Emscripten: replace USE_WEBGPU to emdawnwebgpu in wgpu-backend

[kassane]

References

• Wasm-build improvements #72
• Port WebGPU backend to emdawnwebgpu sokol#1272
• Fixes for emdawnwebgpu sokol#1283
• Deprecate -sUSE_WEBGPU in favor of --use-port=emdawnwebgpu emscripten-core/emscripten#24220

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Edit: in clear example test

[kassane]

this commit 5773016 show ✔️ for wgpu examples (-sUSE_WEBGPU=1)

[floooh]

FYI: I'll start working on the emdawnwebgpu stuff today, this will require changes in the WebGPU backend code both in sokol_app.h and sokol_gfx.h.

[kassane]

FYI: I'll start working on the emdawnwebgpu stuff today, this will require changes in the WebGPU backend code both in sokol_app.h and sokol_gfx.h.

Ok. If you need to modify this branch, feel free.
If you need my help with D, just mention me!

[floooh]

FYI this is how I changed the sokol-zig build process to support emdawnwebgpu.

There needs to be a separate build step which runs the cmdline tool embuilder build emdawnwebgpu which needs to run after the Emscripten SDK setup and before the Sokol C library compilation:

https://github.com/floooh/sokol-zig/pull/120/files#diff-f87bb3596894756629bc39d595fb18d479dc4edf168d93a911cadcb060f10fcc

...I'm not planning to do changes to the D build system, I guess WebGPU usage is currently unlikely, and I don't want to wait with the merge much longer.

[kassane]

There needs to be a separate build step which runs the cmdline tool embuilder build emdawnwebgpu which needs to run after the Emscripten SDK setup and before the Sokol C library compilation[...]

Ok. I see your question in wasm-discord group about.

[...]I'm not planning to do changes to the D build system, I guess WebGPU usage is currently unlikely, and I don't want to wait with the merge much longer.

Really? Ok, don't worry.
Dawn replace -sUSE_WEBGPU. However, TBD date to remove deprecated -sUSE_WEBGPU. (in emscripten-core/emscripten#24265)

I also had (like you) trouble building for WebGPU after the backend flag was missing during the last builder transition PR (fixed in 18d0271).
Now, that I have Chromium¹ installed, I'll run some tests.

Footnotes

1. I have only used Firefox for over 15 years! 🦊 ↩

[kassane]

chromium test

[floooh]

The build script changes look good to me.

I now also merged all the upstream MRs.

I guess the easiest way to resolve the conflicts is to run python3 gen_all.py in the sokol repository to overwrite the C headers.