feat/jni: Add rustboyadvance-jni crate to export some simple JNI bindings

Former-commit-id: d4e7a622a97215a8c1b7b50bb7f08d18cb9c5716
This commit is contained in:
Michel Heily 2020-02-23 00:25:50 +02:00 committed by MishMish
parent 778274b5ae
commit d938767430
4 changed files with 179 additions and 2 deletions

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@ -8,6 +8,7 @@ edition = "2018"
members = [ members = [
"rustboyadvance-sdl2", "rustboyadvance-sdl2",
"rustboyadvance-minifb", "rustboyadvance-minifb",
"rustboyadvance-jni",
] ]
[dependencies] [dependencies]
@ -24,7 +25,7 @@ hexdump = "0.1.0"
time = "0.2.6" time = "0.2.6"
bitfield = "0.13.1" bitfield = "0.13.1"
bitflags = "1.2.1" bitflags = "1.2.1"
zip = "0.5.4" zip = {version = "0.5.4", default-features = false, features = ["deflate", "time"]}
ctrlc = "3.1.3" ctrlc = "3.1.3"
bit-set = "0.5.1" bit-set = "0.5.1"
debug_stub_derive = "0.3.0" debug_stub_derive = "0.3.0"

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@ -0,0 +1,16 @@
[package]
name = "rustboyadvance-jni"
version = "0.1.0"
authors = ["Michel Heily <michelheily@gmail.com>"]
edition = "2018"
description = "JNI bindings for rustboyadvance core"
publish = false
[lib]
crate-type = ["staticlib", "cdylib"]
[dependencies]
rustboyadvance-ng = {path = "../"}
jni = { version = "0.14", default-features = false }
log = "0.4.8"
env_logger = "0.7.1"

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@ -0,0 +1,159 @@
/// JNI Bindings to rustboyadvance
/// For use with the following java class
///
/// package com.mrmichel.rustboyadvance;
////
/// public class EmulatorInterface {
///
/// public static native int loadRom(String romPath);
///
/// public static native int openEmulator(String biosPath);
///
/// public static native void closeEmulator();
///
/// public static native int runFrame(int[] frame_buffer);
///
/// static {
/// System.loadLibrary("rustboyadvance_jni");
/// }
/// }
use std::cell::RefCell;
use std::os::raw::c_void;
use std::rc::Rc;
#[macro_use]
extern crate log;
use env_logger;
use rustboyadvance_ng::prelude::*;
struct Hardware {
frame_buffer: [u32; DISPLAY_WIDTH * DISPLAY_HEIGHT],
}
impl Hardware {
fn new() -> Hardware {
Hardware {
frame_buffer: [0; DISPLAY_WIDTH * DISPLAY_HEIGHT],
}
}
}
impl VideoInterface for Hardware {
fn render(&mut self, buffer: &[u32]) {
self.frame_buffer[..].clone_from_slice(buffer);
}
}
impl AudioInterface for Hardware {}
impl InputInterface for Hardware {}
struct Emulator {
hwif: Rc<RefCell<Hardware>>,
gba: GameBoyAdvance,
}
#[allow(non_snake_case)]
pub mod android {
use super::*;
use std::path::Path;
use jni;
use jni::objects::{JClass, JString};
use jni::sys::{jint, jintArray, JNI_VERSION_1_6};
use jni::{JNIEnv, JavaVM};
static mut EMULATOR: Option<Emulator> = None;
static mut ROM: Option<Cartridge> = None;
#[no_mangle]
pub unsafe extern "C" fn JNI_OnLoad(_vm: *mut JavaVM, _reserved: *mut c_void) -> jint {
env_logger::init();
debug!("library loaded!");
JNI_VERSION_1_6
}
#[no_mangle]
pub unsafe extern "C" fn Java_com_mrmichel_rustboyadvance_EmulatorInterface_loadRom(
env: JNIEnv,
_: JClass,
rom_path: JString,
) -> jint {
if EMULATOR.is_some() {
error!("can't load rom while emulator is running");
return -1;
}
let rom_path: String = env
.get_string(rom_path)
.expect("invalid rom path object")
.into();
let gamepak = GamepakBuilder::new()
.file(&Path::new(&rom_path))
.build()
.expect("failed to load rom");
info!("Loaded ROM file {:?}", gamepak.header);
ROM = Some(gamepak);
0
}
#[no_mangle]
pub unsafe extern "C" fn Java_com_mrmichel_rustboyadvance_EmulatorInterface_openEmulator(
env: JNIEnv,
_: JClass,
bios_path: JString,
) -> jint {
if let Some(cartridge) = ROM.clone() {
let bios_path: String = env
.get_string(bios_path)
.expect("invalid bios path object")
.into();
let hw = Rc::new(RefCell::new(Hardware::new()));
let bios_rom = read_bin_file(&Path::new(&bios_path)).expect("failed to load bios file");
EMULATOR = Some(Emulator {
hwif: hw.clone(),
gba: GameBoyAdvance::new(bios_rom, cartridge, hw.clone(), hw.clone(), hw.clone()),
});
return 0;
} else {
error!("please call loadRom first");
return -1;
}
}
#[no_mangle]
pub unsafe extern "C" fn Java_com_mrmichel_rustboyadvance_EmulatorInterface_closeEmulator(
env: JNIEnv,
_: JClass,
) {
EMULATOR = None;
}
#[no_mangle]
pub unsafe extern "C" fn Java_com_mrmichel_rustboyadvance_EmulatorInterface_runFrame(
env: JNIEnv,
_: JClass,
frame_buffer: jintArray,
) -> jint {
if let Some(emu) = &mut EMULATOR {
emu.gba.frame();
let our_buffer =
std::mem::transmute::<&[u32], &[i32]>(&emu.hwif.borrow().frame_buffer as &[u32]);
env.set_int_array_region(frame_buffer, 0, our_buffer)
.expect("failed to copy frame buffer to java");
return 0;
}
error!("emulator is not initalized");
return -1;
}
}

View file

@ -58,7 +58,8 @@ pub trait InputInterface {
pub mod prelude { pub mod prelude {
pub use super::core::arm7tdmi; pub use super::core::arm7tdmi;
pub use super::core::cartridge::GamepakBuilder; pub use super::core::cartridge::{Cartridge, GamepakBuilder};
pub use super::core::gpu::{DISPLAY_HEIGHT, DISPLAY_WIDTH};
pub use super::core::Bus; pub use super::core::Bus;
pub use super::core::{GBAError, GBAResult, GameBoyAdvance}; pub use super::core::{GBAError, GBAResult, GameBoyAdvance};
#[cfg(feature = "debugger")] #[cfg(feature = "debugger")]