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use crate::prelude::*;
use rand::prelude::*;
use std::path::PathBuf;
use std::sync::{Arc, Mutex};
use std::thread;
use wasmer::{imports, Function, Instance, Module, Store, Value};
#[derive(Debug, Clone, Copy)]
struct Tile {
x: usize,
y: usize,
width: usize,
height: usize,
}
pub struct RPU {}
impl Default for RPU {
fn default() -> Self {
Self::new()
}
}
impl RPU {
pub fn new() -> Self {
Self {}
}
/// Compile the RPU source code (given by its path) to WAT source code.
pub fn compile_to_wat_from_path(
&self,
path: PathBuf,
high_precision: bool,
) -> Result<String, String> {
if let Ok(main) = std::fs::read_to_string(path.clone()) {
let mut pre = Preprocessor::default();
let main = pre.process_module(&main);
let scanner = Scanner::new(main);
let mut parser = Parser::new();
parser.set_high_precision(high_precision);
parser.parse(scanner)
} else {
Err("Could not read file.".to_string())
}
}
/// Compile the RPU source code to WAT source code.
pub fn compile_to_wat(&self, rpu_source: String) -> Result<String, String> {
let mut pre = Preprocessor::default();
let rpu_source = pre.process_module(&rpu_source);
let scanner = Scanner::new(rpu_source);
let mut parser = Parser::new();
parser.parse(scanner)
}
/// Compile the RPU source code and run the function with the given arguments.
pub fn compile_and_run(
&self,
source: &str,
func_name: &str,
args: Vec<Value>,
high_precision: bool,
) -> Result<Vec<Value>, String> {
let rc = self.compile_to_wat(source.to_string());
match rc {
Ok(wat) => self.compile_wat_and_run(&wat, func_name, args, high_precision),
Err(err) => Err(err.to_string()),
}
}
/// Compile the WAT source code and run the function with the given arguments.
pub fn compile_wat_and_run(
&self,
wat: &str,
func_name: &str,
args: Vec<Value>,
high_precision: bool,
) -> Result<Vec<Value>, String> {
let mut store = Store::default();
let module_rc = Module::new(&store, wat);
match module_rc {
Ok(module) => {
let import_object = RPU::create_imports(&mut store, high_precision);
if let Ok(instance) = Instance::new(&mut store, &module, &import_object) {
if let Ok(func) = instance.exports.get_function(func_name) {
let _start = self.get_time();
match func.call(&mut store, &args) {
Ok(values) => {
let _stop = self.get_time();
println!("Execution time: {:?} ms.", _stop - _start);
return Ok(values.to_vec());
}
Err(err) => return Err(err.to_string()),
}
}
}
}
Err(err) => return Err(err.to_string()),
}
Err("Unknown error".to_string())
}
/// Compile the WAT source code and run the shader with the given arguments. The shader will be executed on the given buffer.
pub fn compile_wat_and_run_as_shader(
&self,
wat: &str,
func_name: &str,
buffer: &mut ColorBuffer,
high_precision: bool,
) -> Result<Vec<Value>, String> {
let mut store = Store::default();
let module_rc = Module::new(&store, wat);
match module_rc {
Ok(module) => {
let import_object = RPU::create_imports(&mut store, high_precision);
if let Ok(instance) = Instance::new(&mut store, &module, &import_object) {
if let Ok(func) = instance.exports.get_function(func_name) {
let _start = self.get_time();
for y in 0..buffer.height {
for x in 0..buffer.width {
let args = if high_precision {
vec![
Value::F64(x as f64),
Value::F64(buffer.height as f64 - y as f64),
Value::F64(buffer.width as f64),
Value::F64(buffer.height as f64),
]
} else {
vec![
Value::F32(x as f32),
Value::F32(buffer.height as f32 - y as f32),
Value::F32(buffer.width as f32),
Value::F32(buffer.height as f32),
]
};
match func.call(&mut store, &args) {
Ok(values) => {
if high_precision {
let r = values[0].f64().unwrap();
let g = values[1].f64().unwrap();
let b = values[2].f64().unwrap();
let a = values[3].f64().unwrap();
buffer.set(x, y, [r, g, b, a]);
} else {
let r = values[0].f32().unwrap();
let g = values[1].f32().unwrap();
let b = values[2].f32().unwrap();
let a = values[3].f32().unwrap();
buffer.set(
x,
y,
[r as f64, g as f64, b as f64, a as f64],
);
}
}
Err(err) => return Err(err.to_string()),
}
}
}
let _stop = self.get_time();
println!("Shader execution time: {:?} ms.", _stop - _start);
}
}
}
Err(err) => return Err(err.to_string()),
}
Ok(vec![])
}
/// Compile the WAT source code and run the shader with the given arguments. The shader will be executed on the given buffer.
pub fn compile_wat_and_run_as_tiled_shader(
&self,
wat: &str,
func_name: &str,
buffer: &mut Arc<Mutex<ColorBuffer>>,
tile_size: (usize, usize),
iterations: usize,
high_precision: bool,
) -> Result<Vec<Value>, String> {
let width = buffer.lock().unwrap().width;
let height = buffer.lock().unwrap().height;
let tiles = self.create_tiles(width, height, tile_size.0, tile_size.1);
let tiles_mutex = Arc::new(Mutex::new(tiles));
let num_cpus = num_cpus::get();
let _start = self.get_time();
// Create threads
let mut handles = vec![];
for _ in 0..num_cpus {
let tiles_mutex = Arc::clone(&tiles_mutex);
let buffer_mutex = Arc::clone(buffer);
let fname = func_name.to_string().clone();
let wat = wat.to_string().clone();
let handle = thread::spawn(move || {
let mut store = Store::default();
let module_rc = Module::new(&store, wat);
match module_rc {
Ok(module) => {
let import_object = RPU::create_imports(&mut store, high_precision);
if let Ok(instance) = Instance::new(&mut store, &module, &import_object) {
if let Ok(func) = instance.exports.get_function(&fname) {
let mut tile_buffer = ColorBuffer::new(tile_size.0, tile_size.1);
loop {
// Lock mutex to access tiles
let mut tiles = tiles_mutex.lock().unwrap();
// Check if there are remaining tiles
if let Some(tile) = tiles.pop() {
// Release mutex before processing tile
drop(tiles);
// Process tile
for h in 0..tile.height {
for w in 0..tile.width {
let x = tile.x + w;
let y = tile.y + h;
if x >= width || y >= height {
continue;
}
let args = if high_precision {
vec![
Value::F64(x as f64),
Value::F64(height as f64 - y as f64),
Value::F64(width as f64),
Value::F64(height as f64),
]
} else {
vec![
Value::F32(x as f32),
Value::F32(height as f32 - y as f32),
Value::F32(width as f32),
Value::F32(height as f32),
]
};
let mut fc = [0.0, 0.0, 0.0, 0.0];
for i in 0..iterations {
if let Ok(gl) =
instance.exports.get_global("mem_ptr")
{
_ = gl.set(&mut store, Value::I32(32));
}
match func.call(&mut store, &args) {
Ok(values) => {
let rgba = if high_precision {
[
values[0].f64().unwrap(),
values[1].f64().unwrap(),
values[2].f64().unwrap(),
values[3].f64().unwrap(),
]
} else {
[
values[0].f32().unwrap() as f64,
values[1].f32().unwrap() as f64,
values[2].f32().unwrap() as f64,
values[3].f32().unwrap() as f64,
]
};
let f = 1.0 / (i as f64 + 1.0);
fc[0] = fc[0] * (1.0 - f) + rgba[0] * f;
fc[1] = fc[1] * (1.0 - f) + rgba[1] * f;
fc[2] = fc[2] * (1.0 - f) + rgba[2] * f;
fc[3] = fc[3] * (1.0 - f) + rgba[3] * f;
}
Err(err) => println!("{}", err),
}
// Set the final color into the local buffer
tile_buffer.set(w, h, fc);
}
}
}
// Save the tile buffer to the main buffer
buffer_mutex.lock().unwrap().copy_from(
tile.x,
tile.y,
&tile_buffer,
);
// Save thebuffer optionally to disk after each completed block.
if let Ok(buffer) = buffer_mutex.lock() {
if let Some(path) = &buffer.file_path {
buffer.save(path.clone());
}
}
} else {
// No remaining tiles, exit loop
break;
}
}
}
}
}
Err(err) => println!("{}", err),
}
});
handles.push(handle);
}
// Wait for all threads to finish
for handle in handles {
handle.join().unwrap();
}
let _stop = self.get_time();
println!("Shader execution time: {:?} ms.", _stop - _start);
Ok(vec![])
}
/// Create the tiles as a spiral pattern starting from the center.
fn create_tiles(
&self,
image_width: usize,
image_height: usize,
tile_width: usize,
tile_height: usize,
) -> Vec<Tile> {
// TODO: Generate the tiles in a nice spiral pattern
let mut tiles = Vec::new();
let mut x = 0;
let mut y = 0;
while x < image_width && y < image_height {
let tile = Tile {
x,
y,
width: tile_width,
height: tile_height,
};
tiles.push(tile);
x += tile_width;
if x >= image_width {
x = 0;
y += tile_height;
}
}
tiles
}
fn create_imports(store: &mut Store, high_precision: bool) -> wasmer::Imports {
if high_precision {
imports! {
"env" => {
"_rpu_sin" => Function::new_typed(store, |x: f64| -> f64 { x.sin() }),
"_rpu_cos" => Function::new_typed(store, |x: f64| -> f64 { x.cos() }),
"_rpu_tan" => Function::new_typed(store, |x: f64| -> f64 { x.tan() }),
"_rpu_atan" => Function::new_typed(store, |x: f64| -> f64 { x.atan() }),
"_rpu_exp" => Function::new_typed(store, |x: f64| -> f64 { x.exp() }),
"_rpu_degrees" => Function::new_typed(store, |x: f64| -> f64 { x.to_degrees() }),
"_rpu_radians" => Function::new_typed(store, |x: f64| -> f64 { x.to_radians() }),
"_rpu_min" => Function::new_typed(store, |x: f64, y: f64| -> f64 { x.min(y) }),
"_rpu_max" => Function::new_typed(store, |x: f64, y: f64| -> f64 { x.max(y) }),
"_rpu_pow" => Function::new_typed(store, |x: f64, y: f64| -> f64 { x.powf(y) }),
"_rpu_mod" => Function::new_typed(store, |x: f64, y: f64| -> f64 { x - y * (x / y).floor() }),
"_rpu_step" => Function::new_typed(store, |edge: f64, x: f64| -> f64 { if x < edge {
0.0
} else {
1.0
}}),
"_rpu_rand" => Function::new_typed(store, || -> f64 {
let mut rng = rand::thread_rng();
rng.gen()
}),
"_rpu_sign" => Function::new_typed(store, |x: f64| -> f64 { x.signum() }),
"_rpu_clamp" => Function::new_typed(store, |x: f64, y: f64, z: f64| -> f64 { x.clamp(y, z) }),
},
}
} else {
imports! {
"env" => {
"_rpu_sin" => Function::new_typed(store, |x: f32| -> f32 { x.sin() }),
"_rpu_cos" => Function::new_typed(store, |x: f32| -> f32 { x.cos() }),
"_rpu_tan" => Function::new_typed(store, |x: f32| -> f32 { x.tan() }),
"_rpu_atan" => Function::new_typed(store, |x: f32| -> f32 { x.atan() }),
"_rpu_exp" => Function::new_typed(store, |x: f32| -> f32 { x.exp() }),
"_rpu_degrees" => Function::new_typed(store, |x: f32| -> f32 { x.to_degrees() }),
"_rpu_radians" => Function::new_typed(store, |x: f32| -> f32 { x.to_radians() }),
"_rpu_min" => Function::new_typed(store, |x: f32, y: f32| -> f32 { x.min(y) }),
"_rpu_max" => Function::new_typed(store, |x: f32, y: f32| -> f32 { x.max(y) }),
"_rpu_pow" => Function::new_typed(store, |x: f32, y: f32| -> f32 { x.powf(y) }),
"_rpu_mod" => Function::new_typed(store, |x: f32, y: f32| -> f32 { x - y * (x / y).floor() }),
"_rpu_step" => Function::new_typed(store, |edge: f32, x: f32| -> f32 { if x < edge {
0.0
} else {
1.0
}}),
"_rpu_rand" => Function::new_typed(store, || -> f32 {
let mut rng = rand::thread_rng();
rng.gen()
}),
"_rpu_sign" => Function::new_typed(store, |x: f32| -> f32 { x.signum() }),
"_rpu_clamp" => Function::new_typed(store, |x: f32, y: f32, z: f32| -> f32 { x.clamp(y, z) }),
},
}
}
}
/// Get the current time
pub fn get_time(&self) -> u128 {
#[cfg(target_arch = "wasm32")]
{
web_sys::window().unwrap().performance().unwrap().now() as u128
}
#[cfg(not(target_arch = "wasm32"))]
{
let stop = std::time::SystemTime::now()
.duration_since(std::time::UNIX_EPOCH)
.expect("Time went backwards");
stop.as_millis()
}
}
}