1 files changed, 53 insertions, 0 deletions
diff --git a/src/transform.rs b/src/transform.rs
index ccb1850..10af82e 100644
--- a/src/transform.rs
+++ b/src/transform.rs
@@ -12,6 +12,12 @@ impl Sample for Matrix {
         );
         self.inner.sample(x, y)
     }
+    fn clone(&self) -> Box<dyn Sample> {
+        box Self {
+            inner: self.inner.clone(),
+            matrix: self.matrix.clone(),
+        }
+    }
 }
 
 pub struct Polar(pub Box<dyn Sample>);
@@ -21,6 +27,9 @@ impl Sample for Polar {
         let dist = (x * x + y * y).sqrt();
         self.0.sample(ang, dist)
     }
+    fn clone(&self) -> Box<dyn Sample> {
+        box Self(self.0.clone())
+    }
 }
 
 pub struct Transpose(pub Box<dyn Sample>);
@@ -28,6 +37,9 @@ impl Sample for Transpose {
     fn sample(&mut self, x: f64, y: f64) -> Color {
         self.0.sample(y, x)
     }
+    fn clone(&self) -> Box<dyn Sample> {
+        box Self(self.0.clone())
+    }
 }
 
 pub struct Translate {
@@ -38,8 +50,42 @@ impl Sample for Translate {
     fn sample(&mut self, x: f64, y: f64) -> Color {
         self.inner.sample(x - self.offset.0, y - self.offset.1)
     }
+    fn clone(&self) -> Box<dyn Sample> {
+        box Self {
+            inner: self.inner.clone(),
+            offset: self.offset.clone(),
+        }
+    }
+}
+
+#[derive(Clone, Copy)]
+pub enum FilterOperation {
+    Abs,
+}
+pub struct Filter {
+    pub inner: Box<dyn Sample>,
+    pub mode: FilterOperation,
+}
+impl Sample for Filter {
+    fn sample(&mut self, x: f64, y: f64) -> Color {
+        let a = self.inner.sample(x, y);
+        match self.mode {
+            FilterOperation::Abs => Color {
+                r: a.r.abs(),
+                g: a.g.abs(),
+                b: a.b.abs(),
+            },
+        }
+    }
+    fn clone(&self) -> Box<dyn Sample> {
+        box Self {
+            inner: self.inner.clone(),
+            mode: self.mode,
+        }
+    }
 }
 
+#[derive(Clone, Copy)]
 pub enum CompositeOperation {
     Add,
     Subtract,
@@ -78,4 +124,11 @@ impl Sample for Composite {
             },
         }
     }
+    fn clone(&self) -> Box<dyn Sample> {
+        box Self {
+            a: self.a.clone(),
+            b: self.b.clone(),
+            mode: self.mode,
+        }
+    }
 }