getImageData | Cross domain getImageData work around and jQuery plugin | Crawler library

Best way is to take a look at existing sulu entities with tags e.g. Account or Contact.

The property can be implemented like this:

(Answer courtesy @CBroe & @KenHerbert)

Brave applies some small, repeatable randomizations to "the output of semi-identifying browser features" to defeat fingerprinting efforts. They call this farbling.

Observable behavior (from that link):

• a site will get the exact same value each time it tries to fingerprint within the same session
• different sites will get different values
• the same site will get different values on the next session

Farbling is applied to these canvas capabilities:

• getImageData
• measureText
• isPointInPath
• isPointInStroke
• toDataURL
• toBlob

You should use console.log. You should also be getting an error that helps identify your issue when you run the script.

Check this line in undo_last

Here is how I would draw the graph. I have removed all of the other functions from this so it is only showing the graph progress based on what you set the variables to. Once you get your other functions figured out you can updated them via that method.

First I would get the canvas at the beginning of the script and also designate the variables a global.

Second I would draw the white doughnut flat out. Unless you plan on changing it in some way the function drawGraph() will get called once and that's it.

Third the function drawRingProgress() will get called from your other functions when you add, delete, or complete a task. Be sure those function also update pendingTasks and completedTasks prior to calling drawRingProgress().

Inside drawRingProgress() I added the text since canvas has that built in method so you don't need to use a . As far as all your options I removed them for this but you can add them back as where you see fit.

I don't have time to work through your code, so my answer is going to be general:

When your table view/collection view displays data that has to be fetched over the network, load that data into your data model, not into cells. When the network load completes and that entry in the model is updated, tell the corresponding cell to reload.

If you load data into your cells, as you scroll, the data you loaded before will be lost, and if you scroll back, you'll have to load it again. Ideally, save you loaded data to files in the caches directory so it will still be available if the user closes the view controller and then reopens it.

If you install downloaded data into your model then when you scroll away and scroll back the cell will render correctly as soon as it's displayed.

After reviewed your question, I did some R&D for the source URL which you have added the following is the possible solution to fetch images from the below URL.

Solution 1:

The below code is completely working fine, with the endless requests. I have reviewed the actual usda.gov site and review the headers and responses. I have used the Axios and verify that here the response received in-stream. I might not sure about canvas whether it will handle the stream response or not but, Axios works fine.

The reason to use Axios is that I have also tried with canvas somehow it failed to download an image. After studying the actual application and payload and tried with Axios which works fine and found most compatible.

I tried a lot of things and almost giveup, but at the end I had to change the code a bit and this worked for me. Although what I got was base64 url as Alice in the comment suggested and I converted it into Uint8ClampedArray. Now if anyone wants a full image or all the pixels of an image then they can follow this link :- https://developer.mozilla.org/en-US/docs/Web/API/Canvas_API/Tutorial/Pixel_manipulation_with_canvas . I hope it will be helpful for anyone who wants to make an offline webcanvas based application and don't want to dabble with CORS.

A few problems here:

• Your translate calls are not made properly, you are only translating back after you drew the image, which has no good effect.
• You never reset the transformation matrix after you set its scale, so at second call, your zoom canvas as its scale set to 4, at third, to 8 etc.

To workaround both these problems, you can use the absolute setTransform() method to set both the scale and the translate in one call, and then translate back using the drawImage's parameters:

You need to set the alpha to 255 or the canvas is just drawing something transparent, the data is a sequence of RGBA items

Your data output of [0, 0, 0, 0, 0, 0, 0, 0] can be represented as

Some good reading:

• https://developer.mozilla.org/en-US/docs/Web/API/Canvas_API/Tutorial/Pixel_manipulation_with_canvas
• https://developer.mozilla.org/en-US/docs/Web/API/ImageData

Here is your code but setting the alpha on the first pixel to 255