don't need half on gpu

Author: schell

crates/renderling/Cargo.toml

@@ -47,7 +47,6 @@ spirv-std = { version = "0.9" }
 # dependencies for GPU code
 [target.'cfg(target_arch = "spirv")'.dependencies]
 crabslab = { workspace = true, features = ["glam"]  }
-half = { version = "2.3", default-features = false }
 glam = { workspace = true, default-features = false, features = ["libm"] }
 
 # dependencies for CPU code

crates/renderling/src/color.rs

@@ -16,6 +16,7 @@ pub fn linear_xfer_u16(c: &mut u16) {
     *c = ((*c as f32 / 65535.0).powf(2.2) * 65535.0) as u16;
 }
 
+#[cfg(not(target_arch = "spirv"))]
 pub fn linear_xfer_f16(c: &mut u16) {
     let mut f = half::f16::from_bits(*c).to_f32();
     linear_xfer_f32(&mut f);