SL-16386 remove references to (const true) LLGLSLShader::sNoFixedFunction

27 files changed, 155 insertions, 626 deletions

diff --git a/indra/newview/lldrawpoolavatar.cpp b/indra/newview/lldrawpoolavatar.cpp
index 125cd3fd5b..f9fdbac9ab 100644
--- a/indra/newview/lldrawpoolavatar.cpp
+++ b/indra/newview/lldrawpoolavatar.cpp
@@ -497,11 +497,8 @@ void LLDrawPoolAvatar::beginImpostor()
 		LLVOAvatar::sNumVisibleAvatars = 0;
 	}
 
-	if (LLGLSLShader::sNoFixedFunction)
-	{
-		gImpostorProgram.bind();
-		gImpostorProgram.setMinimumAlpha(0.01f);
-	}
+	gImpostorProgram.bind();
+	gImpostorProgram.setMinimumAlpha(0.01f);
 
 	gPipeline.enableLightsFullbright();
 	sDiffuseChannel = 0;
@@ -511,10 +508,7 @@ void LLDrawPoolAvatar::endImpostor()
 {
     LL_PROFILE_ZONE_SCOPED
 
-	if (LLGLSLShader::sNoFixedFunction)
-	{
-		gImpostorProgram.unbind();
-	}
+	gImpostorProgram.unbind();
 	gPipeline.enableLightsDynamic();
 }
 
@@ -686,10 +680,7 @@ void LLDrawPoolAvatar::beginSkinned()
 		}
 	}
 
-	if (LLGLSLShader::sNoFixedFunction)
-	{
-		sVertexProgram->setMinimumAlpha(LLDrawPoolAvatar::sMinimumAlpha);
-	}
+	sVertexProgram->setMinimumAlpha(LLDrawPoolAvatar::sMinimumAlpha);
 }
 
 void LLDrawPoolAvatar::endSkinned()
diff --git a/indra/newview/lldrawpoolbump.cpp b/indra/newview/lldrawpoolbump.cpp
index af8b194f38..2d26ee9f65 100644
--- a/indra/newview/lldrawpoolbump.cpp
+++ b/indra/newview/lldrawpoolbump.cpp
@@ -745,23 +745,9 @@ void LLDrawPoolBump::renderBump(U32 pass)
 //static
 void LLDrawPoolBump::endBump(U32 pass)
 {
-	if (LLGLSLShader::sNoFixedFunction)
-	{
-		gObjectBumpProgram.unbind();
-	}
-	else
-	{
-		// Disable texture blending on unit 1
-		gGL.getTexUnit(1)->activate();
-		gGL.getTexUnit(1)->disable();
-		gGL.getTexUnit(1)->setTextureBlendType(LLTexUnit::TB_MULT);
+    gObjectBumpProgram.unbind();
 
-		// Disable texture blending on unit 0
-		gGL.getTexUnit(0)->activate();
-		gGL.getTexUnit(0)->setTextureBlendType(LLTexUnit::TB_MULT);
-	}
-	
-	gGL.setSceneBlendType(LLRender::BT_ALPHA);
+    gGL.setSceneBlendType(LLRender::BT_ALPHA);
 }
 
 S32 LLDrawPoolBump::getNumDeferredPasses()
diff --git a/indra/newview/lldrawpoolsky.cpp b/indra/newview/lldrawpoolsky.cpp
index b1eefaab81..3a1efec91b 100644
--- a/indra/newview/lldrawpoolsky.cpp
+++ b/indra/newview/lldrawpoolsky.cpp
@@ -76,16 +76,8 @@ void LLDrawPoolSky::render(S32 pass)
 	}
 
 
-	if (LLGLSLShader::sNoFixedFunction)
-	{ //just use the UI shader (generic single texture no lighting)
-		gOneTextureNoColorProgram.bind();
-	}
-	else
-	{
-		LLGLSLShader::bindNoShader();
-		mShader = NULL;
-	}
-	
+    //just use the UI shader (generic single texture no lighting)
+	gOneTextureNoColorProgram.bind();
 
 	LLGLSPipelineDepthTestSkyBox gls_skybox(true, false);
 
diff --git a/indra/newview/lldrawpoolterrain.cpp b/indra/newview/lldrawpoolterrain.cpp
index 9cea8f5460..c71ebaffb9 100644
--- a/indra/newview/lldrawpoolterrain.cpp
+++ b/indra/newview/lldrawpoolterrain.cpp
@@ -837,20 +837,8 @@ void LLDrawPoolTerrain::renderSimple()
 	tp0.setVec(tscale, 0.f, 0.0f, -1.f*(origin_agent.mV[0]/256.f));
 	tp1.setVec(0.f, tscale, 0.0f, -1.f*(origin_agent.mV[1]/256.f));
 	
-	if (LLGLSLShader::sNoFixedFunction)
-	{
-		sShader->uniform4fv(LLShaderMgr::OBJECT_PLANE_S, 1, tp0.mV);
-		sShader->uniform4fv(LLShaderMgr::OBJECT_PLANE_T, 1, tp1.mV);
-	}
-	else
-	{
-		glEnable(GL_TEXTURE_GEN_S);
-		glEnable(GL_TEXTURE_GEN_T);
-		glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR);
-		glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR);
-		glTexGenfv(GL_S, GL_OBJECT_PLANE, tp0.mV);
-		glTexGenfv(GL_T, GL_OBJECT_PLANE, tp1.mV);
-	}
+	sShader->uniform4fv(LLShaderMgr::OBJECT_PLANE_S, 1, tp0.mV);
+	sShader->uniform4fv(LLShaderMgr::OBJECT_PLANE_T, 1, tp1.mV);
 
 	gGL.getTexUnit(0)->setTextureColorBlend(LLTexUnit::TBO_MULT, LLTexUnit::TBS_TEX_COLOR, LLTexUnit::TBS_VERT_COLOR);
 
@@ -861,11 +849,6 @@ void LLDrawPoolTerrain::renderSimple()
 	
 	gGL.getTexUnit(0)->activate();
 	gGL.getTexUnit(0)->unbind(LLTexUnit::TT_TEXTURE);
-	if (!LLGLSLShader::sNoFixedFunction)
-	{
-		glDisable(GL_TEXTURE_GEN_S);
-		glDisable(GL_TEXTURE_GEN_T);
-	}
 	gGL.matrixMode(LLRender::MM_TEXTURE);
 	gGL.loadIdentity();
 	gGL.matrixMode(LLRender::MM_MODELVIEW);
diff --git a/indra/newview/lldrawpooltree.cpp b/indra/newview/lldrawpooltree.cpp
index 202f648e3f..e93852864e 100644
--- a/indra/newview/lldrawpooltree.cpp
+++ b/indra/newview/lldrawpooltree.cpp
@@ -90,7 +90,7 @@ void LLDrawPoolTree::render(S32 pass)
 		return;
 	}
 
-	LLGLState test(GL_ALPHA_TEST, LLGLSLShader::sNoFixedFunction ? 0 : 1);
+	LLGLState test(GL_ALPHA_TEST, 0);
 
 	gGL.getTexUnit(sDiffTex)->bind(mTexturep);
 				
diff --git a/indra/newview/lldrawpoolwater.cpp b/indra/newview/lldrawpoolwater.cpp
index e2d3f67e46..c0e82ead43 100644
--- a/indra/newview/lldrawpoolwater.cpp
+++ b/indra/newview/lldrawpoolwater.cpp
@@ -352,19 +352,16 @@ void LLDrawPoolWater::renderOpaqueLegacyWater()
     }
 
 	LLGLSLShader* shader = NULL;
-	if (LLGLSLShader::sNoFixedFunction)
+	if (LLPipeline::sUnderWaterRender)
 	{
-		if (LLPipeline::sUnderWaterRender)
-		{
-			shader = &gObjectSimpleNonIndexedTexGenWaterProgram;
-		}
-		else
-		{
-			shader = &gObjectSimpleNonIndexedTexGenProgram;
-		}
-
-		shader->bind();
+		shader = &gObjectSimpleNonIndexedTexGenWaterProgram;
 	}
+	else
+	{
+		shader = &gObjectSimpleNonIndexedTexGenProgram;
+	}
+
+	shader->bind();
 
 	stop_glerror();
 
diff --git a/indra/newview/lldrawpoolwlsky.cpp b/indra/newview/lldrawpoolwlsky.cpp
index 8c8dc3f3d2..44b12ceaca 100644
--- a/indra/newview/lldrawpoolwlsky.cpp
+++ b/indra/newview/lldrawpoolwlsky.cpp
@@ -266,33 +266,14 @@ void LLDrawPoolWLSky::renderStars(const LLVector3& camPosLocal) const
 	gGL.pushMatrix();
 	gGL.translatef(camPosLocal.mV[0], camPosLocal.mV[1], camPosLocal.mV[2]);
 	gGL.rotatef(gFrameTimeSeconds*0.01f, 0.f, 0.f, 1.f);
-	if (LLGLSLShader::sNoFixedFunction)
-	{
-		gCustomAlphaProgram.bind();
-		gCustomAlphaProgram.uniform1f(sCustomAlpha, star_alpha.mV[3]);
-	}
-	else
-	{
-		gGL.getTexUnit(0)->setTextureColorBlend(LLTexUnit::TBO_MULT, LLTexUnit::TBS_TEX_COLOR, LLTexUnit::TBS_VERT_COLOR);
-		gGL.getTexUnit(0)->setTextureAlphaBlend(LLTexUnit::TBO_MULT_X2, LLTexUnit::TBS_CONST_ALPHA, LLTexUnit::TBS_TEX_ALPHA);
-		glTexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, star_alpha.mV);
-	}
+	gCustomAlphaProgram.bind();
+	gCustomAlphaProgram.uniform1f(sCustomAlpha, star_alpha.mV[3]);
 
 	gSky.mVOWLSkyp->drawStars();
 
     gGL.getTexUnit(0)->unbind(LLTexUnit::TT_TEXTURE);
-
 	gGL.popMatrix();
-
-	if (LLGLSLShader::sNoFixedFunction)
-	{
-		gCustomAlphaProgram.unbind();
-	}
-	else
-	{
-		// and disable the combiner states
-		gGL.getTexUnit(0)->setTextureBlendType(LLTexUnit::TB_MULT);
-	}
+	gCustomAlphaProgram.unbind();
 }
 
 void LLDrawPoolWLSky::renderStarsDeferred(const LLVector3& camPosLocal) const
diff --git a/indra/newview/llfloaterbvhpreview.cpp b/indra/newview/llfloaterbvhpreview.cpp
index 131d9b077b..4f0d8b8eb0 100644
--- a/indra/newview/llfloaterbvhpreview.cpp
+++ b/indra/newview/llfloaterbvhpreview.cpp
@@ -1088,10 +1088,7 @@ BOOL	LLPreviewAnimation::render()
 	gGL.pushMatrix();
 	gGL.loadIdentity();
 
-	if (LLGLSLShader::sNoFixedFunction)
-	{
-		gUIProgram.bind();
-	}
+	gUIProgram.bind();
 
 	LLGLSUIDefault def;
 	gGL.getTexUnit(0)->unbind(LLTexUnit::TT_TEXTURE);
diff --git a/indra/newview/llfloaterimagepreview.cpp b/indra/newview/llfloaterimagepreview.cpp
index 028c922a4d..89ba687d25 100644
--- a/indra/newview/llfloaterimagepreview.cpp
+++ b/indra/newview/llfloaterimagepreview.cpp
@@ -664,10 +664,7 @@ BOOL LLImagePreviewAvatar::render()
 	LLGLSUIDefault def;
 	gGL.color4f(0.15f, 0.2f, 0.3f, 1.f);
 
-	if (LLGLSLShader::sNoFixedFunction)
-	{
-		gUIProgram.bind();
-	}
+	gUIProgram.bind();
 
 	gl_rect_2d_simple( mFullWidth, mFullHeight );
 
@@ -866,10 +863,7 @@ BOOL LLImagePreviewSculpted::render()
 		
 	gGL.color4f(0.15f, 0.2f, 0.3f, 1.f);
 
-	if (LLGLSLShader::sNoFixedFunction)
-	{
-		gUIProgram.bind();
-	}
+	gUIProgram.bind();
 
 	gl_rect_2d_simple( mFullWidth, mFullHeight );
 	
@@ -903,10 +897,7 @@ BOOL LLImagePreviewSculpted::render()
 	
 	gPipeline.enableLightsAvatar();
 
-	if (LLGLSLShader::sNoFixedFunction)
-	{
-		gObjectPreviewProgram.bind();
-	}
+	gObjectPreviewProgram.bind();
 	gPipeline.enableLightsPreview();
 
 	gGL.pushMatrix();
@@ -920,10 +911,7 @@ BOOL LLImagePreviewSculpted::render()
 
 	gGL.popMatrix();
 
-	if (LLGLSLShader::sNoFixedFunction)
-	{
-		gObjectPreviewProgram.unbind();
-	}
+	gObjectPreviewProgram.unbind();
 
 	return TRUE;
 }
diff --git a/indra/newview/llglsandbox.cpp b/indra/newview/llglsandbox.cpp
index 91f314c115..a135ef0814 100644
--- a/indra/newview/llglsandbox.cpp
+++ b/indra/newview/llglsandbox.cpp
@@ -791,10 +791,7 @@ void LLViewerObjectList::renderObjectBeacons()
 
 	LLGLSUIDefault gls_ui;
 
-	if (LLGLSLShader::sNoFixedFunction)
-	{
-		gUIProgram.bind();
-	}
+	gUIProgram.bind();
 
 	{
 		gGL.getTexUnit(0)->unbind(LLTexUnit::TT_TEXTURE);
@@ -882,10 +879,7 @@ void LLViewerObjectList::renderObjectBeacons()
 void LLSky::renderSunMoonBeacons(const LLVector3& pos_agent, const LLVector3& direction, LLColor4 color)
 {
 	LLGLSUIDefault gls_ui;
-	if (LLGLSLShader::sNoFixedFunction)
-	{
-		gUIProgram.bind();
-	}
+	gUIProgram.bind();
 	gGL.getTexUnit(0)->unbind(LLTexUnit::TT_TEXTURE);
 
 	LLVector3 pos_end;
diff --git a/indra/newview/llhudtext.cpp b/indra/newview/llhudtext.cpp
index 7c957ac712..d01d25a75b 100644
--- a/indra/newview/llhudtext.cpp
+++ b/indra/newview/llhudtext.cpp
@@ -573,7 +573,6 @@ void LLHUDText::renderAllHUD()
 {
 	LLGLState::checkStates();
 	LLGLState::checkTextureChannels();
-	LLGLState::checkClientArrays();
 
 	{
 		LLGLEnable color_mat(GL_COLOR_MATERIAL);
@@ -591,7 +590,6 @@ void LLHUDText::renderAllHUD()
 
 	LLGLState::checkStates();
 	LLGLState::checkTextureChannels();
-	LLGLState::checkClientArrays();
 }
 
 void LLHUDText::shiftAll(const LLVector3& offset)
diff --git a/indra/newview/lllegacyatmospherics.cpp b/indra/newview/lllegacyatmospherics.cpp
index 238e9fe0e1..1364067949 100644
--- a/indra/newview/lllegacyatmospherics.cpp
+++ b/indra/newview/lllegacyatmospherics.cpp
@@ -383,12 +383,6 @@ void LLAtmospherics::updateFog(const F32 distance, const LLVector3& tosun_in)
 
 	if (!gPipeline.hasRenderDebugFeatureMask(LLPipeline::RENDER_DEBUG_FEATURE_FOG))
 	{
-		if (!LLGLSLShader::sNoFixedFunction)
-		{
-			glFogf(GL_FOG_DENSITY, 0);
-			glFogfv(GL_FOG_COLOR, (F32 *) &LLColor4::white.mV);
-			glFogf(GL_FOG_END, 1000000.f);
-		}
 		return;
 	}
 
@@ -484,10 +478,6 @@ void LLAtmospherics::updateFog(const F32 distance, const LLVector3& tosun_in)
 	if (camera_height > water_height)
 	{
 		LLColor4 fog(render_fog_color);
-		if (!LLGLSLShader::sNoFixedFunction)
-		{
-			glFogfv(GL_FOG_COLOR, fog.mV);
-		}
 		mGLFogCol = fog;
 
 		if (hide_clip_plane)
@@ -495,19 +485,11 @@ void LLAtmospherics::updateFog(const F32 distance, const LLVector3& tosun_in)
 			// For now, set the density to extend to the cull distance.
 			const F32 f_log = 2.14596602628934723963618357029f; // sqrt(fabs(log(0.01f)))
 			fog_density = f_log/fog_distance;
-			if (!LLGLSLShader::sNoFixedFunction)
-			{
-				glFogi(GL_FOG_MODE, GL_EXP2);
-			}
 		}
 		else
 		{
 			const F32 f_log = 4.6051701859880913680359829093687f; // fabs(log(0.01f))
 			fog_density = (f_log)/fog_distance;
-			if (!LLGLSLShader::sNoFixedFunction)
-			{
-				glFogi(GL_FOG_MODE, GL_EXP);
-			}
 		}
 	}
 	else
@@ -533,12 +515,6 @@ void LLAtmospherics::updateFog(const F32 distance, const LLVector3& tosun_in)
 
 		// set the density based on what the shaders use
 		fog_density = water_fog_density * gSavedSettings.getF32("WaterGLFogDensityScale");
-
-		if (!LLGLSLShader::sNoFixedFunction)
-		{
-			glFogfv(GL_FOG_COLOR, (F32 *) &fogCol.mV);
-			glFogi(GL_FOG_MODE, GL_EXP2);
-		}
 	}
 
 	mFogColor = sky_fog_color;
@@ -546,13 +522,6 @@ void LLAtmospherics::updateFog(const F32 distance, const LLVector3& tosun_in)
 
 	LLDrawPoolWater::sWaterFogEnd = fog_distance*2.2f;
 
-	if (!LLGLSLShader::sNoFixedFunction)
-	{
-		LLGLSFog gls_fog;
-		glFogf(GL_FOG_END, fog_distance*2.2f);
-		glFogf(GL_FOG_DENSITY, fog_density);
-		glHint(GL_FOG_HINT, GL_NICEST);
-	}
 	stop_glerror();
 }
 
diff --git a/indra/newview/llmaniprotate.cpp b/indra/newview/llmaniprotate.cpp
index 7c942e8b53..452762b09d 100644
--- a/indra/newview/llmaniprotate.cpp
+++ b/indra/newview/llmaniprotate.cpp
@@ -157,10 +157,7 @@ void LLManipRotate::render()
 		}
 		else
 		{
-			if (LLGLSLShader::sNoFixedFunction)
-			{
-				gDebugProgram.bind();
-			}
+			gDebugProgram.bind();
 
 			LLGLEnable cull_face(GL_CULL_FACE);
 			LLGLDepthTest gls_depth(GL_FALSE);
@@ -213,10 +210,7 @@ void LLManipRotate::render()
 			}
 			gGL.popMatrix();
 
-			if (LLGLSLShader::sNoFixedFunction)
-			{
-				gUIProgram.bind();
-			}
+			gUIProgram.bind();
 		}
 		
 		gGL.translatef( center.mV[VX], center.mV[VY], center.mV[VZ] );
@@ -234,10 +228,7 @@ void LLManipRotate::render()
 		gGL.rotatef(angle_radians * RAD_TO_DEG, x, y, z);
 
 
-		if (LLGLSLShader::sNoFixedFunction)
-		{
-			gDebugProgram.bind();
-		}
+		gDebugProgram.bind();
 
 		if (mManipPart == LL_ROT_Z)
 		{
@@ -355,11 +346,7 @@ void LLManipRotate::render()
 			
 		}
 
-		if (LLGLSLShader::sNoFixedFunction)
-		{
-			gUIProgram.bind();
-		}
-		
+		gUIProgram.bind();
 	}
 	gGL.popMatrix();
 	gGL.popMatrix();
diff --git a/indra/newview/llmaniptranslate.cpp b/indra/newview/llmaniptranslate.cpp
index 8736d3b51f..0b2a1ef389 100644
--- a/indra/newview/llmaniptranslate.cpp
+++ b/indra/newview/llmaniptranslate.cpp
@@ -1565,11 +1565,6 @@ void LLManipTranslate::renderSnapGuides()
 					LLGLEnable stipple(GL_LINE_STIPPLE);
 					gGL.flush();
 
-					if (!LLGLSLShader::sNoFixedFunction)
-					{
-						glLineStipple(1, 0x3333);
-					}
-		
 					switch (mManipPart)
 					{
 					  case LL_YZ_PLANE:
@@ -1633,7 +1628,7 @@ void LLManipTranslate::highlightIntersection(LLVector3 normal,
 											 LLQuaternion grid_rotation, 
 											 LLColor4 inner_color)
 {
-	if (!gSavedSettings.getBOOL("GridCrossSections") || !LLGLSLShader::sNoFixedFunction)
+	if (!gSavedSettings.getBOOL("GridCrossSections"))
 	{
 		return;
 	}
diff --git a/indra/newview/llmodelpreview.cpp b/indra/newview/llmodelpreview.cpp
index d7e9e234ca..566a89e24d 100644
--- a/indra/newview/llmodelpreview.cpp
+++ b/indra/newview/llmodelpreview.cpp
@@ -2886,8 +2886,6 @@ BOOL LLModelPreview::render()
     LLMutexLock lock(this);
     mNeedsUpdate = FALSE;
 
-    bool use_shaders = LLGLSLShader::sNoFixedFunction;
-
     bool edges = mViewOption["show_edges"];
     bool joint_overrides = mViewOption["show_joint_overrides"];
     bool joint_positions = mViewOption["show_joint_positions"];
@@ -2905,10 +2903,8 @@ BOOL LLModelPreview::render()
     LLGLDisable fog(GL_FOG);
 
     {
-        if (use_shaders)
-        {
-            gUIProgram.bind();
-        }
+        gUIProgram.bind();
+
         //clear background to grey
         gGL.matrixMode(LLRender::MM_PROJECTION);
         gGL.pushMatrix();
@@ -2927,10 +2923,7 @@ BOOL LLModelPreview::render()
 
         gGL.matrixMode(LLRender::MM_MODELVIEW);
         gGL.popMatrix();
-        if (use_shaders)
-        {
-            gUIProgram.unbind();
-        }
+        gUIProgram.unbind();
     }
 
     LLFloaterModelPreview* fmp = LLFloaterModelPreview::sInstance;
@@ -3083,10 +3076,7 @@ BOOL LLModelPreview::render()
         refresh();
     }
 
-    if (use_shaders)
-    {
-        gObjectPreviewProgram.bind();
-    }
+    gObjectPreviewProgram.bind();
 
     gGL.loadIdentity();
     gPipeline.enableLightsPreview();
@@ -3587,10 +3577,7 @@ BOOL LLModelPreview::render()
         }
     }
 
-    if (use_shaders)
-    {
-        gObjectPreviewProgram.unbind();
-    }
+    gObjectPreviewProgram.unbind();
 
     gGL.popMatrix();
 
diff --git a/indra/newview/llscenemonitor.cpp b/indra/newview/llscenemonitor.cpp
index 177bc84cee..2e44dc1459 100644
--- a/indra/newview/llscenemonitor.cpp
+++ b/indra/newview/llscenemonitor.cpp
@@ -271,7 +271,7 @@ void LLSceneMonitor::capture()
 	static LLCachedControl<F32>  scene_load_sample_time(gSavedSettings, "SceneLoadingMonitorSampleTime");
 	static bool force_capture = true;
 
-	bool enabled = LLGLSLShader::sNoFixedFunction && (monitor_enabled || mDebugViewerVisible);
+	bool enabled = monitor_enabled || mDebugViewerVisible;
 	if(mEnabled != enabled)
 	{
 		if(mEnabled)
@@ -719,13 +719,6 @@ void LLSceneMonitorView::onTeleportFinished()
 
 void LLSceneMonitorView::onVisibilityChange(BOOL visible)
 {
-	if (!LLGLSLShader::sNoFixedFunction && visible)
-	{
-		visible = false;
-		// keep Scene monitor and its view in sycn
-		setVisible(false);
-		LL_WARNS("SceneMonitor") << "Incompatible graphical settings, Scene Monitor can't be turned on" << LL_ENDL; 
-	}
 	LLSceneMonitor::getInstance()->setDebugViewerVisible(visible);
 }
 
diff --git a/indra/newview/llspatialpartition.cpp b/indra/newview/llspatialpartition.cpp
index 332fa73944..25d6106361 100644
--- a/indra/newview/llspatialpartition.cpp
+++ b/indra/newview/llspatialpartition.cpp
@@ -2612,7 +2612,7 @@ void renderPhysicsShape(LLDrawable* drawable, LLVOVolume* volume)
 				gGL.diffuseColor4fv(line_color.mV);
 				LLVertexBuffer::unbind();
 
-				llassert(!LLGLSLShader::sNoFixedFunction || LLGLSLShader::sCurBoundShader != 0);
+				llassert(LLGLSLShader::sCurBoundShader != 0);
 				
                 LLVertexBuffer::drawElements(LLRender::TRIANGLES, phys_volume->mHullPoints, NULL, phys_volume->mNumHullIndices, phys_volume->mHullIndices);
 				
@@ -2694,7 +2694,7 @@ void renderPhysicsShape(LLDrawable* drawable, LLVOVolume* volume)
 		if (phys_volume->mHullPoints && phys_volume->mHullIndices)
 		{
 			glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
-			llassert(!LLGLSLShader::sNoFixedFunction || LLGLSLShader::sCurBoundShader != 0);
+			llassert(LLGLSLShader::sCurBoundShader != 0);
 			LLVertexBuffer::unbind();
 			glVertexPointer(3, GL_FLOAT, 16, phys_volume->mHullPoints);
 			gGL.diffuseColor4fv(line_color.mV);
@@ -3796,10 +3796,7 @@ void LLSpatialPartition::renderDebug()
 		return;
 	}
 	
-	if (LLGLSLShader::sNoFixedFunction)
-	{
-		gDebugProgram.bind();
-	}
+	gDebugProgram.bind();
 
 	if (gPipeline.hasRenderDebugMask(LLPipeline::RENDER_DEBUG_TEXTURE_PRIORITY))
 	{
@@ -3848,10 +3845,7 @@ void LLSpatialPartition::renderDebug()
 			glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
 		}
 	}
-	if (LLGLSLShader::sNoFixedFunction)
-	{
-		gDebugProgram.unbind();
-	}
+	gDebugProgram.unbind();
 }
 
 void LLSpatialGroup::drawObjectBox(LLColor4 col)
diff --git a/indra/newview/lltoolmorph.cpp b/indra/newview/lltoolmorph.cpp
index 06a2caf75b..9f0198029a 100644
--- a/indra/newview/lltoolmorph.cpp
+++ b/indra/newview/lltoolmorph.cpp
@@ -195,10 +195,7 @@ BOOL LLVisualParamHint::render()
 	gGL.pushMatrix();
 	gGL.loadIdentity();
 
-	if (LLGLSLShader::sNoFixedFunction)
-	{
-		gUIProgram.bind();
-	}
+	gUIProgram.bind();
 
 	LLGLSUIDefault gls_ui;
 	//LLGLState::verify(TRUE);
diff --git a/indra/newview/llviewercontrol.cpp b/indra/newview/llviewercontrol.cpp
index 3c6c9c905a..19b25a01fe 100644
--- a/indra/newview/llviewercontrol.cpp
+++ b/indra/newview/llviewercontrol.cpp
@@ -388,7 +388,7 @@ static bool handleJoystickChanged(const LLSD& newvalue)
 
 static bool handleUseOcclusionChanged(const LLSD& newvalue)
 {
-	LLPipeline::sUseOcclusion = (newvalue.asBoolean() && gGLManager.mHasOcclusionQuery && LLGLSLShader::sNoFixedFunction
+	LLPipeline::sUseOcclusion = (newvalue.asBoolean() && gGLManager.mHasOcclusionQuery
 		&& LLFeatureManager::getInstance()->isFeatureAvailable("UseOcclusion") && !gUseWireframe) ? 2 : 0;
 	return true;
 }
diff --git a/indra/newview/llviewerdisplay.cpp b/indra/newview/llviewerdisplay.cpp
index 38ac4275cf..60ba07d3af 100644
--- a/indra/newview/llviewerdisplay.cpp
+++ b/indra/newview/llviewerdisplay.cpp
@@ -717,7 +717,6 @@ void display(BOOL rebuild, F32 zoom_factor, int subfield, BOOL for_snapshot)
 
 		LLGLState::checkStates();
 		LLGLState::checkTextureChannels();
-		LLGLState::checkClientArrays();
 
 		static LLCullResult result;
 		LLViewerCamera::sCurCameraID = LLViewerCamera::CAMERA_WORLD;
@@ -727,8 +726,7 @@ void display(BOOL rebuild, F32 zoom_factor, int subfield, BOOL for_snapshot)
 
 		LLGLState::checkStates();
 		LLGLState::checkTextureChannels();
-		LLGLState::checkClientArrays();
-
+		
 		LLAppViewer::instance()->pingMainloopTimeout("Display:Swap");
 		
 		{ 
@@ -744,7 +742,6 @@ void display(BOOL rebuild, F32 zoom_factor, int subfield, BOOL for_snapshot)
 
 			LLGLState::checkStates();
 			LLGLState::checkTextureChannels();
-			LLGLState::checkClientArrays();
 
 			if (!for_snapshot)
 			{
@@ -758,7 +755,6 @@ void display(BOOL rebuild, F32 zoom_factor, int subfield, BOOL for_snapshot)
 
 				LLGLState::checkStates();
 				LLGLState::checkTextureChannels();
-				LLGLState::checkClientArrays();
 
 				glh::matrix4f proj = get_current_projection();
 				glh::matrix4f mod = get_current_modelview();
@@ -777,14 +773,12 @@ void display(BOOL rebuild, F32 zoom_factor, int subfield, BOOL for_snapshot)
 
 				LLGLState::checkStates();
 				LLGLState::checkTextureChannels();
-				LLGLState::checkClientArrays();
 
 			}
 			glClear(GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
 		}
 
 		LLGLState::checkStates();
-		LLGLState::checkClientArrays();
 
 		//if (!for_snapshot)
 		{
@@ -796,7 +790,6 @@ void display(BOOL rebuild, F32 zoom_factor, int subfield, BOOL for_snapshot)
 		}
 
 		LLGLState::checkStates();
-		LLGLState::checkClientArrays();
 
 		//////////////////////////////////////
 		//
@@ -836,7 +829,6 @@ void display(BOOL rebuild, F32 zoom_factor, int subfield, BOOL for_snapshot)
 		}
 
 		LLGLState::checkStates();
-		LLGLState::checkClientArrays();
 
 		///////////////////////////////////
 		//
@@ -868,7 +860,6 @@ void display(BOOL rebuild, F32 zoom_factor, int subfield, BOOL for_snapshot)
 		LLSceneMonitor::getInstance()->fetchQueryResult();
 		
 		LLGLState::checkStates();
-		LLGLState::checkClientArrays();
 
 		LLPipeline::sUseOcclusion = occlusion;
 
@@ -927,7 +918,6 @@ void display(BOOL rebuild, F32 zoom_factor, int subfield, BOOL for_snapshot)
 		LLPipeline::sUnderWaterRender = LLViewerCamera::getInstance()->cameraUnderWater() ? TRUE : FALSE;
 
 		LLGLState::checkStates();
-		LLGLState::checkClientArrays();
 
 		stop_glerror();
 
@@ -960,7 +950,7 @@ void display(BOOL rebuild, F32 zoom_factor, int subfield, BOOL for_snapshot)
 			LL_PROFILE_ZONE_NAMED("display - 4")
 			LLViewerCamera::sCurCameraID = LLViewerCamera::CAMERA_WORLD;
 
-			if (gSavedSettings.getBOOL("RenderDepthPrePass") && LLGLSLShader::sNoFixedFunction)
+			if (gSavedSettings.getBOOL("RenderDepthPrePass"))
 			{
 				gGL.setColorMask(false, false);
 
@@ -1450,10 +1440,7 @@ void render_ui_3d()
 
 	stop_glerror();
 	
-	if (LLGLSLShader::sNoFixedFunction)
-	{
-		gUIProgram.bind();
-	}
+	gUIProgram.bind();
 
 	// Coordinate axes
 	if (gSavedSettings.getBOOL("ShowAxes"))
@@ -1583,10 +1570,7 @@ void render_ui_2d()
 
 void render_disconnected_background()
 {
-	if (LLGLSLShader::sNoFixedFunction)
-	{
-		gUIProgram.bind();
-	}
+	gUIProgram.bind();
 
 	gGL.color4f(1,1,1,1);
 	if (!gDisconnectedImagep && gDisconnected)
@@ -1658,11 +1642,7 @@ void render_disconnected_background()
 	}
 	gGL.flush();
 
-	if (LLGLSLShader::sNoFixedFunction)
-	{
-		gUIProgram.unbind();
-	}
-
+	gUIProgram.unbind();
 }
 
 void display_cleanup()
diff --git a/indra/newview/llviewerjointmesh.cpp b/indra/newview/llviewerjointmesh.cpp
index 3e385a46e4..98d8f91116 100644
--- a/indra/newview/llviewerjointmesh.cpp
+++ b/indra/newview/llviewerjointmesh.cpp
@@ -225,7 +225,7 @@ U32 LLViewerJointMesh::drawShape( F32 pixelArea, BOOL first_pass, BOOL is_dummy)
 	if (!mValid || !mMesh || !mFace || !mVisible || 
 		!mFace->getVertexBuffer() ||
 		mMesh->getNumFaces() == 0 ||
-		(LLGLSLShader::sNoFixedFunction && LLGLSLShader::sCurBoundShaderPtr == NULL))
+		LLGLSLShader::sCurBoundShaderPtr == NULL)
 	{
 		return 0;
 	}
@@ -246,7 +246,7 @@ U32 LLViewerJointMesh::drawShape( F32 pixelArea, BOOL first_pass, BOOL is_dummy)
 
 	stop_glerror();
 	
-	LLGLSSpecular specular(LLColor4(1.f,1.f,1.f,1.f), (mFace->getPool()->getShaderLevel() > 0 || LLGLSLShader::sNoFixedFunction) ? 0.f : mShiny);
+	LLGLSSpecular specular(LLColor4(1.f,1.f,1.f,1.f), 0.f);
 
 	//----------------------------------------------------------------
 	// setup current texture
diff --git a/indra/newview/llviewershadermgr.cpp b/indra/newview/llviewershadermgr.cpp
index b626a8ebea..d37678e24f 100644
--- a/indra/newview/llviewershadermgr.cpp
+++ b/indra/newview/llviewershadermgr.cpp
@@ -471,7 +471,6 @@ void LLViewerShaderMgr::setShaders()
     }
     mMaxAvatarShaderLevel = 0;
 
-    LLGLSLShader::sNoFixedFunction = false;
     LLVertexBuffer::unbind();
 
     llassert((gGLManager.mGLSLVersionMajor > 1 || gGLManager.mGLSLVersionMinor >= 10));
@@ -482,9 +481,6 @@ void LLViewerShaderMgr::setShaders()
     bool doingWindLight          = hasWindLightShaders && gSavedSettings.getBOOL("WindLightUseAtmosShaders");
     bool useRenderDeferred       = doingWindLight && canRenderDeferred && gSavedSettings.getBOOL("RenderDeferred");
 
-    //using shaders, disable fixed function
-    LLGLSLShader::sNoFixedFunction = true;
-
     S32 light_class = 3;
     S32 interface_class = 2;
     S32 env_class = 2;
@@ -556,12 +552,12 @@ void LLViewerShaderMgr::setShaders()
     }
     else
     {
-        LL_WARNS() << "Failed to load basic shaders." << LL_ENDL;
+        LL_ERRS() << "Unable to load basic shaders, verify graphics driver installed and current." << LL_ENDL;
         llassert(loaded);
+        reentrance = false; // For hygiene only, re-try probably helps nothing 
+        return;
     }
 
-    if (loaded)
-    {
         gPipeline.mVertexShadersEnabled = TRUE;
         gPipeline.mVertexShadersLoaded = 1;
 
@@ -686,8 +682,8 @@ void LLViewerShaderMgr::setShaders()
                 mShaderLevel[SHADER_AVATAR] = 0;
                 mShaderLevel[SHADER_DEFERRED] = 0;
 
-                gSavedSettings.setBOOL("RenderDeferred", FALSE);
-                gSavedSettings.setBOOL("RenderAvatarCloth", FALSE);
+                    gSavedSettings.setBOOL("RenderDeferred", FALSE);
+                    gSavedSettings.setBOOL("RenderAvatarCloth", FALSE);
 
                 loadShadersAvatar(); // unloads
 
@@ -718,21 +714,9 @@ void LLViewerShaderMgr::setShaders()
             setShaders();
             return;
         }
-    }
-    else
-    {
-        LLGLSLShader::sNoFixedFunction = false;
-        gPipeline.mVertexShadersEnabled = FALSE;
-        gPipeline.mVertexShadersLoaded = 0;
-        mShaderLevel[SHADER_LIGHTING] = 0;
-        mShaderLevel[SHADER_INTERFACE] = 0;
-        mShaderLevel[SHADER_ENVIRONMENT] = 0;
-        mShaderLevel[SHADER_WATER] = 0;
-        mShaderLevel[SHADER_OBJECT] = 0;
-        mShaderLevel[SHADER_EFFECT] = 0;
-        mShaderLevel[SHADER_WINDLIGHT] = 0;
-        mShaderLevel[SHADER_AVATAR] = 0;
-    }
+
+    // gPipeline.mVertexShadersEnabled = FALSE;
+    // gPipeline.mVertexShadersLoaded = 0;
     
     if (gViewerWindow)
     {
diff --git a/indra/newview/llviewerwindow.cpp b/indra/newview/llviewerwindow.cpp
index 198007aaa1..10631afd13 100644
--- a/indra/newview/llviewerwindow.cpp
+++ b/indra/newview/llviewerwindow.cpp
@@ -2065,20 +2065,6 @@ void LLViewerWindow::initGLDefaults()
 {
 	gGL.setSceneBlendType(LLRender::BT_ALPHA);
 
-	if (!LLGLSLShader::sNoFixedFunction)
-	{ //initialize fixed function state
-		glColorMaterial( GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE );
-
-		glMaterialfv(GL_FRONT_AND_BACK,GL_AMBIENT,LLColor4::black.mV);
-		glMaterialfv(GL_FRONT_AND_BACK,GL_DIFFUSE,LLColor4::white.mV);
-
-		// lights for objects
-		glShadeModel( GL_SMOOTH );
-
-		gGL.getTexUnit(0)->enable(LLTexUnit::TT_TEXTURE);
-		gGL.getTexUnit(0)->setTextureBlendType(LLTexUnit::TB_MULT);
-	}
-
 	glPixelStorei(GL_PACK_ALIGNMENT,1);
 	glPixelStorei(GL_UNPACK_ALIGNMENT,1);
 
@@ -2694,10 +2680,7 @@ void LLViewerWindow::drawDebugText()
 	gGL.color4f(1,1,1,1);
 	gGL.pushMatrix();
 	gGL.pushUIMatrix();
-	if (LLGLSLShader::sNoFixedFunction)
-	{
-		gUIProgram.bind();
-	}
+	gUIProgram.bind();
 	{
 		// scale view by UI global scale factor and aspect ratio correction factor
 		gGL.scaleUI(mDisplayScale.mV[VX], mDisplayScale.mV[VY], 1.f);
@@ -2707,10 +2690,7 @@ void LLViewerWindow::drawDebugText()
 	gGL.popMatrix();
 
 	gGL.flush();
-	if (LLGLSLShader::sNoFixedFunction)
-	{
-		gUIProgram.unbind();
-	}
+	gUIProgram.unbind();
 }
 
 void LLViewerWindow::draw()
@@ -2756,10 +2736,7 @@ void LLViewerWindow::draw()
 	// Draw all nested UI views.
 	// No translation needed, this view is glued to 0,0
 
-	if (LLGLSLShader::sNoFixedFunction)
-	{
-		gUIProgram.bind();
-	}
+	gUIProgram.bind();
 
 	gGL.pushMatrix();
 	LLUI::pushMatrix();
@@ -2835,14 +2812,9 @@ void LLViewerWindow::draw()
 	LLUI::popMatrix();
 	gGL.popMatrix();
 
-	if (LLGLSLShader::sNoFixedFunction)
-	{
-		gUIProgram.unbind();
-	}
+	gUIProgram.unbind();
 
-//#if LL_DEBUG
 	LLView::sIsDrawing = FALSE;
-//#endif
 }
 
 // Takes a single keyup event, usually when UI is visible
diff --git a/indra/newview/llvoavatar.cpp b/indra/newview/llvoavatar.cpp
index 84bb67a03d..da856beb6e 100644
--- a/indra/newview/llvoavatar.cpp
+++ b/indra/newview/llvoavatar.cpp
@@ -5053,11 +5053,6 @@ U32 LLVOAvatar::renderSkinned()
 		bool should_alpha_mask = shouldAlphaMask();
 		LLGLState test(GL_ALPHA_TEST, should_alpha_mask);
 		
-		if (should_alpha_mask && !LLGLSLShader::sNoFixedFunction)
-		{
-			gGL.setAlphaRejectSettings(LLRender::CF_GREATER, 0.5f);
-		}
-		
 		BOOL first_pass = TRUE;
 		if (!LLDrawPoolAvatar::sSkipOpaque)
 		{
@@ -5104,11 +5099,6 @@ U32 LLVOAvatar::renderSkinned()
 			}
 		}
 
-		if (should_alpha_mask && !LLGLSLShader::sNoFixedFunction)
-		{
-			gGL.setAlphaRejectSettings(LLRender::CF_DEFAULT);
-		}
-
 		if (!LLDrawPoolAvatar::sSkipTransparent || LLPipeline::sImpostorRender)
 		{
 			LLGLState blend(GL_BLEND, !mIsDummy);
@@ -5193,11 +5183,6 @@ U32 LLVOAvatar::renderRigid()
 	bool should_alpha_mask = shouldAlphaMask();
 	LLGLState test(GL_ALPHA_TEST, should_alpha_mask);
 
-	if (should_alpha_mask && !LLGLSLShader::sNoFixedFunction)
-	{
-		gGL.setAlphaRejectSettings(LLRender::CF_GREATER, 0.5f);
-	}
-
 	if (isTextureVisible(TEX_EYES_BAKED) || (getOverallAppearance() == AOA_JELLYDOLL && !isControlAvatar()) || isUIAvatar())
 	{
 		LLViewerJoint* eyeball_left = getViewerJoint(MESH_ID_EYEBALL_LEFT);
@@ -5212,11 +5197,6 @@ U32 LLVOAvatar::renderRigid()
 		}
 	}
 
-	if (should_alpha_mask && !LLGLSLShader::sNoFixedFunction)
-	{
-		gGL.setAlphaRejectSettings(LLRender::CF_DEFAULT);
-	}
-	
 	return num_indices;
 }
 
diff --git a/indra/newview/llvosurfacepatch.cpp b/indra/newview/llvosurfacepatch.cpp
index 4d25e8c7bd..8fbecbc7d7 100644
--- a/indra/newview/llvosurfacepatch.cpp
+++ b/indra/newview/llvosurfacepatch.cpp
@@ -59,63 +59,8 @@ public:
 	// virtual
 	void setupVertexBuffer(U32 data_mask)
 	{	
-		if (LLGLSLShader::sNoFixedFunction)
-		{ //just use default if shaders are in play
-			LLVertexBuffer::setupVertexBuffer(data_mask & ~(MAP_TEXCOORD2 | MAP_TEXCOORD3));
-			return;
-		}
-
-		volatile U8* base = useVBOs() ? (U8*) mAlignedOffset : mMappedData;
-
-		//assume tex coords 2 and 3 are present
-		U32 type_mask = mTypeMask | MAP_TEXCOORD2 | MAP_TEXCOORD3;
-
-		if ((data_mask & type_mask) != data_mask)
-		{
-			LL_ERRS() << "LLVertexBuffer::setupVertexBuffer missing required components for supplied data mask." << LL_ENDL;
-		}
-
-		if (data_mask & MAP_NORMAL)
-		{
-			glNormalPointer(GL_FLOAT, LLVertexBuffer::sTypeSize[TYPE_NORMAL], (void*)(base + mOffsets[TYPE_NORMAL]));
-		}
-		if (data_mask & MAP_TEXCOORD3)
-		{ //substitute tex coord 1 for tex coord 3
-			glClientActiveTextureARB(GL_TEXTURE3_ARB);
-			glTexCoordPointer(2,GL_FLOAT, LLVertexBuffer::sTypeSize[TYPE_TEXCOORD1], (void*)(base + mOffsets[TYPE_TEXCOORD1]));
-			glClientActiveTextureARB(GL_TEXTURE0_ARB);
-		}
-		if (data_mask & MAP_TEXCOORD2)
-		{ //substitute tex coord 0 for tex coord 2
-			glClientActiveTextureARB(GL_TEXTURE2_ARB);
-			glTexCoordPointer(2,GL_FLOAT, LLVertexBuffer::sTypeSize[TYPE_TEXCOORD0], (void*)(base + mOffsets[TYPE_TEXCOORD0]));
-			glClientActiveTextureARB(GL_TEXTURE0_ARB);
-		}
-		if (data_mask & MAP_TEXCOORD1)
-		{
-			glClientActiveTextureARB(GL_TEXTURE1_ARB);
-			glTexCoordPointer(2,GL_FLOAT, LLVertexBuffer::sTypeSize[TYPE_TEXCOORD1], (void*)(base + mOffsets[TYPE_TEXCOORD1]));
-			glClientActiveTextureARB(GL_TEXTURE0_ARB);
-		}
-		if (data_mask & MAP_TANGENT)
-		{
-			glClientActiveTextureARB(GL_TEXTURE2_ARB);
-			glTexCoordPointer(3,GL_FLOAT, LLVertexBuffer::sTypeSize[TYPE_TANGENT], (void*)(base + mOffsets[TYPE_TANGENT]));
-			glClientActiveTextureARB(GL_TEXTURE0_ARB);
-		}
-		if (data_mask & MAP_TEXCOORD0)
-		{
-			glTexCoordPointer(2,GL_FLOAT, LLVertexBuffer::sTypeSize[TYPE_TEXCOORD0], (void*)(base + mOffsets[TYPE_TEXCOORD0]));
-		}
-		if (data_mask & MAP_COLOR)
-		{
-			glColorPointer(4, GL_UNSIGNED_BYTE, LLVertexBuffer::sTypeSize[TYPE_COLOR], (void*)(base + mOffsets[TYPE_COLOR]));
-		}
-		
-		if (data_mask & MAP_VERTEX)
-		{
-			glVertexPointer(3,GL_FLOAT, LLVertexBuffer::sTypeSize[TYPE_VERTEX], (void*)(base + 0));
-		}
+		LLVertexBuffer::setupVertexBuffer(data_mask & ~(MAP_TEXCOORD2 | MAP_TEXCOORD3));
+		return;
 	}
 };
 
diff --git a/indra/newview/llvowater.cpp b/indra/newview/llvowater.cpp
index efe6aa158e..089a7712c0 100644
--- a/indra/newview/llvowater.cpp
+++ b/indra/newview/llvowater.cpp
@@ -143,7 +143,7 @@ BOOL LLVOWater::updateGeometry(LLDrawable *drawable)
 	static const unsigned int vertices_per_quad = 4;
 	static const unsigned int indices_per_quad = 6;
 
-	const S32 size = LLPipeline::sRenderTransparentWater && LLGLSLShader::sNoFixedFunction ? 16 : 1;
+	const S32 size = LLPipeline::sRenderTransparentWater ? 16 : 1;
 
 	const S32 num_quads = size * size;
 	face->setSize(vertices_per_quad * num_quads,
diff --git a/indra/newview/pipeline.cpp b/indra/newview/pipeline.cpp
index 1f4fdca2e7..8881b78593 100644
--- a/indra/newview/pipeline.cpp
+++ b/indra/newview/pipeline.cpp
@@ -1061,7 +1061,6 @@ void LLPipeline::refreshCachedSettings()
 
 	LLPipeline::sUseOcclusion = 
 			(!gUseWireframe
-			&& LLGLSLShader::sNoFixedFunction
 			&& LLFeatureManager::getInstance()->isFeatureAvailable("UseOcclusion") 
 			&& gSavedSettings.getBOOL("UseOcclusion") 
 			&& gGLManager.mHasOcclusionQuery) ? 2 : 0;
@@ -2338,8 +2337,7 @@ static LLTrace::BlockTimerStatHandle FTM_CULL("Object Culling");
 void LLPipeline::updateCull(LLCamera& camera, LLCullResult& result, S32 water_clip, LLPlane* planep)
 {
 	static LLCachedControl<bool> use_occlusion(gSavedSettings,"UseOcclusion");
-	static bool can_use_occlusion = LLGLSLShader::sNoFixedFunction
-									&& LLFeatureManager::getInstance()->isFeatureAvailable("UseOcclusion") 
+	static bool can_use_occlusion = LLFeatureManager::getInstance()->isFeatureAvailable("UseOcclusion") 
 									&& gGLManager.mHasOcclusionQuery;
 
 	LL_RECORD_BLOCK_TIME(FTM_CULL);
@@ -2650,7 +2648,7 @@ void LLPipeline::doOcclusion(LLCamera& camera)
 		LLGLDisable cull(GL_CULL_FACE);
 
 		
-		bool bind_shader = LLGLSLShader::sNoFixedFunction && LLGLSLShader::sCurBoundShader == 0;
+		bool bind_shader = (LLGLSLShader::sCurBoundShader == 0);
 		if (bind_shader)
 		{
 			if (LLPipeline::sShadowRender)
@@ -3992,10 +3990,7 @@ void render_hud_elements()
 	
 	gGL.color4f(1,1,1,1);
 	
-	if (LLGLSLShader::sNoFixedFunction)
-	{
-		gUIProgram.bind();
-	}
+	gUIProgram.bind();
 	LLGLDepthTest depth(GL_TRUE, GL_FALSE);
 
 	if (!LLPipeline::sReflectionRender && gPipeline.hasRenderDebugFeatureMask(LLPipeline::RENDER_DEBUG_FEATURE_UI))
@@ -4027,10 +4022,7 @@ void render_hud_elements()
 		LLHUDText::renderAllHUD();
 	}
 
-	if (LLGLSLShader::sNoFixedFunction)
-	{
-		gUIProgram.unbind();
-	}
+	gUIProgram.unbind();
 	gGL.flush();
 }
 
@@ -4062,10 +4054,7 @@ void LLPipeline::renderHighlights()
 
 		gGL.setColorMask(false, false);
 
-        if (LLGLSLShader::sNoFixedFunction)
-        {
-            gHighlightProgram.bind();
-        }
+        gHighlightProgram.bind();
 
 		for (std::set<HighlightItem>::iterator iter = mHighlightSet.begin(); iter != mHighlightSet.end(); ++iter)
 		{
@@ -4297,7 +4286,6 @@ void LLPipeline::renderGeom(LLCamera& camera, bool forceVBOUpdate)
 	// Do verification of GL state
 	LLGLState::checkStates();
 	LLGLState::checkTextureChannels();
-	LLGLState::checkClientArrays();
 	if (mRenderDebugMask & RENDER_DEBUG_VERIFY)
 	{
 		if (!verify())
@@ -4546,7 +4534,6 @@ void LLPipeline::renderGeomDeferred(LLCamera& camera)
 
 		LLGLState::checkStates();
 		LLGLState::checkTextureChannels();
-		LLGLState::checkClientArrays();
 
 		U32 cur_type = 0;
 
@@ -4819,10 +4806,7 @@ void LLPipeline::renderPhysicsDisplay()
 
 	gGL.setColorMask(true, false);
 
-	if (LLGLSLShader::sNoFixedFunction)
-	{
-		gDebugProgram.bind();
-	}
+	gDebugProgram.bind();
 
 	for (LLWorld::region_list_t::const_iterator iter = LLWorld::getInstance()->getRegionList().begin(); 
 			iter != LLWorld::getInstance()->getRegionList().end(); ++iter)
@@ -4843,11 +4827,7 @@ void LLPipeline::renderPhysicsDisplay()
 
 	gGL.flush();
 
-	if (LLGLSLShader::sNoFixedFunction)
-	{
-		gDebugProgram.unbind();
-	}
-
+	gDebugProgram.unbind();
 	mPhysicsDisplay.flush();
 }
 
@@ -4874,13 +4854,10 @@ void LLPipeline::renderDebug()
 
 				if ( pathfindingCharacter->getVisible() || gAgentCamera.cameraMouselook() )			
 				{	
-					if (LLGLSLShader::sNoFixedFunction)
-					{					
-						gPathfindingProgram.bind();			
-						gPathfindingProgram.uniform1f(sTint, 1.f);
-						gPathfindingProgram.uniform1f(sAmbiance, 1.f);
-						gPathfindingProgram.uniform1f(sAlphaScale, 1.f);
-					}
+					gPathfindingProgram.bind();			
+					gPathfindingProgram.uniform1f(sTint, 1.f);
+					gPathfindingProgram.uniform1f(sAmbiance, 1.f);
+					gPathfindingProgram.uniform1f(sAlphaScale, 1.f);
 
 					//Requried character physics capsule render parameters
 					LLUUID id;					
@@ -4889,21 +4866,14 @@ void LLPipeline::renderDebug()
 				
 					if ( pathfindingCharacter->isPhysicsCapsuleEnabled( id, pos, rot ) )
 					{
-						if (LLGLSLShader::sNoFixedFunction)
-						{					
-							//remove blending artifacts
-							gGL.setColorMask(false, false);
-							llPathingLibInstance->renderSimpleShapeCapsuleID( gGL, id, pos, rot );				
-							gGL.setColorMask(true, false);
-							LLGLEnable blend(GL_BLEND);
-							gPathfindingProgram.uniform1f(sAlphaScale, 0.90f);
-							llPathingLibInstance->renderSimpleShapeCapsuleID( gGL, id, pos, rot );
-							gPathfindingProgram.bind();
-						}
-						else
-						{
-							llPathingLibInstance->renderSimpleShapeCapsuleID( gGL, id, pos, rot );
-						}
+						//remove blending artifacts
+						gGL.setColorMask(false, false);
+						llPathingLibInstance->renderSimpleShapeCapsuleID( gGL, id, pos, rot );				
+						gGL.setColorMask(true, false);
+						LLGLEnable blend(GL_BLEND);
+						gPathfindingProgram.uniform1f(sAlphaScale, 0.90f);
+						llPathingLibInstance->renderSimpleShapeCapsuleID( gGL, id, pos, rot );
+						gPathfindingProgram.bind();
 					}
 				}
 			}
@@ -4919,14 +4889,11 @@ void LLPipeline::renderDebug()
 				{				
 					F32 ambiance = gSavedSettings.getF32("PathfindingAmbiance");
 
-					if (LLGLSLShader::sNoFixedFunction)
-					{					
-						gPathfindingProgram.bind();
+					gPathfindingProgram.bind();
 			
-						gPathfindingProgram.uniform1f(sTint, 1.f);
-						gPathfindingProgram.uniform1f(sAmbiance, ambiance);
-						gPathfindingProgram.uniform1f(sAlphaScale, 1.f);
-					}
+					gPathfindingProgram.uniform1f(sTint, 1.f);
+					gPathfindingProgram.uniform1f(sAmbiance, ambiance);
+					gPathfindingProgram.uniform1f(sAlphaScale, 1.f);
 
 					if ( !pathfindingConsole->isRenderWorld() )
 					{
@@ -4958,18 +4925,11 @@ void LLPipeline::renderDebug()
 						}
 						
 						//render edges
-						if (LLGLSLShader::sNoFixedFunction)
-						{
-							gPathfindingNoNormalsProgram.bind();
-							gPathfindingNoNormalsProgram.uniform1f(sTint, 1.f);
-							gPathfindingNoNormalsProgram.uniform1f(sAlphaScale, 1.f);
-							llPathingLibInstance->renderNavMeshEdges();
-							gPathfindingProgram.bind();
-						}
-						else
-						{
-							llPathingLibInstance->renderNavMeshEdges();
-						}
+						gPathfindingNoNormalsProgram.bind();
+						gPathfindingNoNormalsProgram.uniform1f(sTint, 1.f);
+						gPathfindingNoNormalsProgram.uniform1f(sAlphaScale, 1.f);
+						llPathingLibInstance->renderNavMeshEdges();
+						gPathfindingProgram.bind();
 
 						gGL.flush();
 						glPolygonMode( GL_FRONT_AND_BACK, GL_FILL );	
@@ -4980,53 +4940,31 @@ void LLPipeline::renderDebug()
 					if ( LLPathfindingPathTool::getInstance()->isRenderPath() )
 					{
 						//The path
-						if (LLGLSLShader::sNoFixedFunction)
-						{
-							gUIProgram.bind();
-							gGL.getTexUnit(0)->bind(LLViewerFetchedTexture::sWhiteImagep);
-							llPathingLibInstance->renderPath();
-							gPathfindingProgram.bind();
-						}
-						else
-						{
-							llPathingLibInstance->renderPath();
-						}
-						//The bookends
-						if (LLGLSLShader::sNoFixedFunction)
-						{
-							//remove blending artifacts
-							gGL.setColorMask(false, false);
-							llPathingLibInstance->renderPathBookend( gGL, LLPathingLib::LLPL_START );
-							llPathingLibInstance->renderPathBookend( gGL, LLPathingLib::LLPL_END );
+						gUIProgram.bind();
+						gGL.getTexUnit(0)->bind(LLViewerFetchedTexture::sWhiteImagep);
+						llPathingLibInstance->renderPath();
+						gPathfindingProgram.bind();
+
+                        //The bookends
+						//remove blending artifacts
+						gGL.setColorMask(false, false);
+						llPathingLibInstance->renderPathBookend( gGL, LLPathingLib::LLPL_START );
+						llPathingLibInstance->renderPathBookend( gGL, LLPathingLib::LLPL_END );
 						
-							gGL.setColorMask(true, false);
-							//render the bookends
-							LLGLEnable blend(GL_BLEND);
-							gPathfindingProgram.uniform1f(sAlphaScale, 0.90f);
-							llPathingLibInstance->renderPathBookend( gGL, LLPathingLib::LLPL_START );
-							llPathingLibInstance->renderPathBookend( gGL, LLPathingLib::LLPL_END );
-							gPathfindingProgram.bind();
-						}
-						else
-						{
-							llPathingLibInstance->renderPathBookend( gGL, LLPathingLib::LLPL_START );
-							llPathingLibInstance->renderPathBookend( gGL, LLPathingLib::LLPL_END );
-						}
-					
+						gGL.setColorMask(true, false);
+						//render the bookends
+						LLGLEnable blend(GL_BLEND);
+						gPathfindingProgram.uniform1f(sAlphaScale, 0.90f);
+						llPathingLibInstance->renderPathBookend( gGL, LLPathingLib::LLPL_START );
+						llPathingLibInstance->renderPathBookend( gGL, LLPathingLib::LLPL_END );
+						gPathfindingProgram.bind();
 					}
 				
 					if ( pathfindingConsole->isRenderWaterPlane() )
 					{	
-						if (LLGLSLShader::sNoFixedFunction)
-						{
-							LLGLEnable blend(GL_BLEND);
-							gPathfindingProgram.uniform1f(sAlphaScale, 0.90f);
-							llPathingLibInstance->renderSimpleShapes( gGL, gAgent.getRegion()->getWaterHeight() );
-						}
-						else
-						{
-							llPathingLibInstance->renderSimpleShapes( gGL, gAgent.getRegion()->getWaterHeight() );					
-						}
+						LLGLEnable blend(GL_BLEND);
+						gPathfindingProgram.uniform1f(sAlphaScale, 0.90f);
+						llPathingLibInstance->renderSimpleShapes( gGL, gAgent.getRegion()->getWaterHeight() );
 					}
 				//physics/exclusion shapes
 				if ( pathfindingConsole->isRenderAnyShapes() )
@@ -5157,18 +5095,11 @@ void LLPipeline::renderDebug()
 						}
 
 						//render edges
-						if (LLGLSLShader::sNoFixedFunction)
-						{
-							gPathfindingNoNormalsProgram.bind();
-							gPathfindingNoNormalsProgram.uniform1f(sTint, gSavedSettings.getF32("PathfindingXRayTint"));
-							gPathfindingNoNormalsProgram.uniform1f(sAlphaScale, gSavedSettings.getF32("PathfindingXRayOpacity"));
-							llPathingLibInstance->renderNavMeshEdges();
-							gPathfindingProgram.bind();
-						}
-						else
-						{
-							llPathingLibInstance->renderNavMeshEdges();
-						}
+						gPathfindingNoNormalsProgram.bind();
+						gPathfindingNoNormalsProgram.uniform1f(sTint, gSavedSettings.getF32("PathfindingXRayTint"));
+						gPathfindingNoNormalsProgram.uniform1f(sAlphaScale, gSavedSettings.getF32("PathfindingXRayOpacity"));
+						llPathingLibInstance->renderNavMeshEdges();
+						gPathfindingProgram.bind();
 					
 						gGL.flush();
 						glLineWidth(1.0f);	
@@ -5177,10 +5108,7 @@ void LLPipeline::renderDebug()
 					glPolygonOffset(0.f, 0.f);
 
 					gGL.flush();
-					if (LLGLSLShader::sNoFixedFunction)
-					{
-						gPathfindingProgram.unbind();
-					}
+					gPathfindingProgram.unbind();
 				}
 			}
 		}
@@ -5195,10 +5123,7 @@ void LLPipeline::renderDebug()
 	
 	if (!hud_only && !mDebugBlips.empty())
 	{ //render debug blips
-		if (LLGLSLShader::sNoFixedFunction)
-		{
-			gUIProgram.bind();
-		}
+		gUIProgram.bind();
 
 		gGL.getTexUnit(0)->bind(LLViewerFetchedTexture::sWhiteImagep, true);
 
@@ -5262,7 +5187,7 @@ void LLPipeline::renderDebug()
 		}
 	}
 
-	if (gPipeline.hasRenderDebugMask(LLPipeline::RENDER_DEBUG_OCCLUSION) && LLGLSLShader::sNoFixedFunction)
+	if (gPipeline.hasRenderDebugMask(LLPipeline::RENDER_DEBUG_OCCLUSION))
 	{ //render visible selected group occlusion geometry
 		gDebugProgram.bind();
 		LLGLDepthTest depth(GL_TRUE, GL_FALSE);
@@ -5284,44 +5209,38 @@ void LLPipeline::renderDebug()
 
 	visible_selected_groups.clear();
 
-	if (LLGLSLShader::sNoFixedFunction)
-	{
-		gUIProgram.bind();
-	}
+	gUIProgram.bind();
 
 	if (hasRenderDebugMask(LLPipeline::RENDER_DEBUG_RAYCAST) && !hud_only)
 	{ //draw crosshairs on particle intersection
 		if (gDebugRaycastParticle)
 		{
-			if (LLGLSLShader::sNoFixedFunction)
-			{ //this debug display requires shaders
-				gDebugProgram.bind();
+			gDebugProgram.bind();
 
-				gGL.getTexUnit(0)->unbind(LLTexUnit::TT_TEXTURE);
+			gGL.getTexUnit(0)->unbind(LLTexUnit::TT_TEXTURE);
 
-				LLVector3 center(gDebugRaycastParticleIntersection.getF32ptr());
-				LLVector3 size(0.1f, 0.1f, 0.1f);
+			LLVector3 center(gDebugRaycastParticleIntersection.getF32ptr());
+			LLVector3 size(0.1f, 0.1f, 0.1f);
 
-				LLVector3 p[6];
+			LLVector3 p[6];
 
-				p[0] = center + size.scaledVec(LLVector3(1,0,0));
-				p[1] = center + size.scaledVec(LLVector3(-1,0,0));
-				p[2] = center + size.scaledVec(LLVector3(0,1,0));
-				p[3] = center + size.scaledVec(LLVector3(0,-1,0));
-				p[4] = center + size.scaledVec(LLVector3(0,0,1));
-				p[5] = center + size.scaledVec(LLVector3(0,0,-1));
+			p[0] = center + size.scaledVec(LLVector3(1,0,0));
+			p[1] = center + size.scaledVec(LLVector3(-1,0,0));
+			p[2] = center + size.scaledVec(LLVector3(0,1,0));
+			p[3] = center + size.scaledVec(LLVector3(0,-1,0));
+			p[4] = center + size.scaledVec(LLVector3(0,0,1));
+			p[5] = center + size.scaledVec(LLVector3(0,0,-1));
 				
-				gGL.begin(LLRender::LINES);
-				gGL.diffuseColor3f(1.f, 1.f, 0.f);
-				for (U32 i = 0; i < 6; i++)
-				{
-					gGL.vertex3fv(p[i].mV);
-				}
-				gGL.end();
-				gGL.flush();
-
-				gDebugProgram.unbind();
+			gGL.begin(LLRender::LINES);
+			gGL.diffuseColor3f(1.f, 1.f, 0.f);
+			for (U32 i = 0; i < 6; i++)
+			{
+				gGL.vertex3fv(p[i].mV);
 			}
+			gGL.end();
+			gGL.flush();
+
+			gDebugProgram.unbind();
 		}
 	}
 
@@ -5554,10 +5473,7 @@ void LLPipeline::renderDebug()
 	}
 
 	gGL.flush();
-	if (LLGLSLShader::sNoFixedFunction)
-	{
-		gUIProgram.unbind();
-	}
+	gUIProgram.unbind();
 }
 
 void LLPipeline::rebuildPools()
@@ -6226,11 +6142,6 @@ void LLPipeline::setupHWLights(LLDrawPool* pool)
     LLEnvironment& environment = LLEnvironment::instance();
     LLSettingsSky::ptr_t psky = environment.getCurrentSky();
 
-	if (!LLGLSLShader::sNoFixedFunction)
-	{
-		gGL.syncMatrices();
-	}
-
     // Ambient
     LLColor4 ambient = psky->getTotalAmbient();
 		gGL.setAmbientLightColor(ambient);
@@ -6429,11 +6340,6 @@ void LLPipeline::setupHWLights(LLDrawPool* pool)
     // prev site of forward (non-deferred) character light injection, removed by SL-13522 09/20
 
 	// Init GL state
-	if (!LLGLSLShader::sNoFixedFunction)
-	{
-		glDisable(GL_LIGHTING);
-	}
-
 	for (S32 i = 0; i < 8; ++i)
 	{
 		gGL.getLight(i)->disable();
@@ -6452,13 +6358,6 @@ void LLPipeline::enableLights(U32 mask)
 	if (mLightMask != mask)
 	{
 		stop_glerror();
-		if (!mLightMask)
-		{
-			if (!LLGLSLShader::sNoFixedFunction)
-			{
-				glEnable(GL_LIGHTING);
-			}
-		}
 		if (mask)
 		{
 			stop_glerror();
@@ -6478,13 +6377,6 @@ void LLPipeline::enableLights(U32 mask)
 			}
 			stop_glerror();
 		}
-		else
-		{
-			if (!LLGLSLShader::sNoFixedFunction)
-			{
-				glDisable(GL_LIGHTING);
-			}
-		}
 		mLightMask = mask;
 		stop_glerror();
 	}
@@ -6535,11 +6427,6 @@ void LLPipeline::enableLightsPreview()
 {
 	disableLights();
 
-	if (!LLGLSLShader::sNoFixedFunction)
-	{
-		glEnable(GL_LIGHTING);
-	}
-
 	LLColor4 ambient = PreviewAmbientColor;
 	gGL.setAmbientLightColor(ambient);
 
@@ -8093,18 +7980,7 @@ void LLPipeline::renderFinalize()
 
         LLGLDisable blend(GL_BLEND);
 
-        if (LLGLSLShader::sNoFixedFunction)
-        {
-            gGlowCombineProgram.bind();
-        }
-        else
-        {
-            // tex unit 0
-            gGL.getTexUnit(0)->setTextureColorBlend(LLTexUnit::TBO_REPLACE, LLTexUnit::TBS_TEX_COLOR);
-            // tex unit 1
-            gGL.getTexUnit(1)->setTextureColorBlend(LLTexUnit::TBO_ADD, LLTexUnit::TBS_TEX_COLOR,
-                                                    LLTexUnit::TBS_PREV_COLOR);
-        }
+        gGlowCombineProgram.bind();
 
         gGL.getTexUnit(0)->bind(&mGlow[1]);
         gGL.getTexUnit(1)->bind(&mScreen);
@@ -8114,28 +7990,14 @@ void LLPipeline::renderFinalize()
         buff->setBuffer(mask);
         buff->drawArrays(LLRender::TRIANGLE_STRIP, 0, 3);
 
-        if (LLGLSLShader::sNoFixedFunction)
-        {
-            gGlowCombineProgram.unbind();
-        }
-        else
-        {
-            gGL.getTexUnit(1)->disable();
-            gGL.getTexUnit(1)->setTextureBlendType(LLTexUnit::TB_MULT);
-
-            gGL.getTexUnit(0)->activate();
-            gGL.getTexUnit(0)->setTextureBlendType(LLTexUnit::TB_MULT);
-        }
+        gGlowCombineProgram.unbind();
     }
 
     gGL.setSceneBlendType(LLRender::BT_ALPHA);
 
     if (hasRenderDebugMask(LLPipeline::RENDER_DEBUG_PHYSICS_SHAPES))
     {
-        if (LLGLSLShader::sNoFixedFunction)
-        {
-            gSplatTextureRectProgram.bind();
-        }
+        gSplatTextureRectProgram.bind();
 
         gGL.setColorMask(true, false);
 
@@ -8161,10 +8023,7 @@ void LLPipeline::renderFinalize()
         gGL.end();
         gGL.flush();
 
-        if (LLGLSLShader::sNoFixedFunction)
-        {
-            gSplatTextureRectProgram.unbind();
-        }
+        gSplatTextureRectProgram.unbind();
     }
 
     if (LLRenderTarget::sUseFBO)
@@ -9502,17 +9361,11 @@ void LLPipeline::generateWaterReflection(LLCamera& camera_in)
                     renderGeom(camera);
                 }
 
-                if (LLGLSLShader::sNoFixedFunction)
-                {
-                    gUIProgram.bind();
-                }
+                gUIProgram.bind();
 
                 LLWorld::getInstance()->renderPropertyLines();
 
-                if (LLGLSLShader::sNoFixedFunction)
-                {
-                    gUIProgram.unbind();
-                }
+                gUIProgram.unbind();
 
                 mWaterDis.flush();
             }
@@ -10066,10 +9919,7 @@ void LLPipeline::generateHighlight(LLCamera& camera)
 		gGL.setColorMask(true, true);
 		mHighlight.clear();
 
-        if (LLGLSLShader::sNoFixedFunction)
-        {
-            gHighlightProgram.bind();
-        }
+        gHighlightProgram.bind();
 
 		gGL.getTexUnit(0)->bind(LLViewerFetchedTexture::sWhiteImagep);
 		for (std::set<HighlightItem>::iterator iter = mHighlightSet.begin(); iter != mHighlightSet.end(); )
@@ -10951,7 +10801,6 @@ void LLPipeline::generateImpostor(LLVOAvatar* avatar)
     LL_RECORD_BLOCK_TIME(FTM_GENERATE_IMPOSTOR);
 	LLGLState::checkStates();
 	LLGLState::checkTextureChannels();
-	LLGLState::checkClientArrays();
 
 	static LLCullResult result;
 	result.clear();
@@ -11210,11 +11059,7 @@ void LLPipeline::generateImpostor(LLVOAvatar* avatar)
 
 		static const F32 clip_plane = 0.99999f;
 
-		if (LLGLSLShader::sNoFixedFunction)
-		{
-			gDebugProgram.bind();
-		}
-
+		gDebugProgram.bind();
 
 		if (visually_muted)
 		{	// Visually muted avatar
@@ -11228,7 +11073,6 @@ void LLPipeline::generateImpostor(LLVOAvatar* avatar)
 			gGL.diffuseColor4fv(LLColor4::pink.mV );
 		}
 
-		{
 		gGL.begin(LLRender::QUADS);
 		gGL.vertex3f(-1, -1, clip_plane);
 		gGL.vertex3f(1, -1, clip_plane);
@@ -11236,12 +11080,8 @@ void LLPipeline::generateImpostor(LLVOAvatar* avatar)
 		gGL.vertex3f(-1, 1, clip_plane);
 		gGL.end();
 		gGL.flush();
-		}
 
-		if (LLGLSLShader::sNoFixedFunction)
-		{
-			gDebugProgram.unbind();
-		}
+		gDebugProgram.unbind();
 
 		gGL.popMatrix();
 		gGL.matrixMode(LLRender::MM_MODELVIEW);
@@ -11270,7 +11110,6 @@ void LLPipeline::generateImpostor(LLVOAvatar* avatar)
 	LLVertexBuffer::unbind();
 	LLGLState::checkStates();
 	LLGLState::checkTextureChannels();
-	LLGLState::checkClientArrays();
 }
 
 bool LLPipeline::hasRenderBatches(const U32 type) const