diff --git a/Cargo.lock b/Cargo.lock
index da75dd1..73484b7 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -5,3 +5,12 @@ version = 4
 [[package]]
 name = "daria"
 version = "0.1.0"
+dependencies = [
+ "libc",
+]
+
+[[package]]
+name = "libc"
+version = "1.0.0-alpha.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e136bfa874086c78f34d6eba98c423fefe464ce57f38164d16893ba8ed358e70"
diff --git a/Cargo.toml b/Cargo.toml
index 41420e2..e3e8550 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -10,3 +10,5 @@ path = "src/l3/r4/r4d.rs"
 [lib]
 name = "alice_and_misc"
 path = "src/l2/allie_rs/lib.rs"
+[dependencies]
+libc = "1.0.0-alpha.3"
diff --git a/src/l2/allie_cpp/glue.c b/src/l2/allie_cpp/glue.c
index 6fcc9da..7afd745 100644
--- a/src/l2/allie_cpp/glue.c
+++ b/src/l2/allie_cpp/glue.c
@@ -25,6 +25,7 @@ void allie_Alice_lucy_cache_add_glyphs(Alice* alice, VecLucyGlyphCachingRequest
     Alice_lucy_cache_add_glyphs(alice, req);
 }
 
+// todo: transition to cvec4 from vec4 color (vec4 color makes no sense for fonts)
 void allie_Alice_lucy_renderer_add_simple_label(Alice* alice, RBTreeNodeLucyFaceFixedSize* ffs,
     vec4 color, S32 additional_y_advance, SpanU8 text, ivec2 start_pos
     ) {
diff --git a/src/l2/allie_rs/alice.rs b/src/l2/allie_rs/alice.rs
new file mode 100644
index 0000000..ab7eb91
--- /dev/null
+++ b/src/l2/allie_rs/alice.rs
@@ -0,0 +1,103 @@
+use std::ffi::{c_void};
+use std::marker::PhantomData;
+use crate::geom::{*};
+use crate::allie;
+use crate::allie::CSpan;
+use crate::uint_segments::{U32Segment};
+
+pub struct LucyFaceFixedSize {
+    opa: allie::LucyFaceFixedSize,
+}
+
+impl Drop for LucyFaceFixedSize {
+    fn drop(&mut self) {
+        // todo: so something
+    }
+}
+
+pub struct LucyFace {
+    opa: allie::LucyFace,
+}
+
+impl LucyFace {
+    pub fn of_size(&self, size: u32) -> LucyFaceFixedSize{
+        LucyFaceFixedSize{opa: unsafe { allie::LucyFace_of_size(self.opa, size) }}
+    }
+}
+
+
+impl Drop for LucyFace {
+    fn drop(&mut self) {
+        // todo: oh what should I do
+    }
+}
+
+
+pub struct Alice {
+    opa: allie::Alice,
+}
+
+pub struct AliceCallbacks<'a> {
+    pub on_wl_pointer_button: Box<dyn FnMut(u32, u32) + 'a>,
+    pub on_wl_keyboard_key: Box<dyn FnMut(u32, u32) + 'a>,
+    pub on_another_frame: Box<dyn FnMut(f32) + 'a>,
+    pub on_wl_pointer_motion: Box<dyn FnMut(vec2) +'a>,
+}
+
+pub struct LucyGlyphCachingRequest<'a> {
+    pub sized_face: &'a mut LucyFaceFixedSize,
+    pub codepoint_ranges: Vec<U32Segment>,
+}
+impl<'a> From<& LucyGlyphCachingRequest<'a>> for allie::LucyGlyphCachingRequest<'a> {
+    fn from(value: & LucyGlyphCachingRequest<'a>) -> Self {
+        Self{phantom: PhantomData,
+            sized_face: value.sized_face.opa,
+            codepoint_ranges: allie::CVec::<U32Segment>::from(&value.codepoint_ranges)}
+    }
+}
+
+
+impl Alice {
+    pub fn new() -> Self {
+        Alice{opa: unsafe { allie::Alice_new() }}
+    }
+
+    pub fn mainloop<'a>(&'a self, mut cb: AliceCallbacks<'a>) {
+        let guest_data = (&raw mut cb) as allie::Alice;
+
+        let a_cb = allie::AliceCallbacks {
+            guest: guest_data,
+            on_wl_pointer_button: allie::AliceCallbacks_on_wl_pointer_button,
+            on_wl_keyboard_key: allie::AliceCallbacks_on_wl_keyboard_key,
+            on_another_frame: allie::AliceCallbacks_on_another_frame,
+            on_wl_pointer_motion: allie::AliceCallbacks_on_wl_pointer_motion,
+        };
+
+        unsafe{ allie::Alice_mainloop(self.opa, &a_cb) };
+    }
+
+    pub fn set_clear_color(&self, color: vec4) {
+        unsafe { allie::Alice_set_clear_color(self.opa, color) };
+    }
+
+    pub fn new_lucy_face(&self, path: &str) -> LucyFace{
+        LucyFace{opa: unsafe { allie::Alice_new_LucyFace(self.opa, allie::CVec::<u8>::from(path)) } }
+    }
+
+    pub fn lucy_cache_add_glyphs(&self, req: Vec<LucyGlyphCachingRequest>){
+        let a_req = allie::CVec::<allie::LucyGlyphCachingRequest>::from(&req);
+        unsafe { allie::Alice_lucy_cache_add_glyphs(self.opa, a_req) };
+    }
+
+    pub fn lucy_renderer_add_simple_label(&self, ffs: &LucyFaceFixedSize, color: vec4,
+              additional_y_advance: i32, text: &str, start_pos: ivec2
+    ) {
+        unsafe { allie::Alice_lucy_renderer_add_simple_label(self.opa, ffs.opa, color,
+            additional_y_advance, allie::CSpan::<u8>::from(text), start_pos) }
+    }
+}
+impl Drop for Alice {
+    fn drop(&mut self) {
+        // todo: do something
+    }
+}
diff --git a/src/l2/allie_rs/allie.rs b/src/l2/allie_rs/allie.rs
new file mode 100644
index 0000000..08386e4
--- /dev/null
+++ b/src/l2/allie_rs/allie.rs
@@ -0,0 +1,131 @@
+use std::ffi::c_void;
+use crate::alice;
+use crate::geom::{vec2, vec4, ivec2};
+use std::ptr::copy_nonoverlapping;
+use std::ptr;
+use libc::{calloc, free};
+use std::mem::size_of;
+use std::marker::PhantomData;
+use crate::uint_segments::{*};
+
+/* usize is u64, ok? */
+// fn safe_calloc(nobj: usize, size: usize) -> *mut c_void{
+//     let p = unsafe { calloc(nobj, size) };
+//     if (p.is_null()){ panic!("calloc: Not enough memory\n") }
+//     p
+// }
+
+fn safe_calloc<T>(nobj: usize) ->* mut T {
+        let p = unsafe { calloc(nobj, size_of::<T>()) };
+        if (p.is_null()){ panic!("calloc: Not enough memory\n") }
+        p as *mut T
+}
+
+pub type Alice = *mut c_void;
+pub type LucyFace = *mut c_void;
+pub type LucyFaceFixedSize = *mut c_void;
+
+#[repr(C)]
+pub struct CSpan<'a, T> {
+    phantom: PhantomData<&'a T>,
+    data: *const T,
+    len: u64
+}
+
+impl<'a> From<&'a str> for CSpan<'a, u8> {
+    fn from(s: &'a str) -> Self {
+        let data: *const u8 = s.as_ptr();
+        Self{phantom: PhantomData, data, len: s.len() as u64}
+    }
+}
+
+
+#[repr(C)]
+pub struct CVec<T> {
+    buf: *mut T,
+    len: u64, capacity: u64
+}
+
+impl<'a, Td, Ts> From<&'a Vec<Ts>> for CVec<Td> where Td: From<&'a Ts>{
+    fn from(value: &'a Vec<Ts>) -> Self {
+        let buf: *mut Td = safe_calloc(value.len());
+        for (i, src) in value.iter().enumerate() {
+            unsafe { ptr::write(buf.add(i), Td::from(src)) };
+        }
+        Self {buf, len: value.len() as u64, capacity: value.len() as u64}
+    }
+}
+
+impl From<&str> for CVec<u8> {
+    fn from(s: &str) -> Self {
+        let buf: *mut u8 = safe_calloc(s.len());
+        unsafe { copy_nonoverlapping(s.as_ptr(), buf, s.len()) };
+        Self{buf, len: s.len() as u64, capacity: s.len() as u64}
+    }
+}
+
+impl<T> Drop for CVec<T>{
+    fn drop(&mut self) {
+        unsafe { free(self.buf as *mut c_void) };
+    }
+}
+
+#[repr(C)]
+pub struct LucyGlyphCachingRequest<'a> {
+    pub phantom: PhantomData<&'a u8>,
+    pub sized_face: LucyFaceFixedSize,
+    pub codepoint_ranges: CVec<U32Segment>,
+}
+/* Copying from Rust analog type to C allie type will be implemented outside */
+
+
+#[repr(C)]
+pub struct AliceCallbacks {
+    pub guest: Alice,
+    /* guest data, button, btn action */
+    pub on_wl_pointer_button: extern "C" fn (Alice, u32, u32),
+    /* guest data, keysym, key action (wl_keyboard_key_state) */
+    pub on_wl_keyboard_key: extern "C" fn (Alice, u32, u32),
+    /* guest data, passed time */
+    pub on_another_frame: extern "C" fn (Alice, f32),
+    pub on_wl_pointer_motion: extern "C" fn (Alice, vec2),
+}
+
+unsafe extern "C" {
+    #[link_name="Alice_new"]
+    pub fn Alice_new() -> Alice;
+    #[link_name="Alice_mainloop"]
+    pub fn Alice_mainloop(alice: Alice, cb: *const AliceCallbacks);
+    #[link_name="Alice_set_clear_color"]
+    pub fn Alice_set_clear_color(alice: Alice, color: vec4);
+    #[link_name="Alice_new_LucyFace"]
+    pub fn Alice_new_LucyFace(alice: Alice, path: CVec<u8>) -> LucyFace;
+    #[link_name="LucyFace_of_size"]
+    pub fn LucyFace_of_size(alice: LucyFace, size: u32) -> LucyFaceFixedSize;
+    #[link_name="Alice_lucy_cache_add_glyphs"]
+    pub fn Alice_lucy_cache_add_glyphs(alice: Alice, req: CVec<LucyGlyphCachingRequest>);
+    #[link_name="Alice_lucy_renderer_add_simple_label"]
+    pub fn Alice_lucy_renderer_add_simple_label(  /* todo: make color cvec4 */
+        alice: Alice, ffs: LucyFaceFixedSize, 
+        color: vec4, additional_y_advance: i32, text: CSpan<u8>, start_pos: ivec2);
+}
+
+pub extern "C" fn AliceCallbacks_on_wl_pointer_button(dt: Alice, button: u32, act: u32){
+    let cb: &mut alice::AliceCallbacks =  unsafe { &mut *(dt as *mut alice::AliceCallbacks) };
+    (cb.on_wl_pointer_button)(button, act);
+}
+
+pub extern "C" fn AliceCallbacks_on_wl_keyboard_key(dt: Alice, keysym: u32, act: u32){
+    let cb: &mut alice::AliceCallbacks =  unsafe { &mut *(dt as *mut alice::AliceCallbacks) };
+    (cb.on_wl_keyboard_key)(keysym, act);
+}
+
+pub extern "C" fn AliceCallbacks_on_another_frame(dt: Alice, fl: f32){
+    let cb: &mut alice::AliceCallbacks =  unsafe { &mut *(dt as *mut alice::AliceCallbacks) };
+    (cb.on_another_frame)(fl);
+}
+
+pub extern "C" fn AliceCallbacks_on_wl_pointer_motion(dt: Alice, pos: vec2){
+    let cb: &mut alice::AliceCallbacks =  unsafe { &mut *(dt as *mut alice::AliceCallbacks) };
+    (cb.on_wl_pointer_motion)(pos);
+}
diff --git a/src/l2/allie_rs/geom.rs b/src/l2/allie_rs/geom.rs
index 0504503..82aba30 100644
--- a/src/l2/allie_rs/geom.rs
+++ b/src/l2/allie_rs/geom.rs
@@ -9,6 +9,7 @@ impl AssertTrue for Assert<true>{}
 
 /* Turn out for tuple struct, where clause goes after the field list */
 #[repr(C)]
+#[derive(Clone, Copy, Debug)]
 pub struct GeomVec<T, const N: usize> (pub [T; N]) where T: Copy + Clone;
 
 impl<T, const N: usize> Add for GeomVec<T, N> where
@@ -21,19 +22,6 @@ impl<T, const N: usize> Add for GeomVec<T, N> where
     }
 }
 
-trait HasY {
-    fn has_foo() -> bool {
-        return true;
-    }
-}
-
-// impl<T, const N: usize> HasY for GeomVec<T, N> where
-//     T: Copy + Clone,
-//     Assert<{N >= 1}> : AssertTrue {
-//
-// }
-
-
 impl<T, const N: usize> GeomVec<T, N> where
     T: Copy + Clone,
     Assert<{N >= 1}> : AssertTrue {
diff --git a/src/l2/allie_rs/lib.rs b/src/l2/allie_rs/lib.rs
index e6d24d7..a371be8 100644
--- a/src/l2/allie_rs/lib.rs
+++ b/src/l2/allie_rs/lib.rs
@@ -9,89 +9,6 @@
 /* *c_void is nothing special, it is the same as *u8 for example */
 pub mod geom;
 pub mod int_primitives;
-
-use std::ffi::{c_void};
-use geom::{*};
-
-type VoidPtr = *mut c_void;
-
-#[repr(C)]
-struct allie_AliceCallbacks{
-    guest: VoidPtr,
-    /* guest data, button, btn action */
-    on_wl_pointer_button: extern "C" fn (VoidPtr, u32, u32),
-    /* guest data, keysym, key action (wl_keyboard_key_state) */
-    on_wl_keyboard_key: extern "C" fn (VoidPtr, u32, u32),
-    /* guest data, passed time */
-    on_another_frame: extern "C" fn (VoidPtr, f32),
-    on_wl_pointer_motion: extern "C" fn (VoidPtr, vec2),
-}
-
-unsafe extern "C" {
-    #[link_name="Alice_new"]
-    fn allie_Alice_new() -> *mut c_void;
-    #[link_name="Alice_mainloop"]
-    fn allie_Alice_mainloop(alice: VoidPtr, cb: *const allie_AliceCallbacks);
-    #[link_name="Alice_set_clear_color"]
-    fn allie_Alice_set_clear_color(alice: VoidPtr, color: vec4);
-}
-
-pub struct Alice {
-    opa: *mut c_void,
-}
-
-pub struct AliceCallbacks {
-    pub on_wl_pointer_button: Box<dyn FnMut(u32, u32)>,
-    pub on_wl_keyboard_key: Box<dyn FnMut(u32, u32)>,
-    pub on_another_frame: Box<dyn FnMut(f32)>,
-    pub on_wl_pointer_motion: Box<dyn FnMut(vec2)>,
-}
-
-extern "C" fn allie_AliceCallbacks_on_wl_pointer_button(dt: VoidPtr, button: u32, act: u32){
-    let cb: &mut AliceCallbacks =  unsafe { &mut *(dt as *mut AliceCallbacks) };
-    (cb.on_wl_pointer_button)(button, act);
-}
-
-extern "C" fn allie_AliceCallbacks_on_wl_keyboard_key(dt: VoidPtr, keysym: u32, act: u32){
-    let cb: &mut AliceCallbacks =  unsafe { &mut *(dt as *mut AliceCallbacks) };
-    (cb.on_wl_keyboard_key)(keysym, act);
-}
-
-extern "C" fn allie_AliceCallbacks_on_another_frame(dt: VoidPtr, fl: f32){
-    let cb: &mut AliceCallbacks =  unsafe { &mut *(dt as *mut AliceCallbacks) };
-    (cb.on_another_frame)(fl);
-}
-
-extern "C" fn allie_AliceCallbacks_on_wl_pointer_motion(dt: VoidPtr, pos: vec2){
-    let cb: &mut AliceCallbacks =  unsafe { &mut *(dt as *mut AliceCallbacks) };
-    (cb.on_wl_pointer_motion)(pos);
-}
-
-impl Alice {
-    pub fn new() -> Self {
-        Alice{opa: unsafe { allie_Alice_new() }}
-    }
-
-    pub fn mainloop(&self, mut cb: AliceCallbacks) {
-        let guest_data = (&raw mut cb) as VoidPtr;
-
-        let a_cb = allie_AliceCallbacks {
-            guest: guest_data,
-            on_wl_pointer_button: allie_AliceCallbacks_on_wl_pointer_button,
-            on_wl_keyboard_key: allie_AliceCallbacks_on_wl_keyboard_key,
-            on_another_frame: allie_AliceCallbacks_on_another_frame,
-            on_wl_pointer_motion: allie_AliceCallbacks_on_wl_pointer_motion,
-        };
-
-        unsafe{ allie_Alice_mainloop(self.opa, &a_cb) };
-    }
-
-    pub fn set_clear_color(&self, color: vec4) {
-        unsafe { allie_Alice_set_clear_color(self.opa, color) };
-    }
-}
-impl Drop for Alice {
-    fn drop(&mut self) {
-        // todo: do something
-    }
-}
+mod allie;
+pub mod alice;
+pub mod uint_segments;
diff --git a/src/l2/allie_rs/uint_segments.rs b/src/l2/allie_rs/uint_segments.rs
new file mode 100644
index 0000000..579d918
--- /dev/null
+++ b/src/l2/allie_rs/uint_segments.rs
@@ -0,0 +1,20 @@
+/* I am not proud of this */
+
+#[repr(C)]
+#[derive(Copy, Clone)]
+pub struct UIntSegment<T: Copy>{
+    pub start: T,
+    pub len: T,
+}
+
+impl<T: Copy> UIntSegment<T> {
+    pub fn new(start: T, len: T) -> Self{ Self {start, len} }
+}
+
+pub type U32Segment = UIntSegment<u32>;
+pub type U64Segment = UIntSegment<u64>;
+
+/* Common sense decided to die */
+impl<T: Copy> From<& UIntSegment<T>> for UIntSegment<T> {
+    fn from(value: &UIntSegment<T>) -> Self { *value }
+}
\ No newline at end of file
diff --git a/src/l3/r4/r4d.rs b/src/l3/r4/r4d.rs
index 9b65fb7..c76d0ce 100644
--- a/src/l3/r4/r4d.rs
+++ b/src/l3/r4/r4d.rs
@@ -1,11 +1,18 @@
-use alice_and_misc::{*};
+use alice_and_misc::alice::{*};
 use alice_and_misc::geom::{*};
+use alice_and_misc::uint_segments::U32Segment;
 
 fn main() {
     let v = vec2(1.0, 2.0);
 
-    let alice = Alice::new();
-    alice.set_clear_color(vec4(0., 1., 0., 1.));
+    let mut alice = Alice::new();
+    alice.set_clear_color(vec4(0., 0.5, 0.5, 1.));
+    let mut face = alice.new_lucy_face("./src/l3/fonts/DMSerifText-Regular.ttf");
+    let mut face_40 = face.of_size(40);
+    alice.lucy_cache_add_glyphs(vec![
+        LucyGlyphCachingRequest{sized_face: &mut face_40,
+            codepoint_ranges: vec![U32Segment::new(32, 126 - 32 + 1)]}
+    ]);
     alice.mainloop(AliceCallbacks{
         on_wl_pointer_button: Box::new(|_: u32, _: u32| {
             println!("pointer button")
@@ -14,7 +21,8 @@ fn main() {
             println!("keyboard key");
         }),
         on_another_frame: Box::new(|_: f32| {
-
+            alice.lucy_renderer_add_simple_label(&face_40, vec4(1., 0.5, 0., 1.),
+            0, "Hello from Rust", ivec2(40, 40));
         }),
         on_wl_pointer_motion: Box::new(|_: vec2| {
             println!("pointer motion");