chore(glfw): add OpenGL crate feature

2 files changed, 7 insertions, 2 deletions

diff --git a/glfw/Cargo.toml b/glfw/Cargo.toml
index 71d4913..110ed96 100644
--- a/glfw/Cargo.toml
+++ b/glfw/Cargo.toml
@@ -3,6 +3,9 @@ name = "glfw"
 version = "0.1.0"
 edition = "2021"
 
+[features]
+opengl = []
+
 [dependencies]
 libc = "0.2.148"
 thiserror = "1.0.49"
diff --git a/glfw/src/window.rs b/glfw/src/window.rs
index 3926cce..4c7652c 100644
--- a/glfw/src/window.rs
+++ b/glfw/src/window.rs
@@ -1,5 +1,5 @@
 use std::cell::RefCell;
-use std::ffi::{c_int, CStr, CString};
+use std::ffi::{c_int, CString};
 use std::hint::unreachable_unchecked;
 use std::panic::catch_unwind;
 use std::ptr::null_mut;
@@ -21,6 +21,7 @@ impl Window
     /// # Errors
     /// Will return `Err` if a GLFW platform error occurs or if no OpenGL context is
     /// present.
+    #[cfg(feature = "opengl")]
     pub fn make_context_current(&self) -> Result<(), Error>
     {
         unsafe { crate::ffi::glfwMakeContextCurrent(self.handle) };
@@ -36,9 +37,10 @@ impl Window
     /// # Errors
     /// Will return `Err` if a GLFW platform error occurs or if no current context has
     /// been set.
+    #[cfg(feature = "opengl")]
     pub fn get_proc_address(
         &self,
-        proc_name: &CStr,
+        proc_name: &std::ffi::CStr,
     ) -> Result<unsafe extern "C" fn(), Error>
     {
         let proc_addr = unsafe { crate::ffi::glfwGetProcAddress(proc_name.as_ptr()) };