Code:
var myCanvas = document.createElement('canvas');
myCanvas.width = 596;
myCanvas.height = 350;
var ctx = myCanvas.getContext('2d');
var img = new Image();
img.crossOrigin = "Anonymous";
img.src = url;
img.onload = function(){
ctx.drawImage(img,0,0);
};
let dt = myCanvas.toDataURL('image/jpg');
var aLink = document.createElement('a');
aLink.href = dt;
aLink.download = 'fixed_photo.jpg';
aLink.click();
Result:
It Downloads an empty Canvas instead of the image from the url. my guess it has something to do with s3 permission, i am using the getObject of S3 aws-sdk.
Try opening the developer tools in your web browser and check the network tab. It should let you know if the request failed and the status code.
Related
const arrUrl = [
'https://avatars.mds.yandex.net/getzen_doc/1714479/pub_5e4b9183baec8f365f1ff215_5e4b91c9bb4a6d368b8d9d4c/scale_1200',
'https://avatars.mds.yandex.net/getzen_doc/1714479/pub_5e4b9183baec8f365f1ff215_5e4b91c9bb4a6d368b8d9d4c/scale_1200',
'https://avatars.mds.yandex.net/getzen_doc/1714479/pub_5e4b9183baec8f365f1ff215_5e4b91c9bb4a6d368b8d9d4c/scale_1200',
'https://avatars.mds.yandex.net/getzen_doc/1714479/pub_5e4b9183baec8f365f1ff215_5e4b91c9bb4a6d368b8d9d4c/scale_1200'
];
there is an array of different links to photos, how to make them all in base64, I have a script that makes base64 photos, but I can't combine them
var img = new Image();
img.crossOrigin = 'Anonymous';
// The magic begins after the image is successfully loaded
img.onload = function () {
var canvas = document.createElement('canvas'),
ctx = canvas.getContext('2d');
canvas.height = img.naturalHeight;
canvas.width = img.naturalWidth;
ctx.drawImage(img, 0, 0);
// Unfortunately, we cannot keep the original image type, so all images will be converted to PNG
// For this reason, we cannot get the original Base64 string
var uri = canvas.toDataURL('image/png'),
b64 = uri.replace(/^data:image.+;base64,/, '');
console.log(b64); //-> "iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVQImWP4z8DwHwAFAAH/q842iQAAAABJRU5ErkJggg=="
};
// If you are loading images from a remote server, be sure to configure “Access-Control-Allow-Origin”
// For example, the following image can be loaded from anywhere.
var url = '//static.base64.guru/uploads/images/1x1.gif';
img.src = url;
or
https://gist.github.com/CawaKharkov/1c477d44fcfdf67aea3f/revisions#diff-7b3e9484330c338cea137079906c2390c4961003e07e3a9d13bed49d9d63805eR17
I've made a Chrome Extension that:
Takes a screenshot of a website, opens anew window, cuts the image using canvas, and downloads the image. Now I want to display the image so I create an image and set its path to file:///C:/Users/myuser/Downloads/myfile.png.
But the image doesn't show up. I tried removing the "file" or setting a timeout but nothing works, however when I click the image link in the dev console it takes me to the picture and it works.
Here's the code from ´background.js´:
chrome.browserAction.onClicked.addListener(function(tab) {
chrome.tabs.captureVisibleTab(null, {}, function(image){
var x = window.open();
var cv = x.document.createElement('canvas');
x.document.body.appendChild(cv);
var canvas = x.document.querySelector('canvas');
canvas.width = 928
canvas.height = 490;
var img = new Image();
var code = new Date().getTime();
img.onload = function(){
ctx.drawImage(this, 315, 138, 928, 490, 0, 0, 928, 490);
var toCopy = canvas.toDataURL("image/png");
var link = x.document.createElement('a');
link.download = code + '.png';
link.href = toCopy;
link.click();
setTimeout(function(){
var el = new Image();
el.src = 'file:///C:/Users/myuser/Downloads/'+code+'.png';
x.document.body.appendChild(el);
x.console.log(x.location);
}, 2000);
canvas.parentElement.removeChild(canvas);
}
img.src = image;
var ctx = canvas.getContext('2d');
});
});
I am trying to create new empty image with width and height and save it as png to file.
This is what i got:
var myImage = new Image(200, 200);
myImage.src = 'picture.png';
window.URL = window.webkitURL || window.URL;
var contentType = 'image/png';
var pngFile = new Blob([myImage], {type: contentType});
var a = document.createElement('a');
a.download = 'my.png';
a.href = window.URL.createObjectURL(pngFile);
a.textContent = 'Download PNG';
a.dataset.downloadurl = [contentType, a.download, a.href].join(':');
document.body.appendChild(a);
I am trying to get transparent image with given width and height in var myImage new Image(200, 200) as the output on the download.
The Image element can only load an existing image. To create a new image you will have to use canvas:
var canvas = document.createElement("canvas");
// set desired size of transparent image
canvas.width = 200;
canvas.height = 200;
// extract as new image (data-uri)
var url = canvas.toDataURL();
Now you can set url as href source for the a-link. You can specify a mime-type but without any it will always default to PNG.
You can also extract as blob using:
// note: this is a asynchronous call
canvas.toBlob(function(blob) {
var url = (URL || webkitURL).createObjectURL(blob);
// use url here..
});
Just be aware of that IE does not support toBlob() and will need a polyfill, or you can use navigator.msSaveBlob() (IE does neither support the download attribute so this will kill two birds with one stone in the case of IE).
Thank you K3N for replying to my question but i did not have time to wrap my head around your answer.
Your answer was just what i needed!
Here is what i got:
var canvas = document.createElement("canvas");
canvas.width = 200;
canvas.height = 200;
var url = canvas.toDataURL();
var a = document.createElement('a');
a.download = 'my.png';
a.href = url;
a.textContent = 'Download PNG';
document.body.appendChild(a);
var canvas = document.createElement("canvas");
canvas.width = 200;
canvas.height = 200;
var url = canvas.toDataURL();
var a = document.createElement('a');
a.download = 'my.png';
a.href = url;
a.textContent = 'Download PNG';
document.body.appendChild(a);
I have an image like this
<img id='my_img' src='www.someimage.com'>
And I have created this function to take the IMG node and convert it to a canvas and the base 64 data
function getBase64Image(img) {
var canvas = document.createElement("canvas");
canvas.width = img.width;
canvas.height = img.height;
var ctx = canvas.getContext("2d");
ctx.drawImage(img, 0, 0);
var dataURL = canvas.toDataURL("image/png");
return dataURL.replace(/^data:image\/(png|jpg|jpeg|pdf);base64,/, "");
}
The function is called like
getBase64Image(document.getElementById("my_img"));
But when I send a image, it just returns an image that is cliped, it only returns the top left corner of the image here is what it returns for this image
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
And this is the image
Why is the image that is returned being clipped?
I think that promises are useful in situations like these:
function getBase64Image(url) {
var promise = new Promise(function(resolve, reject) {
var img = new Image();
// To prevent: "Uncaught SecurityError: Failed to execute 'toDataURL' on 'HTMLCanvasElement': Tainted canvases may not be exported."
img.crossOrigin = "Anonymous";
img.onload = function() {
var canvas = document.createElement("canvas");
canvas.width = img.width;
canvas.height = img.height;
var ctx = canvas.getContext("2d");
ctx.drawImage(img, 0, 0);
var dataURL = canvas.toDataURL("image/png");
resolve(dataURL.replace(/^data:image\/(png|jpg|jpeg|pdf);base64,/, ""));
};
img.src = url;
});
return promise;
};
// CORS (Cross-Origin Resource Sharing) is enabled for Facebook images; but that's not true for
// all images out there!
var url = "https://scontent.xx.fbcdn.net/hphotos-xfp1/v/t1.0-9/12294845_10153267425828951_7985428593018522641_n.jpg?oh=2bb55736fce035311c3d60a1ca559426&oe=57210504";
var promise = getBase64Image(url);
promise.then(function (dataURL) {
console.log(dataURL);
});
https://jsfiddle.net/5tjov243/2/
Resources:
https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image
https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_settings_attributes
Make sure you are doing this after the image is fully loaded, and I don't know why you are doing the regex at the end, it works fine for me without it.
img.onload = function() {
res = getBase64Image(img);
document.getElementById('result').src = res;
};
http://jsfiddle.net/z0phwzea/1/
Of course you will need to try the fiddle out on your own computer as it won't work with an external resource.
I am trying to generate a PDF from HTML using jspdf plugin. I am stuck with loading Images into PDF. There is a function addImage() in plugin which takes base64 encoding of an image, but converting an image to base64 is not working.
I have used below two ways
//Create canvas, draw image in context and get the data url
imgToDataURL = function (img, outputFormat){
var canvas = document.createElement('canvas');
canvas.width = 20;
canvas.height = 20;
var c = canvas.getContext('2d');
c.height = img.height;
c.width=img.width;
c.drawImage(img, 0, 0);
c.save();
var dataurl = canvas.toDataURL(outputFormat);
return dataurl;
}
var img = new Image();
img.crossOrigin = 'Anonymous';
img.src = "image path"
img.height= 60;
img.width=60;
var dataURL = this.imgToDataURL(img,"image/jpeg");
renderer.pdf.addImage(dataURL, 'png',x+padding,y + this.internal.getLineHeight(),imageWidth,imageHeight);
This is printing wrong dataURL I am getting a white image. If I hard code the base64 code i.e return a hardcoded dataURL then addImage works fine. So the issue is with canvas.toDataURL which is giving me wrong output
this is the 2nd way
convertImgToBase64URL = function (url, callback, outputFormat){
var img = new Image();
img.crossOrigin = 'Anonymous';
img.onload = function(){
var canvas = document.createElement('CANVAS'),
ctx = canvas.getContext('2d'), dataURL;
canvas.height = this.height;
canvas.width = this.width;
ctx.drawImage(this, 0, 0);
dataURL = canvas.toDataURL(outputFormat);
callback(dataURL);
canvas = null;
};
img.src = url;
}
this.convertImgToBase64URL("Image Path",function(base64){
renderer.pdf.addImage(base64, 'PNG', 20, 20,48,48);
})
I have run this inside a javascript and the onload function is not even running I am not sure what is my mistake is.
Please suggest me what mistake I am doing in either way
In the first you missed assigning an onload function to your image. For that reason, the moment you try to create the dataURL, the image might not be loaded yet, ergo, the blank image. You could try changing the last few lines to this:
...
img.width=60;
img.onload = function () {
var dataURL = this.imgToDataURL(img,"image/jpeg");
renderer.pdf.addImage(dataURL, 'png',x+padding,y + this.internal.getLineHeight(),imageWidth,imageHeight);
}
img.src = "image path";
As for the second one, there seems to be a problem with the convertImgToBase64URL() which accepts 3 parameters, but you are passing 2. In you example, outputFormat parameter is undefined.