First messy io_uring impl

Reviewed-on: rhetenor/fluter#1

Cargo.toml

@@ -7,4 +7,6 @@ edition = "2021"
 address = "0.11.0"
 clap = { version = "4.5.23", features = ["derive"] }
 image = "0.25.5"
+io-uring = "0.7.3"
+libc = "0.2.169"
 tokio = "1.42.0"

src/flutr.rs

@@ -0,0 +1,67 @@
+use crate::pixelmsgs::PixelStringMsgs;
+use address::Host;
+use io_uring::{opcode, types, IoUring, Submitter};
+use libc::c_void;
+use libc::iovec;
+use std::{io::Write, net::TcpStream, os::fd::AsRawFd};
+
+pub struct FlutR {
+    stream: TcpStream,
+    stream_fd: i32,
+    msgs: PixelStringMsgs,
+}
+
+impl FlutR {
+    pub fn new(host: Host, port: u16, msgs: PixelStringMsgs) -> Result<Self, std::io::Error> {
+        let stream = TcpStream::connect(format!("{host}:{port}"))?;
+        let stream_fd = stream.as_raw_fd();
+        Ok(FlutR {
+            stream,
+            stream_fd,
+            msgs,
+        })
+    }
+
+    pub fn flut(&mut self) {
+        unsafe {
+            self.write_io_uring();
+            //self.write_sequential();
+        }
+    }
+
+    fn write_sequential(&mut self) {
+        loop {
+            for msg in self.msgs.clone() {
+                let _ = self.stream.write(&msg);
+            }
+            let _ = self.stream.flush();
+        }
+    }
+
+    unsafe fn write_io_uring(&mut self) {
+        let mut ring = IoUring::new(8).unwrap();
+
+        let buffer_len: usize = self.msgs.len() * 11;
+        let buffer: iovec = iovec {
+            iov_base: self.msgs.as_mut_ptr() as *mut c_void,
+            iov_len: buffer_len,
+        };
+        ring.submitter().register_buffers(&[buffer]);
+
+        let write_op = opcode::WriteFixed::new(
+            io_uring::types::Fd(self.stream_fd),
+            buffer.iov_base as *const u8,
+            buffer_len as u32,
+            0,
+        )
+        .build();
+
+        loop {
+            while ring.submission().is_full() {
+                ring.submission().sync();
+            }
+            ring.submission().push(&write_op).unwrap();
+            ring.submit().unwrap();
+        }
+    }
+}

src/main.rs

@@ -1,26 +1,38 @@
 use address::Host;
 use std::path::PathBuf;
 
-use image::{ImageReader, Rgb};
+use image::ImageReader;
 
 use clap::Parser;
 
-type Pixel<'a> = (u32, u32, &'a Rgb<u8>);
+mod flutr;
+mod pixelmsgs;
+
+use flutr::FlutR;
+use pixelmsgs::Add;
+use pixelmsgs::PixelStringMsgs;
 
 #[derive(Parser, Debug)]
 #[command(version, about, long_about = None)]
 struct Args {
     image_path: PathBuf,
-    addr: Host,
+    host: Host,
 
-    #[arg(short, long, default_value_t = 1234)]
+    #[arg(default_value_t = 1234)]
     port: u16,
 }
 
 fn main() {
     let args = Args::parse();
 
-    let image_result = parse_image(&args.image_path);
+    let pixel_msgs = parse_image_to_msgs(&args.image_path);
+
+    let mut flutr = FlutR::new(args.host, args.port, pixel_msgs).unwrap();
+    flutr.flut();
+}
+
+fn parse_image_to_msgs(path: &PathBuf) -> PixelStringMsgs {
+    let image_result = parse_image(path);
 
     let image = match image_result {
         Ok(img) => img,
@@ -28,13 +40,13 @@ fn main() {
     };
 
     let rgb_image = image.into_rgb8();
+    let mut result = PixelStringMsgs::with_capacity(rgb_image.len());
     for pixel in rgb_image.enumerate_pixels() {
-        write_pixel(pixel);
-    }
-    //println!("{:?}", &image);
+        result.add(pixel);
     }
 
-fn write_pixel(pixel: Pixel) {}
+    result
+}
 
 fn parse_image(path: &PathBuf) -> Result<image::DynamicImage, image::error::ImageError> {
     ImageReader::open(path)?.with_guessed_format()?.decode()

src/pixelmsgs.rs

@@ -0,0 +1,40 @@
+use image::Rgb;
+
+pub type PixelBinaryMsg = [u8; 11];
+pub type PixelBinaryMsgs = Vec<PixelBinaryMsg>;
+pub type PixelStringMsg = Box<[u8]>;
+pub type PixelStringMsgs = Vec<PixelStringMsg>;
+
+pub trait Add {
+    fn add(&mut self, item: (u32, u32, &Rgb<u8>));
+}
+
+impl Add for PixelBinaryMsgs {
+    fn add(&mut self, item: (u32, u32, &Rgb<u8>)) {
+        let pb: &[u8] = &[80, 66];
+        let x = (item.0 as u16).to_le_bytes();
+        let y = (item.1 as u16).to_le_bytes();
+
+        let color: &Rgb<u8> = item.2;
+        let r = color.0[0].to_le_bytes();
+        let g = color.0[1].to_le_bytes();
+        let b = color.0[2].to_le_bytes();
+
+        let msg = [pb, &x, &y, &r, &g, &b, &[0]].concat();
+        self.push(msg.try_into().unwrap());
+    }
+}
+
+impl Add for PixelStringMsgs {
+    fn add(&mut self, item: (u32, u32, &Rgb<u8>)) {
+        let color: &Rgb<u8> = item.2;
+        let r = color.0[0];
+        let g = color.0[1];
+        let b = color.0[2];
+        let msg = format!("PX {} {} {r:02x}{g:02x}{b:02x}\n", item.0, item.1)
+            .as_bytes()
+            .to_vec()
+            .into_boxed_slice();
+        self.push(msg);
+    }
+}