todataurl

I'm attempting to merge two HTML canvases into a single canvas and then download that as an image. My code is as below: function downloadCanvas() { var bottleCanvas = document.getElementById('bottleCanvas'); var designCanvas = document.getElementById('editorCanvas'); var bottleContext = bottleCanvas.getContext('2d'); bottleContext.drawImage(designCanvas, 69, 50); var dataURL = bottleCanvas.toDataURL("image/png"); var link = document.createElement('a'); link.download = "bottle-design.png"; link.href = bottleCanvas.toDataURL("image/png").replace("image/png", "image/octet-stream"); link.click();

I have the problem with saving photo with CanvasRenderingContext2D.filter. When I connect to video and try to take a shot without any filters, it saves normally. However, after adding some filters to canvas, it is saving as HTM file or return previous photo without filters if it was made. The weird is, that while downloading that screenshot manually by clicking on it, it does have own toDataUrl, downloads normally and contains filter but while saving it using toDataUrl, it still doesn't see that picture. What should I do to save photos with these filters? Here is the piece of my code: var

I am trying to create an image using DataURL of a Canvas (using JavaScript). When a user hits submit, the value gets sent to an Input type text tag (e.g., <input type='text'> ), however, apparently on Chrome, the text gets cut off when it is at length 524,288 characters. I am sending it to an input tag because I need to obtain the value in PHP (as a $_POST['dataurltext'];), so that I can create an image and upload it to my web server. Any ideas on how to bypass this length? Should I use a comment box instead, maybe? Thank you for any help, it will be greatly appreciated. Try sending canvas as

I am getting frames from canvas through canvas.getDataURL() . However, now I have an array of png images, but I want a video file. How do I do this? var canvas = document.getElementById("mycanvaselementforvideocapturing"); var pngimages = []; ... setInterval(function(){pngimages.push(canvas.toDataURL())}, 1000); For a full browser support way, you'll have to send your image batch to the server then use some server-side program to do the encoding. FFmpeg might be able to do it. But in newest browsers the canvas.captureStream method, has been implemented. It will convert your canvas drawings to

I'm using javascript and html canvas to resize jpeg images. After resizing, I use canvas.toDataURL as the href attribute in an anchor tag in order to provide a link where users can download the resized images. This works nicely up to a certain image size. It seems that different browsers have different limits on the size of data urls as mentioned here: https://developer.mozilla.org/en-US/docs/Web/HTTP/data_URIs In chrome, when I'm over the data url size limit, nothing happens when I click on the download link; no errors or anything (as far as I can tell). Is there a some way to

I'm using glfx.js to edit my image but when I'm trying to get that image's data using the toDataURL() function I get a blank image (width the same size as the original image). The strange thing is that in Chrome the script works perfect. What I want to mention is that the image is loaded in canvas using the onload event: img.onload = function(){ try { canvas = fx.canvas(); } catch (e) { alert(e); return; } // convert the image to a texture texture = canvas.texture(img); // draw and update canvas canvas.draw(texture).update(); // replace the image with the canvas img.parentNode.insertBefore