add remaining rayon, better feature switches

bingus/Cargo.toml

@@ -36,6 +36,7 @@ printpdf = { version = "0.8.2", features = [
 shiva = "1.4.9"
 anyhow = "1.0"
 font-kit = { version = "0.14.2", features = ["loader-freetype-default"] }
+cfg-if = "1.0.0"
 
 [dev-dependencies]
 project-root = "0"

bingus/src/bin_/bytes.rs

@@ -1,5 +1,6 @@
 use std::{borrow::Cow, convert::Infallible};
 
+use cfg_if::cfg_if;
 #[cfg(feature = "rayon")]
 use rayon::iter::{IntoParallelRefMutIterator, ParallelIterator};
 
@@ -28,13 +29,15 @@ impl TryFromDataBytes for Bytes {
 
 impl Bendable for Bytes {
     type Unit = u8;
-    #[cfg(feature = "rayon")]
     fn map<F: Fn(Cow<Self::Unit>) -> Self::Unit + Sync>(mut self, f: F) -> Self {
-        self.par_iter_mut().for_each(|e| *e = f(Cow::Borrowed(e)));
+        cfg_if! {
-        self
+        if #[cfg(feature = "rayon")] {
+            let iter = self.par_iter_mut();
+        } else {
+            let iter = self.iter_mut();
         }
-    fn map<F: Fn(Cow<Self::Unit>) -> Self::Unit + Sync>(mut self, f: F) -> Self {
+        }
-        self.iter_mut().for_each(|e| *e = f(Cow::Borrowed(e)));
+        iter.for_each(|e| *e = f(Cow::Borrowed(e)));
         self
     }
     fn format() -> crate::Format {

bingus/src/doc/pdf.rs

@@ -1,8 +1,11 @@
 use std::borrow::Cow;
 
+use cfg_if::cfg_if;
 use printpdf::{
     Op, PdfDocument, PdfPage, PdfParseErrorSeverity, PdfParseOptions, PdfSaveOptions, PdfWarnMsg,
 };
+#[cfg(feature = "rayon")]
+use rayon::iter::{IntoParallelIterator, ParallelIterator};
 
 use crate::{Bendable, IntoDataBytes, TryFromDataBytes};
 
@@ -73,9 +76,15 @@ impl Bendable for PdfDocument {
             pages: pages
                 .into_iter()
                 .map(|page| PdfPage {
-                    ops: page
+                    ops: {
-                        .ops
+                        cfg_if! {
-                        .into_iter()
+                            if #[cfg(feature = "rayon")] {
+                                page.ops.into_par_iter()
+                            } else {
+                                page.ops.into_iter()
+                            }
+                        }
+                    }
                     .map(|op| f(Cow::Owned(op)))
                     .collect::<Vec<Op>>(),
                     ..page

bingus/src/img/image.rs

@@ -5,6 +5,7 @@ use std::{
     ops::{Add, Deref, DerefMut, Div, Mul, Sub},
 };
 
+use cfg_if::cfg_if;
 pub use image::*;
 use num::{
     traits::{FromBytes, ToBytes},
@@ -179,13 +180,15 @@ where
     P: Send + Sync,
 {
     type Unit = P;
-    #[cfg(feature = "rayon")]
     fn map<F: Fn(Cow<Self::Unit>) -> Self::Unit + Sync>(mut self, f: F) -> Self {
-        self.par_pixels_mut().for_each(|p| *p = f(Cow::Borrowed(p)));
+        cfg_if! {
-        self
+            if #[cfg(feature = "rayon")] {
+                let iter = self.par_pixels_mut();
+            } else {
+                let iter = self.pixels_mut();
             }
-    fn map<F: Fn(Cow<Self::Unit>) -> Self::Unit + Sync>(mut self, f: F) -> Self {
+        }
-        self.pixels_mut().for_each(|p| *p = f(Cow::Borrowed(p)));
+        iter.for_each(|p| *p = f(Cow::Borrowed(p)));
         self
     }
     fn format() -> crate::Format {

bingus/src/snd/raw.rs

@@ -1,6 +1,7 @@
 use std::borrow::Cow;
 
 use super::Sample;
+use cfg_if::cfg_if;
 use derive_wrapper::{AsRef, From};
 use num::{
     traits::{FromBytes, ToBytes},
@@ -67,7 +68,8 @@ where
     }
 }
 
-#[cfg(feature = "rayon")]
+cfg_if! {
+if #[cfg(feature = "rayon")] {
     impl<T> Bendable for RawSamples<T>
     where
         T: Sample + FromBytes + ToBytes + Zero + Send,
@@ -83,7 +85,7 @@ where
             crate::Format::Sound
         }
     }
-
+} else {
     impl<T> Bendable for RawSamples<T>
     where
         T: Sample + FromBytes + ToBytes + Zero + Send,
@@ -98,3 +100,4 @@ where
             crate::Format::Sound
         }
     }
+}}