feat(opengl-bindings): add fn to set depth function

2 files changed, 46 insertions, 7 deletions

diff --git a/opengl-bindings/Cargo.toml b/opengl-bindings/Cargo.toml
index c08b94a..f2252a7 100644
--- a/opengl-bindings/Cargo.toml
+++ b/opengl-bindings/Cargo.toml
@@ -67,5 +67,6 @@ gl_commands = [
 	"BindBufferBase",
 	"BlendFunc",
 	"BlendEquation",
-	"Scissor"
+	"Scissor",
+	"DepthFunc",
 ]
diff --git a/opengl-bindings/src/misc.rs b/opengl-bindings/src/misc.rs
index 047221b..a0d36e3 100644
--- a/opengl-bindings/src/misc.rs
+++ b/opengl-bindings/src/misc.rs
@@ -81,10 +81,7 @@ pub fn get_viewport(
     (pos, size)
 }
 
-pub fn clear_buffers(
-    current_context: &MaybeCurrentContextWithFns,
-    mask: BufferClearMask,
-)
+pub fn clear_buffers(current_context: &MaybeCurrentContextWithFns, mask: BufferClearMask)
 {
     unsafe {
         current_context.fns().Clear(mask.bits());
@@ -132,8 +129,7 @@ pub fn set_enabled(
 }
 
 #[must_use]
-pub fn get_context_flags(current_context: &MaybeCurrentContextWithFns)
-    -> ContextFlags
+pub fn get_context_flags(current_context: &MaybeCurrentContextWithFns) -> ContextFlags
 {
     let mut context_flags = crate::sys::types::GLint::default();
 
@@ -173,6 +169,16 @@ pub fn define_scissor_box(
     }
 }
 
+pub fn set_depth_function(
+    current_context: &MaybeCurrentContextWithFns,
+    depth_function: DepthFunction,
+)
+{
+    unsafe {
+        current_context.fns().DepthFunc(depth_function as u32);
+    }
+}
+
 bitflags! {
     #[derive(Debug, Clone, Copy)]
     pub struct BufferClearMask: u32 {
@@ -223,6 +229,38 @@ pub struct ContextFlags: u32 {
 }
 }
 
+#[derive(Debug, Default, Clone, Copy)]
+#[repr(u32)]
+pub enum DepthFunction
+{
+    /// Never passes.
+    Never = crate::sys::NEVER,
+
+    /// Passes if the incoming depth value is less than the stored depth value.
+    #[default]
+    Less = crate::sys::LESS,
+
+    /// Passes if the incoming depth value is equal to the stored depth value.
+    Equal = crate::sys::EQUAL,
+
+    /// Passes if the incoming depth value is less than or equal to the stored depth
+    /// value.
+    LessOrEqual = crate::sys::LEQUAL,
+
+    /// Passes if the incoming depth value is greater than the stored depth value.
+    Greater = crate::sys::GREATER,
+
+    /// Passes if the incoming depth value is not equal to the stored depth value.
+    NotEqual = crate::sys::NOTEQUAL,
+
+    /// Passes if the incoming depth value is greater than or equal to the stored depth
+    /// value.
+    GreaterOrEqual = crate::sys::GEQUAL,
+
+    /// Always passes.
+    Always = crate::sys::ALWAYS,
+}
+
 #[derive(Debug, thiserror::Error)]
 pub enum SetViewportError
 {