diff --git a/src/bitmap.rs b/src/bitmap.rs
index de094d2..d030ea8 100644
--- a/src/bitmap.rs
+++ b/src/bitmap.rs
@@ -1,18 +1,20 @@
+use crate::macros::{
+    wrap_get_set_fill_2d, wrap_uniffi_object, wrap_width_height,
+};
 use servicepoint::{DataRef, Grid};
-use std::sync::{Arc};
-use crate::macros::{wrap_width_height, wrap_uniffi_object};
+use std::sync::Arc;
 
 wrap_uniffi_object!(Bitmap);
 wrap_width_height!(Bitmap);
+wrap_get_set_fill_2d!(Bitmap, bool);
 
 #[uniffi::export]
 impl Bitmap {
     #[uniffi::constructor]
     pub fn new(width: u64, height: u64) -> Arc<Self> {
-        Self::internal_new(servicepoint::Bitmap::new(
-            width as usize,
-            height as usize,
-        ).unwrap())
+        Self::internal_new(
+            servicepoint::Bitmap::new(width as usize, height as usize).unwrap(),
+        )
     }
 
     #[uniffi::constructor]
@@ -22,28 +24,12 @@ impl Bitmap {
 
     #[uniffi::constructor]
     pub fn load(width: u64, height: u64, data: Vec<u8>) -> Arc<Self> {
-        Self::internal_new(servicepoint::Bitmap::load(
-            width as usize,
-            height as usize,
-            &data,
-        ).unwrap())
+        Self::internal_new(
+            servicepoint::Bitmap::load(width as usize, height as usize, &data)
+                .unwrap(),
+        )
     }
 
-    pub fn set(&self, x: u64, y: u64, value: bool) {
-        self.actual
-            .write()
-            .unwrap()
-            .set(x as usize, y as usize, value)
-    }
-
-    pub fn get(&self, x: u64, y: u64) -> bool {
-        self.actual.read().unwrap().get(x as usize, y as usize)
-    }
-
-    pub fn fill(&self, value: bool) {
-        self.actual.write().unwrap().fill(value)
-    }
-    
     pub fn equals(&self, other: &Bitmap) -> bool {
         let a = self.actual.read().unwrap();
         let b = other.actual.read().unwrap();
diff --git a/src/brightness.rs b/src/brightness.rs
new file mode 100644
index 0000000..0ea4591
--- /dev/null
+++ b/src/brightness.rs
@@ -0,0 +1,19 @@
+use crate::UniffiCustomTypeConverter;
+use servicepoint::Brightness;
+
+uniffi::custom_type!(Brightness, u8);
+
+impl UniffiCustomTypeConverter for Brightness {
+    type Builtin = u8;
+
+    fn into_custom(val: Self::Builtin) -> uniffi::Result<Self>
+    where
+        Self: Sized,
+    {
+        Ok(Brightness::saturating_from(val))
+    }
+
+    fn from_custom(obj: Self) -> Self::Builtin {
+        obj.into()
+    }
+}
diff --git a/src/brightness_grid.rs b/src/brightness_grid.rs
index 04f6321..697a71f 100644
--- a/src/brightness_grid.rs
+++ b/src/brightness_grid.rs
@@ -1,9 +1,12 @@
+use crate::macros::{
+    wrap_get_set_fill_2d, wrap_uniffi_object, wrap_width_height,
+};
 use servicepoint::{Brightness, DataRef, Grid};
-use std::sync::{Arc};
-use crate::macros::{wrap_width_height, wrap_uniffi_object};
+use std::sync::Arc;
 
 wrap_uniffi_object!(BrightnessGrid);
 wrap_width_height!(BrightnessGrid);
+wrap_get_set_fill_2d!(BrightnessGrid, Brightness);
 
 #[uniffi::export]
 impl BrightnessGrid {
@@ -17,36 +20,16 @@ impl BrightnessGrid {
 
     #[uniffi::constructor]
     pub fn load(width: u64, height: u64, data: Vec<u8>) -> Arc<Self> {
-        Self::internal_new(servicepoint::BrightnessGrid::saturating_load(
-            width as usize,
-            height as usize,
-            &data,
-        ).unwrap())
-    }
-
-    pub fn set(&self, x: u64, y: u64, value: u8) {
-        self.actual.write().unwrap().set(
-            x as usize,
-            y as usize,
-            Brightness::saturating_from(value),
+        Self::internal_new(
+            servicepoint::BrightnessGrid::saturating_load(
+                width as usize,
+                height as usize,
+                &data,
+            )
+            .unwrap(),
         )
     }
 
-    pub fn get(&self, x: u64, y: u64) -> u8 {
-        self.actual
-            .read()
-            .unwrap()
-            .get(x as usize, y as usize)
-            .into()
-    }
-
-    pub fn fill(&self, value: u8) {
-        self.actual
-            .write()
-            .unwrap()
-            .fill(Brightness::saturating_from(value))
-    }
-
     pub fn equals(&self, other: &BrightnessGrid) -> bool {
         let a = self.actual.read().unwrap();
         let b = other.actual.read().unwrap();
diff --git a/src/cp437_grid.rs b/src/cp437_grid.rs
index b7ba623..eeeb8b6 100644
--- a/src/cp437_grid.rs
+++ b/src/cp437_grid.rs
@@ -1,10 +1,11 @@
 use crate::char_grid::CharGrid;
+use crate::macros::{wrap_get_set_fill_2d, wrap_uniffi_object, wrap_width_height};
 use servicepoint::{DataRef, Grid};
-use std::sync::{Arc};
-use crate::macros::{wrap_width_height, wrap_uniffi_object};
+use std::sync::Arc;
 
 wrap_uniffi_object!(Cp437Grid);
 wrap_width_height!(Cp437Grid);
+wrap_get_set_fill_2d!(Cp437Grid, u8);
 
 #[uniffi::export]
 impl Cp437Grid {
@@ -18,26 +19,14 @@ impl Cp437Grid {
 
     #[uniffi::constructor]
     pub fn load(width: u64, height: u64, data: Vec<u8>) -> Arc<Self> {
-        Self::internal_new(servicepoint::Cp437Grid::load(
-            width as usize,
-            height as usize,
-            &data,
-        ).unwrap())
-    }
-
-    pub fn set(&self, x: u64, y: u64, value: u8) {
-        self.actual
-            .write()
-            .unwrap()
-            .set(x as usize, y as usize, value)
-    }
-
-    pub fn get(&self, x: u64, y: u64) -> u8 {
-        self.actual.read().unwrap().get(x as usize, y as usize)
-    }
-
-    pub fn fill(&self, value: u8) {
-        self.actual.write().unwrap().fill(value)
+        Self::internal_new(
+            servicepoint::Cp437Grid::load(
+                width as usize,
+                height as usize,
+                &data,
+            )
+            .unwrap(),
+        )
     }
 
     pub fn equals(&self, other: &Cp437Grid) -> bool {
diff --git a/src/lib.rs b/src/lib.rs
index b981f9d..c116ccb 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -2,6 +2,7 @@ uniffi::setup_scaffolding!();
 
 mod bitmap;
 mod bitvec;
+mod brightness;
 mod brightness_grid;
 mod char_grid;
 mod command;
diff --git a/src/macros.rs b/src/macros.rs
index 9a4de90..799a95f 100644
--- a/src/macros.rs
+++ b/src/macros.rs
@@ -1,13 +1,14 @@
-
 macro_rules! wrap_uniffi_object {
-     ($orig_t:ident, $new_t:ident) => {
+    ($orig_t:ident, $new_t:ident) => {
         #[derive(uniffi::Object)]
         pub struct $new_t {
             pub(crate) actual: std::sync::RwLock<servicepoint::$orig_t>,
         }
 
         impl $new_t {
-            pub(crate) fn internal_new(actual: servicepoint::$orig_t) -> Arc<Self> {
+            pub(crate) fn internal_new(
+                actual: servicepoint::$orig_t,
+            ) -> Arc<Self> {
                 Arc::new(Self {
                     actual: std::sync::RwLock::new(actual),
                 })
@@ -21,7 +22,7 @@ macro_rules! wrap_uniffi_object {
                 Self::internal_new(other.actual.read().unwrap().clone())
             }
         }
-     };
+    };
     ($t:ident) => {
         wrap_uniffi_object!($t, $t);
     };
@@ -36,7 +37,7 @@ macro_rules! wrap_width_height {
             pub fn width(&self) -> u64 {
                 self.actual.read().unwrap().width() as u64
             }
-        
+
             pub fn height(&self) -> u64 {
                 self.actual.read().unwrap().height() as u64
             }
@@ -44,4 +45,28 @@ macro_rules! wrap_width_height {
     };
 }
 
-pub(crate) use wrap_width_height;
\ No newline at end of file
+pub(crate) use wrap_width_height;
+
+macro_rules! wrap_get_set_fill_2d {
+    ($t:ident, $contained:ident) => {
+        #[uniffi::export]
+        impl $t {
+            pub fn set(&self, x: u64, y: u64, value: $contained) {
+                self.actual
+                    .write()
+                    .unwrap()
+                    .set(x as usize, y as usize, value)
+            }
+
+            pub fn get(&self, x: u64, y: u64) -> $contained {
+                self.actual.read().unwrap().get(x as usize, y as usize)
+            }
+
+            pub fn fill(&self, value: $contained) {
+                self.actual.write().unwrap().fill(value)
+            }
+        }
+    };
+}
+
+pub(crate) use wrap_get_set_fill_2d;