Replace in-tree JPEG encoder with jpeg-encoder crate

Cargo.toml

@@ -55,6 +55,7 @@ rgb = { version = "0.8.48", default-features = false, optional = true }
 tiff = { version = "0.10.3", optional = true }
 zune-core = { version = "0.5.0", default-features = false, optional = true }
 zune-jpeg = { version = "0.5.5", optional = true }
+jpeg-encoder = { version = "0.6.1", optional = true, features = ["simd"] }
 serde = { version = "1.0.214", optional = true, features = ["derive"] }
 
 [dev-dependencies]
@@ -77,7 +78,7 @@ ff = [] # Farbfeld image format
 gif = ["dep:gif", "dep:color_quant"]
 hdr = []
 ico = ["bmp", "png"]
-jpeg = ["dep:zune-core", "dep:zune-jpeg"]
+jpeg = ["dep:zune-core", "dep:zune-jpeg", "dep:jpeg-encoder"]
 png = ["dep:png"]
 pnm = []
 qoi = ["dep:qoi"]

benches/encode.rs

@@ -1,8 +1,8 @@
 extern crate criterion;
 
 use criterion::{criterion_group, criterion_main, BenchmarkId, Criterion};
-use image::ExtendedColorType;
 use image::{codecs::bmp::BmpEncoder, codecs::jpeg::JpegEncoder, ColorType};
+use image::{ExtendedColorType, ImageEncoder};
 
 use std::fs::File;
 use std::io::{BufWriter, Seek, SeekFrom, Write};
@@ -128,7 +128,7 @@ impl EncoderBase for Bmp {
 
 impl EncoderBase for Jpeg {
     fn encode(&self, mut into: impl Write, im: &[u8], size: u32, color: ExtendedColorType) {
-        let mut x = JpegEncoder::new(&mut into);
-        x.encode(im, size, size, color).unwrap();
+        let x = JpegEncoder::new(&mut into);
+        x.write_image(im, size, size, color).unwrap();
     }
 }

deny.toml

@@ -20,6 +20,7 @@ allow = [
     "BSD-3-Clause",
     "MIT",
     "Unicode-3.0",
+    "IJG", # for parts of jpeg-encoder ported from IJG libjpeg; highly permissive
 ]
 
 [[licenses.exceptions]]