From da329909f93597970afd169cee28ece3bee7127b Mon Sep 17 00:00:00 2001
From: HampusM <hampus@hampusmat.com>
Date: Sun, 15 Oct 2023 00:06:07 +0200
Subject: feat(engine): add logging OpenGL debug messages

---
 engine/src/renderer/mod.rs | 49 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)

(limited to 'engine/src/renderer')

diff --git a/engine/src/renderer/mod.rs b/engine/src/renderer/mod.rs
index 4ed3c0a..cc1631f 100644
--- a/engine/src/renderer/mod.rs
+++ b/engine/src/renderer/mod.rs
@@ -3,6 +3,8 @@ use std::process::abort;
 
 use glfw::WindowSize;
 
+#[cfg(feature = "debug")]
+use crate::opengl::debug::{MessageSeverity, MessageSource, MessageType};
 use crate::opengl::shader::Program as ShaderProgram;
 use crate::opengl::vertex_array::{PrimitiveKind, VertexArray};
 use crate::opengl::vertex_buffer::{BufferUsage, VertexBuffer};
@@ -28,6 +30,22 @@ pub fn initialize(window: &glfw::Window) -> Result<(), Error>
         }
     });
 
+    #[cfg(feature = "debug")]
+    {
+        use crate::opengl::debug::{
+            enable_debug_output,
+            set_debug_message_callback,
+            set_debug_message_control,
+            MessageIdsAction,
+        };
+
+        enable_debug_output();
+
+        set_debug_message_callback(opengl_debug_message_cb);
+
+        set_debug_message_control(None, None, None, &[], MessageIdsAction::Disable);
+    }
+
     let window_size = window.size().map_err(Error::GetWindowSizeFailed)?;
 
     set_viewport(&Vec2 { x: 0, y: 0 }, &window_size);
@@ -35,6 +53,37 @@ pub fn initialize(window: &glfw::Window) -> Result<(), Error>
     Ok(())
 }
 
+#[cfg(feature = "debug")]
+#[tracing::instrument(skip_all)]
+fn opengl_debug_message_cb(
+    source: MessageSource,
+    ty: MessageType,
+    id: u32,
+    severity: MessageSeverity,
+    message: &str,
+)
+{
+    use tracing::{event, Level};
+
+    macro_rules! create_event {
+        ($level: expr) => {
+            event!($level, ?source, ?ty, id, ?severity, message);
+        };
+    }
+
+    match ty {
+        MessageType::Error => {
+            create_event!(Level::ERROR);
+        }
+        MessageType::Other => {
+            create_event!(Level::INFO);
+        }
+        _ => {
+            create_event!(Level::WARN);
+        }
+    };
+}
+
 pub fn render<'renderable>(renderables: impl IntoIterator<Item = &'renderable Renderable>)
 {
     clear_buffers(BufferClearMask::COLOR);
-- 
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