Add clippy, fix up warnings

enkou-shaders/examples/gasket.rs

@@ -78,10 +78,9 @@ pub fn main() -> Result<()> {
     image.save(temp.path()).context("Unable to save image")?;
 
     let open_program: &str = cfg_select! {
-        unix => Some("xdg-open"),
-        _ => None,
-    }
-    .expect("No available program to open images");
+        unix => "xdg-open",
+        _ => panic!("No available program to open images")
+    };
 
     Command::new(open_program)
         .arg(temp.path())

enkou-shaders/src/camera.rs

@@ -26,14 +26,14 @@ impl Camera {
     ///
     /// * `dimensions` - Width and height of the output image (in pixels).
     /// * `center` - Location of the origin in IFS coordinates. Positive `x` shifts the image
-    ///     left, and positive `y` position shifts the image up.
+    ///   left, and positive `y` position shifts the image up.
     /// * `rotate` - Rotation angle (in radians) of IFS coordinates. Rotation is applied after the
-    ///     `center` translation, so it is about the new origin.
+    ///   `center` translation, so it is about the new origin.
     /// * `zoom` - Zoom factor applied to IFS coordinates. IFS coordinates are scaled by
-    ///     `pow(2, zoom)`, so a zoom factor of 0 is the identity.
+    ///   `pow(2, zoom)`, so a zoom factor of 0 is the identity.
     /// * `scale` - Pixels per unit of IFS coordinates. This parameter is usually chosen such
-    ///     that the largest dimension will cover the range `[-2, 2]`, but values higher or lower
-    ///     can be used as a secondary zoom.
+    ///   that the largest dimension will cover the range `[-2, 2]`, but values higher or lower
+    ///   can be used as a secondary zoom.
     pub fn new(dimensions: UVec2, center: Vec2, rotate: f32, zoom: Vec2, scale: Vec2) -> Camera {
         let ifs_center_transform = Affine2::from_translation(-center);
         let zoom_transform = Affine2::from_scale(vec2(powf(2.0, zoom.x), powf(2.0, zoom.y)));

enkou-shaders/src/lib.rs

@@ -1,6 +1,7 @@
 //! # Enkou
 #![no_std]
-#![warn(missing_docs)]
+#![deny(missing_docs)]
+#![allow(clippy::needless_range_loop)] // SPIR-V backend has issues with iteration over items
 
 pub mod camera;
 pub mod chaos_game;

enkou-shaders/src/rng.rs

@@ -24,7 +24,7 @@ pub(crate) fn xoshiro256starstar_from_seed(
     //  - `u64::from_le_bytes` has issues with `OpBitcast` in SPIR-V validation
     for i in 0..rng_state_actual.len() {
         for j in 0..size_of::<u64>() {
-            rng_state_actual[i] |= (rng_state[i * size_of::<u64>() + j] as u64) << j * 8;
+            rng_state_actual[i] |= (rng_state[i * size_of::<u64>() + j] as u64) << (j * 8);
         }
     }
 

enkou-shaders/src/transform.rs

@@ -41,7 +41,7 @@ impl Transform {
         let variation_start = self.variation_range.x;
         let variation_end = self.variation_range.y;
         for variation_index in variation_start..variation_end {
-            let ref variation = variations[variation_index as usize];
+            let variation = &variations[variation_index as usize];
             point_output += variation.transform_point(point, rng, &self.coefficients)
         }