no-std

Cargo.toml

@@ -14,8 +14,7 @@ crate-type = ["cdylib", "rlib", "staticlib"]
 
 [features]
 default = ["libc", "glutin", "gl" ,"ratatui" ,"icy_sixel", "image", "ratatui-image"]
-ffi = []
-ffi-base64 = ["image", "base64"]
+ffi = ["linked_list_allocator"]
 
 [profile.release]
 opt-level = "s"
@@ -31,6 +30,10 @@ split-debuginfo = "unpacked"
 lto = false
 incremental = true
 opt-level = 0
+panic = 'abort'
+
+[dependencies]
+linked_list_allocator = { version = "0.10", optional = true }
 
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies]
 libc = { version = "0.2.126", optional = true }
@@ -40,7 +43,7 @@ ratatui = { version = "^0.29.0", features = ["crossterm"], optional = true }
 icy_sixel = { version = "^0.1.1", optional = true }
 image = { version = "^0.25.1", default-features = false, features = ["jpeg", "png"], optional = true }
 ratatui-image = { version = "4.2.0", optional = true }
-base64 = { version = "0.21.7", optional = true }
+
 
 [target.'cfg(target_arch = "wasm32")'.dependencies]
 js-sys = "0.3.59"

Makefile

@@ -44,7 +44,7 @@ web-build:
 
 ffi-build:
 # 	cargo install cbindgen
-	cargo build --release --no-default-features --features ffi
+	cargo rustc --release --no-default-features --features ffi --crate-type staticlib
 	cbindgen . -o gameboy.h --lang c
 
 ffi-size:

cbindgen.toml

@@ -0,0 +1,7 @@
+# cbindgen.toml
+
+[export]
+exclude = ["memcpy", "memmove", "memset", "memcmp", "bzero"]
+
+[defines]
+"feature = ffi" = "FFI"

examples/desktop/bin.rs

@@ -6,7 +6,7 @@ fn main() {
     // TODO: Allow receive path by arguments
     // let gb = Gameboy::new("./../../tests/cpu_instrs/cpu_instrs.gb");
     // if let Ok((data, filepath)) = load_rom("./../the-machine.gb") {
-    if let Ok((data, filepath)) = load_rom("/Users/rapha/Documents/a/boyband/game/SuperWish/game.gb") {
+    if let Ok((data, filepath)) = load_rom("/Users/rapha/Downloads/dragon-ball.gbc") {
     // if let Ok((data, filepath)) = load_rom("./../bakery.gb") {
         let gb = Gameboy::new(data, Some(filepath));
         gb.render(Desktop);

gameboy.h

@@ -25,6 +25,10 @@ typedef struct ImageBuffer {
   const uint8_t *data;
 } ImageBuffer;
 
+#if defined(FFI)
+void init_allocator(uint8_t *heap_start, uintptr_t heap_size);
+#endif
+
 /**
  * # Safety
  *
@@ -39,5 +43,3 @@ void keydown(enum KeypadKey key);
 void keyup(enum KeypadKey key);
 
 struct ImageBuffer image(void);
-
-const char *image_base64(void);

src/cpu/core.rs

@@ -1,6 +1,8 @@
 use crate::cpu::registers::Registers;
 use crate::cpu::{data, ld, misc, stack};
 use crate::mmu::MemoryManagementUnit;
+#[cfg(feature = "ffi")]
+use alloc::vec::Vec;
 
 #[allow(dead_code)]
 pub enum Interrupt {
@@ -25,6 +27,7 @@ pub struct Cpu<'a> {
 }
 
 impl Cpu<'_> {
+    #[cfg(not(feature = "ffi"))]
     pub fn new(data: Vec<u8>, file: Option<std::path::PathBuf>) -> Self {
         let memory = MemoryManagementUnit::new_cgb(data, file).unwrap();
         let registers = Registers::new(memory.gbmode);
@@ -40,6 +43,23 @@ impl Cpu<'_> {
             _executed_operations: Vec::new(),
         }
     }
+
+    #[cfg(feature = "ffi")]
+    pub fn new(data: Vec<u8>, _file: Option<()>) -> Self {
+        let memory = MemoryManagementUnit::new_cgb(data, None).unwrap();
+        let registers = Registers::new(memory.gbmode);
+
+        Cpu {
+            registers,
+            memory,
+            ime: false,
+            setdi: 0,
+            setei: 0,
+            halt: 0,
+            stop: 0,
+            _executed_operations: Vec::new(),
+        }
+    }
     fn mut_find_or_insert<T: PartialEq>(vec: &mut Vec<T>, val: T) -> &mut T {
         if let Some(i) = vec.iter().position(|each| *each == val) {
             &mut vec[i]
@@ -1115,6 +1135,7 @@ impl Cpu<'_> {
                 4
             }
             _ => {
+                #[cfg(not(feature = "ffi"))]
                 println!(
                     "Instruction at {:#01x} | {:#06x} | {} not implemented, stopping.",
                     op, op, op

src/cpu/registers.rs

@@ -1,5 +1,8 @@
 use crate::mode::GbMode;
+#[cfg(not(feature = "ffi"))]
 use std::fmt;
+#[cfg(feature = "ffi")]
+use core::fmt;
 
 #[derive(Debug)]
 pub struct Registers {

src/gameboy.rs

@@ -1,5 +1,7 @@
 use crate::cpu::core::Cpu;
 use crate::input::KeypadKey;
+#[cfg(feature = "ffi")]
+use alloc::vec::Vec;
 
 pub struct Gameboy {
     cpu: Cpu<'static>,
@@ -51,6 +53,7 @@ pub fn load_rom(filepath: &str) -> Result<(Vec<u8>, std::path::PathBuf), String>
 pub const CYCLES: u32 = 70224;
 
 impl Gameboy {
+    #[cfg(not(feature = "ffi"))]
     pub fn new(data: Vec<u8>, filepath: Option<std::path::PathBuf>) -> Gameboy {
         // let rom = load_rom();
 
@@ -62,6 +65,17 @@ impl Gameboy {
 
         gb
     }
+
+    #[cfg(feature = "ffi")]
+    pub fn new(data: Vec<u8>, _filepath: Option<()>) -> Gameboy {
+        let gb = Gameboy {
+            cpu: Cpu::new(data, None),
+            width: 160,
+            height: 144,
+        };
+
+        gb
+    }
 
     pub fn render(self, render_mode: RenderMode) {
         match render_mode {

src/gpu/mod.rs

@@ -1,5 +1,10 @@
 use crate::mode::GbMode;
+#[cfg(not(feature = "ffi"))]
 use std::cmp::Ordering;
+#[cfg(feature = "ffi")]
+use core::cmp::Ordering;
+#[cfg(feature = "ffi")]
+use alloc::boxed::Box;
 
 const VRAM_SIZE: usize = 0x4000;
 const VOAM_SIZE: usize = 0xA0;