Webgpu text rendering

[sid597]

microsoft/vscode#221145

https://tchayen.com/drawing-text-in-webgpu-using-just-the-font-file

https://zed.dev/blog/videogame

Need to find the 80/20 for this problem

[sid597]

GPUI, the UI framework that powers Zed, is distributed under the Apache 2 license, so that you can use it to build high-performance desktop applications and distribute them under any license you choose.

• from https://zed.dev/blog/zed-is-now-open-source

[sid597]

There’s so much work involved in making a fully functional text input box that it is something of a litmus test for how far along a UI toolkit has gotten

https://raphlinus.github.io/rust/gui/2022/07/15/next-dozen-guis.html

[sid597]

Commit messages that might be helpful later:

instead of sdf I am using msdf, and shape-text based on that msdf, not sure if this will be supported in the harfbuzz later but works for now

The strategy is to rerender the whole frame on ever update, so here we are depending the upload vertices on both the initial cx and later one off-x so if either of these value's change we rerender the upload vertices. So when text renders we also render the vertices. THis is currently fast because font data cal is the bootleneck not the rendering of rects

#21 (comment)

better font rendering seems more crispier atleast at bigger size, still don't like it at smaller sizes, maybe try different width ttf this is ExtraLight

ids-array is a Uint instead of float, shader cant do atomic ops on a float

[sid597]

[sid597]

Spine only contains the elements present in the canvas view