sampler start

src/bin/images.rs

@@ -0,0 +1,55 @@
+use core::cell::UnsafeCell;
+use core::include_bytes;
+use core::mem::MaybeUninit;
+
+use critical_section::Mutex;
+use embedded_graphics::pixelcolor::Rgb565;
+use tinybmp::Bmp;
+
+pub type StaticImage = Mutex<UnsafeCell<MaybeUninit<Bmp<'static, Rgb565>>>>;
+
+#[rustfmt::skip]
+pub static HUMIDITY_ICON: StaticImage = Mutex::new(UnsafeCell::new(MaybeUninit::zeroed()));
+pub static TEMPERATURE_ICON: StaticImage = Mutex::new(UnsafeCell::new(MaybeUninit::zeroed()));
+pub static VOC_ICON: StaticImage = Mutex::new(UnsafeCell::new(MaybeUninit::zeroed()));
+pub static CO2_ICON: StaticImage = Mutex::new(UnsafeCell::new(MaybeUninit::zeroed()));
+
+// Tendency indicators
+pub static TENDENCY_RISING: StaticImage = Mutex::new(UnsafeCell::new(MaybeUninit::zeroed()));
+pub static TENDENCY_STEADY: StaticImage = Mutex::new(UnsafeCell::new(MaybeUninit::zeroed()));
+pub static TENDENCY_FALLING: StaticImage = Mutex::new(UnsafeCell::new(MaybeUninit::zeroed()));
+
+macro_rules! load_image {
+    ($stat:expr, $path:expr) => {
+        critical_section::with(|cs| {
+            *$stat.borrow(cs).get() =
+                MaybeUninit::new(Bmp::from_slice(include_bytes!($path)).unwrap());
+        })
+    };
+}
+
+#[macro_export]
+macro_rules! get_image {
+    ($image:expr) => {
+        unsafe {
+            use core::mem::MaybeUninit;
+            use tinybmp::Bmp;
+            &*core::mem::transmute::<*mut MaybeUninit<Bmp<Rgb565>>, *mut Bmp<Rgb565>>(
+                critical_section::with(|cs| $image.borrow(cs).get()),
+            )
+        }
+    };
+}
+
+pub fn prepare_images() {
+    unsafe {
+        load_image!(HUMIDITY_ICON, "../../assets/humidity-icon.bmp");
+        load_image!(TEMPERATURE_ICON, "../../assets/temperature-icon.bmp");
+        load_image!(VOC_ICON, "../../assets/voc-icon.bmp");
+        load_image!(CO2_ICON, "../../assets/co2-icon.bmp");
+
+        load_image!(TENDENCY_RISING, "../../assets/indic-rising.bmp");
+        load_image!(TENDENCY_STEADY, "../../assets/indic-steady.bmp");
+        load_image!(TENDENCY_FALLING, "../../assets/indic-falling.bmp");
+    }
+}