add background color for color wipe and my first unit test !

spectacle.yml

@@ -2,21 +2,21 @@
     mac_addresses :
       - C9:81:9C:BA:53:BC
     sequence:
-      - pattern:
-          type: Blink
-          fade:
-            current_iteration: 10
-            nbr_iterations: 20
-            begin_color: &black
-              red: 0
-              green: 0
-              blue: 0
-            end_color: &purple
-              red: 255
-              green: 0
-              blue: 255
-          max_iteration: 10
-        period: 50
+#      - pattern:
+#          type: Blink
+#          fade:
+#            current_iteration: 10
+#            nbr_iterations: 20
+#            begin_color: &black
+#              red: 0
+#              green: 0
+#              blue: 0
+#            end_color: &purple
+#              red: 255
+#              green: 0
+#              blue: 255
+#          max_iteration: 10
+#        period: 50
       - pattern:
           type: Fade
           nbr_iterations: 20
@@ -36,7 +36,6 @@
             red: 0
             green: 255
             blue: 0
-          background_color: *purple
         period: 100
       - pattern:
           type: FillRandom
@@ -45,17 +44,22 @@
         period: 80
   - name: titi
     sequence:
-      - pattern:
-          type: Blink
-          fade :
-            nbr_iterations: 20
-            begin_color: *black
-            end_color: &cyan
-                red: 0
-                green: 255
-                blue: 255
-          max_iteration : 10
-        period: 50
+#      - pattern:
+#          type: Blink
+#          fade :
+#            nbr_iterations: 20
+#            begin_color: *black
+#            end_color: &cyan
+#                red: 0
+#                green: 255
+#                blue: 255
+#          max_iteration : 10
+#        period: 50
       - pattern:
           type: Rainbow
+          max_iteration: 200
+        period: 10
+      - pattern:
+          type: ColorWipe
+          color: *blue
         period: 100

src/patterns.rs

@@ -5,6 +5,7 @@ mod rainbow;
 mod fill_random;
 mod fill_unstable;
 mod blink;
+mod rain;
 
 use serde_derive::{Deserialize, Serialize};
 use std::fmt;
@@ -29,6 +30,12 @@ pub(crate) enum Patterns<const N: usize> {
     Blink(Blink<N>),
 }
 
+pub trait Pattern : Iterator {
+    type Strip;
+
+    fn init(&self) -> Option<Self::Strip>;
+}
+
 impl<const N: usize> Iterator for Patterns<N> {
     type Item = Strip<N>;
 
@@ -45,6 +52,22 @@ impl<const N: usize> Iterator for Patterns<N> {
     }
 }
 
+impl<const N: usize> Pattern for Patterns<N> {
+    type Strip = Strip<N>;
+
+    fn init(&self) -> Option<Self::Strip> {
+        match self {
+            Patterns::Rainbow(p) => p.init(),
+            Patterns::Fade(p) => p.init(),
+            Patterns::ColorWipe(p) => p.init(),
+            Patterns::Scanner(p) => p.init(),
+            Patterns::FillRandom(p) => p.init(),
+            Patterns::FillUnstable(p) => p.init(),
+            Patterns::Blink(p) => p.init(),
+        }
+    }
+}
+
 ///
 /// a struct for an RGB color
 #[derive(Clone, Copy, Debug, Serialize, Deserialize, Default, Eq, Hash, PartialEq)]
@@ -84,17 +107,17 @@ impl SubAssign for PixelColor {
 ///
 /// a basic newtype based on a fix array size.
 ///
-#[derive(Copy, Clone)]
-pub struct Strip<const N: usize>([PixelColor; N]);
+#[derive(Copy, Clone, Debug, Eq, Hash, PartialEq)]
+pub struct Strip<const N: usize>([Option<PixelColor>; N]);
 
 impl<const N: usize> Default for Strip<N> {
     fn default() -> Self {
-        Strip([PixelColor::default(); N])
+        Strip([None; N])
     }
 }
 
 impl<const N: usize> Index<usize> for Strip<N> {
-    type Output = PixelColor;
+    type Output = Option<PixelColor>;
 
     fn index(&self, index: usize) -> &Self::Output {
         &self.0[index]
@@ -102,7 +125,7 @@ impl<const N: usize> Index<usize> for Strip<N> {
 }
 
 impl<const N: usize> IndexMut<usize> for Strip<N> {
-    fn index_mut(&mut self, index: usize) -> &mut PixelColor {
+    fn index_mut(&mut self, index: usize) -> &mut Option<PixelColor> {
         &mut self.0[index]
     }
 }
@@ -112,16 +135,17 @@ impl<const N: usize> Strip<N> {
         let mut data: Vec<u8> = vec![];
 
         for i in 0..N {
-            data.append(&mut vec![self[i].green, self[i].red, self[i].blue]);
+            let color = self[i].unwrap_or(PixelColor::default());
+            data.append(&mut vec![color.green, color.red, color.blue]);
         }
         data
     }
 
     pub fn new(color: PixelColor) -> Strip<N> {
-        Strip { 0: [color; N] }
+        Strip { 0: [Some(color); N] }
     }
 
     pub fn fill(&mut self, color: PixelColor) {
-        self.0.fill(color);
+        self.0.fill(Some(color));
     }
 }

src/patterns/blink.rs

@@ -1,6 +1,7 @@
 use crate::patterns::fade::Fade;
 use crate::Strip;
 use serde::{Serialize, Deserialize};
+use crate::patterns::Pattern;
 
 /// # Blink
 ///
@@ -13,6 +14,14 @@ pub struct Blink<const N: usize> {
     fade: Fade<N>,
 }
 
+impl<const N: usize> Pattern for Blink<N> {
+    type Strip = Strip<N>;
+
+    fn init(&self) -> Option<Self::Strip> {
+        None
+    }
+}
+
 impl<const N: usize> Iterator for Blink<N> {
     type Item = Strip<N>;
 

src/patterns/color_wipe.rs

@@ -1,4 +1,4 @@
-use crate::patterns::PixelColor;
+use crate::patterns::{Pattern, PixelColor};
 use crate::Strip;
 use serde::{Serialize, Deserialize};
 
@@ -20,6 +20,18 @@ pub struct ColorWipe<const N: usize> {
     pub(crate) background_color: Option<PixelColor>,
 }
 
+impl<const N: usize> Pattern for ColorWipe<N> {
+    type Strip = Strip<N>;
+
+    fn init(&self) -> Option<Self::Strip> {
+        if let Some(color) = self.background_color {
+            Some(Strip::<N>::new(color))
+        } else {
+            None
+        }
+    }
+}
+
 impl<const N: usize> Iterator for ColorWipe<N> {
     type Item = Strip<N>;
 
@@ -36,7 +48,7 @@ impl<const N: usize> Iterator for ColorWipe<N> {
         }
 
         for i in 0..iteration {
-            strip[i] = self.color;
+            strip[i] = Some(self.color);
         }
         self.current_iteration += 1;
         Some(strip)

src/patterns/fade.rs

@@ -1,4 +1,4 @@
-use crate::patterns::PixelColor;
+use crate::patterns::{Pattern, PixelColor};
 use crate::Strip;
 use serde::{Serialize, Deserialize};
 
@@ -17,6 +17,14 @@ fn fade_value(value_start: u8, value_end: u8, index: usize, nbr_iter: usize) ->
     ((value_start as usize * (nbr_iter - index) + value_end as usize * index) / nbr_iter) as u8
 }
 
+impl<const N: usize> Pattern for Fade<N> {
+    type Strip = Strip<N>;
+
+    fn init(&self) -> Option<Self::Strip> {
+        None
+    }
+}
+
 impl<const N: usize> Iterator for Fade<N> {
     type Item = Strip<N>;
 

src/patterns/fill_random.rs

@@ -1,5 +1,5 @@
 use rand::Rng;
-use crate::patterns::PixelColor;
+use crate::patterns::{Pattern, PixelColor};
 use crate::Strip;
 use serde::{Serialize, Deserialize};
 
@@ -13,6 +13,14 @@ pub struct FillRandom<const N: usize> {
     pub(crate) max_iteration: Option<usize>,
 }
 
+impl<const N: usize> Pattern for FillRandom<N> {
+    type Strip = Strip<N>;
+
+    fn init(&self) -> Option<Self::Strip> {
+        None
+    }
+}
+
 impl<const N: usize> Iterator for FillRandom<N> {
     type Item = Strip<N>;
 
@@ -45,7 +53,7 @@ impl<const N: usize> Iterator for FillRandom<N> {
                 blue = self.color.blue.saturating_sub(blue_delta);
             }
             let c = PixelColor { red, green, blue };
-            strip[i] = c;
+            strip[i] = Some(c);
         }
         Some(strip)
     }

src/patterns/fill_unstable.rs

@@ -1,5 +1,5 @@
 use rand::Rng;
-use crate::patterns::PixelColor;
+use crate::patterns::{Pattern, PixelColor};
 use crate::Strip;
 use serde::{Serialize, Deserialize};
 
@@ -13,6 +13,14 @@ pub struct FillUnstable<const N: usize> {
     pub(crate) max_iteration: Option<usize>,
 }
 
+impl<const N: usize> Pattern for FillUnstable<N> {
+    type Strip = Strip<N>;
+
+    fn init(&self) -> Option<Self::Strip> {
+        None
+    }
+}
+
 impl<const N: usize> Iterator for FillUnstable<N> {
     type Item = Strip<N>;
 

src/patterns/rain.rs

@@ -0,0 +1,48 @@
+use crate::patterns::PixelColor;
+use crate::Strip;
+use serde::{Serialize, Deserialize};
+
+/// # scanner pattern
+/// color one pixel with a color and leave a train of this color fading to black
+///
+/// # note
+///
+/// background_color work only for color not set by scanner pattern
+#[derive(Serialize, Deserialize, Debug, Eq, Hash, PartialEq, Copy, Clone)]
+pub struct Scanner<const N: usize> {
+    #[serde(default)]
+    current_iteration: usize,
+    pub(crate) color: PixelColor,
+    pub(crate) background_color: Option<PixelColor>,
+    pub(crate) stability: usize,
+    #[serde(skip)]
+    strip : Strip<N>,
+}
+
+impl<const N: usize> Iterator for Scanner<N> {
+    type Item = Strip<N>;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        let mut strip = Strip::<N>::default();
+        if let Some(c) = self.background_color {
+            strip.fill(c);
+        } else {
+            strip.fill(PixelColor::default());
+        }
+
+        let current_led = self.current_iteration % N;
+        let min_led;
+        if current_led < 8 {
+            min_led = 0;
+        } else {
+            min_led = current_led - 8;
+        }
+        let mut c = self.color;
+        for i in min_led..current_led {
+            strip[i] = Some(c);
+            c = c / 2;
+        }
+        self.current_iteration += 1;
+        Some(strip)
+    }
+}

src/patterns/rainbow.rs

@@ -1,4 +1,4 @@
-use crate::patterns::PixelColor;
+use crate::patterns::{Pattern, PixelColor};
 use crate::Strip;
 use serde::{Serialize, Deserialize};
 
@@ -20,6 +20,14 @@ pub struct Rainbow<const N: usize> {
     pub(crate) step: Option<usize>,
 }
 
+impl<const N: usize> Pattern for Rainbow<N> {
+    type Strip = Strip<N>;
+
+    fn init(&self) -> Option<Self::Strip> {
+        None
+    }
+}
+
 impl<const N: usize> Iterator for Rainbow<N> {
     type Item = Strip<N>;
 
@@ -33,7 +41,7 @@ impl<const N: usize> Iterator for Rainbow<N> {
         let step = self.step.unwrap_or(255 / N);
         for i in 0..N {
             let pos = (i * step + self.current_iteration) as u8;
-            strip[i] = wheel(pos)
+            strip[i] = Some(wheel(pos))
         }
         self.current_iteration += 1;
         Some(strip)

src/patterns/scanner.rs

@@ -1,4 +1,4 @@
-use crate::patterns::PixelColor;
+use crate::patterns::{Pattern, PixelColor};
 use crate::Strip;
 use serde::{Serialize, Deserialize};
 
@@ -16,6 +16,18 @@ pub struct Scanner<const N: usize> {
     pub(crate) background_color: Option<PixelColor>,
 }
 
+impl<const N:usize> Pattern for Scanner<N> {
+    type Strip = Strip<N>;
+
+    fn init(&self) -> Option<Self::Strip> {
+        if let Some(color) = self.background_color {
+            Some(Strip::<N>::new(color))
+        } else {
+            None
+        }
+    }
+}
+
 impl<const N: usize> Iterator for Scanner<N> {
     type Item = Strip<N>;
 
@@ -36,7 +48,7 @@ impl<const N: usize> Iterator for Scanner<N> {
         }
         let mut c = self.color;
         for i in min_led..current_led {
-            strip[i] = c;
+            strip[i] = Some(c);
             c = c / 2;
         }
         self.current_iteration += 1;

src/runner.rs

@@ -1,8 +1,8 @@
 use crate::config::Config;
-use crate::patterns::{Patterns, PixelColor};
+use crate::patterns::{Patterns, PixelColor, Pattern};
 use crate::Strip;
 use bluer::Address;
-use serde_derive::{Deserialize, Serialize};
+use serde::{Deserialize, Serialize};
 use std::collections::HashMap;
 use std::future::Future;
 use std::str::FromStr;
@@ -41,27 +41,46 @@ pub struct Context<const N: usize> {
 
 pub(crate) type DeviceSequence<const N: usize> = Vec<Context<N>>;
 
+
+
 pub async fn runner_loop<const N: usize>(runner: DeviceSequence<N>, tx: Sender<Strip<N>>) {
+    let mut background = Strip::<N>::default();
     for mut context in runner {
-        let mut strip = context.pattern.next().unwrap();
+        let mut strip = context.pattern.init().unwrap_or(background);
         let delay = context.period;
         while tx.send(strip).is_ok() {
             if let Some(value) = context.pattern.next() {
-                strip = value;
+                strip = apply_mask(background, value);
             } else {
                 break;
             }
             tokio::time::sleep(delay).await;
         }
+        background = strip;
+        println!("{:?}", background);
     }
 }
 
+pub fn apply_mask<const N: usize>(previous_strip: Strip<N>, strip: Strip<{ N }>) -> Strip<N> {
+    let mut new_strip = Strip::default();
+    for i in 0..N {
+        if let Some(color) = strip[i] {
+            new_strip[i] = Some(color);
+        } else {
+            new_strip[i] = previous_strip[i];
+        }
+    }
+    new_strip
+}
+
 #[derive(Default)]
 pub struct Spectacle<const N: usize> {
     runners: HashMap<DeviceSequence<N>, (Sender<Strip<N>>, Receiver<Strip<N>>)>,
     channels: HashMap<Address, Receiver<Strip<N>>>,
     default_runner: Option<(DeviceSequence<N>, Sender<Strip<N>>)>,
     default_receiver: Option<Receiver<Strip<N>>>,
+    // #[serde(skip)]
+    buffered_strip: Strip<N>,
 }
 
 impl<const N: usize> Spectacle<N> {
@@ -134,6 +153,7 @@ impl<const N: usize> Spectacle<N> {
         }
         joinhandles
     }
+
 }
 
 impl<const N: usize> From<Config<N>> for Spectacle<N> {
@@ -159,3 +179,35 @@ impl<const N: usize> From<Config<N>> for Spectacle<N> {
         spectacle
     }
 }
+
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn apply_mask() {
+        let pixel_entry = PixelColor {
+            red: 10,
+            green: 10,
+            blue: 10
+        };
+
+        let pixel_mask = PixelColor {
+            red: 20,
+            green: 20,
+            blue: 20
+        };
+
+        let mut entry = Strip::<5>::new(pixel_entry) ;
+        entry[0] = None;
+        entry[1] = None;
+
+        let mut mask = Strip::<5>::new(pixel_mask) ;
+        mask[0] = None;
+
+        let mut expected = entry.clone();
+        expected[1] = Some(pixel_mask);
+        assert_eq!(expected, super::apply_mask(mask, entry));
+    }
+}