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/preprocessing/mod.rs

@@ -0,0 +1,3 @@
+pub mod scale_to_16bit;
+pub mod scale_white_balance;
+pub mod subtract_black;

libraries/rawkit/src/preprocessing/scale_to_16bit.rs

@@ -0,0 +1,15 @@
+use crate::{RawImage, RawPixel, SubtractBlack};
+
+impl RawImage {
+	pub fn scale_to_16bit_fn(&self) -> impl Fn(RawPixel) -> u16 {
+		let black_level = match self.black {
+			SubtractBlack::CfaGrid(x) => x,
+			_ => unreachable!(),
+		};
+
+		let maximum = self.maximum - black_level.iter().max().unwrap();
+		let scale_to_16bit_multiplier = if maximum > 0 { u16::MAX as f64 / maximum as f64 } else { 1. };
+
+		move |pixel: RawPixel| ((pixel.value as f64) * scale_to_16bit_multiplier).min(u16::MAX as f64).max(0.) as u16
+	}
+}

libraries/rawkit/src/preprocessing/scale_white_balance.rs

@@ -0,0 +1,31 @@
+use crate::{RawImage, RawPixel};
+
+impl RawImage {
+	pub fn scale_white_balance_fn(&self) -> impl Fn(RawPixel) -> u16 {
+		let Some(mut white_balance) = self.white_balance else { todo!() };
+
+		if white_balance[1] == 0. {
+			white_balance[1] = 1.;
+		}
+
+		// TODO: Move this at its correct location when highlights are implemented correctly.
+		let highlight = 0;
+
+		let normalization_factor = if highlight == 0 {
+			white_balance.into_iter().fold(f64::INFINITY, f64::min)
+		} else {
+			white_balance.into_iter().fold(f64::NEG_INFINITY, f64::max)
+		};
+
+		let normalized_white_balance = if normalization_factor > 0.00001 {
+			white_balance.map(|x| x / normalization_factor)
+		} else {
+			[1., 1., 1., 1.]
+		};
+
+		move |pixel: RawPixel| {
+			let cfa_index = 2 * (pixel.row % 2) + (pixel.column % 2);
+			((pixel.value as f64) * normalized_white_balance[cfa_index]).min(u16::MAX as f64).max(0.) as u16
+		}
+	}
+}

libraries/rawkit/src/preprocessing/subtract_black.rs

@@ -0,0 +1,11 @@
+use crate::RawPixel;
+use crate::{RawImage, SubtractBlack};
+
+impl RawImage {
+	pub fn subtract_black_fn(&self) -> impl Fn(RawPixel) -> u16 {
+		match self.black {
+			SubtractBlack::CfaGrid(black_levels) => move |pixel: RawPixel| pixel.value.saturating_sub(black_levels[2 * (pixel.row % 2) + (pixel.column % 2)]),
+			_ => todo!(),
+		}
+	}
+}