main.rs

use spirv_builder::SpirvBuilder;
use std::env;
use std::error::Error;
use std::fs;
use std::path::{Path, PathBuf};

fn build_shader(path_to_crate: &str, codegen_names: bool) -> Result<(), Box<dyn Error>> {
    let path_to_crate = Path::new(env!("CARGO_MANIFEST_DIR")).join(path_to_crate);
    let mut builder = SpirvBuilder::new(path_to_crate, "spirv-unknown-vulkan1.1");
    builder.build_script.defaults = true;
    builder.build_script.env_shader_spv_path = Some(true);
    // Give this spirv-builder a unique target dir, so that rebuilding android and the main wgpu app's target dir
    // don't clash and break each other's incremental
    builder.target_dir_path = Some(PathBuf::from("example-runner-wgpu-builder"));
    let result = builder.build()?;
    if codegen_names {
        let out_dir = env::var_os("OUT_DIR").unwrap();
        let dest_path = Path::new(&out_dir).join("entry_points.rs");
        fs::create_dir_all(&out_dir).unwrap();
        fs::write(dest_path, result.codegen_entry_point_strings()).unwrap();
    }
    Ok(())
}

fn main() -> Result<(), Box<dyn Error>> {
    build_shader("../../../shaders/sky-shader", true)?;
    build_shader("../../../shaders/simplest-shader", false)?;
    build_shader("../../../shaders/compute-shader", false)?;
    build_shader("../../../shaders/mouse-shader", false)?;
    Ok(())
}