1 files changed, 20 insertions, 0 deletions
diff --git a/indra/llrender/llrender.cpp b/indra/llrender/llrender.cpp
index 92d8e6193f..a03a27cf94 100644
--- a/indra/llrender/llrender.cpp
+++ b/indra/llrender/llrender.cpp
@@ -36,6 +36,17 @@
 #include "lltexture.h"
 #include "llshadermgr.h"
 
+#if LL_WINDOWS
+extern void APIENTRY gl_debug_callback(GLenum source,
+                                GLenum type,
+                                GLuint id,
+                                GLenum severity,
+                                GLsizei length,
+                                const GLchar* message,
+                                GLvoid* userParam)
+;
+#endif
+
 thread_local LLRender gGL;
 
 // Handy copies of last good GL matrices
@@ -860,6 +871,15 @@ LLRender::~LLRender()
 
 void LLRender::init()
 {
+#if LL_WINDOWS
+    if (gGLManager.mHasDebugOutput && gDebugGL)
+    { //setup debug output callback
+        //glDebugMessageControlARB(GL_DONT_CARE, GL_DONT_CARE, GL_DEBUG_SEVERITY_LOW_ARB, 0, NULL, GL_TRUE);
+        glDebugMessageCallbackARB((GLDEBUGPROCARB) gl_debug_callback, NULL);
+        glEnable(GL_DEBUG_OUTPUT_SYNCHRONOUS_ARB);
+    }
+#endif
+
     glPixelStorei(GL_PACK_ALIGNMENT, 1);
     glPixelStorei(GL_UNPACK_ALIGNMENT, 1);