fixup! feat(core): introduce new drawing library

core/embed/rust/src/trezorhal/bitblt.rs

@@ -190,8 +190,8 @@ pub struct BitBltCopy<'a> {
 }
 
 impl<'a> BitBltCopy<'a> {
-    /// Prepares `BitBltCopy` structure for copying or blending a part of the source
-    /// bitmap to the destination bitmap or display.
+    /// Prepares `BitBltCopy` structure for copying or blending a part of the
+    /// source bitmap to the destination bitmap or display.
     ///
     /// - `r` is the rectangle in the destination bitmap.
     /// - `clip` is the clipping rectangle and must be completely inside the

core/embed/rust/src/ui/shape/cache/zlib_cache.rs

@@ -118,11 +118,16 @@ impl<'a> ZlibCache<'a> {
 
     fn select_slot_for_reuse(&self) -> Result<usize, ()> {
         if self.slots.capacity() > 0 {
+            // Try to find a free slot.  If there's no free slot,
+            // select the one that performed the least amount of work
+            // based on the offset in the uncompressed data.
             let mut selected = 0;
             for (i, slot) in self.slots.iter().enumerate() {
                 if slot.dc.is_none() {
                     selected = i;
                     break;
+                } else if slot.offset < self.slots[selected].offset {
+                    selected = i;
                 }
             }
             Ok(selected)

core/embed/rust/src/ui/shape/display/nofb_rgb565.rs

@@ -1,4 +1,7 @@
-use crate::trezorhal::{bitblt::{BitBltCopy, BitBltFill}, display};
+use crate::trezorhal::{
+    bitblt::{BitBltCopy, BitBltFill},
+    display,
+};
 
 use crate::ui::{
     display::Color,