diff --git a/CHANGELOG.md b/CHANGELOG.md index 4f8394bd..f89c6d3e 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -15,6 +15,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0 ### Changed - Sound channel panning and volume options are now `Num` rather than `Num` for improved precision and sound quality. +- Due to dependency changes, agb-gbafix is now released under MPL rather than GPL. ### Fixed diff --git a/README.md b/README.md index ff9403d4..feed710f 100644 --- a/README.md +++ b/README.md @@ -117,10 +117,7 @@ agb would not be possible without the help from the following (non-exhaustive) l ## Licence -agb and all its subcrates (except agb-gbafix) are released under MPL version 2.0. See full licence -text in the `LICENSE` file. - -agb-gbafix is released under GPL version 3.0. See the full licence in the agb-gbafix/LICENSE file +agb and all its subcrates are released under MPL version 2.0. See full licence text in the `LICENSE` file. agb contains a subset of the code from [agbabi](https://github.com/felixjones/agbabi) which is released under a zlib style licence, details for which you can find under `agb/src/agbabi`. diff --git a/agb-gbafix/Cargo.lock b/agb-gbafix/Cargo.lock index 9d46ae05..262ea5d4 100644 --- a/agb-gbafix/Cargo.lock +++ b/agb-gbafix/Cargo.lock @@ -7,10 +7,8 @@ name = "agb-gbafix" version = "0.16.0" dependencies = [ "anyhow", - "bytemuck", "clap", "elf", - "gbafix", ] [[package]] @@ -74,12 +72,6 @@ version = "2.3.3" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "630be753d4e58660abd17930c71b647fe46c27ea6b63cc59e1e3851406972e42" -[[package]] -name = "bytemuck" -version = "1.13.1" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "17febce684fd15d89027105661fec94afb475cb995fbc59d2865198446ba2eea" - [[package]] name = "cc" version = "1.0.79" @@ -146,15 +138,6 @@ dependencies = [ "libc", ] -[[package]] -name = "gbafix" -version = "1.0.4" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "f7e47af9d5377b8b0def53d9916f6c28521f2e5b97c5fec137797417c26ab4b7" -dependencies = [ - "bytemuck", -] - [[package]] name = "hermit-abi" version = "0.3.1" diff --git a/agb-gbafix/Cargo.toml b/agb-gbafix/Cargo.toml index 18b27db9..99eb7c96 100644 --- a/agb-gbafix/Cargo.toml +++ b/agb-gbafix/Cargo.toml @@ -9,8 +9,6 @@ repository = "https://github.com/agbrs/agb" [dependencies] elf = "0.7" -gbafix = "1" -bytemuck = "1" anyhow = "1" clap = "4" diff --git a/agb-gbafix/LICENSE b/agb-gbafix/LICENSE deleted file mode 100644 index f288702d..00000000 --- a/agb-gbafix/LICENSE +++ /dev/null @@ -1,674 +0,0 @@ - GNU GENERAL PUBLIC LICENSE - Version 3, 29 June 2007 - - Copyright (C) 2007 Free Software Foundation, Inc. - Everyone is permitted to copy and distribute verbatim copies - of this license document, but changing it is not allowed. - - Preamble - - The GNU General Public License is a free, copyleft license for -software and other kinds of works. - - The licenses for most software and other practical works are designed -to take away your freedom to share and change the works. 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It is safest -to attach them to the start of each source file to most effectively -state the exclusion of warranty; and each file should have at least -the "copyright" line and a pointer to where the full notice is found. - - - Copyright (C) - - This program is free software: you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation, either version 3 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program. If not, see . - -Also add information on how to contact you by electronic and paper mail. - - If the program does terminal interaction, make it output a short -notice like this when it starts in an interactive mode: - - Copyright (C) - This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. - This is free software, and you are welcome to redistribute it - under certain conditions; type `show c' for details. - -The hypothetical commands `show w' and `show c' should show the appropriate -parts of the General Public License. Of course, your program's commands -might be different; for a GUI interface, you would use an "about box". - - You should also get your employer (if you work as a programmer) or school, -if any, to sign a "copyright disclaimer" for the program, if necessary. -For more information on this, and how to apply and follow the GNU GPL, see -. - - The GNU General Public License does not permit incorporating your program -into proprietary programs. If your program is a subroutine library, you -may consider it more useful to permit linking proprietary applications with -the library. If this is what you want to do, use the GNU Lesser General -Public License instead of this License. But first, please read -. diff --git a/agb-gbafix/src/lib.rs b/agb-gbafix/src/lib.rs new file mode 100644 index 00000000..36b0389f --- /dev/null +++ b/agb-gbafix/src/lib.rs @@ -0,0 +1,135 @@ +use anyhow::{anyhow, bail, ensure, Result}; +use std::io::Write; + +const GBA_HEADER_SIZE: usize = 192; + +const NINTENDO_LOGO: &[u8] = &[ + 0x24, 0xFF, 0xAE, 0x51, 0x69, 0x9A, 0xA2, 0x21, 0x3D, 0x84, 0x82, 0x0A, 0x84, 0xE4, 0x09, 0xAD, + 0x11, 0x24, 0x8B, 0x98, 0xC0, 0x81, 0x7F, 0x21, 0xA3, 0x52, 0xBE, 0x19, 0x93, 0x09, 0xCE, 0x20, + 0x10, 0x46, 0x4A, 0x4A, 0xF8, 0x27, 0x31, 0xEC, 0x58, 0xC7, 0xE8, 0x33, 0x82, 0xE3, 0xCE, 0xBF, + 0x85, 0xF4, 0xDF, 0x94, 0xCE, 0x4B, 0x09, 0xC1, 0x94, 0x56, 0x8A, 0xC0, 0x13, 0x72, 0xA7, 0xFC, + 0x9F, 0x84, 0x4D, 0x73, 0xA3, 0xCA, 0x9A, 0x61, 0x58, 0x97, 0xA3, 0x27, 0xFC, 0x03, 0x98, 0x76, + 0x23, 0x1D, 0xC7, 0x61, 0x03, 0x04, 0xAE, 0x56, 0xBF, 0x38, 0x84, 0x00, 0x40, 0xA7, 0x0E, 0xFD, + 0xFF, 0x52, 0xFE, 0x03, 0x6F, 0x95, 0x30, 0xF1, 0x97, 0xFB, 0xC0, 0x85, 0x60, 0xD6, 0x80, 0x25, + 0xA9, 0x63, 0xBE, 0x03, 0x01, 0x4E, 0x38, 0xE2, 0xF9, 0xA2, 0x34, 0xFF, 0xBB, 0x3E, 0x03, 0x44, + 0x78, 0x00, 0x90, 0xCB, 0x88, 0x11, 0x3A, 0x94, 0x65, 0xC0, 0x7C, 0x63, 0x87, 0xF0, 0x3C, 0xAF, + 0xD6, 0x25, 0xE4, 0x8B, 0x38, 0x0A, 0xAC, 0x72, 0x21, 0xD4, 0xF8, 0x07, +]; + +#[derive(Debug, Default)] +pub struct GbaHeader { + pub start_code: [u8; 4], + pub game_title: [u8; 12], + pub game_code: [u8; 4], + pub maker_code: [u8; 2], + pub software_version: u8, +} + +impl GbaHeader { + fn produce_header(&self) -> Vec { + let mut header_result = vec![]; + + header_result.extend_from_slice(&self.start_code); + header_result.extend_from_slice(NINTENDO_LOGO); + header_result.extend_from_slice(&self.game_title); + header_result.extend_from_slice(&self.game_code); + header_result.extend_from_slice(&self.maker_code); + header_result.push(0x96); // must be 96 + header_result.push(0); // main unit code (0 for current GBA models) + header_result.push(0); // device type, usually 0 + header_result.extend_from_slice(&[0; 7]); // reserved area, should be zero filled + header_result.push(self.software_version); + + let checksum = Self::calculate_checksum(&header_result); + header_result.push(checksum); // checksum + header_result.extend_from_slice(&[0; 2]); // reserved area, should be zero filled + + assert_eq!(header_result.len(), GBA_HEADER_SIZE); + + header_result + } + + fn calculate_checksum(header: &[u8]) -> u8 { + let mut chk = 0u8; + for value in header.iter().take(0xBC).skip(0xA0) { + chk = chk.wrapping_sub(*value); + } + + chk = chk.wrapping_sub(0x19); + chk + } +} + +#[derive(Debug, Clone, Copy, Default, PartialEq, Eq)] +pub enum PaddingBehaviour { + Pad, + #[default] + DoNotPad, +} + +pub fn write_gba_file( + input: &[u8], + mut header: GbaHeader, + padding_behaviour: PaddingBehaviour, + output: &mut W, +) -> Result<()> { + let elf_file = elf::ElfBytes::::minimal_parse(input)?; + + let section_headers = elf_file + .section_headers() + .ok_or_else(|| anyhow!("Failed to parse as elf file"))?; + + let mut bytes_written = 0; + for section_header in section_headers.iter() { + const SHT_NOBITS: u32 = 8; + const SHT_NULL: u32 = 0; + const SHF_ALLOC: u64 = 2; + + if (section_header.sh_type == SHT_NOBITS || section_header.sh_type == SHT_NULL) + || section_header.sh_flags & SHF_ALLOC == 0 + { + continue; + } + + let align = bytes_written % section_header.sh_addralign; + if align != 0 { + for _ in 0..(section_header.sh_addralign - align) { + output.write_all(&[0])?; + bytes_written += 1; + } + } + + let (mut data, compression) = elf_file.section_data(§ion_header)?; + if let Some(compression) = compression { + bail!("Cannot decompress elf content, but got compression header {compression:?}"); + } + + if bytes_written == 0 { + ensure!( + data.len() > GBA_HEADER_SIZE, + "first section must be at least as big as the gba header" + ); + + header.start_code = data[0..4].try_into().unwrap(); + + let header_bytes = header.produce_header(); + output.write_all(&header_bytes)?; + + data = &data[GBA_HEADER_SIZE..]; + bytes_written += GBA_HEADER_SIZE as u64; + } + + output.write_all(data)?; + bytes_written += data.len() as u64; + } + + if !bytes_written.is_power_of_two() && padding_behaviour == PaddingBehaviour::Pad { + let required_padding = bytes_written.next_power_of_two() - bytes_written; + + for _ in 0..required_padding { + output.write_all(&[0])?; + } + } + + Ok(()) +} diff --git a/agb-gbafix/src/main.rs b/agb-gbafix/src/main.rs index 09a3861a..3ae0f25c 100644 --- a/agb-gbafix/src/main.rs +++ b/agb-gbafix/src/main.rs @@ -1,4 +1,4 @@ -use anyhow::{anyhow, bail, ensure, Result}; +use anyhow::{anyhow, bail, Result}; use clap::{arg, value_parser}; use std::{ @@ -7,6 +7,8 @@ use std::{ path::PathBuf, }; +use agb_gbafix::{write_gba_file, GbaHeader, PaddingBehaviour}; + fn main() -> Result<()> { let matches = clap::Command::new("agb-gbafix") .about("Convert elf files directly to a valid GBA ROM") @@ -16,7 +18,7 @@ fn main() -> Result<()> { .arg(arg!(-c --gamecode "Sets the game code, 4 bytes")) .arg(arg!(-m --makercode "Set the maker code, 2 bytes")) .arg(arg!(-r --gameversion "Set the version of the game, 0-255").value_parser(value_parser!(u8))) - .arg(arg!(-p --padding "Ignored for compatibility with gbafix")) + .arg(arg!(-p --padding "Pad the ROM to the next power of 2 in size")) .get_matches(); let input = matches.get_one::("INPUT").unwrap(); @@ -25,7 +27,7 @@ fn main() -> Result<()> { None => input.with_extension("gba"), }; - let mut header = gbafix::GBAHeader::default(); + let mut header = GbaHeader::default(); { let title = if let Some(title) = matches.get_one::("title") { @@ -39,7 +41,7 @@ fn main() -> Result<()> { }; for (i, &c) in title.as_bytes().iter().enumerate().take(12) { - header.title[i] = c; + header.game_title[i] = c; } } @@ -59,7 +61,7 @@ fn main() -> Result<()> { } if let Some(game_version) = matches.get_one::("gameversion") { - header.version = *game_version; + header.software_version = *game_version; } if let Some(game_code) = matches.get_one::("gamecode") { @@ -68,81 +70,19 @@ fn main() -> Result<()> { } } + let pad = matches.get_flag("padding"); + let pad = if pad { + PaddingBehaviour::Pad + } else { + PaddingBehaviour::DoNotPad + }; + let mut output = BufWriter::new(fs::File::create(output)?); let file_data = fs::read(input)?; - write_gba_file(file_data.as_slice(), header, &mut output)?; + write_gba_file(file_data.as_slice(), header, pad, &mut output)?; output.flush()?; Ok(()) } - -fn write_gba_file( - input: &[u8], - mut header: gbafix::GBAHeader, - output: &mut W, -) -> Result<()> { - let elf_file = elf::ElfBytes::::minimal_parse(input)?; - - let section_headers = elf_file - .section_headers() - .ok_or_else(|| anyhow!("Failed to parse as elf file"))?; - - let mut bytes_written = 0; - for section_header in section_headers.iter() { - const SHT_NOBITS: u32 = 8; - const SHT_NULL: u32 = 0; - const SHF_ALLOC: u64 = 2; - - if (section_header.sh_type == SHT_NOBITS || section_header.sh_type == SHT_NULL) - || section_header.sh_flags & SHF_ALLOC == 0 - { - continue; - } - - let align = bytes_written % section_header.sh_addralign; - if align != 0 { - for _ in 0..(section_header.sh_addralign - align) { - output.write_all(&[0])?; - bytes_written += 1; - } - } - - let (mut data, compression) = elf_file.section_data(§ion_header)?; - if let Some(compression) = compression { - bail!("Cannot decompress elf content, but got compression header {compression:?}"); - } - - if bytes_written == 0 { - const GBA_HEADER_SIZE: usize = 192; - - ensure!( - data.len() > GBA_HEADER_SIZE, - "first section must be at least as big as the gba header" - ); - - header.start_code = data[0..4].try_into().unwrap(); - header.update_checksum(); - - let header_bytes = bytemuck::bytes_of(&header); - output.write_all(header_bytes)?; - - data = &data[GBA_HEADER_SIZE..]; - bytes_written += GBA_HEADER_SIZE as u64; - } - - output.write_all(data)?; - bytes_written += data.len() as u64; - } - - if !bytes_written.is_power_of_two() { - let required_padding = bytes_written.next_power_of_two() - bytes_written; - - for _ in 0..required_padding { - output.write_all(&[0])?; - } - } - - Ok(()) -}