Re: [csswg-drafts] [resize-observer] why we need `ResizeObserver.takeRecords()` or `ResizeObserver.hasRecords()` (the canvas flickering problem) (#9717)

• From: Joe Pea via GitHub <sysbot+gh@w3.org>
• Date: Sun, 17 Dec 2023 22:58:41 +0000
• To: public-css-archive@w3.org
• Message-ID: <issue_comment.created-1859313670-1702853918-sysbot+gh@w3.org>

A solution [someone mentioned](https://stackoverflow.com/questions/15799564/flickering-during-resizing-of-html5-canvas) is to double buffer using two canvas (double the memory):

- after resize (f.e. in an RO callback) immediately write the other buffer back
- this is cheaper than re-rendering a whole 3D scene for example, but still has more overhead than ideal
- for one frame, the visual will be stretched or shrunk without further code

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Received on Sunday, 17 December 2023 22:58:43 UTC