5 files changed, 54 insertions, 32 deletions

diff --git a/indra/llrender/llimagegl.cpp b/indra/llrender/llimagegl.cpp
index b9dc689d1a..9dc140b5b9 100644
--- a/indra/llrender/llimagegl.cpp
+++ b/indra/llrender/llimagegl.cpp
@@ -2447,7 +2447,7 @@ void LLImageGLThread::run()
     // We must perform setup on this thread before actually servicing our
     // WorkQueue, likewise cleanup afterwards.
     mWindow->makeContextCurrent(mContext);
-    gGL.init();
+    gGL.init(false);
     ThreadPool::run();
     gGL.shutdown();
     mWindow->destroySharedContext(mContext);
diff --git a/indra/llrender/llrender.cpp b/indra/llrender/llrender.cpp
index a03a27cf94..72cca1f2a2 100644
--- a/indra/llrender/llrender.cpp
+++ b/indra/llrender/llrender.cpp
@@ -869,7 +869,7 @@ LLRender::~LLRender()
 	shutdown();
 }
 
-void LLRender::init()
+void LLRender::init(bool needs_vertex_buffer)
 {
 #if LL_WINDOWS
     if (gGLManager.mHasDebugOutput && gDebugGL)
@@ -897,15 +897,27 @@ void LLRender::init()
 #endif
 	}
 
+    if (needs_vertex_buffer)
+    {
+        initVertexBuffer();
+    }
+}
 
-	llassert_always(mBuffer.isNull()) ;
-	stop_glerror();
-	mBuffer = new LLVertexBuffer(immediate_mask, 0);
-	mBuffer->allocateBuffer(4096, 0, TRUE);
-	mBuffer->getVertexStrider(mVerticesp);
-	mBuffer->getTexCoord0Strider(mTexcoordsp);
-	mBuffer->getColorStrider(mColorsp);
-	stop_glerror();
+void LLRender::initVertexBuffer()
+{
+    llassert_always(mBuffer.isNull());
+    stop_glerror();
+    mBuffer = new LLVertexBuffer(immediate_mask, 0);
+    mBuffer->allocateBuffer(4096, 0, TRUE);
+    mBuffer->getVertexStrider(mVerticesp);
+    mBuffer->getTexCoord0Strider(mTexcoordsp);
+    mBuffer->getColorStrider(mColorsp);
+    stop_glerror();
+}
+
+void LLRender::resetVertexBuffer()
+{
+    mBuffer = NULL;
 }
 
 void LLRender::shutdown()
@@ -923,7 +935,7 @@ void LLRender::shutdown()
 		delete mLightState[i];
 	}
 	mLightState.clear();
-	mBuffer = NULL ;
+    resetVertexBuffer();
 }
 
 void LLRender::refreshState(void)
@@ -1625,25 +1637,34 @@ void LLRender::flush()
 
 		mCount = 0;
 
-		if (mBuffer->useVBOs() && !mBuffer->isLocked())
-		{ //hack to only flush the part of the buffer that was updated (relies on stream draw using buffersubdata)
-			mBuffer->getVertexStrider(mVerticesp, 0, count);
-			mBuffer->getTexCoord0Strider(mTexcoordsp, 0, count);
-			mBuffer->getColorStrider(mColorsp, 0, count);
-		}
-		
-		mBuffer->flush();
-		mBuffer->setBuffer(immediate_mask);
+        if (mBuffer)
+        {
+            if (mBuffer->useVBOs() && !mBuffer->isLocked())
+            { //hack to only flush the part of the buffer that was updated (relies on stream draw using buffersubdata)
+                mBuffer->getVertexStrider(mVerticesp, 0, count);
+                mBuffer->getTexCoord0Strider(mTexcoordsp, 0, count);
+                mBuffer->getColorStrider(mColorsp, 0, count);
+            }
+
+            mBuffer->flush();
+            mBuffer->setBuffer(immediate_mask);
+
+            if (mMode == LLRender::QUADS && sGLCoreProfile)
+            {
+                mBuffer->drawArrays(LLRender::TRIANGLES, 0, count);
+                mQuadCycle = 1;
+            }
+            else
+            {
+                mBuffer->drawArrays(mMode, 0, count);
+            }
+        }
+        else
+        {
+            // mBuffer is present in main thread and not present in an image thread
+            LL_ERRS() << "A flush call from outside main rendering thread" << LL_ENDL;
+        }
 
-		if (mMode == LLRender::QUADS && sGLCoreProfile)
-		{
-			mBuffer->drawArrays(LLRender::TRIANGLES, 0, count);
-			mQuadCycle = 1;
-		}
-		else
-		{
-			mBuffer->drawArrays(mMode, 0, count);
-		}
 		
 		mVerticesp[0] = mVerticesp[count];
 		mTexcoordsp[0] = mTexcoordsp[count];
diff --git a/indra/llrender/llrender.h b/indra/llrender/llrender.h
index e2489876e4..9c36c230fb 100644
--- a/indra/llrender/llrender.h
+++ b/indra/llrender/llrender.h
@@ -354,7 +354,9 @@ public:
 
 	LLRender();
 	~LLRender();
-	void init() ;
+    void init(bool needs_vertex_buffer);
+    void initVertexBuffer();
+    void resetVertexBuffer();
 	void shutdown();
 	
 	// Refreshes renderer state to the cached values
diff --git a/indra/llrender/llvertexbuffer.cpp b/indra/llrender/llvertexbuffer.cpp
index 6338cab96a..be3e6ddff0 100644
--- a/indra/llrender/llvertexbuffer.cpp
+++ b/indra/llrender/llvertexbuffer.cpp
@@ -1055,7 +1055,7 @@ void LLVertexBuffer::releaseIndices()
 
 bool LLVertexBuffer::createGLBuffer(U32 size)
 {
-	if (mGLBuffer)
+	if (mGLBuffer || mMappedData)
 	{
 		destroyGLBuffer();
 	}
diff --git a/indra/llrender/llvertexbuffer.h b/indra/llrender/llvertexbuffer.h
index baf8407fc6..3b3fe44984 100644
--- a/indra/llrender/llvertexbuffer.h
+++ b/indra/llrender/llvertexbuffer.h
@@ -265,7 +265,6 @@ public:
 	bool getTangentStrider(LLStrider<LLVector3>& strider, S32 index=0, S32 count = -1, bool map_range = false);
 	bool getTangentStrider(LLStrider<LLVector4a>& strider, S32 index=0, S32 count = -1, bool map_range = false);
 	bool getColorStrider(LLStrider<LLColor4U>& strider, S32 index=0, S32 count = -1, bool map_range = false);
-	bool getTextureIndexStrider(LLStrider<LLColor4U>& strider, S32 index=0, S32 count = -1, bool map_range = false);
 	bool getEmissiveStrider(LLStrider<LLColor4U>& strider, S32 index=0, S32 count = -1, bool map_range = false);
 	bool getWeightStrider(LLStrider<F32>& strider, S32 index=0, S32 count = -1, bool map_range = false);
 	bool getWeight4Strider(LLStrider<LLVector4>& strider, S32 index=0, S32 count = -1, bool map_range = false);