wgpu-native VS gpuweb

The Mach engine project has prebuilt Dawn libraries and also a simplified build-from-source process using the Zig build system, see:

https://machengine.org/pkg/mach-gpu-dawn/

It's also possible to use wgpu-native in C/C++ projects as prebuilt library, see:

https://github.com/gfx-rs/wgpu-native

It is based on the wgpu-native implementation (Firefox backend) but I plan on adding a receipe for using it with Dawn (Chrome backend) as well.

go-webgpu provides binding for wgpu-native (a safe and portable GPU abstraction in Rust, implementing WebGPU API).

Rust, C++

When you look at graphics APIs in Rust practically everything is pointing towards, and telling you to use, wgpu, which abstracts over Vulkan, Metal, DX11/12, GLES and WebGPU and is based on, drumroll, WebGPU. Hardly surprising as it's the backend firefox is going to use. And yes it has a C API, too.

Probably the easiest option would be to target wgpu-native prebuilt binaries but these don't have iOS/Android (unsure if wgpu-native supports iOS/Android at all)

WGPU is the underlying implementation for WebGPU in Firefox and it has C bindings: https://github.com/gfx-rs/wgpu-native.git.

People keep spreading this incredibly misleading statement, and yours is even more misleading (suggesting Apple opposed a 'GPU WASM')

By all accounts, Apple's /only/ stance was that if WebGPU used SPIR-V it would be a non-starter for them, due to ongoing legal issues between Apple and Khronos.

Apple actually proposed WebHLSL in collaboration with Microsoft, to have HLSL be the standard.

Mozilla employee's stance[0] was that SPIRV was too low level, did not fit with the goals of WebGPU portability and security, and expressed concern that Khronos may add functionality to SPIRV they cannot support in WebGPU like raytracing instructions .. 'So we'd always be on the verge of forking SPIR-V in some way.'

It was also noted by many people that even if a bytecode format was used, it would still have to be translated to the target (HLSL/DXIL, MSL, etc.) in almost the same way a text format would.

Nobody proposed a 'GPU WASM equivalent' or an alternative bytecode format.

The hard truth is that shader compilation is a fucking nightmare, people do not realize how bad it is across the different native APIs. SPIR-V is good, but it doesn't solve that - and presents other challenges if you are a web browser API. Vulkan and SPIRV are not the golden goose many make them out to be.

[0] https://github.com/gpuweb/gpuweb/issues/847#issuecomment-642...

Yes it is still a bit new. WebGPU is not finished and is still being worked on: https://webgpu.io/

WebGPU currently doesn't support the "bindless" resource access model (see: https://github.com/gpuweb/gpuweb/issues/380).

The "max number of sampled texture per shader stage" is a runtime device limit, and the minimal value for that seems to be 16. So texture atlasses are still a thing in WebGPU.

There's even an implementation under discussion to have the dp4a instruction added to WebGPU (https://github.com/gpuweb/gpuweb/issues/2677)