From f47730b92c309092d0a5a95e2d49d7ad53230a97 Mon Sep 17 00:00:00 2001
From: Dave Parks <davep@lindenlab.com>
Date: Mon, 14 Feb 2022 18:07:24 +0000
Subject: SL-16418 Media texture update stall fix.  Make media texture updates
 use LLImageGL thread to update, fix AMD sync issue on ImageGL thread and
 install debug callbacks on LLImageGL thread when debug gl enabled.

---
 indra/llrender/llrender.cpp | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

(limited to 'indra/llrender/llrender.cpp')

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);
 
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