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ableos/shadeable/src/lib.rs

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Rust

#![no_std]
extern crate alloc;
use alloc::boxed::Box;
use engine_internals::engine_startup;
use pixel_format::Rgba64;
// use core::fmt::Result;
use core::result::Result;
use rhai::{EvalAltResult, Scope};
mod engine_internals;
pub mod pixel_format;
pub const SHADER: &str = include_str!("../shaders/simple.shade");
pub fn evaluate_shader(x: usize, y: usize, pixel: Rgba64) -> Result<Rgba64, Box<EvalAltResult>> {
let engine = engine_startup();
let ast = engine.compile(SHADER)?;
let mut scope = Scope::new();
scope.push("PIXEL_RGBA", pixel);
scope.push("PIXEL_X", x);
scope.push("PIXEL_Y", y);
let result: Rgba64 = engine.call_fn(&mut scope, &ast, "main", ())?;
Ok(result)
}