src: implement first iteration of a naive smart-leds display

src/smart_leds_lib.rs

@@ -0,0 +1,91 @@
+use smart_leds_trait::SmartLedsWrite;
+use running_average::RealTimeRunningAverage;
+
+use crate::render::{Surface, SurfacePool, Display, Surfaces};
+use crate::task::Task;
+use crate::power;
+use crate::time::Periodically;
+use crate::lib8::RGB8;
+use crate::geometry::*;
+use crate::power::AsMilliwatts;
+
+use smart_leds::brightness;
+
+use std::io;
+
+use rgb::Rgb;
+
+pub struct SmartLedDisplay<T: SmartLedsWrite<Color = Rgb<u8>>, S: Surface> {
+    surfaces : SurfacePool<S>,
+    target: T,
+    fps: RealTimeRunningAverage<u32>,
+    frame: u32,
+    fps_display: Periodically,
+    pixbuf: [T::Color; 255],
+    total_mw: u32,
+    max_mw: u32
+}
+
+impl<T: SmartLedsWrite<Color = Rgb<u8>>, S: Surface> SmartLedDisplay<T, S> {
+    pub fn new(target: T, max_mw: u32) -> Self {
+        SmartLedDisplay {
+            surfaces: SurfacePool::new(),
+            target: target,
+            max_mw: max_mw,
+            total_mw: 0,
+            fps: RealTimeRunningAverage::default(),
+            frame: 0,
+            fps_display: Periodically::new_every_n_seconds(5),
+            pixbuf: [Rgb::new(0, 0, 0); 255]
+        }
+    }
+}
+
+impl<T: SmartLedsWrite<Color = Rgb<u8>>, S: Surface> Task for SmartLedDisplay<T, S> {
+    fn name(&self) -> &'static str { "Renderer" }
+
+    fn tick(&mut self) {
+        self.start_frame();
+        self.render_frame();
+        self.end_frame();
+    }
+}
+
+impl<T, S> Surfaces<S> for SmartLedDisplay<T, S>
+where
+T: SmartLedsWrite<Color = Rgb<u8>>,
+S: Surface {
+    fn new_surface(&mut self) -> Result<S, io::Error> {
+        self.surfaces.new_surface()
+    }
+}
+
+impl<T: SmartLedsWrite<Color = Rgb<u8>>, S: Surface> Display<S> for SmartLedDisplay<T, S> {
+    fn start_frame(&mut self) {
+        self.frame = self.frame.wrapping_add(1);
+        self.total_mw = 0;
+    }
+
+    fn end_frame(&mut self) {
+        self.fps.insert(1);
+        let b = power::brightness_for_mw(self.total_mw, 255, self.max_mw);
+        self.fps_display.run(|| {
+            log::info!("FPS: {} frame={} brightness={} mw={}", self.fps.measurement(), self.frame, b, self.total_mw);
+        });
+        self.target.write(brightness(self.pixbuf.iter().cloned(), b));
+    }
+
+    fn render_frame(&mut self) {
+        for x in (0..self.pixbuf.len()) {
+            let virtCoords = VirtualCoordinates::new(x as u8, 0);
+            let mut pixel = RGB8::new(0, 0, 0);
+            for surface in self.surfaces.iter() {
+                surface.with_shader(|shader| {
+                    pixel = shader.draw(virtCoords.clone());
+                })
+            }
+            self.total_mw += pixel.as_milliwatts();
+            self.pixbuf[x] = Rgb::new(pixel.red, pixel.green, pixel.blue);
+        };
+    }
+}