From 355a19e630de61397bf70b69b7ab2356318be2b8 Mon Sep 17 00:00:00 2001
From: HampusM <hampus@hampusmat.com>
Date: Sun, 19 May 2024 13:12:59 +0200
Subject: fix(glfw): check major version of GLFW shared library

---
 glfw/glfw.h      |  4 ++++
 glfw/src/init.rs | 14 ++++++++++++++
 glfw/src/lib.rs  |  3 +++
 3 files changed, 21 insertions(+)

(limited to 'glfw')

diff --git a/glfw/glfw.h b/glfw/glfw.h
index f5fa479..7b435c0 100644
--- a/glfw/glfw.h
+++ b/glfw/glfw.h
@@ -1,2 +1,6 @@
 #include <GLFW/glfw3.h>
 
+#if GLFW_VERSION_MAJOR != 3
+#error "Unsupported major version of GLFW. Must be 3"
+#endif
+
diff --git a/glfw/src/init.rs b/glfw/src/init.rs
index b42bb52..df5a989 100644
--- a/glfw/src/init.rs
+++ b/glfw/src/init.rs
@@ -1,6 +1,12 @@
+use std::ffi::c_int;
+use std::ptr::null_mut;
+
 use crate::util::is_main_thread;
 use crate::{get_glfw_error, Error};
 
+/// GLFW 3.x.x is supported
+static SUPPORTED_GLFW_VERSION_MAJOR: c_int = 3;
+
 /// Initializes GLFW and returns a initialization token.
 ///
 /// # Errors
@@ -13,6 +19,14 @@ pub fn initialize() -> Result<Glfw, Error>
         return Err(Error::NotInMainThread);
     }
 
+    let mut major: c_int = 0;
+
+    unsafe { crate::ffi::glfwGetVersion(&mut major, null_mut(), null_mut()) };
+
+    if major != SUPPORTED_GLFW_VERSION_MAJOR {
+        return Err(Error::UnsupportedVersion);
+    }
+
     // SAFETY: The current thread is the main thread
     let success = unsafe { crate::ffi::glfwInit() };
 
diff --git a/glfw/src/lib.rs b/glfw/src/lib.rs
index 7d2f25c..f858766 100644
--- a/glfw/src/lib.rs
+++ b/glfw/src/lib.rs
@@ -22,6 +22,9 @@ pub enum Error
     #[error("An internal nul byte was found in the window title")]
     InternalNulByteInWindowTitle,
 
+    #[error("This version of GLFW is unsupported")]
+    UnsupportedVersion,
+
     /// GLFW error.
     #[error("GLFW error {0} occured. {1}")]
     GlfwError(i32, String),
-- 
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