diff --git a/src/buffers.rs b/src/buffers.rs
new file mode 100644
index 0000000..0de96d6
--- /dev/null
+++ b/src/buffers.rs
@@ -0,0 +1,140 @@
+use crate::geometry::*;
+use crate::render::{Surface, Shader, Surfaces};
+
+use std::fmt::{Debug, Formatter};
+use std::rc::Rc;
+use std::cell::RefCell;
+use std::io;
+
+#[cfg(feature="threads")]
+use std::sync::{Arc, Mutex};
+
+#[derive(Debug)]
+pub struct ShaderBinding {
+    shader: Option<Box<dyn Shader>>,
+    rect: Rectangle<u8, Virtual>
+}
+
+#[derive(Clone)]
+pub struct BoundSurface<T> {
+    pub binding: T
+}
+
+impl Debug for BoundSurface<Rc<RefCell<ShaderBinding>>> {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        f.debug_struct("BoundSurface")
+        .field("shader", &self.binding.borrow().shader)
+        .finish()
+    }
+}
+
+pub type SimpleSurface = BoundSurface<Rc<RefCell<ShaderBinding>>>;
+
+impl Default for BoundSurface<Rc<RefCell<ShaderBinding>>>{
+    fn default() -> Self {
+        Self {
+            binding: Rc::new(RefCell::new(ShaderBinding {
+                shader: None,
+                rect: Rectangle::everything()
+            })),
+        }
+    }
+}
+
+impl Surface for BoundSurface<Rc<RefCell<ShaderBinding>>> {
+    fn rect(&self) -> Rectangle<u8, Virtual> {
+        self.binding.borrow().rect.clone()
+    }
+
+    fn with_shader<F: FnMut(&dyn Shader)>(&self, mut f: F) {
+        if let Some(ref shader) = self.binding.borrow().shader {
+            f(shader.as_ref());
+        }
+    }
+
+    fn set_shader(&mut self, shader: Box<dyn Shader>) {
+        self.binding.borrow_mut().shader = Some(shader);
+    }
+
+    fn clear_shader(&mut self) {
+        self.binding.borrow_mut().shader = None;
+    }
+}
+
+#[cfg(feature="threads")]
+pub type SharedSurface = BoundSurface<Arc<Mutex<ShaderBinding>>>;
+
+#[cfg(feature="threads")]
+impl Default for BoundSurface<Arc<Mutex<ShaderBinding>>> {
+    fn default() -> Self {
+        Self {
+            binding: Arc::new(Mutex::new(ShaderBinding {
+                shader: None,
+                rect: Rectangle::everything()
+            })),
+        }
+    }
+}
+
+#[cfg(feature="threads")]
+impl Surface for BoundSurface<Arc<Mutex<ShaderBinding>>> {
+    fn rect(&self) -> Rectangle<u8, Virtual> {
+        let r = self.binding.lock().unwrap();
+        r.rect.clone()
+        //self.binding.lock().unwrap().rect.clone()
+    }
+
+    fn with_shader<F: FnMut(&dyn Shader)>(&self, mut f: F) {
+        if let Some(ref shader) = self.binding.lock().unwrap().shader {
+            f(shader.as_ref());
+        }
+    }
+
+    fn set_shader(&mut self, shader: Box<dyn Shader>) {
+        self.binding.lock().unwrap().shader = Some(shader);
+    }
+
+    fn clear_shader(&mut self) {
+        self.binding.lock().unwrap().shader = None;
+    }
+}
+
+#[cfg(feature="threads")]
+impl Debug for BoundSurface<Arc<Mutex<ShaderBinding>>> {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        f.debug_struct("BoundSurface")
+        .field("shader", &self.binding.lock().unwrap().shader)
+        .finish()
+    }
+}
+
+#[derive(Clone)]
+pub struct SurfacePool<S: Surface + Default> {
+    surfaces: Vec<S>
+}
+
+impl<S: Surface + Debug> Debug for SurfacePool<S> {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        self.surfaces.fmt(f)
+    }
+}
+
+impl<S: Surface + Default> SurfacePool<S> {
+    pub const fn new() -> Self {
+        Self {
+            surfaces: Vec::new()
+        }
+    }
+
+    pub fn iter(&self) -> std::slice::Iter<S> {
+        self.surfaces.iter()
+    }
+}
+
+impl<S: Surface + Default> Surfaces<S> for SurfacePool<S> {
+    fn new_surface(&mut self, _area: &Rectangle<u8, Virtual>) -> Result<S, io::Error> {
+        let surface = S::default();
+        self.surfaces.push(surface.clone());
+        return Ok(surface);
+    }
+}
diff --git a/src/main.rs b/src/main.rs
index bba86b3..aac5a4a 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -7,6 +7,7 @@ mod geometry;
 mod platform;
 mod animations;
 mod mappings;
+mod buffers;
 
 use crate::platform::DisplayInit;
 use crate::render::Surfaces;
@@ -25,10 +26,10 @@ use ws2812_esp32_rmt_driver::lib_smart_leds::Ws2812Esp32Rmt as DisplayType;
 use crate::platform::smart_leds_lib::spi::SPIDisplay as DisplayType;
 
 #[cfg(feature="threads")]
-use crate::render::SharedSurface as SurfaceType;
+use crate::buffers::SharedSurface as SurfaceType;
 
 #[cfg(not(feature="threads"))]
-use crate::render::SimpleSurface as SurfaceType;
+use crate::buffers::SimpleSurface as SurfaceType;
 
 use crate::render::Renderer;
 
diff --git a/src/platform/smart_leds_lib.rs b/src/platform/smart_leds_lib.rs
index 53a4e5d..189232f 100644
--- a/src/platform/smart_leds_lib.rs
+++ b/src/platform/smart_leds_lib.rs
@@ -1,7 +1,8 @@
 use smart_leds_trait::SmartLedsWrite;
 
 use crate::lib8::Rgb8Blend;
-use crate::render::{Surface, SurfacePool, Display, Surfaces};
+use crate::render::{Framed, Surface, Display, Surfaces};
+use crate::buffers::SurfacePool;
 use crate::power::{brightness_for_mw, AsMilliwatts};
 use crate::geometry::*;
 use crate::mappings::*;
@@ -96,20 +97,8 @@ T: SmartLedsWrite,
 S: Surface,
 T::Color: HardwarePixel,
 [T::Color; PIXEL_NUM]: Pixbuf<T::Color>,
-Rgb<u8>: From<T::Color> {
-
-    fn start_frame(&mut self) {
-        self.pixbuf.blank();
-    }
-
-    fn end_frame(&mut self) {
-        let b = brightness_for_mw(self.pixbuf.as_milliwatts(), 255, self.max_mw);
-        if let Err(_) = self.target.write(brightness(self.pixbuf.iter().cloned().map(|x| { x.into() }), b)) {
-        //if let Err(_) = self.target.write(self.pixbuf.iter().cloned()) {
-            panic!("Could not write frame");
-        }
-    }
-
+Rgb<u8>: From<T::Color>
+{
     fn render_frame(&mut self) {
         let surfaces = self.surfaces.take().unwrap();
         for surface in surfaces.iter() {
@@ -129,6 +118,25 @@ Rgb<u8>: From<T::Color> {
     }
 }
 
+impl<T, S, const PIXEL_NUM: usize> Framed for SmartLedDisplay<T, S, PIXEL_NUM> where
+T: SmartLedsWrite,
+S: Surface,
+T::Color: HardwarePixel,
+[T::Color; PIXEL_NUM]: Pixbuf<T::Color>,
+Rgb<u8>: From<T::Color> {
+
+    fn start_frame(&mut self) {
+        self.pixbuf.blank();
+    }
+
+    fn end_frame(&mut self) {
+        let b = brightness_for_mw(self.pixbuf.as_milliwatts(), 255, self.max_mw);
+        if let Err(_) = self.target.write(brightness(self.pixbuf.iter().cloned().map(|x| { x.into() }), b)) {
+            panic!("Could not write frame");
+        }
+    }
+}
+
 #[cfg(feature="rmt")]
 pub mod rmt {
     use esp_idf_svc::hal::prelude::Peripherals;
diff --git a/src/render.rs b/src/render.rs
index d7897e9..8117c98 100644
--- a/src/render.rs
+++ b/src/render.rs
@@ -1,11 +1,6 @@
-use std::rc::Rc;
-use std::cell::RefCell;
 use std::io;
 use rgb::RGB8;
 
-#[cfg(feature="threads")]
-use std::sync::{Arc, Mutex};
-
 use crate::geometry::*;
 use crate::task::Task;
 use crate::time::Periodically;
@@ -17,6 +12,10 @@ pub trait Shader: Send + Debug {
     fn draw(&self, surface_coords: &VirtualCoordinates) -> RGB8;
 }
 
+pub trait Surfaces<T: Surface>: Debug {
+    fn new_surface(&mut self, area: &Rectangle<u8, Virtual>) -> Result<T, io::Error>;
+}
+
 pub trait Surface: Default + Clone + Debug {
     fn with_shader<F: FnMut(&dyn Shader)>(&self, f: F);
     fn set_shader(&mut self, shader: Box<dyn Shader>);
@@ -25,13 +24,12 @@ pub trait Surface: Default + Clone + Debug {
     fn rect(&self) -> Rectangle<u8, Virtual>;
 }
 
-pub trait Surfaces<T: Surface>: Debug {
-    fn new_surface(&mut self, area: &Rectangle<u8, Virtual>) -> Result<T, io::Error>;
-}
-
-pub trait Display<T: Surface>: Surfaces<T> {
+pub trait Framed {
     fn start_frame(&mut self) {}
     fn end_frame(&mut self) {}
+}
+
+pub trait Display<T: Surface>: Surfaces<T> + Framed {
     fn render_frame(&mut self);
 }
 
@@ -67,126 +65,3 @@ impl<T: Display<S>, S: Surface> Task for Renderer<T, S> {
         });
     }
 }
-
-#[derive(Debug)]
-pub struct ShaderBinding {
-    shader: Option<Box<dyn Shader>>,
-    rect: Rectangle<u8, Virtual>
-}
-
-#[derive(Clone)]
-pub struct BoundSurface<T> {
-    pub binding: T
-}
-
-impl Debug for BoundSurface<Rc<RefCell<ShaderBinding>>> {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        f.debug_struct("BoundSurface")
-            .field("shader", &self.binding.borrow().shader)
-            .finish()
-    }
-}
-
-pub type SimpleSurface = BoundSurface<Rc<RefCell<ShaderBinding>>>;
-
-impl Default for BoundSurface<Rc<RefCell<ShaderBinding>>>{
-    fn default() -> Self {
-        Self {
-            binding: Rc::new(RefCell::new(ShaderBinding {
-                shader: None,
-                rect: Rectangle::everything()
-            })),
-        }
-    }
-}
-
-impl Surface for BoundSurface<Rc<RefCell<ShaderBinding>>> {
-    fn rect(&self) -> Rectangle<u8, Virtual> {
-        self.binding.borrow().rect.clone()
-    }
-
-    fn with_shader<F: FnMut(&dyn Shader)>(&self, mut f: F) {
-        if let Some(ref shader) = self.binding.borrow().shader {
-            f(shader.as_ref());
-        }
-    }
-
-    fn set_shader(&mut self, shader: Box<dyn Shader>) {
-        self.binding.borrow_mut().shader = Some(shader);
-    }
-
-    fn clear_shader(&mut self) {
-        self.binding.borrow_mut().shader = None;
-    }
-}
-
-#[cfg(feature="threads")]
-pub type SharedSurface = BoundSurface<Arc<Mutex<ShaderBinding>>>;
-
-#[cfg(feature="threads")]
-impl Default for BoundSurface<Arc<Mutex<ShaderBinding>>> {
-    fn default() -> Self {
-        Self {
-            binding: Arc::new(Mutex::new(ShaderBinding {
-                shader: None,
-            })),
-        }
-    }
-}
-
-#[cfg(feature="threads")]
-impl Surface for BoundSurface<Arc<Mutex<ShaderBinding>>> {
-    fn with_shader<F: FnMut(&dyn Shader)>(&self, mut f: F) {
-        if let Some(ref shader) = self.binding.lock().unwrap().shader {
-            f(shader.as_ref());
-        }
-    }
-
-    fn set_shader(&mut self, shader: Box<dyn Shader>) {
-        self.binding.lock().unwrap().shader = Some(shader);
-    }
-
-    fn clear_shader(&mut self) {
-        self.binding.lock().unwrap().shader = None;
-    }
-}
-
-#[cfg(feature="threads")]
-impl Debug for BoundSurface<Arc<Mutex<ShaderBinding>>> {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        f.debug_struct("BoundSurface")
-        .field("shader", &self.binding.lock().unwrap().shader)
-        .finish()
-    }
-}
-
-#[derive(Clone)]
-pub struct SurfacePool<S: Surface + Default> {
-    surfaces: Vec<S>
-}
-
-impl<S: Surface + Debug> Debug for SurfacePool<S> {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        self.surfaces.fmt(f)
-    }
-}
-
-impl<S: Surface + Default> SurfacePool<S> {
-    pub const fn new() -> Self {
-        Self {
-            surfaces: Vec::new()
-        }
-    }
-
-    pub fn iter(&self) -> std::slice::Iter<S> {
-        self.surfaces.iter()
-    }
-}
-
-impl<S: Surface + Default> Surfaces<S> for SurfacePool<S> {
-    fn new_surface(&mut self, _area: &Rectangle<u8, Virtual>) -> Result<S, io::Error> {
-        let surface = S::default();
-        self.surfaces.push(surface.clone());
-        return Ok(surface);
-    }
-}