commit 032bcffe68e2a29e70267a9f1da28461ab98422c
Author: Avii <git@avii.nl>
Date:   Thu Aug 6 09:15:53 2026 +0200

    basic i/o

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..ea8c4bf
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diff --git a/Cargo.lock b/Cargo.lock
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diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..a291041
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,11 @@
+[package]
+name = "dashboard"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+embedded-graphics = "0.8.2"
+embedded-graphics-core = "0.4.1"
+evdev = "0.13.2"
+framebuffer = "0.3.1"
+linfb = "0.2.1"
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..154e822
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,78 @@
+mod rgba;
+mod screen;
+
+use embedded_graphics::{prelude::*, primitives::{PrimitiveStyle, Rectangle}};
+use evdev::{AbsoluteAxisCode, Device, EventSummary, KeyCode};
+use screen::Screen;
+use rgba::Rgba;
+
+
+fn main() {
+    let mut screen = Screen::new();
+
+    let red = (255, 0, 0, 255);
+    let green = (0, 255, 0, 255);
+    let blue = (0, 0, 255, 255);
+
+    // /dev/input/event4:	silead_ts
+
+
+    Rectangle::new(Point::new(0, 0), Size::new(screen.width(), 1))
+        .into_styled(PrimitiveStyle::with_fill(Rgba::from(red)))
+        .draw(&mut screen)
+        .ok();
+
+    Rectangle::new(Point::new(0, 1), Size::new(screen.width(), 1))
+        .into_styled(PrimitiveStyle::with_fill(Rgba::from(green)))
+        .draw(&mut screen)
+        .ok();
+
+    Rectangle::new(Point::new(0, 2), Size::new(screen.width(), 1))
+        .into_styled(PrimitiveStyle::with_fill(Rgba::from(blue)))
+        .draw(&mut screen)
+        .ok();
+
+    let Ok(mut device) = Device::open("/dev/input/event4") else {
+        panic!("No TS");
+    };
+
+    // device.set_nonblocking(true).unwrap();
+
+    let mut x = -1;
+    let mut y = -1;
+
+    loop {
+
+
+
+        // println!("dont block");
+        let Ok(events) = device.fetch_events() else {
+            continue;
+        };
+
+        for event in events {
+            match event.destructure(){
+                EventSummary::AbsoluteAxis(_, AbsoluteAxisCode::ABS_X, value) => {
+                    x = (((value - 13) as f32 / 882.) * (screen.width() as f32)) as i32;
+                },
+                EventSummary::AbsoluteAxis(_, AbsoluteAxisCode::ABS_Y, value) => {
+                    y = (((value - 13) as f32 / 624.) * (screen.height() as f32)) as i32;
+                },
+                EventSummary::Key(_, KeyCode::BTN_TOUCH, value) => {
+                    // if value is 1, touch is started
+                    // if value is 0, touch ended
+                    println!("touch: {}", value)
+                },
+                _ => {}
+            }
+        }
+
+        println!("{}x{}", x, y);
+
+        screen.clear(Rgba::from((0,0,0,255))).ok();
+        Rectangle::new(Point::new(x - 50, y - 50), Size::new(100, 100))
+            .into_styled(PrimitiveStyle::with_fill(Rgba::from(blue)))
+            .draw(&mut screen)
+            .ok();
+    }
+}
diff --git a/src/rgba.rs b/src/rgba.rs
new file mode 100644
index 0000000..b55d5db
--- /dev/null
+++ b/src/rgba.rs
@@ -0,0 +1,107 @@
+use embedded_graphics_core::pixelcolor::*;
+use linfb::shape::Color;
+
+/// Simple RGBA color wrapper.
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+pub struct Rgba<C: RgbColor>(C, u8);
+
+#[allow(unused)]
+#[inline(always)]
+fn mul_blend_u8(delta: u32, a: u32) -> u32 {
+    // Exact (delta * a) / 255 using the div255 trick (no slow integer division).
+    // Valid for 0..=65535 inputs; see Hacker's Delight 10-16.
+    let t = delta * a + 128;
+    (t + (t >> 8)) >> 8
+}
+
+#[allow(unused)]
+impl<C: RgbColor> Rgba<C> {
+    /// Create a new RGBA color.
+    pub const fn new(color: C, alpha: u8) -> Self {
+        Self(color, alpha)
+    }
+
+    /// Get the color component.
+    pub const fn rgb(&self) -> C {
+        self.0
+    }
+
+    pub fn r(&self) -> u8 {
+        self.0.r()
+    }
+
+    pub fn g(&self) -> u8 {
+        self.0.g()
+    }
+
+    pub fn b(&self) -> u8 {
+        self.0.b()
+    }
+
+    /// Get the alpha component (0..=255).
+    pub const fn a(&self) -> u8 {
+        self.1
+    }
+}
+
+impl<C: RgbColor> PixelColor for Rgba<C> {
+    type Raw = C::Raw;
+}
+
+#[allow(unused)]
+pub trait Blend<T> {
+    fn blend(&self, bg: T) -> T;
+}
+
+impl Blend<Rgb888> for Rgba<Rgb888> {
+    #[inline(always)]
+    fn blend(&self, bg: Rgb888) -> Rgb888 {
+        let a = self.a() as u32;
+        if a == 0 {
+            return bg;
+        }
+        if a == 255 {
+            return self.rgb();
+        }
+
+        let fr = self.rgb().r() as u32;
+        let fg = self.rgb().g() as u32;
+        let fb = self.rgb().b() as u32;
+
+        let br = bg.r() as u32;
+        let bgc = bg.g() as u32;
+        let bb = bg.b() as u32;
+
+        let r = (br + mul_blend_u8(fr.wrapping_sub(br), a)) as u8;
+        let g = (bgc + mul_blend_u8(fg.wrapping_sub(bgc), a)) as u8;
+        let b = (bb + mul_blend_u8(fb.wrapping_sub(bb), a)) as u8;
+
+        Rgb888::new(r, g, b)
+    }
+}
+
+impl From<(u8,u8,u8,u8)> for Rgba<Rgb888> {
+    fn from(value: (u8,u8,u8,u8)) -> Self {
+        Self(
+            Rgb888::new(
+                value.0,
+                value.1,
+                value.2,
+            ),
+            value.3,
+        )
+    }
+}
+
+impl From<Color> for Rgba<Rgb888> {
+    fn from(value: Color) -> Self {
+        Self(
+            Rgb888::new(
+                value.red,
+                value.green,
+                value.blue,
+            ),
+            value.alpha,
+        )
+    }
+}
diff --git a/src/screen.rs b/src/screen.rs
new file mode 100644
index 0000000..63eeca7
--- /dev/null
+++ b/src/screen.rs
@@ -0,0 +1,78 @@
+use embedded_graphics::{pixelcolor::Rgb888, prelude::*, primitives::Rectangle};
+use linfb::{Framebuffer, shape::Color};
+
+use crate::rgba::Rgba;
+
+
+pub struct Screen {
+    framebuffer: Framebuffer,
+    width: u32,
+    height: u32,
+}
+
+impl Screen {
+    pub fn new() -> Self {
+        let framebuffer = Framebuffer::open()
+            .expect("Failed to open framebuffer");
+
+        let width = framebuffer.screen_info.xres;
+        let height = framebuffer.screen_info.yres;
+
+        Self {
+            framebuffer,
+            width,
+            height
+        }
+    }
+
+    pub fn width(&self) -> u32 {
+        self.width
+    }
+
+    pub fn height(&self) -> u32 {
+        self.height
+    }
+}
+
+impl Dimensions for Screen {
+    fn bounding_box(&self) -> Rectangle {
+        Rectangle::new(
+            Point::new(0, 0),
+            Size::new(self.width, self.height),
+        )
+    }
+}
+
+impl DrawTarget for Screen {
+    type Color = Rgba<Rgb888>;
+    type Error = Box<dyn std::error::Error>;
+
+    fn draw_iter<I>(&mut self, pixels: I) -> Result<(), Self::Error>
+    where
+        I: IntoIterator<Item = embedded_graphics::Pixel<Self::Color>>,
+    {
+        let width = self.bounding_box().size.width;
+        let height = self.bounding_box().size.height;
+
+        for p in pixels {
+            let x = p.0.x as u32;
+            let y = p.0.y as u32;
+
+            let color = Color {
+                red: p.1.r(),
+                green: p.1.g(),
+                blue: p.1.b(),
+                alpha: p.1.a(),
+            };
+
+            if !(0..width).contains(&x) || !(0..height).contains(&y) {
+                continue;
+            }
+
+            self.framebuffer.set_pixel(x, y, color);
+        }
+        self.framebuffer.flush();
+
+        Ok(())
+    }
+}