HTML `<canvas>` Not Rendering Correctly on High-DPI Displays When Scaling
I'm integrating two systems and I tried several approaches but none seem to work... Hey everyone, I'm running into an issue that's driving me crazy. I'm working with an scenario with rendering on the `<canvas>` element in my HTML5 application. On high-DPI displays (like Retina displays), the graphics rendered on the canvas appear blurry and pixelated. I’m using a standard setup with the following code to create and draw on the canvas: ```html <canvas id="myCanvas" width="800" height="600"></canvas> <script> var canvas = document.getElementById('myCanvas'); var ctx = canvas.getContext('2d'); ctx.fillStyle = 'red'; ctx.fillRect(10, 10, 100, 100); </script> ``` When I test this on my MacBook Pro, the rectangle appears fuzzy compared to when I view it on a standard display. I’ve tried adjusting the `width` and `height` attributes of the `<canvas>` element, as well as setting the CSS styles to match, but that didn’t help. Here’s what I’ve tried: - Using CSS to set the canvas size to match the pixel density: ```css #myCanvas { width: 800px; height: 600px; } ``` - Setting the canvas dimensions programmatically based on the device pixel ratio: ```javascript var ratio = window.devicePixelRatio || 1; canvas.width = 800 * ratio; canvas.height = 600 * ratio; ctx.scale(ratio, ratio); ``` Despite implementing this, the rendering still appears off, especially when I enlarge the canvas or draw more complex shapes. I’m currently testing this on Chrome 93, and I have no errors in the console. Is there something specific I should be aware of regarding the pixel ratio and scaling in HTML `<canvas>`? Any best practices to ensure crisp rendering on all displays would be greatly appreciated. This is part of a larger service I'm building. Any help would be greatly appreciated! My development environment is macOS. I'd really appreciate any guidance on this. This is happening in both development and production on Debian. I appreciate any insights! The project is a desktop app built with Html. Any feedback is welcome!