diff --git a/.gitignore b/.gitignore
index aceeab82..65ec0fb5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -13,3 +13,5 @@ fw_payload.*
 *.bin
 *.elf
 *.img
+toimg/target
+toimg/Cargo.lock
diff --git a/toimg/Cargo.toml b/toimg/Cargo.toml
new file mode 100644
index 00000000..ce7a8c9b
--- /dev/null
+++ b/toimg/Cargo.toml
@@ -0,0 +1,7 @@
+[package]
+name = "toimg"
+version = "0.1.0"
+edition = "2018"
+
+[dependencies]
+image = "*"
diff --git a/toimg/src/main.rs b/toimg/src/main.rs
new file mode 100644
index 00000000..f62fde11
--- /dev/null
+++ b/toimg/src/main.rs
@@ -0,0 +1,120 @@
+use std::env;
+use std::path::PathBuf;
+use std::io::prelude::*;
+use std::fs::File;
+
+use image::io::Reader as ImageReader;
+
+fn main2() {
+    let args: Vec<String> = env::args().collect();
+    let input = &args[1];
+    let addr = &args[2].parse::<u32>().unwrap();
+
+    let fr = ImageReader::open(format!("{}.r.bmp", input)).unwrap().decode().unwrap();
+    let fr = fr.into_rgba8();
+    let fg = ImageReader::open(format!("{}.g.bmp", input)).unwrap().decode().unwrap();
+    let fg = fg.into_rgba8();
+    let fb = ImageReader::open(format!("{}.b.bmp", input)).unwrap().decode().unwrap();
+    let fb = fb.into_rgba8();
+    let fa = ImageReader::open(format!("{}.a.bmp", input)).unwrap().decode().unwrap();
+    let fa = fa.into_rgba8();
+
+    let addr = addr & !(0x3);
+    let idx = (addr >> 2) & 0x3;
+    let addr = addr >> 4;
+    let (x, y) = (addr & fr.width(), addr / fr.width());
+    let px = match idx {
+        0 => fr.get_pixel(x, y),
+        1 => fg.get_pixel(x, y),
+        2 => fb.get_pixel(x, y),
+        3 => fa.get_pixel(x, y),
+        _ => unimplemented!(),
+    };
+
+    let res = ((px.0[0] as u32) << 0) |
+              ((px.0[1] as u32) << 8) |
+              ((px.0[2] as u32) << 16) |
+              ((px.0[3] as u32) << 24);
+
+    println!("r={} g={} b={} a={}", px.0[0] as u32, px.0[1] as u32, px.0[2] as u32, px.0[3] as u32);
+
+    println!("x{} y{} i{} => {:#x}", x, y, idx, res);
+}
+
+fn main() {
+    let args: Vec<String> = env::args().collect();
+    let input = PathBuf::from(&args[1]);
+    let width = args[2].parse::<u32>().unwrap();
+    let height = args[3].parse::<u32>().unwrap();
+
+    let file = File::open(&input).unwrap().bytes();
+
+    let mut fr = image::ImageBuffer::new(width, height);
+    let mut fg = image::ImageBuffer::new(width, height);
+    let mut fb = image::ImageBuffer::new(width, height);
+    let mut fa = image::ImageBuffer::new(width, height);
+
+    let mut idx_a = 0;
+    let mut idx_b = 0;
+    let mut idx = 0;
+
+    // for x in 0..width {
+    //     for y in 0..height {
+    //         for i in 0..4 {
+    //             let f = match i {
+    //                 0 => &mut fr,
+    //                 1 => &mut fg,
+    //                 2 => &mut fb,
+    //                 3 => &mut fa,
+    //                 _ => unreachable!(),
+    //             };
+    //             let mut cur: &mut image::Rgba<u8> = f.get_pixel_mut(x, y);
+    //             cur.0 = [0, 0, 0, 0];
+    //         }
+    //     }
+    // }
+
+    println!("Converting...");
+    for b in file {
+        if let Ok(b) = b {
+            let f = match idx_b {
+                0 => &mut fr,
+                1 => &mut fg,
+                2 => &mut fb,
+                3 => &mut fa,
+                _ => unreachable!(),
+            };
+
+            let x = idx % width;
+            let y = idx / width;
+            let mut cur: &mut image::Rgba<u8> = f.get_pixel_mut(x, y);
+
+            match idx_a {
+                0 => cur.0[0] = b,
+                1 => cur.0[1] = b,
+                2 => cur.0[2] = b,
+                3 => cur.0[3] = b,
+                _ => unreachable!(),
+            }
+
+            // f.set_pixel(x, y, cur);
+
+            idx_a += 1;
+            if idx_a == 4 {
+                idx_a = 0;
+                idx_b += 1;
+                if idx_b == 4 {
+                    idx_b = 0;
+                    idx += 1;
+                }
+            }
+        }
+    }
+
+    let y = idx / width;
+    println!("Saving result... (required size: x={} y={})", width, y + 1);
+    fr.save(input.clone().with_extension("r.bmp")).unwrap();
+    fg.save(input.clone().with_extension("g.bmp")).unwrap();
+    fb.save(input.clone().with_extension("b.bmp")).unwrap();
+    fa.save(input.clone().with_extension("a.bmp")).unwrap();
+}