Vendor rawler 0.7.2 unmodified

The crate as crates.io publishes it, minus .cargo-ok, its Cargo.lock and
data/testdata (13 MB of sample files only its own tests read). Not yet
routed through [patch.crates-io]; the next commit is the patch.

third_party/rawler-0.7.2/src/devtools/inspector.rs

@@ -0,0 +1,13 @@
+// The debug version
+#[cfg(feature = "inspector")]
+#[macro_export]
+macro_rules! inspector {
+      ($( $args:expr ),*) => { println!( $( $args ),* ); }
+  }
+
+// Non-debug version
+#[cfg(not(feature = "inspector"))]
+#[macro_export]
+macro_rules! inspector {
+  ($( $args:expr ),*) => {};
+}

third_party/rawler-0.7.2/src/devtools/mod.rs

@@ -0,0 +1,41 @@
+// SPDX-License-Identifier: LGPL-2.1
+// Copyright 2021 Daniel Vogelbacher <daniel@chaospixel.com>
+
+use std::{
+  fs::File,
+  io::{BufWriter, Write},
+};
+
+use byteorder::{LittleEndian, WriteBytesExt};
+use image::{ImageBuffer, ImageFormat, Luma, Rgb};
+pub(crate) mod inspector;
+
+pub fn dump_image_u16(data: &[u16], width: usize, height: usize, path: impl AsRef<str>) {
+  let img = ImageBuffer::<Luma<u16>, Vec<u16>>::from_vec(width as u32, height as u32, data.to_vec()).unwrap();
+  img.save_with_format(path.as_ref(), ImageFormat::Tiff).unwrap();
+}
+
+pub fn dump_image_u16_rgb(data: &[u16], width: usize, height: usize, path: impl AsRef<str>) {
+  let img = ImageBuffer::<Rgb<u16>, Vec<u16>>::from_vec(width as u32, height as u32, data.to_vec()).unwrap();
+  img.save_with_format(path.as_ref(), ImageFormat::Tiff).unwrap();
+}
+
+pub fn dump_buf<T>(path: &str, buf: T)
+where
+  T: AsRef<[u8]>,
+{
+  let mut f = BufWriter::new(File::create(path).expect("Unable to create file"));
+  f.write_all(buf.as_ref()).expect("Failed to dump buffer to file");
+  f.flush().expect("Failed to flush file");
+}
+
+pub fn dump_buf_u16<T>(path: &str, buf: T)
+where
+  T: AsRef<[u16]>,
+{
+  let mut f = BufWriter::new(File::create(path).expect("Unable to create file"));
+  for v in buf.as_ref().iter() {
+    f.write_u16::<LittleEndian>(*v).expect("Failed to dump buffer to file");
+  }
+  f.flush().expect("Failed to flush file");
+}