Merging in Davep's code for EXT-7835 which should help ext-8076

5 files changed, 25 insertions, 3 deletions

diff --git a/indra/llrender/llvertexbuffer.cpp b/indra/llrender/llvertexbuffer.cpp
index bf5eda21eb..8ac51ee581 100644
--- a/indra/llrender/llvertexbuffer.cpp
+++ b/indra/llrender/llvertexbuffer.cpp
@@ -61,6 +61,7 @@ BOOL LLVertexBuffer::sVBOActive = FALSE;
 BOOL LLVertexBuffer::sIBOActive = FALSE;
 U32 LLVertexBuffer::sAllocatedBytes = 0;
 BOOL LLVertexBuffer::sMapped = FALSE;
+BOOL LLVertexBuffer::sUseStreamDraw = TRUE;
 
 std::vector<U32> LLVertexBuffer::sDeleteList;
 
@@ -382,6 +383,11 @@ LLVertexBuffer::LLVertexBuffer(U32 typemask, S32 usage) :
 		mUsage = 0 ; 
 	}
 	
+	if (mUsage == GL_STREAM_DRAW_ARB && !sUseStreamDraw)
+	{
+		mUsage = 0;
+	}
+
 	S32 stride = calcStride(typemask, mOffsets);
 
 	mTypeMask = typemask;
@@ -813,7 +819,7 @@ BOOL LLVertexBuffer::useVBOs() const
 		return FALSE;
 	}
 #endif
-	return sEnableVBOs;
+	return TRUE;
 }
 
 //----------------------------------------------------------------------------
@@ -1177,7 +1183,7 @@ void LLVertexBuffer::setBuffer(U32 data_mask)
 	{		
 		if (mGLBuffer)
 		{
-			if (sEnableVBOs && sVBOActive)
+			if (sVBOActive)
 			{
 				glBindBufferARB(GL_ARRAY_BUFFER_ARB, 0);
 				sBindCount++;
@@ -1189,7 +1195,7 @@ void LLVertexBuffer::setBuffer(U32 data_mask)
 				setup = TRUE; // ... or a client memory pointer changed
 			}
 		}
-		if (sEnableVBOs && mGLIndices && sIBOActive)
+		if (mGLIndices && sIBOActive)
 		{
 			/*if (sMapped)
 			{
diff --git a/indra/llrender/llvertexbuffer.h b/indra/llrender/llvertexbuffer.h
index b785a22976..ef0bdb21b4 100644
--- a/indra/llrender/llvertexbuffer.h
+++ b/indra/llrender/llvertexbuffer.h
@@ -84,6 +84,8 @@ public:
 	static LLVBOPool sStreamIBOPool;
 	static LLVBOPool sDynamicIBOPool;
 
+	static BOOL	sUseStreamDraw;
+
 	static void initClass(bool use_vbo);
 	static void cleanupClass();
 	static void setupClientArrays(U32 data_mask);
diff --git a/indra/newview/app_settings/settings.xml b/indra/newview/app_settings/settings.xml
index 1eb3732e65..b493f38d76 100644
--- a/indra/newview/app_settings/settings.xml
+++ b/indra/newview/app_settings/settings.xml
@@ -8184,6 +8184,17 @@
       <key>Value</key>
       <integer>1</integer>
     </map>
+  <key>RenderUseStreamVBO</key>
+  <map>
+    <key>Comment</key>
+    <string>Use VBO's for stream buffers</string>
+    <key>Persist</key>
+    <integer>1</integer>
+    <key>Type</key>
+    <string>Boolean</string>
+    <key>Value</key>
+    <integer>1</integer>
+  </map>
     <key>RenderVolumeLODFactor</key>
     <map>
       <key>Comment</key>
diff --git a/indra/newview/llviewercontrol.cpp b/indra/newview/llviewercontrol.cpp
index f2c9fbf78d..c93df6824e 100644
--- a/indra/newview/llviewercontrol.cpp
+++ b/indra/newview/llviewercontrol.cpp
@@ -559,6 +559,7 @@ void settings_setup_listeners()
 	gSavedSettings.getControl("MuteAmbient")->getSignal()->connect(boost::bind(&handleAudioVolumeChanged, _2));
 	gSavedSettings.getControl("MuteUI")->getSignal()->connect(boost::bind(&handleAudioVolumeChanged, _2));
 	gSavedSettings.getControl("RenderVBOEnable")->getSignal()->connect(boost::bind(&handleRenderUseVBOChanged, _2));
+	gSavedSettings.getControl("RenderUseStreamVBO")->getSignal()->connect(boost::bind(&handleResetVertexBuffersChanged, _2));
 	gSavedSettings.getControl("WLSkyDetail")->getSignal()->connect(boost::bind(&handleWLSkyDetailChanged, _2));
 	gSavedSettings.getControl("RenderLightingDetail")->getSignal()->connect(boost::bind(&handleRenderLightingDetailChanged, _2));
 	gSavedSettings.getControl("NumpadControl")->getSignal()->connect(boost::bind(&handleNumpadControlChanged, _2));
diff --git a/indra/newview/pipeline.cpp b/indra/newview/pipeline.cpp
index ee3a2fc34f..3716a5e9d9 100644
--- a/indra/newview/pipeline.cpp
+++ b/indra/newview/pipeline.cpp
@@ -362,6 +362,7 @@ void LLPipeline::init()
 	sDynamicLOD = gSavedSettings.getBOOL("RenderDynamicLOD");
 	sRenderBump = gSavedSettings.getBOOL("RenderObjectBump");
 	sUseTriStrips = gSavedSettings.getBOOL("RenderUseTriStrips");
+	LLVertexBuffer::sUseStreamDraw = gSavedSettings.getBOOL("RenderUseStreamVBO");
 	sRenderAttachedLights = gSavedSettings.getBOOL("RenderAttachedLights");
 	sRenderAttachedParticles = gSavedSettings.getBOOL("RenderAttachedParticles");
 
@@ -5366,6 +5367,7 @@ void LLPipeline::resetVertexBuffers()
 {
 	sRenderBump = gSavedSettings.getBOOL("RenderObjectBump");
 	sUseTriStrips = gSavedSettings.getBOOL("RenderUseTriStrips");
+	LLVertexBuffer::sUseStreamDraw = gSavedSettings.getBOOL("RenderUseStreamVBO");
 
 	for (LLWorld::region_list_t::const_iterator iter = LLWorld::getInstance()->getRegionList().begin(); 
 			iter != LLWorld::getInstance()->getRegionList().end(); ++iter)