diff --git a/Cargo.lock b/Cargo.lock
index c75e9ab..cfe5499 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -67,6 +67,12 @@ dependencies = [
  "windows-sys",
 ]
 
+[[package]]
+name = "autocfg"
+version = "1.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c08606f8c3cbf4ce6ec8e28fb0014a2c086708fe954eaa885384a6165172e7e8"
+
 [[package]]
 name = "backtrace"
 version = "0.3.75"
@@ -82,12 +88,30 @@ dependencies = [
  "windows-targets",
 ]
 
+[[package]]
+name = "bitflags"
+version = "1.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
+
 [[package]]
 name = "bitflags"
 version = "2.9.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1b8e56985ec62d17e9c1001dc89c88ecd7dc08e47eba5ec7c29c7b5eeecde967"
 
+[[package]]
+name = "bytemuck"
+version = "1.23.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5c76a5792e44e4abe34d3abf15636779261d45a7450612059293d1d2cfc63422"
+
+[[package]]
+name = "byteorder-lite"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8f1fe948ff07f4bd06c30984e69f5b4899c516a3ef74f34df92a2df2ab535495"
+
 [[package]]
 name = "cfg-if"
 version = "1.0.0"
@@ -173,6 +197,15 @@ version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b05b61dc5112cbb17e4b6cd61790d9845d13888356391624cbe7e41efeac1e75"
 
+[[package]]
+name = "crc32fast"
+version = "1.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9481c1c90cbf2ac953f07c8d4a58aa3945c425b7185c9154d67a65e4230da511"
+dependencies = [
+ "cfg-if",
+]
+
 [[package]]
 name = "eyre"
 version = "0.6.12"
@@ -183,6 +216,25 @@ dependencies = [
  "once_cell",
 ]
 
+[[package]]
+name = "fdeflate"
+version = "0.3.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1e6853b52649d4ac5c0bd02320cddc5ba956bdb407c4b75a2c6b75bf51500f8c"
+dependencies = [
+ "simd-adler32",
+]
+
+[[package]]
+name = "flate2"
+version = "1.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4a3d7db9596fecd151c5f638c0ee5d5bd487b6e0ea232e5dc96d5250f6f94b1d"
+dependencies = [
+ "crc32fast",
+ "miniz_oxide",
+]
+
 [[package]]
 name = "gimli"
 version = "0.31.1"
@@ -195,6 +247,31 @@ version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2304e00983f87ffb38b55b444b5e3b60a884b5d30c0fca7d82fe33449bbe55ea"
 
+[[package]]
+name = "image"
+version = "0.25.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "db35664ce6b9810857a38a906215e75a9c879f0696556a39f59c62829710251a"
+dependencies = [
+ "bytemuck",
+ "byteorder-lite",
+ "image-webp",
+ "num-traits",
+ "png",
+ "zune-core",
+ "zune-jpeg",
+]
+
+[[package]]
+name = "image-webp"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f6970fe7a5300b4b42e62c52efa0187540a5bef546c60edaf554ef595d2e6f0b"
+dependencies = [
+ "byteorder-lite",
+ "quick-error",
+]
+
 [[package]]
 name = "indenter"
 version = "0.3.3"
@@ -232,6 +309,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3be647b768db090acb35d5ec5db2b0e1f1de11133ca123b9eacf5137868f892a"
 dependencies = [
  "adler2",
+ "simd-adler32",
 ]
 
 [[package]]
@@ -240,12 +318,21 @@ version = "0.30.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "74523f3a35e05aba87a1d978330aef40f67b0304ac79c1c00b294c9830543db6"
 dependencies = [
- "bitflags",
+ "bitflags 2.9.1",
  "cfg-if",
  "cfg_aliases",
  "libc",
 ]
 
+[[package]]
+name = "num-traits"
+version = "0.2.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "071dfc062690e90b734c0b2273ce72ad0ffa95f0c74596bc250dcfd960262841"
+dependencies = [
+ "autocfg",
+]
+
 [[package]]
 name = "object"
 version = "0.36.7"
@@ -286,9 +373,23 @@ dependencies = [
  "clap",
  "color-eyre",
  "eyre",
+ "image",
  "nix",
 ]
 
+[[package]]
+name = "png"
+version = "0.17.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "82151a2fc869e011c153adc57cf2789ccb8d9906ce52c0b39a6b5697749d7526"
+dependencies = [
+ "bitflags 1.3.2",
+ "crc32fast",
+ "fdeflate",
+ "flate2",
+ "miniz_oxide",
+]
+
 [[package]]
 name = "proc-macro2"
 version = "1.0.95"
@@ -298,6 +399,12 @@ dependencies = [
  "unicode-ident",
 ]
 
+[[package]]
+name = "quick-error"
+version = "2.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a993555f31e5a609f617c12db6250dedcac1b0a85076912c436e6fc9b2c8e6a3"
+
 [[package]]
 name = "quote"
 version = "1.0.40"
@@ -322,6 +429,12 @@ dependencies = [
  "lazy_static",
 ]
 
+[[package]]
+name = "simd-adler32"
+version = "0.3.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d66dc143e6b11c1eddc06d5c423cfc97062865baf299914ab64caa38182078fe"
+
 [[package]]
 name = "strsim"
 version = "0.11.1"
@@ -480,3 +593,18 @@ name = "windows_x86_64_msvc"
 version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "589f6da84c646204747d1270a2a5661ea66ed1cced2631d546fdfb155959f9ec"
+
+[[package]]
+name = "zune-core"
+version = "0.4.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3f423a2c17029964870cfaabb1f13dfab7d092a62a29a89264f4d36990ca414a"
+
+[[package]]
+name = "zune-jpeg"
+version = "0.4.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2c9e525af0a6a658e031e95f14b7f889976b74a11ba0eca5a5fc9ac8a1c43a6a"
+dependencies = [
+ "zune-core",
+]
diff --git a/Cargo.toml b/Cargo.toml
index 0af2544..fa1341d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,4 +7,5 @@ edition = "2024"
 clap = { version = "4.5.39", features = ["derive"] }
 color-eyre = "0.6.5"
 eyre = "0.6.12"
+image = { version = "0.25.6", default-features = false, features = ["jpeg", "png", "webp"] }
 nix = { version = "0.30.1", features = ["ioctl"] }
diff --git a/src/main.rs b/src/main.rs
index 242c5b8..bd7bef5 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,12 +1,12 @@
+//! Image format is a buffer of `SCREEN_W * SCREEN_H + 1` bytes.
+//! The 4 least-significant bits of each byte is one pixel. The 4 most-significant bits are unused.
+//! Images are stored in landscape format, i.e. the first byte is the top-left pixel, and the
+//! second-to-last byte is the bottom-right pixel. The final byte is a null-terminator, and must be 0.
 use clap::Parser;
-use eyre::{Context, ensure, eyre};
+use eyre::{Context, bail, eyre};
+use image::ImageReader;
 use nix::ioctl_write_ptr;
-use std::{
-    fs::File,
-    io::Read,
-    os::fd::AsRawFd,
-    path::{Path, PathBuf},
-};
+use std::{fs::File, os::fd::AsRawFd, path::PathBuf};
 
 #[derive(Parser)]
 struct Opt {
@@ -14,11 +14,10 @@ struct Opt {
     pub path: PathBuf,
 }
 
-const SCREEN_W: usize = 1404;
-const SCREEN_H: usize = 1872;
+const SCREEN_W: usize = 1872;
+const SCREEN_H: usize = 1404;
 
-const BITS_PER_PIXEL: usize = 4;
-const FILE_SIZE: usize = SCREEN_W * SCREEN_H * BITS_PER_PIXEL / 8;
+const FILE_SIZE: usize = SCREEN_W * SCREEN_H + 1;
 
 // const SPI_IOC_MAGIC: u8 = b'k'; // Defined in linux/spi/spidev.h
 // const SPI_IOC_TYPE_MESSAGE: u8 = 0;
@@ -46,12 +45,29 @@ fn main() -> eyre::Result<()> {
     let opt = Opt::parse();
     color_eyre::install()?;
 
-    let image =
-        read_file(&opt.path).wrap_err_with(|| eyre!("Failed to read file at {:?}", opt.path))?;
+    let mut image = ImageReader::open(&opt.path)?.decode()?;
+
+    let image_dimensions = (image.width() as usize, image.height() as usize);
+
+    match image_dimensions {
+        (SCREEN_W, SCREEN_H) => {}
+        (SCREEN_H, SCREEN_W) => image = image.rotate270(),
+        _ => bail!("Image must be {SCREEN_W}x{SCREEN_H}"),
+    }
+
+    let image = image.to_luma8();
+    let mut pixels = image.into_vec();
+    for pixel in &mut pixels {
+        *pixel >>= 4; // convert 8-bit colorspace to 4-bits.
+    }
+    pixels.push(0u8); // add a null-terminator
+
+    // sanity check buffer length
+    assert!(pixels.len() == FILE_SIZE);
 
     let set_off_screen_data = DrmRockchipEbcOffScreen {
         info1: 0, // TODO: what is this?
-        ptr_screen_content: image.as_ptr(),
+        ptr_screen_content: pixels.as_ptr(),
     };
 
     let driver_file = File::options()
@@ -64,16 +80,3 @@ fn main() -> eyre::Result<()> {
 
     Ok(())
 }
-
-fn read_file(path: &Path) -> eyre::Result<Vec<u8>> {
-    let mut file = File::open(path)?;
-    let mut buf = vec![0u8; FILE_SIZE];
-    file.read_exact(&mut buf[..])
-        .wrap_err_with(|| eyre!("Expected a raw image file, of exactly {FILE_SIZE} bytes"))?;
-
-    // Try to read a single byte. If n != 0, it means the file was larger than FILE_SIZE
-    let n = file.read(&mut [0u8])?;
-    ensure!(n == 0, "File must be exacly {FILE_SIZE} bytes long");
-
-    Ok(buf)
-}