(DEFAULT_ASPECT_RATIO) > -1) {
return setAspectRatio(capture, DEFAULT_ASPECT_RATIO);
} else {
// Doesn't support 16:9 - pick next best
return setAspectRatio(capture, aspectRatios[0]);
}
}).done(null, function (err) {
destroyCameraPreview();
errorCallback('Camera intitialization error ' + err);
});
}
function destroyCameraPreview() {
// If sensor is available, remove event listener
if (sensor !== null) {
sensor.removeEventListener('orientationchanged', onOrientationChange);
}
// Pause and dispose preview element
capturePreview.pause();
capturePreview.src = null;
// Remove event listeners from buttons
cameraCaptureButton.removeEventListener('click', onCameraCaptureButtonClick);
cameraCancelButton.removeEventListener('click', onCameraCancelButtonClick);
// Remove the focus event handler
window.removeEventListener("focus", continueVideoOnFocus);
// Remove elements
[capturePreview, cameraCaptureButton, cameraCancelButton].forEach(function (elem) {
if (elem /* && elem in document.body.childNodes */) {
document.body.removeChild(elem);
}
});
// Stop and dispose media capture manager
if (capture) {
capture.stopRecordAsync();
capture = null;
}
}
function getAspectRatios(capture) {
var videoDeviceController = capture.videoDeviceController;
var photoAspectRatios = videoDeviceController.getAvailableMediaStreamProperties(CapMSType.photo).map(function (element) {
return (element.width / element.height).toFixed(1);
}).filter(function (element, index, array) { return (index === array.indexOf(element)); });
var videoAspectRatios = videoDeviceController.getAvailableMediaStreamProperties(CapMSType.videoRecord).map(function (element) {
return (element.width / element.height).toFixed(1);
}).filter(function (element, index, array) { return (index === array.indexOf(element)); });
var videoPreviewAspectRatios = videoDeviceController.getAvailableMediaStreamProperties(CapMSType.videoPreview).map(function (element) {
return (element.width / element.height).toFixed(1);
}).filter(function (element, index, array) { return (index === array.indexOf(element)); });
var allAspectRatios = [].concat(photoAspectRatios, videoAspectRatios, videoPreviewAspectRatios);
var aspectObj = allAspectRatios.reduce(function (map, item) {
if (!map[item]) {
map[item] = 0;
}
map[item]++;
return map;
}, {});
return Object.keys(aspectObj).filter(function (k) {
return aspectObj[k] === 3;
});
}
function setAspectRatio(capture, aspect) {
// Max photo resolution with desired aspect ratio
var videoDeviceController = capture.videoDeviceController;
var photoResolution = videoDeviceController.getAvailableMediaStreamProperties(CapMSType.photo)
.filter(function (elem) {
return ((elem.width / elem.height).toFixed(1) === aspect);
})
.reduce(function (prop1, prop2) {
return (prop1.width * prop1.height) > (prop2.width * prop2.height) ? prop1 : prop2;
});
// Max video resolution with desired aspect ratio
var videoRecordResolution = videoDeviceController.getAvailableMediaStreamProperties(CapMSType.videoRecord)
.filter(function (elem) {
return ((elem.width / elem.height).toFixed(1) === aspect);
})
.reduce(function (prop1, prop2) {
return (prop1.width * prop1.height) > (prop2.width * prop2.height) ? prop1 : prop2;
});
// Max video preview resolution with desired aspect ratio
var videoPreviewResolution = videoDeviceController.getAvailableMediaStreamProperties(CapMSType.videoPreview)
.filter(function (elem) {
return ((elem.width / elem.height).toFixed(1) === aspect);
})
.reduce(function (prop1, prop2) {
return (prop1.width * prop1.height) > (prop2.width * prop2.height) ? prop1 : prop2;
});
return videoDeviceController.setMediaStreamPropertiesAsync(CapMSType.photo, photoResolution)
.then(function () {
return videoDeviceController.setMediaStreamPropertiesAsync(CapMSType.videoPreview, videoPreviewResolution);
})
.then(function () {
return videoDeviceController.setMediaStreamPropertiesAsync(CapMSType.videoRecord, videoRecordResolution);
});
}
/**
* When the phone orientation change, get the event and change camera preview rotation
* @param {Object} e - SimpleOrientationSensorOrientationChangedEventArgs
*/
function onOrientationChange(e) {
setPreviewRotation(e.orientation);
}
/**
* Converts SimpleOrientation to a VideoRotation to remove difference between camera sensor orientation
* and video orientation
* @param {number} orientation - Windows.Devices.Sensors.SimpleOrientation
* @return {number} - Windows.Media.Capture.VideoRotation
*/
function orientationToRotation(orientation) {
// VideoRotation enumerable and BitmapRotation enumerable have the same values
// https://msdn.microsoft.com/en-us/library/windows/apps/windows.media.capture.videorotation.aspx
// https://msdn.microsoft.com/en-us/library/windows/apps/windows.graphics.imaging.bitmaprotation.aspx
switch (orientation) {
// portrait
case Windows.Devices.Sensors.SimpleOrientation.notRotated:
return Windows.Media.Capture.VideoRotation.clockwise90Degrees;
// landscape
case Windows.Devices.Sensors.SimpleOrientation.rotated90DegreesCounterclockwise:
return Windows.Media.Capture.VideoRotation.none;
// portrait-flipped (not supported by WinPhone Apps)
case Windows.Devices.Sensors.SimpleOrientation.rotated180DegreesCounterclockwise:
// Falling back to portrait default
return Windows.Media.Capture.VideoRotation.clockwise90Degrees;
// landscape-flipped
case Windows.Devices.Sensors.SimpleOrientation.rotated270DegreesCounterclockwise:
return Windows.Media.Capture.VideoRotation.clockwise180Degrees;
// faceup & facedown
default:
// Falling back to portrait default
return Windows.Media.Capture.VideoRotation.clockwise90Degrees;
}
}
/**
* Rotates the current MediaCapture's video
* @param {number} orientation - Windows.Devices.Sensors.SimpleOrientation
*/
function setPreviewRotation(orientation) {
capture.setPreviewRotation(orientationToRotation(orientation));
}
try {
createCameraUI();
startCameraPreview();
} catch (ex) {
errorCallback(ex);
}
}
function takePictureFromCameraWindows(successCallback, errorCallback, args) {
var destinationType = args[1],
targetWidth = args[3],
targetHeight = args[4],
encodingType = args[5],
allowCrop = !!args[7],
saveToPhotoAlbum = args[9],
WMCapture = Windows.Media.Capture,
cameraCaptureUI = new WMCapture.CameraCaptureUI();
cameraCaptureUI.photoSettings.allowCropping = allowCrop;
if (encodingType == Camera.EncodingType.PNG) {
cameraCaptureUI.photoSettings.format = WMCapture.CameraCaptureUIPhotoFormat.png;
} else {
cameraCaptureUI.photoSettings.format = WMCapture.CameraCaptureUIPhotoFormat.jpeg;
}
// decide which max pixels should be supported by targetWidth or targetHeight.
var maxRes = null;
var UIMaxRes = WMCapture.CameraCaptureUIMaxPhotoResolution;
var totalPixels = targetWidth * targetHeight;
if (targetWidth == -1 && targetHeight == -1) {
maxRes = UIMaxRes.highestAvailable;
}
// Temp fix for CB-10539
/*else if (totalPixels <= 320 * 240) {
maxRes = UIMaxRes.verySmallQvga;
}*/
else if (totalPixels <= 640 * 480) {
maxRes = UIMaxRes.smallVga;
} else if (totalPixels <= 1024 * 768) {
maxRes = UIMaxRes.mediumXga;
} else if (totalPixels <= 3 * 1000 * 1000) {
maxRes = UIMaxRes.large3M;
} else if (totalPixels <= 5 * 1000 * 1000) {
maxRes = UIMaxRes.veryLarge5M;
} else {
maxRes = UIMaxRes.highestAvailable;
}
cameraCaptureUI.photoSettings.maxResolution = maxRes;
var cameraPicture;
// define focus handler for windows phone 10.0
var savePhotoOnFocus = function () {
window.removeEventListener("focus", savePhotoOnFocus);
// call only when the app is in focus again
savePhoto(cameraPicture, {
destinationType: destinationType,
targetHeight: targetHeight,
targetWidth: targetWidth,
encodingType: encodingType,
saveToPhotoAlbum: saveToPhotoAlbum
}, successCallback, errorCallback);
};
cameraCaptureUI.captureFileAsync(WMCapture.CameraCaptureUIMode.photo).done(function (picture) {
if (!picture) {
errorCallback("User didn't capture a photo.");
// Remove the focus handler if present
window.removeEventListener("focus", savePhotoOnFocus);
return;
}
cameraPicture = picture;
// If not windows 10, call savePhoto() now. If windows 10, wait for the app to be in focus again
if (navigator.appVersion.indexOf('Windows Phone 10.0') < 0) {
savePhoto(cameraPicture, {
destinationType: destinationType,
targetHeight: targetHeight,
targetWidth: targetWidth,
encodingType: encodingType,
saveToPhotoAlbum: saveToPhotoAlbum
}, successCallback, errorCallback);
}
}, function () {
errorCallback("Fail to capture a photo.");
window.removeEventListener("focus", savePhotoOnFocus);
});
}
require("cordova/exec/proxy").add("Camera",module.exports);
});
有谁知道如何在 Windows 中保持图像旋转？
最佳答案
在您的 CameraProxy.js 中更改 orientationToRotation 函数行号 569。
case Windows.Devices.Sensors.SimpleOrientation.notRotated:
if (cameraDirection == 0) {
return Windows.Media.Capture.VideoRotation.clockwise90Degrees;
}
else {
return Windows.Media.Capture.VideoRotation.clockwise270Degrees;
}
有关更多信息，您可以引用此 Solution
关于windows - 拍摄人像照片时图像旋转 90 度，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/46235156/