vello_sparse_shaders 0.0.8

Provide compilation of wgsl to glsl to support the WebGL `vello_hybrid` backend.
Documentation 
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// Copyright 2026 the Vello Authors
// SPDX-License-Identifier: Apache-2.0 OR MIT

//! Generate local WebGL GLSL outputs for `vello_sparse_shaders`.

#[cfg(feature = "glsl")]
mod compile;
#[cfg(feature = "glsl")]
mod shader_info;
#[cfg(feature = "glsl")]
mod types;

#[cfg(feature = "glsl")]
fn main() {
    let manifest_dir = std::path::PathBuf::from(env!("CARGO_MANIFEST_DIR"));
    let output_dir = manifest_dir.join("generated_glsl");
    std::fs::create_dir_all(&output_dir).unwrap();

    let shader_infos = shader_info::load_shader_infos(&manifest_dir.join("shaders")).unwrap();

    for shader_info in shader_infos {
        let shader = compile::compile_wgsl_shader(&shader_info.wgsl_source, "vs_main", "fs_main");
        std::fs::write(
            output_dir.join(format!("{}.vert.glsl", shader_info.name)),
            shader.vertex.source,
        )
        .unwrap();
        std::fs::write(
            output_dir.join(format!("{}.frag.glsl", shader_info.name)),
            shader.fragment.source,
        )
        .unwrap();
    }
}

#[cfg(not(feature = "glsl"))]
fn main() {
    panic!("enable the `glsl` feature to generate local WebGL GLSL outputs");
}