How to clear the canvas for redrawing
Given that canvas is a canvas element or an OffscreenCanvas object,
html5-canvas
HTML5 Canvas Rotate Image
You can use canvas’ context.translate & context.rotate to do rotate your image Here’s a function to draw an image that is rotated by the specified degrees: Here is code and a Fiddle: http://jsfiddle.net/m1erickson/6ZsCz/
How to fix getImageData() error The canvas has been tainted by cross-origin data?
My code is working very well on my localhost but it is not working on the site. I got this error from the console, for this line .getImageData(x,y,1,1).data: part of my code: Note: my image url (src) is from a subdomain url
Crop the image using JavaScript
In my Angular 6 application I am making a file upload option and in preview the uploaded file needs to be displayed with auto cropping and auto resizing. I have tried the following, HTML: File select functtion: In the above I have tried the following with the reference of link https://jsfiddle.net/8jwq3cs7/ Before using the canvas … Read more
Is there any reason for using WebGL instead of 2D Canvas for 2D games/apps?
Looking at this question from another side:how does a developer choose one technology over another? integrates better in their already built system is easier to use is faster has more capabilities or better suits their needs cost more platfrom-independant So I’ll discuss the differences between canvas and webGL APIs regarding these qualities. Both canvas and … Read more
Tainted canvases may not be exported
For security reasons, your local drive is declared to be “other-domain” and will taint the canvas. (That’s because your most sensitive info is likely on your local drive!). While testing try these workarounds: Put all page related files (.html, .jpg, .js, .css, etc) on your desktop (not in sub-folders). Post your images to a site … Read more
Resize image with javascript canvas (smoothly)
You can use down-stepping to achieve better results. Most browsers seem to use linear interpolation rather than bi-cubic when resizing images. (Update There has been added a quality property to the specs, imageSmoothingQuality which is currently available in Chrome only.) Unless one chooses no smoothing or nearest neighbor the browser will always interpolate the image after down-scaling it as this … Read more
How to clear the canvas for redrawing
Given that canvas is a canvas element or an OffscreenCanvas object,