feat: Add feature flag allowing disabling rayon.

Author: MaxCWhitehead

Cargo.toml

@@ -9,6 +9,10 @@ repository = "https://github.com/forbjok/bevy_simple_tilemap.git"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
+[features]
+default = ["rayon"]
+rayon = ["dep:rayon"]
+
 [dependencies]
 bitflags = "2.3.3"
 bytemuck = "1.13.1"
@@ -29,4 +33,4 @@ default-features = false
 features = ["x11", "png"]
 
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies]
-rayon = "1.7.0"
+rayon = { version = "1.7.0", optional = true }

src/render/extract.rs

@@ -8,7 +8,7 @@ use bevy::render::{texture::Image, view::ComputedVisibility};
 use bevy::sprite::TextureAtlas;
 use bevy::transform::components::GlobalTransform;
 
-#[cfg(not(target_arch = "wasm32"))]
+#[cfg(all(not(target_arch = "wasm32"), feature = "rayon"))]
 use rayon::iter::{IndexedParallelIterator, IntoParallelRefIterator, ParallelIterator};
 
 use crate::tilemap::{row_major_pos, CHUNK_HEIGHT, CHUNK_WIDTH};
@@ -165,7 +165,9 @@ pub fn extract_tilemaps(
 
                 #[cfg(target_arch = "wasm32")]
                 let chunk_iter = chunks.iter();
-                #[cfg(not(target_arch = "wasm32"))]
+                #[cfg(all(not(target_arch = "wasm32"), not(feature = "rayon")))]
+                let chunk_iter = chunks.iter();
+                #[cfg(all(not(target_arch = "wasm32"), feature = "rayon"))]
                 let chunk_iter = chunks.par_iter();
 
                 // Extract chunks
@@ -180,7 +182,9 @@ pub fn extract_tilemaps(
 
                         #[cfg(target_arch = "wasm32")]
                         let tile_iter = chunk.tiles.iter();
-                        #[cfg(not(target_arch = "wasm32"))]
+                        #[cfg(all(not(target_arch = "wasm32"), not(feature = "rayon")))]
+                        let tile_iter = chunk.tiles.iter();
+                        #[cfg(all(not(target_arch = "wasm32"), feature = "rayon"))]
                         let tile_iter = chunk.tiles.par_iter();
 
                         let tiles: Vec<ExtractedTile> = tile_iter

src/render/queue.rs

@@ -16,7 +16,7 @@ use bevy::render::{
 
 use bevy::utils::FloatOrd;
 
-#[cfg(not(target_arch = "wasm32"))]
+#[cfg(all(not(target_arch = "wasm32"), feature = "rayon"))]
 use rayon::iter::{IntoParallelIterator, ParallelIterator};
 
 use crate::TileFlags;
@@ -141,7 +141,9 @@ pub fn queue_tilemaps(
 
                 #[cfg(target_arch = "wasm32")]
                 let chonk_iter = chonks.into_iter();
-                #[cfg(not(target_arch = "wasm32"))]
+                #[cfg(all(not(target_arch = "wasm32"), not(feature = "rayon")))]
+                let chonk_iter = chonks.into_iter();
+                #[cfg(all(not(target_arch = "wasm32"), feature = "rayon"))]
                 let chonk_iter = chonks.into_par_iter();
 
                 // Process extracted chunks in parallel, updating their metadata.