Implement some std::op traits for Pixel

src/image.rs

@@ -44,6 +44,68 @@ impl Extent {
     }
 }
 
+impl Pixel {
+    pub fn rgba(r: f32, g: f32, b: f32, a: f32) -> Self {
+        Self { r, g, b, a }
+    }
+}
+
+impl std::ops::AddAssign for Pixel {
+    fn add_assign(&mut self, other: Pixel) {
+        self.r += other.r;
+        self.g += other.g;
+        self.b += other.b;
+        self.a += other.a;
+    }
+}
+
+impl std::ops::MulAssign<f32> for Pixel {
+    fn mul_assign(&mut self, scalar: f32) {
+        self.r *= scalar;
+        self.g *= scalar;
+        self.b *= scalar;
+        self.a *= scalar;
+    }
+}
+
+impl std::ops::DivAssign<f32> for Pixel {
+    fn div_assign(&mut self, scalar: f32) {
+        self.r /= scalar;
+        self.g /= scalar;
+        self.b /= scalar;
+        self.a /= scalar;
+    }
+}
+
+impl std::ops::Mul<f32> for Pixel {
+    type Output = Self;
+
+    fn mul(mut self, scalar: f32) -> Self {
+        self *= scalar;
+        self
+    }
+}
+
+impl std::ops::Div<f32> for Pixel {
+    type Output = Self;
+
+    fn div(mut self, scalar: f32) -> Self {
+        self /= scalar;
+        self
+    }
+}
+
+impl std::default::Default for Pixel {
+    fn default() -> Self {
+        Self {
+            r: 0.0,
+            g: 0.0,
+            b: 0.0,
+            a: 0.0,
+        }
+    }
+}
+
 impl From<std::io::Error> for Error {
     fn from(error: std::io::Error) -> Self {
         Error::Io(error)