Fontrendering

[FabianWildgrube]

Adds an experiments folder with a standalone native app that tests rendering of text on the GPU.

See detailed explanation and a first benchmark here.

This PR is not finished, rather opened as a draft for visibility purposes.

Open Issues include:

• overlapping text "cancels" each other out, due to trick in fragment shader
• Glyphs are "tesselated" and drawn naively (i.e. each gets their own buffer, each gets a single draw call)
• Only tesselate each glyph once
• Draw instanced
• Enable styling (e.g. colors for a start)

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This experiment could also be refactored to abstract the boilerplate code for the standalone winit/wgpu application away, so that that can be reused for other experiments (if we don't want to always work with the full maplibre-rs project as the basis)

[FabianWildgrube]

Current status: Instances Rendering with support for per-word colors (This frame took 8ms rendering time on M1 Macbook Pro)

[maxammann]

Worth checking out: https://github.com/yeslogic/allsorts

[maxammann]

@FabianWildgrube Hi! Are you still interested in pushing this forward? I think this approach is still very nice, though there were some limitations I don't remember right now.

[FabianWildgrube]

Hi @maxammann - I still think it's an interesting and fun problem to look at. But realistically I'm not going to get to it because of work and other obligations 😞

[maxammann]

Hi @maxammann - I still think it's an interesting and fun problem to look at. But realistically I'm not going to get to it because of work and other obligations 😞

Yeah same here :) no worries!