Rename Raw-rs to Rawkit (#2088)

* Rename within files

* Rename in CI

* Rename the folder and file names

* Rename raw_rs to rawkit

* Add example to README

* Add initial documentation

* Small API changes and extra documentation

* Bump versions and stuff

* Readme improvements

* Merge proc-macro crates into one

* Add README to rawkit-proc-macros

* Remove keywords and categories

* Add licenses to rawkit-proc-macros

---------

Co-authored-by: Keavon Chambers <keavon@keavon.com>

libraries/rawkit/src/tiff/values.rs

@@ -0,0 +1,79 @@
+pub trait ToFloat {
+	fn to_float(&self) -> f64;
+}
+
+impl ToFloat for u32 {
+	fn to_float(&self) -> f64 {
+		*self as f64
+	}
+}
+
+impl ToFloat for i32 {
+	fn to_float(&self) -> f64 {
+		*self as f64
+	}
+}
+
+pub struct Rational<T: ToFloat> {
+	pub numerator: T,
+	pub denominator: T,
+}
+
+impl<T: ToFloat> ToFloat for Rational<T> {
+	fn to_float(&self) -> f64 {
+		self.numerator.to_float() / self.denominator.to_float()
+	}
+}
+
+pub struct CurveLookupTable {
+	table: Vec<u16>,
+}
+
+impl CurveLookupTable {
+	pub fn from_sony_tone_table(values: [u16; 4]) -> CurveLookupTable {
+		let mut sony_curve = [0, 0, 0, 0, 0, 4095];
+		for i in 0..4 {
+			sony_curve[i + 1] = values[i] >> 2 & 0xfff;
+		}
+
+		let mut table = vec![0_u16; (sony_curve[5] + 1).into()];
+		for i in 0..5 {
+			for j in (sony_curve[i] + 1)..=sony_curve[i + 1] {
+				table[j as usize] = table[(j - 1) as usize] + (1 << i);
+			}
+		}
+
+		CurveLookupTable { table }
+	}
+
+	pub fn get(&self, x: usize) -> u16 {
+		self.table[x]
+	}
+}
+
+#[derive(Copy, Clone, Eq, PartialEq)]
+pub enum Transform {
+	Horizontal,
+	MirrorHorizontal,
+	Rotate180,
+	MirrorVertical,
+	MirrorHorizontalRotate270,
+	Rotate90,
+	MirrorHorizontalRotate90,
+	Rotate270,
+}
+
+impl Transform {
+	pub fn is_identity(&self) -> bool {
+		*self == Transform::Horizontal
+	}
+
+	pub fn will_swap_coordinates(&self) -> bool {
+		use Transform as Tr;
+
+		match *self {
+			Tr::Horizontal | Tr::MirrorHorizontal | Tr::Rotate180 | Tr::MirrorVertical => false,
+			Tr::MirrorHorizontalRotate270 | Tr::Rotate90 | Tr::MirrorHorizontalRotate90 | Tr::Rotate270 => true,
+		}
+	}
+}