Partial font texture update #1149
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emilk
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Jan 25, 2022
Since #1149 we only update the region of the font atlas that has changes, so loading new glyphs is much cheaper. This means warm-up is much less needed. There is now a small delay when opening the font book, but not when opening anything else.
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When a new character is rendered into the font atlas, only the changed region will now be uploaded to the GPU. This helps maintain a smoother framerate and better performance when entering uncached characters. It requires slightly more of the backend integrations, but not much (see the change to the glium/glow/webgl painters).