gallery works

user-apps/gallery/src/main.rs

@@ -1,5 +1,6 @@
 #![no_std]
 #![no_main]
+#![allow(static_mut_refs)]
 
 extern crate alloc;
 use abi::{
@@ -8,7 +9,7 @@ use abi::{
     file_len, get_key, list_dir, lock_display, print, read_file, sleep,
 };
 use alloc::{format, vec::Vec};
-use core::panic::PanicInfo;
+use core::{cell::RefCell, panic::PanicInfo};
 use embedded_graphics::{Drawable, image::Image, prelude::*};
 use tinybmp::Bmp;
 
@@ -29,20 +30,50 @@ pub extern "Rust" fn _start() {
 
 pub fn main() {
     print("Starting Gallery app");
+    static mut BMP_BUF: [u8; 100_000] = [0_u8; 100_000];
     let mut display = Display;
 
-    let file = "/images/ferriseyes_tiny.bmp";
+    // Grid parameters
+    let grid_cols = 3;
+    let grid_rows = 3;
+    let cell_width = 64;
+    let cell_height = 64;
 
-    let mut bmp_buf = [0_u8; 3_000];
-    let read = read_file(file, 0, &mut bmp_buf);
-    let bmp = Bmp::from_slice(&bmp_buf[..read]).unwrap();
+    let mut images_drawn = 0;
 
-    // ensure all draws show up at once
-    lock_display(true);
-    Image::new(&bmp, Point::new(10, 20))
-        .draw(&mut display)
-        .unwrap();
-    lock_display(false);
+    let mut files = [const { None }; 18];
+    let files_num = list_dir("/images", &mut files);
+
+    for file in &files[2..files_num] {
+        if images_drawn >= grid_cols * grid_rows {
+            break; // only draw 3x3
+        }
+
+        if let Some(f) = file {
+            print(&format!("file: {}", f.name));
+            if f.name.extension() == b"bmp" || f.name.extension() == b"BMP" {
+                let file = format!("/images/{}", f.name);
+
+                let read = read_file(&file, 0, &mut unsafe { &mut BMP_BUF[..] });
+                if read > 0 {
+                    let bmp = Bmp::from_slice(unsafe { &BMP_BUF }).expect("failed to parse bmp");
+
+                    let row = images_drawn / grid_cols;
+                    let col = images_drawn % grid_cols;
+                    let x = (col * cell_width) as i32 + 10; // 10px margin
+                    let y = (row * cell_height) as i32 + 10;
+
+                    lock_display(true);
+                    Image::new(&bmp, Point::new(x, y))
+                        .draw(&mut display)
+                        .unwrap();
+                    lock_display(false);
+
+                    images_drawn += 1;
+                }
+            }
+        }
+    }
 
     loop {
         let event = get_key();