From 5c338b18fafdd5ad348b168693993c6aebe6e029 Mon Sep 17 00:00:00 2001
From: Tsuki <qwin7989@gmail.com>
Date: Tue, 3 Sep 2024 16:05:22 +0800
Subject: [PATCH] add debug layer

---
 radar-g/src/widgets/render/imp.rs | 60 ++++++++++++++++++++++++++++++-
 1 file changed, 59 insertions(+), 1 deletion(-)

diff --git a/radar-g/src/widgets/render/imp.rs b/radar-g/src/widgets/render/imp.rs
index 7b4057f..6e1b412 100644
--- a/radar-g/src/widgets/render/imp.rs
+++ b/radar-g/src/widgets/render/imp.rs
@@ -15,6 +15,7 @@ use gtk::subclass::prelude::*;
 use slippy_map_tiles::Tile;
 use std::cell::{Cell, RefCell};
 use std::collections::HashMap;
+use std::ffi::CStr;
 use std::num::NonZeroU32;
 use std::rc::Rc;
 use std::sync::{Arc, Mutex};
@@ -203,7 +204,30 @@ impl Render {
                 static LOAD_FN: fn(&str) -> *const std::ffi::c_void =
                     |s| epoxy::get_proc_addr(s) as *const _;
                 use femtovg::renderer::OpenGl;
-                let ctx = glow::Context::from_loader_function(LOAD_FN);
+                let mut ctx = glow::Context::from_loader_function(LOAD_FN);
+
+                let version = unsafe { ctx.get_parameter_string(glow::VERSION) };
+                info!("OpenGL Version: {}", version);
+
+                if ctx.supported_extensions().contains("GL_ARB_debug_output") {
+                    unsafe {
+                        ctx.debug_message_callback(|source, _type, id, severity, message| {
+                            println!(
+                                "GL ARB Debug Message: Source: {:?}, ID: {}, Severity: {:?}, Message: {}",
+                                source,
+                                id,
+                                severity,
+                                message
+                            );
+                        });
+                        ctx.enable(glow::DEBUG_OUTPUT);
+                        ctx.enable(glow::DEBUG_OUTPUT_SYNCHRONOUS);
+                    }
+                } else {
+                    info!("GL_ARB_debug_output not supported");
+                }
+
+                // enable_opengl_debugging(&mut ctx);
 
                 let id =
                     NonZeroU32::new(ctx.get_parameter_i32(glow::DRAW_FRAMEBUFFER_BINDING) as u32)
@@ -273,3 +297,37 @@ impl Render {
         (x, h as f32 - y)
     }
 }
+
+fn gl_debug_output(
+    source: u32,
+    _type: u32,
+    id: u32,
+    severity: u32,
+    _length: i32,
+    message: *const i8,
+    _user_param: *mut std::ffi::c_void,
+) {
+    unsafe {
+        let message = CStr::from_ptr(message);
+        println!(
+            "GL Debug Message: Source: {:?}, ID: {}, Severity: {:?}, Message: {}",
+            source,
+            id,
+            severity,
+            message.to_string_lossy()
+        );
+    }
+}
+
+fn enable_opengl_debugging(gl: &mut glow::Context) {
+    unsafe {
+        gl.enable(glow::DEBUG_OUTPUT);
+        gl.enable(glow::DEBUG_OUTPUT_SYNCHRONOUS); // 确保错误信息立即显示
+        gl.debug_message_callback(|source, _type, id, severity, message| {
+            println!(
+                "GL Debug Message: Source: {:?}, ID: {}, Severity: {:?}, Message: {}",
+                source, id, severity, message
+            );
+        });
+    }
+}