rust-gpu CLI driver

Last update: Feb 16, 2024

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Overview

rust-gpu-driver

Experiment to make rust-gpu more accessible as a GPU shading language in various projects.

DISCLAIMER: This is an unstable experiment - use at your own risk and expect things not working and breaking over time.

Installation from homebrew

Currently Linux x86-64 and macOS aarch64 binaries can be installed using Homebrew on macOS and Linux:

$ brew install fornwall/tap/rust-gpu

Windows users can use the Linux package through WSL for now.

Usage

With a rust-gpu shader file shader.rs such as:

#![no_std]
use spirv_std::spirv;
use spirv_std::glam::{vec4, Vec4};

#[spirv(fragment)]
pub fn main_fs(output: &mut Vec4) {
    *output = vec4(1.0, 0.0, 0.0, 1.0);
}

Build a shader.spv file from it using:

$ rust-gpu shader.rs

The -o/--output option can be used to specify the path:

$ rust-gpu -o build/output.spv shader.rs
$ rust-gpu -o - shader.rs | spirv-dis

Dependencies can be specified in the script using the cargo-script syntax with an embedded part of the manifest:

//! ```cargo
//! [dependencies]
//! either = { version = "1", default-features = false }
//! ```
#![no_std]

use spirv_std::glam::{vec4, Vec4};
use spirv_std::spirv;
use either::Either;

#[spirv(fragment)]
pub fn main_fs(output: &mut Vec4) {
    let e: Either<f32, f32> = Either::Left(12.0);
    *output = vec4(e.left().unwrap_or(0.0), 2.0, 0.0, 1.0);
}

SPIR-V targets

A SPIR-V target can be specified using -t/--target (default value: spirv-unknown-vulkan1.1):

$ rust-gpu -t spirv-unknown-vulkan1.2 shader.rs

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