diff --git a/game/src/engine/game.rs b/game/src/engine/game.rs
index efa815f..1525dbd 100644
--- a/game/src/engine/game.rs
+++ b/game/src/engine/game.rs
@@ -19,6 +19,8 @@ pub trait Renderer {
     fn draw_line(&mut self, from: V2, to: V2, color: Color);
     fn draw_triangle(&mut self, triangle: Triangle2, color: Color);
     fn draw_triangles(&mut self, triangles: &[Triangle2], color: Color);
+    fn screen_width(&self) -> f64;
+    fn screen_height(&self) -> f64;
 }
 
 #[derive(Clone, Copy)]
diff --git a/game/src/engine/sdl_io.rs b/game/src/engine/sdl_io.rs
index 23b48b7..6fd012f 100644
--- a/game/src/engine/sdl_io.rs
+++ b/game/src/engine/sdl_io.rs
@@ -21,9 +21,6 @@ use crate::engine::{
     Color, Renderer, Triangle2,
 };
 
-pub static WIDTH: f64 = 1920.0;
-pub static HEIGHT: f64 = 1080.0;
-
 pub struct SdlIo<'me> {
     sdl_context: Sdl,
     video_subsystem: VideoSubsystem,
@@ -86,7 +83,7 @@ impl SdlIo<'_> {
         let video_subsystem = sdl_context.video().unwrap();
         let ttf_context = sdl3::ttf::init().map_err(|e| e.to_string())?;
         let window = video_subsystem
-            .window("Game", WIDTH as u32, HEIGHT as u32)
+            .window("Game", 1920, 1080)
             .position_centered()
             .fullscreen()
             .build()
@@ -164,12 +161,12 @@ impl SdlIo<'_> {
 
     /// world space to screen space
     fn scale_w2s(&self, v: V2) -> V2 {
-        let factor = WIDTH / 2.0;
+        let factor = self.screen_width() / 2.0;
         V2(v.0 * factor, v.1 * factor)
     }
     /// world space to screen space.
     fn translate_w2s(&self, v: V2) -> V2 {
-        let middle = V2(WIDTH / 2.0, HEIGHT / 2.0);
+        let middle = V2(self.screen_width() / 2.0, self.screen_height() / 2.0);
         V2(v.0 + middle.0, middle.1 - v.1)
     }
 
@@ -270,6 +267,15 @@ impl Renderer for SdlIo<'_> {
         let texture = self.texture_handler.get(id);
         V2(texture.width() as f64, texture.height() as f64)
     }
+
+    fn screen_width(&self) -> f64 {
+        let (size, _) = self.canvas.window().size();
+        size as f64
+    }
+    fn screen_height(&self) -> f64 {
+        let (_, size) = self.canvas.window().size();
+        size as f64
+    }
 }
 
 impl From<V2> for FPoint {
diff --git a/game/src/main.rs b/game/src/main.rs
index 69450ac..165317e 100644
--- a/game/src/main.rs
+++ b/game/src/main.rs
@@ -13,7 +13,7 @@ use std::{
 };
 
 use crate::{
-    engine::{Color, Key, Renderer, Scene, Shape, HEIGHT, V2, V3, WIDTH},
+    engine::{Color, Key, Renderer, Scene, Shape, V2, V3},
     server::Server,
 };
 
@@ -483,7 +483,7 @@ impl<R: Renderer> engine::Game<R> for Game {
                 Color::Green,
             );
             let V2(width, _height) = r.query_texture(id);
-            r.draw_texture(id, V2(WIDTH / 2.0 - width / 2.0, 50.0));
+            r.draw_texture(id, V2(r.screen_width() / 2.0 - width / 2.0, 50.0));
         }
         if let Some(joever_timer) = self.joever_timer {
             let id = r.load_text(
@@ -494,7 +494,10 @@ impl<R: Renderer> engine::Game<R> for Game {
             let V2(width, height) = r.query_texture(id);
             r.draw_texture(
                 id,
-                V2(WIDTH / 2.0 - width / 2.0, HEIGHT / 2.0 - height / 2.0),
+                V2(
+                    r.screen_width() / 2.0 - width / 2.0,
+                    r.screen_height() / 2.0 - height / 2.0,
+                ),
             );
         }
     }