Crate spirv_std

spirv-std

Core functions, traits, and more that make up a “standard library” for SPIR-V for use in rust-gpu.

This crate gives a rust-gpu shader access to the required #![spirv(..)] attribute, as well as povide all kinds of APIs that allows a shader to access GPU resources such as textures and buffers. Optionally, through the use of the "glam" feature, it includes some boilerplate trait implementations to make glam vector types compatible with these APIs.

Example

Here is a small excerpt to see what a shader would look like. See source for full details of the shader that generates above image.

use spirv_std::spirv;
use glam::{Vec3, Vec4, vec2, vec3};

#[spirv(fragment)]
pub fn main(
    #[spirv(frag_coord)] in_frag_coord: &Vec4,
    #[spirv(push_constant)] constants: &ShaderConstants,
    output: &mut Vec4,
) {
    let frag_coord = vec2(in_frag_coord.x, in_frag_coord.y);
    let mut uv = (frag_coord - 0.5 * vec2(constants.width as f32, constants.height as f32))
        / constants.height as f32;
    uv.y = -uv.y;

    let eye_pos = vec3(0.0, 0.0997, 0.2);
    let sun_pos = vec3(0.0, 75.0, -1000.0);
    let dir = get_ray_dir(uv, eye_pos, sun_pos);

    // evaluate Preetham sky model
    let color = sky(dir, sun_pos);

    *output = tonemap(color).extend(1.0)
}

Getting started

Check out The rust-gpu Dev Guide for information on how to get started with using it in your projects.

Experiment with rust-gpu shaders in-browser at SHADERed.

Re-exports

• pub extern crate spirv_std_macros as macros;
• pub use byte_addressable_buffer::ByteAddressableBuffer;
• pub use num_traits;
• pub use glam;

Modules

• arch
  SPIR-V Instrinics
• byte_addressable_buffer
  Container for an untyped blob of data.
• float
  Traits and helper functions related to floats.
• image
  Image types
• integer
  Traits related to integers.
• memory
  Types for handling memory ordering constraints for concurrent memory access.
• number
  Traits and helper functions related to numbers.
• ray_tracing
  Ray-tracing data types
• scalar
  Traits related to scalars.
• vector
  Traits related to vectors.

Macros

• Image
  A macro for creating SPIR-V OpTypeImage types. Always produces a spirv_std::image::Image<...> type.
• ray_query
  Constructs an uninitialized ray query variable. Using the syntax let (mut)? <name>. Where name is the name of the ray query variable.

Structs

• RuntimeArray
  Dynamically-sized arrays in Rust carry around their length as the second half of a tuple. Unfortunately, sometimes SPIR-V provides an unsized array with no way of obtaining its length. Hence, this type represents something very similar to a slice, but with no way of knowing its length.
• Sampler
  An opaque reference to settings that describe how to access, filter, or sample an image.

Attribute Macros

• spirv
  Replaces all (nested) occurrences of the #[spirv(..)] attribute with #[cfg_attr(target_arch="spirv", rust_gpu::spirv(..))].