make framebuffer crate and call it

bin/src/framebuffer.rs

@@ -0,0 +1,71 @@
+use image::{io::Reader as ImageReader, AnimationDecoder, imageops::FilterType, codecs::gif::GifDecoder, DynamicImage};
+use std::{io::BufReader, fs::File, time::Duration};
+use include_dir::{include_dir, Dir};
+
+const FB_PATH:&str = "/dev/fb0";
+static IMAGE_DIR: Dir<'_> = include_dir!("$CARGO_MANIFEST_DIR/static/images/");
+
+
+#[derive(Copy, Clone)]
+// TODO actually poll for this, maybe w/ fbset?
+struct Dimensions {
+    height: u32,
+    width: u32,
+}
+
+#[derive(Copy, Clone)]
+pub struct Framebuffer<'a> {
+    dimensions: Dimensions,
+    path: &'a str,
+}
+
+impl Framebuffer<'_>{
+    pub const fn new() -> Self {
+        Framebuffer{
+            dimensions: Dimensions{height: 128, width: 128},
+            path: FB_PATH,
+        }
+    }
+
+
+    fn write(&mut self, img: DynamicImage) {
+        let resized_img = img.resize( self.dimensions.width, self.dimensions.height, FilterType::CatmullRom);
+        let width = self.dimensions.width.min(resized_img.width());
+        let height = self.dimensions.height.min(resized_img.height());
+        let img_rgba8 = resized_img.as_rgba8().unwrap();
+        let mut buf = Vec::new();
+        for y in 0..height {
+            for x in 0..width {
+                let px = img_rgba8.get_pixel(x, y);
+                let mut rgb565: u16 = (px[0] as u16 & 0b11111000) << 8;
+                rgb565 |= (px[1] as u16 & 0b11111100) << 3;
+                rgb565 |= (px[2] as u16) >> 3;
+                buf.extend(rgb565.to_le_bytes());
+            }
+        }
+        std::fs::write(self.path, &buf).unwrap();
+    }
+
+
+    pub fn draw_img(&mut self, img_name: &str) {
+        let img_path = IMAGE_DIR.get_file(img_name).unwrap().path();
+        if img_path.ends_with(".gif") {
+            loop {
+                // this is dumb and i'm sure there's a better way to loop this
+                let stream = BufReader::new(File::open(&img_path).unwrap());
+                let decoder = GifDecoder::new(stream).unwrap();
+                for maybe_frame in decoder.into_frames() {
+                    let frame = maybe_frame.unwrap();
+                    let (numerator, _) = frame.delay().numer_denom_ms();
+                    let img = DynamicImage::from(frame.into_buffer());
+                    self.write(img);
+                    std::thread::sleep(Duration::from_millis(numerator as u64));
+                }
+            }
+        } else {
+            let img_reader = ImageReader::open(img_path).unwrap();
+            let img = img_reader.decode().unwrap();
+            self.write(img);
+        }
+    }
+}