From 146635292369cc8a9660139d97cd9662025bd591 Mon Sep 17 00:00:00 2001
From: HampusM <hampus@hampusmat.com>
Date: Sat, 7 Oct 2023 20:05:52 +0200
Subject: fix(engine): update viewport when framebuffer changes size

---
 engine/src/lib.rs          |  6 ++++++
 engine/src/renderer/mod.rs | 20 +++++++++++---------
 engine/src/vector.rs       |  5 +++++
 3 files changed, 22 insertions(+), 9 deletions(-)

diff --git a/engine/src/lib.rs b/engine/src/lib.rs
index 618bc75..ea74fd1 100644
--- a/engine/src/lib.rs
+++ b/engine/src/lib.rs
@@ -3,6 +3,8 @@
 use glfw::Window;
 pub use glfw::WindowSize;
 
+use crate::vector::Vec2;
+
 mod renderer;
 
 pub mod vector;
@@ -27,6 +29,10 @@ impl Engine
             .make_context_current()
             .map_err(Error::ConfigureWindowFailed)?;
 
+        window.set_framebuffer_size_callback(move |new_window_size| {
+            crate::renderer::set_viewport(&Vec2::ZERO, &new_window_size);
+        });
+
         crate::renderer::initialize(&window).map_err(Error::InitializeRendererFailed)?;
 
         Ok(Self { window })
diff --git a/engine/src/renderer/mod.rs b/engine/src/renderer/mod.rs
index c34441c..9cd379d 100644
--- a/engine/src/renderer/mod.rs
+++ b/engine/src/renderer/mod.rs
@@ -1,6 +1,8 @@
 use std::ffi::{c_void, CString};
 use std::process::abort;
 
+use glfw::WindowSize;
+
 use crate::vector::Vec2;
 
 pub fn initialize(window: &glfw::Window) -> Result<(), Error>
@@ -35,15 +37,7 @@ pub fn render()
     }
 }
 
-/// Renderer error.
-#[derive(Debug, thiserror::Error)]
-pub enum Error
-{
-    #[error("Failed to get window size")]
-    GetWindowSizeFailed(#[source] glfw::Error),
-}
-
-fn set_viewport(position: &Vec2<u32>, size: &crate::WindowSize)
+pub fn set_viewport(position: &Vec2<u32>, size: &WindowSize)
 {
     unsafe {
         #[allow(clippy::cast_possible_wrap)]
@@ -55,3 +49,11 @@ fn set_viewport(position: &Vec2<u32>, size: &crate::WindowSize)
         );
     }
 }
+
+/// Renderer error.
+#[derive(Debug, thiserror::Error)]
+pub enum Error
+{
+    #[error("Failed to get window size")]
+    GetWindowSizeFailed(#[source] glfw::Error),
+}
diff --git a/engine/src/vector.rs b/engine/src/vector.rs
index 92192bf..48550fa 100644
--- a/engine/src/vector.rs
+++ b/engine/src/vector.rs
@@ -4,3 +4,8 @@ pub struct Vec2<Value>
     pub x: Value,
     pub y: Value,
 }
+
+impl Vec2<u32>
+{
+    pub const ZERO: Self = Self { x: 0, y: 0 };
+}
-- 
cgit v1.2.3-18-g5258