BMP image is here: https://www.filepicker.io/api/file/fdsYv4NSaCGUefBAQmER
And the code to reproduce the failure:
var fpfile = { url: 'https://www.filepicker.io/api/file/fdsYv4NSaCGUefBAQmER',
filename: 'customers.jpg', mimetype: 'image/jpeg', isWriteable: false, size: 629454};
console.log("Converting...");
/*an element where we can display the resulting image*/
var result = document.getElementById("convert-result");
filepicker.convert(fpfile, {width: 200, height: 200},
function(new_FPFile){
console.log(new_FPFile.url);
result.src = new_FPFile.url;
}
);
Unclear what I am doing wrong here, any help would be most appreciated.
thanks
We don't currently support .bmp's for conversion, but we're in the process of adding it.
Related
image of the image when print
I want to print image in 80mm wifi/printer image come from API as string.
Some of the images print correctly and some do not.
My code:
void testReceipt(NetworkPrinter printer, String img) async {
Uint8List unit8List = base64Decode(img);
Image? a = decodeImage(unit8List);
print(decodeImage(unit8List));
printer.image(a!, align: PosAlign.center);
printer.cut();
}
I Solved it by change the width of the image
Uint8List unit8List = base64Decode(img);
image.Image? a = image.decodeImage(unit8List);
image.Image resized = image.copyResize(a!, width: 600, height: a.height);
printer.image(resized, align: PosAlign.center);
printer.cut();
How can i convert a https://graph.microsoft.com/v1.0/me/photo/$value response with Angular9 to an image
enter image description here
because the image returned is a binary representation of the image, you would need to convert it to read it.
Here's an example of it for angular.
var imageUrl = 'data:image/*;base64,' + res.data;
This project is an example of how to use graph with angular which displays the users information. the link goes directly to the little section about the image conversion.
https://github.com/OfficeDev/O365-Angular-Microsoft-Graph-Profile/blob/7ed7e89a03525fa79b9d6bed7fb17d257a4c9ff2/app/controllers/mainController.js#L120
getProfileImg() {
this.http
.get('https://graph.microsoft.com/v1.0/me/photos/48x48/$value', {
headers: { 'Content-Type': 'image/*' },
responseType: 'arraybuffer',
})
.toPromise()
.then(
(data) => {
const TYPED_ARRAY = new Uint8Array(data);
// converts the typed array to string of characters
const STRING_CHAR = String.fromCharCode.apply(null, TYPED_ARRAY);
//converts string of characters to base64String
let base64String = btoa(STRING_CHAR);
//sanitize the url that is passed as a value to image src attrtibute
this.profileImg = this.sanitizer.bypassSecurityTrustUrl(
'data:image/*;base64, ' + base64String
);
console.log(this.profileImg);
},
(err) => {
this.profileImg = '../../assets/img/account_circle-black-48dp.svg';
}
);
}
This worked for me.
as the user is already logged in, i Just used the getProfileImg() and was able to get the image from AD Profile.
I applied Css as per my image need and that worked.
Thank you!
I have two buttons, the first one for browse image from gallery and the second one for taking photo. I'm using cordova camera plugin for two cases.
After choosing an image, I want to crop it before to send to server using cordova file transfer plugin. I've tried to use several plugins such as jr-crop, angular-image-crop, ngImgCrop. The problem is that plugins returns a base64 image, but I want to get the image url (not dataUrl). Any help please !
My solution (#egycode) :
$scope.image_gallery = function() {
var options = {
quality: 100,
correctOrientation: true,
sourceType: 0
};
$cordovaCamera.getPicture(options).then(function(data) {
console.log(data);
$scope.crop(data);
console.log('camera data image_gallery: ' + angular.toJson(data));
}, function(error) {
console.log('camera error image_gallery: ' + angular.toJson(error));
});
}
$scope.crop = function(url) {
$jrCrop.crop({
url: url,
width: 261,
height: 362
}).then(function(canvas) {
console.log(canvas);
var image = canvas.toDataURL();
//var image is the result, you can show it using : $scope.pictureUrl = image;
}, function() {
// User canceled or couldn't load image.
});
}
I'm trying to combine jcrop and scrimage but I'm having trouble in understanding
the documentation of scrimage.
The user uploads an image. When the upload is done the user is able choose a fixed
area to crop with Jcrop:
upload.js
$(function () {
$('#fileupload').fileupload({
dataType: 'json',
progress: function (e, data) {
var progress = parseInt(data.loaded / data.total * 100, 10);
$("#progress").find(".progress-bar").css(
"width",
progress + "%"
);
},
done: function (e, data) {
$("#cropArea").empty();
var cropWidth = 210;
var cropHeight = 144;
if(data.result.status == 200) {
var myImage = $("<img></img>", {
src: data.result.link
}).appendTo('#cropArea');
var c = myImage.Jcrop({
allowResize: false,
allowSelect: false,
setSelect:[0,0,cropWidth,cropHeight],
onSelect: showCoords
});
}
}
});
});
Example:
When the user is satisfied the coordinates will be posted to the server and there is where the magic should happen.
Controller:
def uploadFile = Action(multipartFormDataAsBytes) { request =>
val result = request.body.files.map {
case FilePart(key, filename, contentType, bytes) => {
val coords = request.body.dataParts.get("coords")
val bais = new ByteArrayInputStream(bytes)
Image(bais).resize(magic stuff with coords)
Ok("works")
}
}
result(0)
}
If i read the docs for scrimage and resize:
Resizes the canvas to the given dimensions. This does not scale the
image but simply changes the dimensions of the canvas on which the
image is sitting. Specifying a larger size will pad the image with a
background color and specifying a smaller size will crop the image.
This is the operation most people want when they think of crop.
But when trying to implement resize with an inputstream Image(is).resize() I'm not sure I how should do this. Resize takes a scaleFactor, position and color... I guess I should
populate the position with the coords I get from jcrop??, and what do I do with the scaleFactor? Anybody got a good example of how to do this this?
Thank you for two great libs!
Subimage is what you want. That lets you specify coordinates rather than offsets.
So simply,
val image = // original
val resized = image.subimage(x,y,w,h) // you'll get these from jcrop somehow
I'm trying to take a screenshot using html2canvas:
var body = document.getElementById("body")
$(body).html2canvas({onrendered: function( canvas ) {
var urlData = canvas.toDataURL("image/jpeg");
}});
My body's background is transparent, and therefore urlData because of jpeg has black background (not white like in browser).
How can I fix this behavior and make background color white in this case?
I modified temporary: _html2canvas.Util.isTransparent from
_html2canvas.Util.isTransparent = function(backgroundColor) {
return (backgroundColor === "transparent" || backgroundColor === "rgba(0, 0, 0, 0)");
};
to
_html2canvas.Util.isTransparent = function(backgroundColor) {
return (backgroundColor === "transparent" ||
backgroundColor === "rgba(0, 0, 0, 0)" ||
backgroundColor === undefined);
};
and after that it was enough to call html2canvas with background parameter set:
html2canvas(screenshotElement, {
background: '#FFFFFF',
onrendered: function (canvas) {
// ...
}
});
For me... it makes sense to consider transparent a background that is undefined.
Try this
var body = document.getElementById("body")
$(body).html2canvas({background:'#fff', onrendered: function( canvas ) {
var urlData = canvas.toDataURL("image/jpeg");
}});
I'd say, it's even simplier now(30/05/18) - just pass backgroundColor: null in html2canvas options:
html2canvas(
document.querySelector("#some-id-to-export"),
{backgroundColor: null}
).then(canvas => {$("#id-to-render-transparent-bg-img").html(canvas);});
https://stackoverflow.com/a/23928038/1815624
simply add css background-color:#ffffff to your table :)
hope this helps
I wrapped the content into a div for each desired page and gave class="pdfpage" then set the css as pdfpage{background:#FFFFFF;}
As I had commented it was not first thoughts that I needed to set the background of the rendered element as white since it was white already...But in truth it was colorless...
var body = document.getElementById("body")
$(body).html2canvas({onrendered: function( canvas ) {
var urlData = canvas.toDataURL("image/jpeg");
},
background: '#fff'});
Two years later but updated version should accept a parameter like this . . .
No worries, Now just add background: '#FFFFFF' , its working fine
html2canvas(element, {
background: '#FFFFFF',
onrendered: function (canvas) {
$("#previewImage").append(canvas);
getCanvas = canvas;
}
});
If you need the actual image data to be non-transparent, use fillRect(0, 0, width, height) with fillStyle 'white'.
Another way to do it but it's quite slow (few milliseconds maybe), is to use getImageData and putImageData and iterate threw each pixel to check rgba values and change them
html2Canvas and ngxcharts teams seem to have closed the bugs on this issue without providing any solution.
Setting up fill property for rect via css classes didn't work.
This is how I ended up solving it, surprisingly it works:
let rectElements = Array.from(document.getElementsByTagName('rect'));
if (rectElements.length > 0) {
rectElements.forEach(rect => {
rect.setAttribute('fill', '#ffffff');
});
}