feat(*): add testing CI configuration

This will allow transparent switching between clear names and .DAT names.

.editorconfig

@@ -5,3 +5,7 @@ end_of_line = lf
 insert_final_newline = true
 indent_style = tab
 indent_size = 4
+
+# spefcifically for YAML
+[yml]
+indent_style = space

.github/workflows/ci.yml

@@ -0,0 +1,16 @@
+on:
+ push:
+ pull_request:
+
+jobs:
+    build:
+        strategy:
+            matrix:
+                os: [ubuntu-latest, windows-latest]
+        runs-on: ${{matrix.os}}
+        steps:
+            - uses: actions/checkout@v3
+            - name: Build
+              run: cargo build
+            - name: Test
+              run: cargo test --verbose

Cargo.toml

@@ -2,6 +2,7 @@
 #resolver = "2"
 members = [
 	"crates/jmmt",
-	"crates/jmrenamer"
+	"crates/jmrenamer",
+	"crates/textool"
 #	"crates/paktool"
 ]

crates/jmmt/Cargo.toml

@@ -5,3 +5,5 @@ edition = "2021"
 
 [dependencies]
 binext = "1.0.0"
+image = "0.24.6"
+thiserror = "1.0.40"

crates/jmmt/src/format/mod.rs

@@ -1,9 +1,13 @@
-//! Low-level structure definitions
+//! Low-level file format definitions. These are suitable for usage with the [binext] crate,
+//! which just so happens to be a dependency of this crate! Funny how things work.
 
 pub mod package;
 pub mod package_toc;
+pub mod ps2_palette;
+pub mod ps2_texture;
 
 /// A trait validatable format objects should implement.
+/// TODO: integrate this with some FourCC crate, or re-invent the wheel.
 pub trait Validatable {
 	/// Returns true if the object is valid, false otherwise.
 	fn valid(&self) -> bool;

crates/jmmt/src/format/package.rs

@@ -1,7 +1,7 @@
 //! Package file format structures
 
-use crate::lzss::header::LzssHeader;
 use super::Validatable;
+use crate::lzss::header::LzssHeader;
 
 /// "EOF" header. The QuickBMS script uses this to seek to the PGRP entry.
 #[repr(C)]
@@ -13,11 +13,12 @@ pub struct PackageEofHeader {
 	pub stringtable_size: u32,
 
 	/// Start offset of the [PackageGroup] in the package file.
-	pub header_start_offset: u32
+	pub header_start_offset: u32,
 }
 
 /// A Package Group. I have no idea what this is yet
 #[repr(C)]
+#[derive(Debug, Default)]
 pub struct PackageGroup {
 	pub fourcc: u32,
 
@@ -28,7 +29,7 @@ pub struct PackageGroup {
 	pub group_file_count: u32,
 
 	/// Padding. Set to a fill of 0xCD.
-	pub pad: u32
+	pub pad: u32,
 }
 
 impl PackageGroup {
@@ -44,6 +45,7 @@ impl Validatable for PackageGroup {
 
 /// A package file chunk.
 #[repr(C)]
+#[derive(Debug, Default)]
 pub struct PackageFileChunk {
 	pub fourcc: u32,
 
@@ -85,10 +87,9 @@ pub struct PackageFileChunk {
 	pub file_uncompressed_size: u32,
 
 	/// LZSS header. Only used if the file chunk is compressed.
-	pub lzss_header: LzssHeader
+	pub lzss_header: LzssHeader,
 }
 
-
 impl PackageFileChunk {
 	/// 'PFIL'
 	pub const VALID_FOURCC: u32 = 0x4C494650;

crates/jmmt/src/format/package_toc.rs

@@ -1,5 +1,7 @@
 //! Package.toc structures
 
+use crate::util::make_c_string;
+
 /// An entry inside the `package.toc` file
 #[derive(Debug)]
 #[repr(C)]
@@ -14,23 +16,23 @@ pub struct PackageTocEntry {
 }
 
 impl PackageTocEntry {
-	fn file_name(&self) -> Option<String> {
-		String::from_utf8(self.file_name.to_vec()).ok()
+	pub fn file_name(&self) -> Option<String> {
+		make_c_string(&self.file_name)
 	}
 
-	fn file_name_hash(&self) -> u32 {
+	pub fn file_name_hash(&self) -> u32 {
 		self.file_name_hash
 	}
 
-	fn toc_start_offset(&self) -> u32 {
+	pub fn toc_start_offset(&self) -> u32 {
 		self.toc_start_offset
 	}
 
-	fn toc_size(&self) -> u32 {
+	pub fn toc_size(&self) -> u32 {
 		self.toc_size
 	}
 
-	fn toc_file_count(&self) -> u32 {
+	pub fn toc_file_count(&self) -> u32 {
 		self.toc_file_count
 	}
 }

crates/jmmt/src/format/ps2_palette.rs

@@ -0,0 +1,32 @@
+//! .ps2_palette structures
+
+use super::Validatable;
+
+/// .ps2_palette header
+#[repr(C)]
+#[derive(Debug, Default)]
+pub struct Ps2PaletteHeader {
+	pub fourcc: u32,
+	pub unk: u32,
+	pub unk2: u16,
+
+	pub color_count: u16,
+	pub palette_bpp: u16,
+	pub unk3: u16,
+
+	pub data_start: u32,
+	pub header_size: u32,
+
+	pub pad: [u32; 6], // reserved for game code, like .ps2_texture?
+}
+
+impl Ps2PaletteHeader {
+	/// 'PAL1'
+	pub const VALID_FOURCC: u32 = 0x314c4150;
+}
+
+impl Validatable for Ps2PaletteHeader {
+	fn valid(&self) -> bool {
+		self.fourcc == Self::VALID_FOURCC && self.header_size == 0x18
+	}
+}

crates/jmmt/src/format/ps2_texture.rs

@@ -0,0 +1,38 @@
+//! .ps2_texture structures
+
+use super::Validatable;
+
+/// .ps2_texture header.
+#[repr(C)]
+#[derive(Debug, Default)]
+pub struct Ps2TextureHeader {
+	pub magic: u32,
+	pub unk: u32,
+	pub unk2: u16,
+	pub width: u16,
+	pub height: u16,
+
+	/// bits-per-pixel of the texture data. Anything above 8
+	/// will not have an associated .ps2_palette file,
+	/// since the texture data will not be indirect color.
+	pub bpp: u16,
+
+	/// Data start offset.
+	pub data_start_offset: u32,
+
+	/// Possibly the size of this header.
+	pub header_end_offset: u32,
+
+	pub unk6: [u32; 8], // mostly unrelated values, this is probably padding space for the game code to put stuff
+}
+
+impl Ps2TextureHeader {
+	/// 'TEX1'
+	pub const VALID_FOURCC: u32 = 0x31584554;
+}
+
+impl Validatable for Ps2TextureHeader {
+	fn valid(&self) -> bool {
+		self.magic == Self::VALID_FOURCC && self.header_end_offset == 0x38
+	}
+}

crates/jmmt/src/hash/crc32.rs

@@ -65,9 +65,8 @@ impl Crc32Hash {
 	pub fn update_case_insensitive(&self, data: &[u8]) {
 		for b in data.iter() {
 			let old = self.state.take();
-			self.state.set(
-				CRC32_TABLE[((old ^ (*b & !0x20) as u32) & 0xff) as usize] ^ (old >> 8),
-			);
+			self.state
+				.set(CRC32_TABLE[((old ^ (*b & !0x20) as u32) & 0xff) as usize] ^ (old >> 8));
 		}
 	}
 

crates/jmmt/src/hash/filename.rs

@@ -0,0 +1,24 @@
+//! Utilities for making .DAT and .MET file names
+//!
+//! .DAT and .MET filenames are formatted like "{:X}.DAT" in fmt parlance.
+//! The name component is the CRC32 of the original filename.
+//!
+//! The DAT/MET filename can be a max of 13 characters long.
+
+use super::crc32::hash_string;
+
+/// Make a .DAT filename from a cleartext filename.
+pub fn dat_filename(filename: &str) -> String {
+	format!("{:X}.DAT", hash_string(String::from(filename)))
+}
+
+/// Make a .MET filename from a cleartext filename.
+pub fn met_filename(filename: &str) -> String {
+	format!("{:X}.MET", hash_string(String::from(filename)))
+}
+
+/// Make a .DAT filename from a pre-created hash.
+/// This is notably used to re-use hashes from `package.toc`.
+pub fn dat_filename_from_hash(hash: u32) -> String {
+	format!("{:X}.DAT", hash)
+}

crates/jmmt/src/hash/mod.rs

@@ -1,4 +1,5 @@
 //! Hash Algorithms
 
 pub mod crc32;
+pub mod filename;
 pub use crc32::*;

crates/jmmt/src/lib.rs

@@ -7,6 +7,11 @@ pub mod hash;
 pub mod format;
 pub mod lzss;
 
+pub mod util;
+
 // higher level I/O?
-// pub mod read;
+pub mod read;
 // pub mod write;
+
+// Maybe, using package.toc?
+// pub mod pakfs;

crates/jmmt/src/lzss/header.rs

@@ -1,7 +1,8 @@
-use std::mem::size_of;
 use crate::format::Validatable;
+use std::mem::size_of;
 
 #[repr(C)]
+#[derive(Debug, Default)]
 pub struct LzssHeader {
 	pub next: u32, // ps2 ptr. usually 0 cause theres no next header
 	pub byte_id: u8,

crates/jmmt/src/lzss/mod.rs

@@ -6,4 +6,3 @@
 // 	- if we can't do that, investigate reimplementing compression based on `lzss` crate?
 
 pub mod header;
-

crates/jmmt/src/read/mod.rs

@@ -0,0 +1,5 @@
+//! High-level readers
+
+pub mod package_toc;
+
+pub mod texture;

crates/jmmt/src/read/package_toc.rs

@@ -0,0 +1,45 @@
+use std::fs::File;
+use std::io::{Seek, SeekFrom};
+use std::path::PathBuf;
+
+use crate::format::package_toc::*;
+
+use binext::BinaryRead;
+use thiserror::Error;
+
+#[derive(Error, Debug)]
+pub enum Error {
+	#[error("underlying I/O error: {0}")]
+	IoError(#[from] std::io::Error),
+
+	#[error("file too small to hold package toc entry")]
+	FileTooSmall,
+
+	/// Under-read of data
+	#[error("underread")]
+	ReadTooSmall,
+}
+
+pub type Result<T> = std::result::Result<T, Error>;
+
+pub fn read_package_toc(path: PathBuf) -> Result<Vec<PackageTocEntry>> {
+	let mut toc_file = File::open(path.clone())?;
+
+	let file_size = toc_file.seek(SeekFrom::End(0))?;
+	toc_file.seek(SeekFrom::Start(0))?;
+
+	let vec_size: usize = file_size as usize / std::mem::size_of::<PackageTocEntry>();
+
+	if vec_size == 0 {
+		return Err(Error::FileTooSmall);
+	}
+
+	let mut vec: Vec<PackageTocEntry> = Vec::with_capacity(vec_size);
+
+	for _ in 0..vec_size {
+		vec.push(toc_file.read_binary::<PackageTocEntry>()?);
+	}
+
+	drop(toc_file);
+	Ok(vec)
+}

crates/jmmt/src/read/texture.rs

@@ -0,0 +1,225 @@
+//! High-level .ps2_texture reader
+
+use std::fs::File;
+use std::io::{Read, Seek, SeekFrom};
+use std::path::{Path, PathBuf};
+
+use binext::BinaryRead;
+use thiserror::Error;
+
+use crate::{
+	format::{ps2_palette::*, ps2_texture::*, Validatable},
+	util::Ps2Rgba,
+};
+
+#[derive(Error, Debug)]
+pub enum Error {
+	#[error("underlying I/O error: {0}")]
+	IoError(#[from] std::io::Error),
+
+	/// Invalid texture/palette file header
+	#[error("invalid texture/palette file header")]
+	InvalidHeader,
+
+	/// Couldn't read enough bytes from either texture or palette file
+	#[error("read too few bytes in texture/palette file to complete texture")]
+	ReadTooSmall,
+}
+
+pub type Result<T> = std::result::Result<T, Error>;
+
+/// High-level reader for PS2 textures.
+pub struct Ps2TextureReader {
+	/// The initial path to the .ps2_texture file.
+	path: PathBuf,
+
+	texture_header: Ps2TextureHeader,
+	texture_data: Vec<u8>,
+
+	has_palette: bool,
+	palette_header: Ps2PaletteHeader,
+	palette_data: Vec<u8>,
+}
+
+impl Ps2TextureReader {
+	pub fn new(path: &Path) -> Self {
+		Ps2TextureReader {
+			path: path.to_path_buf(),
+			texture_header: Ps2TextureHeader::default(),
+			texture_data: Vec::default(),
+			has_palette: false,
+			palette_header: Ps2PaletteHeader::default(),
+			palette_data: Vec::default(),
+		}
+	}
+
+	/// Reads texture data into the reader. For most textures, this will mean we open/read
+	/// two files: the .ps2_texture file, and the .ps2_palette file.
+	///
+	/// This function does not parse or convert data, simply reads it for later conversion.
+	/// See [Ps2TextureReader::convert_to_image] for the function which does so.
+	pub fn read_data(&mut self) -> Result<()> {
+		// Open the .ps2_texture file
+		let mut texture_file = File::open(self.path.clone())?;
+
+		self.texture_header = texture_file.read_binary::<Ps2TextureHeader>()?;
+
+		if self.texture_header.valid() {
+			let texture_data_size: usize = ((self.texture_header.width as u32
+				* self.texture_header.height as u32)
+				* (self.texture_header.bpp / 8) as u32) as usize;
+
+			match self.texture_header.bpp {
+				8 => {
+					self.has_palette = true;
+				}
+				_ => {}
+			}
+
+			if self.has_palette {
+				let mut palette_path = self.path.clone();
+
+				// A lot of textures use the texture_<name>.b pattern.
+				// the palette for these is in a palette_<name>.b file, so we need to handle that specifically.
+				if let Some(ext) = self.path.extension() {
+					if ext == "b" {
+						match self.path.file_name() {
+							Some(name) => {
+								if let Some(name) = name.to_str() {
+									palette_path.set_file_name(
+										String::from(name).replace("texture_", "palette_"),
+									);
+								} else {
+									// this is a bad error to return here, but for now it works I guess
+									return Err(Error::InvalidHeader);
+								}
+							}
+							None => {
+								// ditto
+								return Err(Error::InvalidHeader);
+							}
+						}
+					} else {
+						// We can assume this came from a regular .ps2_texture file, and just set the extension.
+						palette_path.set_extension("ps2_palette");
+					}
+				}
+
+				let mut palette_file = File::open(palette_path)?;
+				self.palette_header = palette_file.read_binary::<Ps2PaletteHeader>()?;
+
+				if self.palette_header.valid() {
+					// There are no known files in JMMT which use a non-32bpp palette, so I consider this,
+					// while hacky, a "ok" assumption. if this isn't actually true then Oh Well
+					let pal_data_size = (self.palette_header.color_count * 4) as usize;
+					palette_file.seek(SeekFrom::Start(self.palette_header.data_start as u64))?;
+
+					// Read palette color data
+					self.palette_data.resize(pal_data_size, 0x0);
+					if palette_file.read(self.palette_data.as_mut_slice())? != pal_data_size {
+						return Err(Error::ReadTooSmall);
+					}
+				} else {
+					// I give up
+					return Err(Error::InvalidHeader);
+				}
+			}
+
+			texture_file.seek(SeekFrom::Start(
+				self.texture_header.data_start_offset as u64,
+			))?;
+			self.texture_data.resize(texture_data_size, 0x0);
+
+			if texture_file.read(self.texture_data.as_mut_slice())? != texture_data_size {
+				return Err(Error::ReadTooSmall);
+			}
+		} else {
+			return Err(Error::InvalidHeader);
+		}
+		Ok(())
+	}
+
+	fn palette_rgba_slice(&self) -> &[Ps2Rgba] {
+		assert_eq!(
+			self.palette_header.palette_bpp, 32,
+			"Palette BPP invalid for usage with palette_rgba_slice"
+		);
+
+		// Safety: The palette data buffer will always be 32-bits aligned, so the newly created slice
+		// will not end up reading any memory out of bounds of the Vec<u8> allocation.
+		// We assert this as true before returning.
+		return unsafe {
+			std::slice::from_raw_parts(
+				self.palette_data.as_ptr() as *const Ps2Rgba,
+				self.palette_header.color_count as usize,
+			)
+		};
+	}
+
+	/// Convert the read data into a image implemented by the [image] crate.
+	pub fn convert_to_image(&self) -> image::RgbaImage {
+		let mut image = image::RgbaImage::new(
+			self.texture_header.width as u32,
+			self.texture_header.height as u32,
+		);
+
+		if self.has_palette {
+			let palette_slice: &[Ps2Rgba] = self.palette_rgba_slice();
+
+			// this is shoddy and slow, but meh
+			for x in 0..self.texture_header.width as usize {
+				for y in 0..self.texture_header.height as usize {
+					image[(x as u32, y as u32)] = palette_slice
+						[self.texture_data[y * self.texture_header.width as usize + x] as usize]
+						.to_rgba();
+				}
+			}
+		} else {
+			match self.texture_header.bpp {
+				16 => {
+					let rgb565_slice = unsafe {
+						std::slice::from_raw_parts(
+							self.texture_data.as_ptr() as *const u16,
+							(self.texture_header.width as u32 * self.texture_header.height as u32)
+								as usize,
+						)
+					};
+
+					for x in 0..self.texture_header.width as usize {
+						for y in 0..self.texture_header.height as usize {
+							image[(x as u32, y as u32)] = Ps2Rgba::from_rgb565(
+								rgb565_slice[y * self.texture_header.width as usize + x],
+							)
+							.to_rgba();
+						}
+					}
+				}
+
+				// TODO: Find some less awful way to do this, that can be done without creating a new image object.
+				32 => {
+					let rgba_slice = unsafe {
+						std::slice::from_raw_parts(
+							self.texture_data.as_ptr() as *const Ps2Rgba,
+							(self.texture_header.width as u32 * self.texture_header.height as u32)
+								as usize,
+						)
+					};
+
+					for x in 0..self.texture_header.width as usize {
+						for y in 0..self.texture_header.height as usize {
+							image[(x as u32, y as u32)] =
+								rgba_slice[y * self.texture_header.width as usize + x].to_rgba();
+						}
+					}
+				}
+
+				_ => panic!(
+					"somehow got here with invalid bpp {}",
+					self.texture_header.bpp
+				),
+			}
+		}
+
+		image
+	}
+}

crates/jmmt/src/util/mod.rs

@@ -0,0 +1,57 @@
+//! General utility code, used throughout the JMMT crate
+
+/// Like image::Rgba<u8>, but a safe C repressentation,
+/// and alpha is multiplied to match PS2. Some helpers
+/// are also provided to work with 16-bit colors.
+#[derive(Clone)]
+#[repr(C, packed)]
+pub struct Ps2Rgba {
+	pub r: u8,
+	pub g: u8,
+	pub b: u8,
+	pub a: u8,
+}
+
+impl Ps2Rgba {
+	pub const fn to_rgba(&self) -> image::Rgba<u8> {
+		// avoid multiplication overflow
+		if self.a as u32 * 2 > 255 {
+			return image::Rgba::<u8>([self.r, self.g, self.b, 255]);
+		}
+		image::Rgba::<u8>([self.r, self.g, self.b, self.a * 2])
+	}
+
+	/// Create a instance from an rgb565 16bpp pixel.
+	pub const fn from_rgb565(value: u16) -> Ps2Rgba {
+		return Ps2Rgba {
+			r: ((value & 0x7C00) >> 7) as u8,
+			g: ((value & 0x03E0) >> 2) as u8,
+			b: ((value & 0x001F) << 3) as u8,
+			a: 255,
+		};
+	}
+}
+
+
+/// Make a Rust [String] from a byte slice that came from a C string/structure.
+///
+/// # Usage
+///
+/// The byte slice has to be a valid UTF-8 string.
+/// (Note that in most cases, ASCII strings are valid UTF-8, so this isn't something you'll particularly
+/// have to worry about).
+///
+/// # Safety
+///
+/// This function does not directly make use of any unsafe Rust code.
+pub fn make_c_string(bytes: &[u8]) -> Option<String> {
+	let bytes_without_null = match bytes.iter().position(|&b| b == 0) {
+		Some(ix) => &bytes[..ix],
+		None => bytes,
+	};
+
+	match std::str::from_utf8(bytes_without_null).ok() {
+		Some(string) => Some(String::from(string)),
+		None => None,
+	}
+}

crates/jmrenamer/Cargo.toml

@@ -4,4 +4,5 @@ version = "0.1.0"
 edition = "2021"
 
 [dependencies]
+clap = { version = "4.3.8", features = ["derive"] }
 jmmt = { path = "../jmmt" }

crates/jmrenamer/src/main.rs

@@ -1,74 +1,151 @@
-//! A reimplemntation of jmmt_renamer in Rust.
+//! A reimplementation of jmmt_renamer in Rust.
 //! This program should be run in the root directory
 //! of an extracted (from image) copy of the game.
 
-use std::{fs, io, path::Path};
-use jmmt::hash::hash_string;
+use jmmt::hash::filename::*;
+use jmmt::read::package_toc::read_package_toc;
+use std::{fs, path::Path};
 
-const FILENAME_TABLE : [&str; 20] = [
-		// First loaded by the game
-		"package.toc",
+use clap::{Subcommand, Parser};
 
-		// General packs
-		"config.pak",
 
-		// This file is referenced in the game files,
-		// but doesn't seem to exist anymore in the final build.
-		//"shell.pak",
-	
-		"shell_character_select.pak",
-		"shell_main.pak",
-		"shell_title.pak",
-		"shell_venue.pak",
-		"shell_event.pak",
-		"shell_option.pak",
-		"win_screens.pak",
-	
-		// Game levels
-		"SF_san_fran.pak",
-		"DC_washington.pak",
-		"MK_MT_KILI.pak",
-		"MP_MACHU_PIHU.pak",
-		"LV_Las_Vegas.pak",
-		"AN_ANTARTICA.pak",
-		"NP_Nepal.pak",
-		"TH_TAHOE.pak",
-		"VA_Valdez_alaska.pak",
-		"RV_Rome.pak",
-		"TR_training.pak"
-];
-
-/// Make a .DAT filename from a cleartext filename.
-/// 
-/// .DAT and .MET filenames are formatted like "[hex char * 8].DAT"
-/// The name component is the CRC32 of the original filename.
-///
-/// The DAT/MET filename can be a max of 13 characters long.
-fn hashed_dat_filename(filename: &str) -> String {
-	format!("{:X}.DAT", hash_string(String::from(filename)))
+#[derive(Parser)]
+#[command(author, version, about, long_about = None)]
+#[command(propagate_version = true)]
+struct Cli {
+	#[command(subcommand)]
+	command: Commands,
 }
 
-fn main() -> io::Result<()> {
+#[derive(Subcommand)]
+enum Commands {
+	/// Rename the files in the DATA directory to the original filenames.
+	Clear,
 
-	// A relatively simple idiot-check.
-	if !Path::new("DATA").is_dir() {
-		println!("This program should be run in the root of an extracted copy.");
-		std::process::exit(1);
+	/// Rename the files to the .DAT filenames that the game expects.
+	Unclear,
 }
 
-	for clearname in FILENAME_TABLE.iter() {
-		let dat_filename = hashed_dat_filename(clearname);
-		let dat_src = format!("DATA/{}", dat_filename);
-		let dat_clearname = format!("DATA/{}", String::from(*clearname));
+fn do_clear() {
+	let package_toc_filename = format!("DATA/{}", dat_filename("package.toc"));
 
+	match read_package_toc(Path::new(package_toc_filename.as_str()).to_path_buf()) {
+		Ok(toc) => {
+			for toc_entry in toc {
+				let dat_src = format!(
+					"DATA/{}",
+					dat_filename_from_hash(toc_entry.file_name_hash())
+				);
 				let src_path = Path::new(dat_src.as_str());
+				let dat_clearname = format!(
+					"DATA/{}",
+					toc_entry
+						.file_name()
+						.expect("How did invalid ASCII get here?")
+				);
 				let dest_path = Path::new(dat_clearname.as_str());
 
 				if src_path.exists() {
-			fs::rename(src_path, dest_path)?;
-			println!("moved {} -> {}", src_path.display(), dest_path.display());
+					match fs::rename(src_path, dest_path) {
+						Ok(_) => {}
+						Err(error) => {
+							println!("Error renaming {}: {}", src_path.display(), error);
+							return ();
+						}
+					};
+					println!("Clearnamed {} -> {}", src_path.display(), dest_path.display());
 				}
 			}
 
-	Ok(())
+			match fs::rename(
+				Path::new(package_toc_filename.as_str()),
+				Path::new("DATA/package.toc"),
+			) {
+				Ok(_) => {}
+				Err(error) => {
+					println!("Error renaming TOC file: {}", error);
+					return ();
+				}
+			};
+		}
+
+		Err(error) => {
+			println!("Error reading package.toc file: {}", error);
+			return ();
+		}
+	}
+}
+
+fn do_unclear() {
+	let package_toc_filename = String::from("DATA/package.toc");
+
+	match read_package_toc(Path::new(package_toc_filename.as_str()).to_path_buf()) {
+		Ok(toc) => {
+			for toc_entry in toc {
+
+				let dat_clearname = format!(
+					"DATA/{}",
+					toc_entry
+						.file_name()
+						.expect("How did invalid ASCII get here?")
+				);
+				let src_path = Path::new(dat_clearname.as_str());
+
+
+				let dat_dest = format!(
+					"DATA/{}",
+					dat_filename_from_hash(toc_entry.file_name_hash())
+				);
+				
+				let dest_path = Path::new(dat_dest.as_str());
+
+				if src_path.exists() {
+					match fs::rename(src_path, dest_path) {
+						Ok(_) => {}
+						Err(error) => {
+							println!("Error renaming {}: {}", src_path.display(), error);
+							return ();
+						}
+					};
+					println!("Uncleared {} -> {}", src_path.display(), dest_path.display());
+				}
+			}
+
+			let package_toc_dat_filename = format!("DATA/{}", dat_filename("package.toc"));
+			match fs::rename(
+				Path::new("DATA/package.toc"),
+				Path::new(package_toc_dat_filename.as_str()),
+			) {
+				Ok(_) => {}
+				Err(error) => {
+					println!("Error renaming TOC file: {}", error);
+					return ();
+				}
+			};
+		}
+
+		Err(error) => {
+			println!("Error reading package.toc file: {}", error);
+			return ();
+		}
+	}
+}
+
+fn main() {
+	// A relatively simple idiot-check. Later on utilities might have a shared library
+	// of code which validates game root stuff and can open it up/etc.
+	if !Path::new("DATA").is_dir() {
+		println!("This program should be run in the root of an extracted copy.");
+		return ();
+	}
+
+	let cli = Cli::parse();
+
+
+	match &cli.command {
+		Commands::Clear =>
+			do_clear(),
+		Commands::Unclear => 
+			do_unclear()
+	}
 }

crates/textool/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "textool"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+clap = { version = "4.3.8", features = ["derive"] }
+jmmt = { path = "../jmmt" }

crates/textool/src/main.rs

@@ -0,0 +1,56 @@
+use clap::{Parser, Subcommand};
+
+use jmmt::read::texture::Ps2TextureReader;
+use std::path::Path;
+
+#[derive(Parser)]
+#[command(author, version, about, long_about = None)]
+#[command(propagate_version = true)]
+struct Cli {
+	#[command(subcommand)]
+	command: Commands,
+}
+
+#[derive(Subcommand)]
+enum Commands {
+	/// Exports the texture to a .png file
+	Export { path: String },
+	//Import
+}
+
+fn main() {
+	let cli = Cli::parse();
+
+	match &cli.command {
+		Commands::Export { path } => {
+			let path = Path::new(path);
+
+			if !path.is_file() {
+				println!("Need to provide a path to a file to export.");
+				return ();
+			}
+
+			let mut reader = Ps2TextureReader::new(path);
+
+			match reader.read_data() {
+				Ok(_) => {
+					let mut path = Path::new(path).to_path_buf();
+					path.set_extension("png");
+
+					match reader.convert_to_image().save(path.clone()) {
+						Ok(_) => {
+							println!("Wrote image {}", path.display())
+						}
+						Err(error) => {
+							println!("Error saving image: {}", error);
+						}
+					};
+				}
+				Err(error) => {
+					println!("Error reading texture data: {}", error);
+					return ();
+				}
+			}
+		}
+	}
+}

hexpat/package.hexpat

@@ -30,12 +30,9 @@ struct Lzss_Header {
 	//}
 };
 
-// Data strutures actually part of the file:
-
-// "PGRP" entry.
+// "PGRP" chunk.
 //
 // This marks the start of a "package group".
-// Whatever that is.
 struct JMMT_PGRP {
 	u32 magic;
 	u32 groupNameCrc; // This is in the string table
@@ -43,52 +40,55 @@ struct JMMT_PGRP {
 	u32 pad; // seemingly always 0xCDCDCDCD
 };
 
-// "PFIL" entry.
+// "PFIL" chunk.
 //
-// This represents a file block,
-// which can itself represent either a whole file (> 65535 bytes),
-// or part of a file (which will need to be stiched together).
+// This represents a file chunk,
+// which can itself represent either a whole file (when it is > 65536 bytes),
+// or part of a file (which will need to be stiched together from multiple chunks).
 struct JMMT_PFIL {
 	u32 magic;
 
-	u32 unk[2]; // Don't know what these are?
+	u32 unk; // These two seem to stay the same for every PFIL
+	u32 unk2;
 
 	// Sequence number of the chunk.
 	// This repressents the order of each chunk,
 	// presumably so order can just be whatever.
 	//
-	// However the game seems to order chunks for files
+	// However the packaging tool seems to leave files
 	// in order, and doesn't start/interleave other files
-	// in between. So this is a nice waste of 16 bits.
-	u16 chunkSequenceNumber;
+	// in between. This is definitely still useful, but
+	// not quite as much.
+	u16 chunkNumber;
 
 	// Amount of chunks which need to be read
-	// from to read this file completely.
+	// from to complete this file.
 	//
 	// 1 means this file starts and ends on this chunk.
 	u16 chunkAmount;
 
 	// This is a CRC32 hash of the path of this file.
 	//
-	// Hashed with jmmt::HashString() (in the jmmt_tools repo).
+	// Hashed with jmmt::HashString().
 	u32 filenameCrc;
 
-	u32 unk2[7]; // more unknown stuff I don't care/know about
+	u32 unk3[7]; // These stay the same per file chunk. Could be hashes
 
 	// Uncompressed size of this file chunk. Has a maximum of 65535 bytes.
 	u32 chunkSize;
 
 	// Offset where this file chunk should start,
 	// inside of a larger buffer.
-	u32 blockOffset;
+	u32 bufferOffset;
 
-	// ?
-	u32 unk3;
+	// Compressed size of the chunk.
+	u32 compressedSize;
 
 	// Offset inside of the package file where
 	// the compressed data blob starts.
 	u32 dataOffset;
 
+    // Total file size.
 	u32 fileSize;
 
 	// TECH LZSS header.
@@ -98,12 +98,10 @@ struct JMMT_PFIL {
 	// Debug information. This doesn't print literally everything,
 	// just the useful stuff to look at it.
 	if(1) {
-		std::print("    Chunk seqNum: {}, Filename CRC: {:0x}, File Size: {}, Chunk Size: {}, Block Offset: {}, Data Offset: {}", chunkSequenceNumber, filenameCrc, fileSize, chunkSize, blockOffset, dataOffset);
+		std::print("Hash: {:0x}, Seqnum: {}, ZOff: {}, FileSize: {}, ChunkSize: {}(z {}), BufferOff: {},", 
+		filenameCrc, chunkNumber, dataOffset, fileSize, 
+		chunkSize, compressedSize, bufferOffset );
 	}
-
-	//if(lzHeader.cByteId == 0x91)
-	//	std::print("file has a valid lzss header");
-
 };
 
 // This is a wrapper so we can easily do the chunk viewing in imhex.
@@ -113,10 +111,10 @@ struct PFIL_WRAPPER {
 	JMMT_PFIL pfilChunkZero;
 
 	if(pfilChunkZero.chunkAmount != 1) {
-		std::print("This file has {} chunks", pfilChunkZero.chunkAmount);
+		//std::print("This file has {} chunks", pfilChunkZero.chunkAmount);
 		JMMT_PFIL pfilChunkExtra[pfilChunkZero.chunkAmount - 1];
 	} else {
-		std::print("File ended with 1 chunk");
+		//std::print("File ended with 1 chunk");
 	}
 };
 
@@ -126,6 +124,5 @@ struct PFIL_WRAPPER {
 // Group header.
 JMMT_PGRP grp @ 0xd1c30;
 
-// This isn't right (as one PFIL chunk doesn't actually have to mean one file),
-// but it works for testing and trying to understand the format.
+// All pfil objects. The wrapper expands out other pfil chunks automatically. Pretty cool.
 PFIL_WRAPPER files[grp.nrfiles] @ $;