1 files changed, 30 insertions, 0 deletions
diff --git a/engine/src/opengl/util.rs b/engine/src/opengl/util.rs
new file mode 100644
index 0000000..e60778f
--- /dev/null
+++ b/engine/src/opengl/util.rs
@@ -0,0 +1,30 @@
+// May only be used when certain crate features are enabled
+#![allow(unused_macros, unused_imports)]
+
+macro_rules! gl_enum {
+    (
+        $visibility: vis enum $name: ident
+        {$(
+            $variant: ident = gl::$gl_enum: ident,
+        )+}
+    ) => {
+        #[derive(Debug, Clone, Copy)]
+        #[repr(u32)]
+        $visibility enum $name
+        {$(
+            $variant = gl::$gl_enum,
+        )+}
+
+        impl $name {
+            fn from_gl(num: gl::types::GLenum) -> Option<Self>
+            {
+                match num {
+                    $(gl::$gl_enum => Some(Self::$variant),)+
+                    _ => None
+                }
+            }
+        }
+    };
+}
+
+pub(crate) use gl_enum;