Add from_lrgb_u8(), from_lrgba_u8() and to_lrgba_u8().

src/lib.rs

@@ -198,6 +198,30 @@ impl Color {
         Color::from_rgba(from_linear(r), from_linear(g), from_linear(b), a)
     }
 
+    /// Arguments:
+    ///
+    /// * `r`: Red value [0..255]
+    /// * `g`: Green value [0..255]
+    /// * `b`: Blue value [0..255]
+    pub fn from_lrgb_u8(r: u8, g: u8, b: u8) -> Color {
+        Color::from_lrgba(r as f64 / 255., g as f64 / 255., b as f64 / 255., 1.)
+    }
+
+    /// Arguments:
+    ///
+    /// * `r`: Red value [0..255]
+    /// * `g`: Green value [0..255]
+    /// * `b`: Blue value [0..255]
+    /// * `a`: Alpha value [0..255]
+    pub fn from_lrgba_u8(r: u8, g: u8, b: u8, a: u8) -> Color {
+        Color::from_lrgba(
+            r as f64 / 255.,
+            g as f64 / 255.,
+            b as f64 / 255.,
+            a as f64 / 255.,
+        )
+    }
+
     /// Arguments:
     ///
     /// * `h`: Hue angle [0..360]
@@ -394,6 +418,19 @@ impl Color {
         )
     }
 
+    /// Returns: `(r, g, b, a)`
+    ///
+    /// * Red, green, blue and alpha in the range [0..255]
+    pub fn to_lrgba_u8(&self) -> (u8, u8, u8, u8) {
+        let (r, g, b, a) = self.to_lrgba();
+        (
+            (r * 255.).round() as u8,
+            (g * 255.).round() as u8,
+            (b * 255.).round() as u8,
+            (a * 255.).round() as u8,
+        )
+    }
+
     /// Returns: `(l, a, b, alpha)`
     pub fn to_oklaba(&self) -> (f64, f64, f64, f64) {
         let (r, g, b, _) = self.to_lrgba();

tests/color.rs

@@ -12,6 +12,7 @@ fn basic() {
     assert_eq!(c.to_hsla(), (0., 1., 0.5, 1.));
     assert_eq!(c.to_hwba(), (0., 0., 0., 1.));
     assert_eq!(c.to_lrgba(), (1., 0., 0., 1.));
+    assert_eq!(c.to_lrgba_u8(), (255, 0, 0, 255));
     //assert_eq!(c.to_oklaba(), (0.6279151939969809, 0.2249032308661071, 0.12580287012451802, 1.));
     assert_eq!(c.red(), 1.);
     assert_eq!(c.green(), 0.);
@@ -54,6 +55,8 @@ fn red() {
         Color::from_rgb_u8(255, 0, 0),
         Color::from_rgba_u8(255, 0, 0, 255),
         Color::from_lrgb(1., 0., 0.),
+        Color::from_lrgb_u8(255, 0, 0),
+        Color::from_lrgba_u8(255, 0, 0, 255),
         Color::from_hsv(0., 1., 1.),
         Color::from_hsl(360., 1., 0.5),
         Color::from_hwb(0., 0., 0.),