Move CorrectedRgb into crate root & rename it to HardwareRgb

gemma_m0_lights/src/lib.rs

@@ -15,11 +15,11 @@ use hal::{
     Peripherals
 };
 use lights::{
-    gamma::CorrectedRgb,
+    HardwareRgb,
     Lights
 };
 
-pub fn boot() -> impl Lights<Pixel = CorrectedRgb> {
+pub fn boot() -> impl Lights<Pixel = HardwareRgb> {
     let mut peripherals = Peripherals::take().unwrap();
     let _clock = GenericClockController::with_internal_32kosc(
         peripherals.GCLK,
@@ -69,10 +69,10 @@ impl<T: OutputPin> NeopixelLights<T> {
 }
 
 impl<T: OutputPin> Lights for NeopixelLights<T> {
-    type Pixel = CorrectedRgb;
+    type Pixel = HardwareRgb;
 
     #[inline]
-    fn render(&mut self, rgb: &CorrectedRgb) {
+    fn render(&mut self, rgb: &HardwareRgb) {
         // GRB pixel order
         self.byte(rgb.1);
         self.byte(rgb.0);

lights/src/gamma.rs

@@ -3,14 +3,9 @@
 //! Gamma correction adjusts the color ramp to look *perceptually* linear
 //! (LEDs with pulse-width modulation are pretty good at giving physically linear results already)
 
-use crate::Lights;
+use crate::{Lights, HardwareRgb};
 use crate::rgb::Rgb;
 
-/// An RGB value that has been gamma-corrected from perceptual to physical color.
-/// At this point it should probably be passed on to an LED for display, not operated on.
-#[derive(Clone, Copy)]
-pub struct CorrectedRgb(pub u8, pub u8, pub u8);
-
 static GAMMA_LOOKUP: &[u8] = &[
     0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
     0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  1,  1,  1,  1,
@@ -31,8 +26,8 @@ static GAMMA_LOOKUP: &[u8] = &[
 ];
 
 #[inline]
-pub fn correct(rgb: &Rgb) -> CorrectedRgb {
+pub fn correct(rgb: &Rgb) -> HardwareRgb {
-    CorrectedRgb(
+    HardwareRgb(
         GAMMA_LOOKUP[rgb.0 as usize],
         GAMMA_LOOKUP[rgb.1 as usize],
         GAMMA_LOOKUP[rgb.2 as usize]
@@ -42,7 +37,7 @@ pub fn correct(rgb: &Rgb) -> CorrectedRgb {
 pub struct GammaCorrector<T>(pub T);
 
 impl<T> Lights for GammaCorrector<T>
-    where T: Lights<Pixel = CorrectedRgb>
+    where T: Lights<Pixel = HardwareRgb>
 {
     type Pixel = Rgb;
 

lights/src/lib.rs

@@ -5,6 +5,12 @@ pub mod rgb;
 
 use core::borrow::Borrow;
 
+/// An RGB value in physical color space, which should be passed on to an LED for display.
+/// Not suitable for color operations, since its values won't be perceptually linear.
+/// See the [rgb] module for the former, and the [gamma] module to convert into this.
+#[derive(Clone, Copy)]
+pub struct HardwareRgb(pub u8, pub u8, pub u8);
+
 pub trait Lights {
     type Pixel;