diff --git a/.github/workflows/build-and-test.yml b/.github/workflows/build-and-test.yml index 2e69ef78..f92a6c08 100644 --- a/.github/workflows/build-and-test.yml +++ b/.github/workflows/build-and-test.yml @@ -33,8 +33,6 @@ jobs: run: cargo install --path mgba-test-runner --verbose - name: Set CARGO_TARGET_DIR run: echo "CARGO_TARGET_DIR=$HOME/target" >> $GITHUB_ENV - - name: Install gbafix - run: cargo install gbafix - uses: extractions/setup-just@v1 - name: Setup mdBook uses: peaceiris/actions-mdbook@v1 diff --git a/.github/workflows/publish-agb.yml b/.github/workflows/publish-agb.yml index fdf8254d..5f715f75 100644 --- a/.github/workflows/publish-agb.yml +++ b/.github/workflows/publish-agb.yml @@ -30,8 +30,6 @@ jobs: API_TOKEN_GITHUB: ${{ secrets.API_TOKEN_GITHUB }} run: bash .github/scripts/update-template-repo.sh - - name: Install gbafix - run: cargo install gbafix - name: Build the examples run: just build-roms - name: Upload examples to the release diff --git a/CHANGELOG.md b/CHANGELOG.md index 4404d6fd..c15cd3ed 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -6,6 +6,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0 ## [Unreleased] +### Added +- Added custom `gbafix` implementation which can take the elf file produced by `cargo build` directly, removing the need for the objcopy step. + ### Changed - Made Vector2D::new a const function. - The template now uses rust 2021 edition by default. diff --git a/README.md b/README.md index 3a6571f8..ed82fb7b 100644 --- a/README.md +++ b/README.md @@ -66,8 +66,6 @@ to just write games for the Game Boy Advance using this library: * Install with `cargo install just` * [mdbook](https://rust-lang.github.io/mdBook/index.html) * Install with `cargo install mdbook` -* [gbafix](https://crates.io/crates/gbafix) - * Install with `cargo install gbafix` With all of this installed, you should be able to run a full build of agb using by running ```sh @@ -119,9 +117,11 @@ agb would not be possible without the help from the following (non-exhaustive) l ## Licence -agb and all its subcrates are released under MPL version 2.0. See full 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. 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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/main.rs b/agb-gbafix/src/main.rs new file mode 100644 index 00000000..09a3861a --- /dev/null +++ b/agb-gbafix/src/main.rs @@ -0,0 +1,148 @@ +use anyhow::{anyhow, bail, ensure, Result}; +use clap::{arg, value_parser}; + +use std::{ + fs, + io::{BufWriter, Write}, + path::PathBuf, +}; + +fn main() -> Result<()> { + let matches = clap::Command::new("agb-gbafix") + .about("Convert elf files directly to a valid GBA ROM") + .arg(arg!( "Input elf file").value_parser(value_parser!(PathBuf))) + .arg(arg!(-o --output "Set output file, defaults to replacing INPUT's extension to .gba").value_parser(value_parser!(PathBuf))) + .arg(arg!(-t --title "Set the title. At most 12 bytes. Defaults to truncating the input file name")) + .arg(arg!(-c --gamecode <GAME_CODE> "Sets the game code, 4 bytes")) + .arg(arg!(-m --makercode <MAKER_CODE> "Set the maker code, 2 bytes")) + .arg(arg!(-r --gameversion <VERSION> "Set the version of the game, 0-255").value_parser(value_parser!(u8))) + .arg(arg!(-p --padding "Ignored for compatibility with gbafix")) + .get_matches(); + + let input = matches.get_one::<PathBuf>("INPUT").unwrap(); + let output = match matches.get_one::<PathBuf>("output") { + Some(output) => output.clone(), + None => input.with_extension("gba"), + }; + + let mut header = gbafix::GBAHeader::default(); + + { + let title = if let Some(title) = matches.get_one::<String>("title") { + title.clone() + } else { + let title = input + .file_stem() + .ok_or_else(|| anyhow!("Invalid filename {}", input.to_string_lossy()))? + .to_string_lossy(); + title.into_owned() + }; + + for (i, &c) in title.as_bytes().iter().enumerate().take(12) { + header.title[i] = c; + } + } + + if let Some(maker_code) = matches.get_one::<String>("makercode") { + let maker_code = maker_code.as_bytes(); + if maker_code.len() > 2 { + bail!( + "Maker code must be at most 2 bytes, got {}", + maker_code.len() + ); + } + + header.maker_code = [ + *maker_code.first().unwrap_or(&0), + *maker_code.get(1).unwrap_or(&0), + ]; + } + + if let Some(game_version) = matches.get_one::<u8>("gameversion") { + header.version = *game_version; + } + + if let Some(game_code) = matches.get_one::<String>("gamecode") { + for (i, &c) in game_code.as_bytes().iter().enumerate().take(4) { + header.game_code[i] = c; + } + } + + 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)?; + + output.flush()?; + + Ok(()) +} + +fn write_gba_file<W: Write>( + input: &[u8], + mut header: gbafix::GBAHeader, + output: &mut W, +) -> Result<()> { + let elf_file = elf::ElfBytes::<elf::endian::AnyEndian>::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(()) +} diff --git a/book/src/setup/building.md b/book/src/setup/building.md index 0358c76e..d88b9e53 100644 --- a/book/src/setup/building.md +++ b/book/src/setup/building.md @@ -30,30 +30,21 @@ Depending on your platform, the file will have either a `.elf` extension or no e ## 3. Convert the binary to a GBA file In order to run the game on an emulator, we need to convert the binary file to a GBA file. -To do this, we'll use two tools: `arm-none-eabi-objcopy` and `gbafix`. +To do this, we'll use the tool `agb-gbafix`. -Run the following command to convert the binary file to a GBA file: +Run the following command to convert the binary file to a GBA ROM: ```sh -arm-none-eabi-objcopy -O binary target/thumbv4t-none-eabi/release/template template.gba +agb-gbafix target/thumbv4t-none-eabi/release/template -o template.gba ``` or ```sh -arm-none-eabi-objcopy -O binary target/thumbv4t-none-eabi/release/template.elf template.gba +agb-gbafix target/thumbv4t-none-eabi/release/template.elf -o template.gba ``` -Depending on whether your file has the .elf extension. -This command will create a template.gba file in the template directory. - -Next, run the following command to fix the GBA header: - -```sh -gbafix template.gba -``` - -This command will add the correct GBA header to the template.gba file. +This command will add the correct GBA header to the template.gba file and it will be playable on real hardware or an emulator. ## 4. Run the game diff --git a/book/src/setup/linux.md b/book/src/setup/linux.md index 0c4c6574..f96557f0 100644 --- a/book/src/setup/linux.md +++ b/book/src/setup/linux.md @@ -25,8 +25,8 @@ The source code for the game is hosted on github, so you will need to install gi # 4. gbafix -In order to be able to play games made with agb on real hardware or on some emulators, you will need to install 'gbafix'. -The rust implementation can be installed very easily using `cargo install gbafix`. +In order to be able to play games made with agb on real hardware or on some emulators, you will need to install 'agb-gbafix'. +Agb's implementation can be installed very easily using `cargo install agb-gbafix`. Make sure that the Cargo bin directory is in your `PATH` as we'll need to use it later. diff --git a/book/src/setup/mac.md b/book/src/setup/mac.md index a03248ca..510765e3 100644 --- a/book/src/setup/mac.md +++ b/book/src/setup/mac.md @@ -43,8 +43,8 @@ After installing to your `/Applications` folder you can add the binary to your p # 5. Real hardware - gbafix -In order to be able to play games made with agb on real hardware or on some emulators, you will need to install 'gbafix'. -The rust implementation can be installed very easily using `cargo install gbafix`. +In order to be able to play games made with agb on real hardware or on some emulators, you will need to install 'agb-gbafix'. +Agb's implementation can be installed very easily using `cargo install agb-gbafix`. Make sure that the Cargo bin directory is in your `PATH` as we'll need to use it later. diff --git a/justfile b/justfile index d901cce2..032849cb 100644 --- a/justfile +++ b/justfile @@ -105,11 +105,13 @@ _build-rom folder name: mkdir -p examples/target/examples - arm-none-eabi-objcopy -O binary "$TARGET_FOLDER/thumbv4t-none-eabi/release/$GAME_NAME" "$GBA_FILE" - gbafix -p "-t${INTERNAL_NAME:0:12}" "-c${INTERNAL_NAME:0:4}" -mGC "$GBA_FILE" + just gbafix --title "${INTERNAL_NAME:0:12}" --gamecode "${INTERNAL_NAME:0:4}" --makercode GC "$TARGET_FOLDER/thumbv4t-none-eabi/release/$GAME_NAME" -o "$GBA_FILE" cp -v "$GBA_FILE" "examples/target/examples/$GAME_NAME.gba" +gbafix *args: + (cd agb-gbafix && cargo run --release -- {{args}}) + _all-crates target: for CARGO_PROJECT_FILE in agb-*/Cargo.toml agb/Cargo.toml; do \ PROJECT_DIR=$(dirname "$CARGO_PROJECT_FILE"); \ diff --git a/template/README.md b/template/README.md index 423ea1e4..2d488275 100644 --- a/template/README.md +++ b/template/README.md @@ -22,8 +22,8 @@ You will also want to install an emulator. The best support in agb is with [mgba `println!` support via `agb::println!` but any emulator should work. You'll get the best experience if `mgba-qt` is in your `PATH`. -If you want to run your game on real hardware, you will also need to install `gbafix` which you can do after installing -rust with the following: `cargo install gbafix`. This is not required if you are only running your game in an emulator. +If you want to run your game on real hardware, you will also need to install `agb-gbafix` which you can do after installing +rust with the following: `cargo install agb-gbafix`. This is not required if you are only running your game in an emulator. ### Running in an emulator @@ -68,6 +68,5 @@ running on the real thing. First build the binary in release mode using the instructions above, then do the following: ```sh -arm-none-eabi-objcopy -O binary target/thumbv4t-none-eabi/release/<your game> <your game>.gba -gbafix <your game>.gba +agb-gbafix target/thumbv4t-none-eabi/release/<your game> -o <your game>.gba ``` \ No newline at end of file