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https://issues.apache.org/jira/browse/CB-12512?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15886592#comment-15886592
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Kerri Shotts commented on CB-12512:
-----------------------------------
1. Why are you using PNGs? These are horrible for photographs -- they take up a
large amount of memory and do not compress well.
2. Make sure you use the correct preamble for the image type;
data:image/png;base64 is not appropriate for JPEGs (and vice versa).
3. Do you need the full-resolution image taken? If not, set the {{targetWidth}}
and {{targetHeight}} options to a reasonable value. The smaller the image you
request, the smaller the resulting DATA_URL will be (and thus, the faster the
image can be rendered). You do not need to worry about aspect ratio; the
returned image will fit within the width & height specified.
> No way to get from a FILE_URL to a DATA_URL onsuccess
> -----------------------------------------------------
>
> Key: CB-12512
> URL: https://issues.apache.org/jira/browse/CB-12512
> Project: Apache Cordova
> Issue Type: Bug
> Components: Android, iOS
> Environment: Android 4.0+ / iOS 9.0+
> Reporter: Kyle Slack
>
> The onsuccess function of the getPicture method uses the FILE_URI to set an
> <img> source perfectly fine, however, the conversion of this FILE_URI to get
> the image data or DATA_URL is never successful no matter the means attempted.
> Even utilizing your posted methods to get the actual file have failed:
> window.resolveLocalFileSystemURL(imgUri, function success(fileEntry) - is not
> getting to the image, always results in null DATA_URL in the end.
> Our method using FILE_URI:
> {code}
> navigator.camera.getPicture(function (data) {
> setTimeout(function () {
> StatusBar.overlaysWebView(true);
> setTimeout(function () {
> StatusBar.overlaysWebView(false);
> }, 250);
> }, 250);
> viewModel.txtImageStatus("Loading...");
> document.getElementById("image").src = data;
> viewModel.showNoImage(false);
> document.getElementById("image").style.display = "block";
> SavetoShipment(data);
> }, function (msg) {
> if (!msg == "Camera cancelled.") {
> viewModel.popVisible(true);
> viewModel.popMessage("Failed: " + msg);
> };
> setTimeout(function () {
> StatusBar.overlaysWebView(true);
> setTimeout(function () {
> StatusBar.overlaysWebView(false);
> }, 250);
> }, 250);
> }, {
> quality: DevExpress.devices.real().platform == "ios" ? 50 : 100,
> destinationType: Camera.DestinationType.FILE_URI,
> saveToPhotoAlbum: false,
> correctOrientation: true,
> encodingType: DevExpress.devices.real().platform == "ios" ?
> Camera.EncodingType.PNG : Camera.EncodingType.JPEG
> });
> function SavetoShipment(fileURI) {
> var fileReader = new FileReader();
> fileReader.onload = function (fileLoad) {
> viewModel.shipment.CustomerPhotoInfo = fileLoad.target.result;
> };
> fileReader.readAsDataURL(fileURI);
> }
> {code}
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