Function bloom_load_shader

native/macos/src/lib.rs:1530–1533

(source_ptr: *const u8)

#[no_mangle]
pub extern "C" fn bloom_load_shader(source_ptr: *const u8) -> f64 {
    let source = str_from_header(source_ptr);
    engine().renderer.load_custom_shader(source) as f64
}

// ============================================================
// Phase 1c — material system FFI