Fix cargo doc warnings and add CI script

Author: kangalio

.github/workflows/ci.yml

@@ -0,0 +1,18 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  check:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
+      - uses: Swatinem/rust-cache@v2
+      # needed or else: `The system library `alsa` required by crate `alsa-sys` was not found.`
+      - run: sudo apt-get update && sudo apt-get install -y libasound2-dev
+      - run: ./ci.sh

ci.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+set -euo pipefail
+
+cargo fmt --all --check
+cargo clippy --all-targets --all-features -- -D warnings
+cargo test --all
+cargo doc --no-deps

src/canvas/color.rs

@@ -282,7 +282,7 @@ impl std::iter::Sum for Color {
 #[cfg(feature = "embedded-graphics")]
 impl From<Color> for embedded_graphics::pixelcolor::Rgb888 {
     fn from(color: Color) -> Self {
-        let (r, g, b) = color.quantize(256);
+        let (r, g, b) = color.quantize(255);
         Self::new(r, g, b)
     }
 }

src/canvas/generic.rs

@@ -73,9 +73,7 @@ pub struct DeviceCanvas<Spec: DeviceSpec> {
 }
 
 impl<Spec: DeviceSpec> DeviceCanvas<Spec> {
-    /// Create a new canvas by guessing both input and output MIDI connection by their name. If you
-    /// need precise control over the specific MIDI connections that will be used, use
-    /// [`DeviceCanvas::from_ports`] instead // TODO: not implemented yet
+    /// Create a new canvas by guessing both input and output MIDI connection by their name.
     pub fn guess(
         mut callback: impl FnMut(CanvasMessage) + Send + 'static,
     ) -> Result<Self, crate::MidiError> {

src/canvas/mod.rs

@@ -37,7 +37,7 @@ macro_rules! impl_traits_for_canvas {
                 prelude::*,
                 draw_target::DrawTarget,
                 geometry::Dimensions,
-                pixelcolor::{Rgb888, RgbColor},
+                pixelcolor::Rgb888,
                 primitives::rectangle::Rectangle,
             };
         }

src/canvas/pad.rs

@@ -107,8 +107,6 @@ impl Pad {
     }
 
     /// If this pad is outside the bounding rectangle, wrap it around
-    ///
-    /// Note: if you want more fine-grained edges, use [`Canvas::wrap_edges`] instead
     pub fn wrap_edges(self, width: u32, height: u32) -> Pad {
         Pad {
             x: self.x.rem_euclid(width as i32),