fix(core/rust): fix uzlib window allocation

[no changelog]

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

@@ -13,25 +13,25 @@ impl Default for ffi::uzlib_uncomp {
 pub struct UzlibContext<'a> {
     uncomp: ffi::uzlib_uncomp,
     src_data: PhantomData<&'a [u8]>,
-    window: Option<[u8; UZLIB_WINDOW_SIZE]>,
 }
 
 impl<'a> UzlibContext<'a> {
-    pub fn new(src: &'a [u8], use_window: bool) -> Self {
+    pub fn new(src: &'a [u8], window: Option<&'a mut [u8; UZLIB_WINDOW_SIZE]>) -> Self {
-        let window = use_window.then_some([0_u8; UZLIB_WINDOW_SIZE]);
-
         let mut ctx = Self {
             uncomp: uzlib_uncomp::default(),
             src_data: Default::default(),
-            window,
         };
 
         unsafe {
             ctx.uncomp.source = src.as_ptr();
             ctx.uncomp.source_limit = src.as_ptr().add(src.len());
 
-            if let Some(w) = ctx.window {
+            if let Some(w) = window {
-                ffi::uzlib_uncompress_init(&mut ctx.uncomp, w.as_ptr() as _, w.len() as u32);
+                ffi::uzlib_uncompress_init(
+                    &mut ctx.uncomp,
+                    w.as_mut_ptr() as _,
+                    UZLIB_WINDOW_SIZE as u32,
+                );
             } else {
                 ffi::uzlib_uncompress_init(&mut ctx.uncomp, ptr::null_mut(), 0);
             }

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

@@ -1,14 +1,18 @@
-use super::constant;
+use super::{
+    constant,
+    geometry::{Offset, Point, Rect},
+};
 use crate::{
     error::Error,
     time::Duration,
-    trezorhal::{display, qr, time, uzlib},
+    trezorhal::{
+        display, qr, time,
+        uzlib::{UzlibContext, UZLIB_WINDOW_SIZE},
+    },
     ui::lerp::Lerp,
 };
 use core::slice;
 
-use super::geometry::{Offset, Point, Rect};
-
 pub fn backlight() -> i32 {
     display::backlight(-1)
 }
@@ -110,7 +114,9 @@ pub fn icon_rust(center: Point, data: &[u8], fg_color: Color, bg_color: Color) {
     set_window(clamped);
 
     let mut dest = [0_u8; 1];
-    let mut ctx = uzlib::UzlibContext::new(&data[12..], true);
+
+    let mut window = [0; UZLIB_WINDOW_SIZE];
+    let mut ctx = UzlibContext::new(&data[12..], Some(&mut window));
 
     for py in area.y0..area.y1 {
         for px in area.x0..area.x1 {
@@ -317,7 +323,7 @@ pub fn rect_rounded2_partial(
             );
             icon_area_clamped = icon_area.clamp(constant::screen());
 
-            let mut ctx = uzlib::UzlibContext::new(&icon_bytes[12..], false);
+            let mut ctx = UzlibContext::new(&icon_bytes[12..], None);
             unwrap!(ctx.uncompress(&mut icon_data), "Decompression failed");
             icon_colortable = get_color_table(icon_color, bg_color);
             icon_width = toif_info.width.into();