From 1f750cd7b26348aa799b2ebc9a779f670dba5f4f Mon Sep 17 00:00:00 2001
From: numzero <numzer0@yandex.ru>
Date: Mon, 27 Feb 2023 20:31:51 +0300
Subject: [PATCH] Add debug handler

---
 source/Irrlicht/CIrrDeviceSDL.cpp |  1 +
 source/Irrlicht/OpenGL/Driver.cpp | 11 +++++++++++
 source/Irrlicht/OpenGL/Driver.h   |  3 +++
 3 files changed, 15 insertions(+)

diff --git a/source/Irrlicht/CIrrDeviceSDL.cpp b/source/Irrlicht/CIrrDeviceSDL.cpp
index 8a74719e..a5ba6f69 100644
--- a/source/Irrlicht/CIrrDeviceSDL.cpp
+++ b/source/Irrlicht/CIrrDeviceSDL.cpp
@@ -393,6 +393,7 @@ bool CIrrDeviceSDL::createWindow()
 		SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
 		SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 2);
 		SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_COMPATIBILITY);
+		SDL_GL_SetAttribute(SDL_GL_CONTEXT_FLAGS, SDL_GL_CONTEXT_DEBUG_FLAG | SDL_GL_CONTEXT_ROBUST_ACCESS_FLAG);
 		if (CreationParams.Bits == 16) {
 			SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 4);
 			SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 4);
diff --git a/source/Irrlicht/OpenGL/Driver.cpp b/source/Irrlicht/OpenGL/Driver.cpp
index 7c13e7c7..671f338a 100644
--- a/source/Irrlicht/OpenGL/Driver.cpp
+++ b/source/Irrlicht/OpenGL/Driver.cpp
@@ -31,6 +31,16 @@ namespace irr
 namespace video
 {
 
+void APIENTRY COpenGL3Driver::debugCb(GLenum source, GLenum type, GLuint id, GLenum severity, GLsizei length, const GLchar *message, const void *userParam)
+{
+	((COpenGL3Driver *)userParam)->debugCb(source, type, id, severity, length, message);
+}
+
+void COpenGL3Driver::debugCb(GLenum source, GLenum type, GLuint id, GLenum severity, GLsizei length, const GLchar *message)
+{
+	printf("%04x %04x %x %x %.*s\n", source, type, id, severity, length, message);
+}
+
 COpenGL3Driver::COpenGL3Driver(const SIrrlichtCreationParameters& params, io::IFileSystem* io, IContextManager* contextManager) :
 	CNullDriver(io, params.WindowSize), COpenGL3ExtensionHandler(), CacheHandler(0),
 	Params(params), ResetRenderStates(true), LockRenderStateMode(false), AntiAlias(params.AntiAlias),
@@ -52,6 +62,7 @@ COpenGL3Driver::COpenGL3Driver(const SIrrlichtCreationParameters& params, io::IF
 	ExposedData = ContextManager->getContext();
 	ContextManager->activateContext(ExposedData, false);
 	GL.LoadAllProcedures(ContextManager);
+	GL.DebugMessageCallback(debugCb, this);
 }
 
 COpenGL3Driver::~COpenGL3Driver()
diff --git a/source/Irrlicht/OpenGL/Driver.h b/source/Irrlicht/OpenGL/Driver.h
index dd2ad89e..4920fdea 100644
--- a/source/Irrlicht/OpenGL/Driver.h
+++ b/source/Irrlicht/OpenGL/Driver.h
@@ -397,6 +397,9 @@ private:
 		ECOLOR_FORMAT ColorFormat;
 
 		IContextManager* ContextManager;
+
+		void debugCb(GLenum source, GLenum type, GLuint id, GLenum severity, GLsizei length, const GLchar *message);
+		static void APIENTRY debugCb(GLenum source, GLenum type, GLuint id, GLenum severity, GLsizei length, const GLchar *message, const void *userParam);
 	};
 
 } // end namespace video