Merge with viewer-development (mesh)

15 files changed, 928 insertions, 471 deletions

diff --git a/indra/llrender/llfontgl.cpp b/indra/llrender/llfontgl.cpp
index 13008292f6..d6a31dc862 100644
--- a/indra/llrender/llfontgl.cpp
+++ b/indra/llrender/llfontgl.cpp
@@ -271,7 +271,6 @@ S32 LLFontGL::render(const LLWString &wstr, S32 begin_offset, F32 x, F32 y, cons
 		}
 	}
 
-
 	const LLFontGlyphInfo* next_glyph = NULL;
 
 	const S32 GLYPH_BATCH_SIZE = 30;
diff --git a/indra/llrender/llgl.cpp b/indra/llrender/llgl.cpp
index b1a4051e96..f29ee0e57e 100644
--- a/indra/llrender/llgl.cpp
+++ b/indra/llrender/llgl.cpp
@@ -156,30 +156,27 @@ PFNGLGETQUERYOBJECTUIVARBPROC glGetQueryObjectuivARB = NULL;
 PFNGLPOINTPARAMETERFARBPROC glPointParameterfARB = NULL;
 PFNGLPOINTPARAMETERFVARBPROC glPointParameterfvARB = NULL;
 
-// GL_EXT_framebuffer_object
-PFNGLISRENDERBUFFEREXTPROC glIsRenderbufferEXT = NULL;
-PFNGLBINDRENDERBUFFEREXTPROC glBindRenderbufferEXT = NULL;
-PFNGLDELETERENDERBUFFERSEXTPROC glDeleteRenderbuffersEXT = NULL;
-PFNGLGENRENDERBUFFERSEXTPROC glGenRenderbuffersEXT = NULL;
-PFNGLRENDERBUFFERSTORAGEEXTPROC glRenderbufferStorageEXT = NULL;
-PFNGLGETRENDERBUFFERPARAMETERIVEXTPROC glGetRenderbufferParameterivEXT = NULL;
-PFNGLISFRAMEBUFFEREXTPROC glIsFramebufferEXT = NULL;
-PFNGLBINDFRAMEBUFFEREXTPROC glBindFramebufferEXT = NULL;
-PFNGLDELETEFRAMEBUFFERSEXTPROC glDeleteFramebuffersEXT = NULL;
-PFNGLGENFRAMEBUFFERSEXTPROC glGenFramebuffersEXT = NULL;
-PFNGLCHECKFRAMEBUFFERSTATUSEXTPROC glCheckFramebufferStatusEXT = NULL;
-PFNGLFRAMEBUFFERTEXTURE1DEXTPROC glFramebufferTexture1DEXT = NULL;
-PFNGLFRAMEBUFFERTEXTURE2DEXTPROC glFramebufferTexture2DEXT = NULL;
-PFNGLFRAMEBUFFERTEXTURE3DEXTPROC glFramebufferTexture3DEXT = NULL;
-PFNGLFRAMEBUFFERRENDERBUFFEREXTPROC glFramebufferRenderbufferEXT = NULL;
-PFNGLGETFRAMEBUFFERATTACHMENTPARAMETERIVEXTPROC glGetFramebufferAttachmentParameterivEXT = NULL;
-PFNGLGENERATEMIPMAPEXTPROC glGenerateMipmapEXT = NULL;
-
-// GL_EXT_framebuffer_multisample
-PFNGLRENDERBUFFERSTORAGEMULTISAMPLEEXTPROC glRenderbufferStorageMultisampleEXT = NULL;
-
-// GL_EXT_framebuffer_blit
-PFNGLBLITFRAMEBUFFEREXTPROC glBlitFramebufferEXT = NULL;
+// GL_ARB_framebuffer_object
+PFNGLISRENDERBUFFERPROC glIsRenderbuffer = NULL;
+PFNGLBINDRENDERBUFFERPROC glBindRenderbuffer = NULL;
+PFNGLDELETERENDERBUFFERSPROC glDeleteRenderbuffers = NULL;
+PFNGLGENRENDERBUFFERSPROC glGenRenderbuffers = NULL;
+PFNGLRENDERBUFFERSTORAGEPROC glRenderbufferStorage = NULL;
+PFNGLGETRENDERBUFFERPARAMETERIVPROC glGetRenderbufferParameteriv = NULL;
+PFNGLISFRAMEBUFFERPROC glIsFramebuffer = NULL;
+PFNGLBINDFRAMEBUFFERPROC glBindFramebuffer = NULL;
+PFNGLDELETEFRAMEBUFFERSPROC glDeleteFramebuffers = NULL;
+PFNGLGENFRAMEBUFFERSPROC glGenFramebuffers = NULL;
+PFNGLCHECKFRAMEBUFFERSTATUSPROC glCheckFramebufferStatus = NULL;
+PFNGLFRAMEBUFFERTEXTURE1DPROC glFramebufferTexture1D = NULL;
+PFNGLFRAMEBUFFERTEXTURE2DPROC glFramebufferTexture2D = NULL;
+PFNGLFRAMEBUFFERTEXTURE3DPROC glFramebufferTexture3D = NULL;
+PFNGLFRAMEBUFFERRENDERBUFFERPROC glFramebufferRenderbuffer = NULL;
+PFNGLGETFRAMEBUFFERATTACHMENTPARAMETERIVPROC glGetFramebufferAttachmentParameteriv = NULL;
+PFNGLGENERATEMIPMAPPROC glGenerateMipmap = NULL;
+PFNGLBLITFRAMEBUFFERPROC glBlitFramebuffer = NULL;
+PFNGLRENDERBUFFERSTORAGEMULTISAMPLEPROC glRenderbufferStorageMultisample = NULL;
+PFNGLFRAMEBUFFERTEXTURELAYERPROC glFramebufferTextureLayer = NULL;
 
 // GL_EXT_blend_func_separate
 PFNGLBLENDFUNCSEPARATEEXTPROC glBlendFuncSeparateEXT = NULL;
@@ -318,11 +315,12 @@ LLGLManager::LLGLManager() :
 	mIsDisabled(FALSE),
 
 	mHasMultitexture(FALSE),
+	mHasATIMemInfo(FALSE),
+	mHasNVXMemInfo(FALSE),
 	mNumTextureUnits(1),
 	mHasMipMapGeneration(FALSE),
 	mHasCompressedTextures(FALSE),
 	mHasFramebufferObject(FALSE),
-	mHasFramebufferMultisample(FALSE),
 	mHasBlendFuncSeparate(FALSE),
 
 	mHasVertexBufferObject(FALSE),
@@ -331,6 +329,7 @@ LLGLManager::LLGLManager() :
 	mHasVertexShader(FALSE),
 	mHasFragmentShader(FALSE),
 	mHasOcclusionQuery(FALSE),
+	mHasOcclusionQuery2(FALSE),
 	mHasPointParameters(FALSE),
 	mHasDrawBuffers(FALSE),
 	mHasTextureRectangle(FALSE),
@@ -502,6 +501,20 @@ bool LLGLManager::initGL()
 	// This is called here because it depends on the setting of mIsGF2or4MX, and sets up mHasMultitexture.
 	initExtensions();
 
+	if (mHasATIMemInfo)
+	{ //ask the gl how much vram is free at startup and attempt to use no more than half of that
+		S32 meminfo[4];
+		glGetIntegerv(GL_TEXTURE_FREE_MEMORY_ATI, meminfo);
+
+		mVRAM = meminfo[0]/1024;
+	}
+	else if (mHasNVXMemInfo)
+	{
+		S32 dedicated_memory;
+		glGetIntegerv(GL_GPU_MEMORY_INFO_DEDICATED_VIDMEM_NVX, &dedicated_memory);
+		mVRAM = dedicated_memory/1024;
+	}
+
 	if (mHasMultitexture)
 	{
 		GLint num_tex_units;		
@@ -668,11 +681,6 @@ void LLGLManager::initExtensions()
 # else
 	mHasFramebufferObject = FALSE;
 # endif // GL_EXT_framebuffer_object
-# ifdef GL_EXT_framebuffer_multisample
-	mHasFramebufferMultisample = TRUE;
-# else
-	mHasFramebufferMultisample = FALSE;
-# endif // GL_EXT_framebuffer_multisample
 # ifdef GL_ARB_draw_buffers
 	mHasDrawBuffers = TRUE;
 #else
@@ -700,6 +708,8 @@ void LLGLManager::initExtensions()
 	mHasTextureRectangle = FALSE;
 #else // LL_MESA_HEADLESS
 	mHasMultitexture = glh_init_extensions("GL_ARB_multitexture");
+	mHasATIMemInfo = ExtensionExists("GL_ATI_meminfo", gGLHExts.mSysExts);
+	mHasNVXMemInfo = ExtensionExists("GL_NVX_gpu_memory_info", gGLHExts.mSysExts);
 	mHasMipMapGeneration = glh_init_extensions("GL_SGIS_generate_mipmap");
 	mHasSeparateSpecularColor = glh_init_extensions("GL_EXT_separate_specular_color");
 	mHasAnisotropic = glh_init_extensions("GL_EXT_texture_filter_anisotropic");
@@ -708,12 +718,19 @@ void LLGLManager::initExtensions()
 	mHasARBEnvCombine = ExtensionExists("GL_ARB_texture_env_combine", gGLHExts.mSysExts);
 	mHasCompressedTextures = glh_init_extensions("GL_ARB_texture_compression");
 	mHasOcclusionQuery = ExtensionExists("GL_ARB_occlusion_query", gGLHExts.mSysExts);
+	mHasOcclusionQuery2 = ExtensionExists("GL_ARB_occlusion_query2", gGLHExts.mSysExts);
 	mHasVertexBufferObject = ExtensionExists("GL_ARB_vertex_buffer_object", gGLHExts.mSysExts);
 	mHasDepthClamp = ExtensionExists("GL_ARB_depth_clamp", gGLHExts.mSysExts) || ExtensionExists("GL_NV_depth_clamp", gGLHExts.mSysExts);
 	// mask out FBO support when packed_depth_stencil isn't there 'cause we need it for LLRenderTarget -Brad
-	mHasFramebufferObject = ExtensionExists("GL_EXT_framebuffer_object", gGLHExts.mSysExts)
-		&& ExtensionExists("GL_EXT_packed_depth_stencil", gGLHExts.mSysExts);
-	mHasFramebufferMultisample = mHasFramebufferObject && ExtensionExists("GL_EXT_framebuffer_multisample", gGLHExts.mSysExts);
+#ifdef GL_ARB_framebuffer_object
+	mHasFramebufferObject = ExtensionExists("GL_ARB_framebuffer_object", gGLHExts.mSysExts);
+#else
+	mHasFramebufferObject = ExtensionExists("GL_EXT_framebuffer_object", gGLHExts.mSysExts) &&
+							ExtensionExists("GL_EXT_framebuffer_blit", gGLHExts.mSysExts) &&
+							ExtensionExists("GL_EXT_framebuffer_multisample", gGLHExts.mSysExts) &&
+							ExtensionExists("GL_EXT_packed_depth_stencil", gGLHExts.mSysExts);
+#endif
+	
 	mHasDrawBuffers = ExtensionExists("GL_ARB_draw_buffers", gGLHExts.mSysExts);
 	mHasBlendFuncSeparate = ExtensionExists("GL_EXT_blend_func_separate", gGLHExts.mSysExts);
 	mHasTextureRectangle = ExtensionExists("GL_ARB_texture_rectangle", gGLHExts.mSysExts);
@@ -738,7 +755,6 @@ void LLGLManager::initExtensions()
 		mHasCompressedTextures = FALSE;
 		mHasVertexBufferObject = FALSE;
 		mHasFramebufferObject = FALSE;
-		mHasFramebufferMultisample = FALSE;
 		mHasDrawBuffers = FALSE;
 		mHasBlendFuncSeparate = FALSE;
 		mHasMipMapGeneration = FALSE;
@@ -792,10 +808,9 @@ void LLGLManager::initExtensions()
 		if (strchr(blacklist,'p')) mHasPointParameters = FALSE;//S
 		if (strchr(blacklist,'q')) mHasFramebufferObject = FALSE;//S
 		if (strchr(blacklist,'r')) mHasDrawBuffers = FALSE;//S
-		if (strchr(blacklist,'s')) mHasFramebufferMultisample = FALSE;
-		if (strchr(blacklist,'t')) mHasTextureRectangle = FALSE;
-		if (strchr(blacklist,'u')) mHasBlendFuncSeparate = FALSE;//S
-		if (strchr(blacklist,'v')) mHasDepthClamp = FALSE;
+		if (strchr(blacklist,'s')) mHasTextureRectangle = FALSE;
+		if (strchr(blacklist,'t')) mHasBlendFuncSeparate = FALSE;//S
+		if (strchr(blacklist,'u')) mHasDepthClamp = FALSE;
 		
 	}
 #endif // LL_LINUX || LL_SOLARIS
@@ -828,6 +843,10 @@ void LLGLManager::initExtensions()
 	{
 		LL_INFOS("RenderInit") << "Couldn't initialize GL_ARB_occlusion_query" << LL_ENDL;
 	}
+	if (!mHasOcclusionQuery2)
+	{
+		LL_INFOS("RenderInit") << "Couldn't initialize GL_ARB_occlusion_query2" << LL_ENDL;
+	}
 	if (!mHasPointParameters)
 	{
 		LL_INFOS("RenderInit") << "Couldn't initialize GL_ARB_point_parameters" << LL_ENDL;
@@ -895,28 +914,26 @@ void LLGLManager::initExtensions()
 	if (mHasFramebufferObject)
 	{
 		llinfos << "initExtensions() FramebufferObject-related procs..." << llendl;
-		glIsRenderbufferEXT = (PFNGLISRENDERBUFFEREXTPROC) GLH_EXT_GET_PROC_ADDRESS("glIsRenderbufferEXT");
-		glBindRenderbufferEXT = (PFNGLBINDRENDERBUFFEREXTPROC) GLH_EXT_GET_PROC_ADDRESS("glBindRenderbufferEXT");
-		glDeleteRenderbuffersEXT = (PFNGLDELETERENDERBUFFERSEXTPROC) GLH_EXT_GET_PROC_ADDRESS("glDeleteRenderbuffersEXT");
-		glGenRenderbuffersEXT = (PFNGLGENRENDERBUFFERSEXTPROC) GLH_EXT_GET_PROC_ADDRESS("glGenRenderbuffersEXT");
-		glRenderbufferStorageEXT = (PFNGLRENDERBUFFERSTORAGEEXTPROC) GLH_EXT_GET_PROC_ADDRESS("glRenderbufferStorageEXT");
-		glGetRenderbufferParameterivEXT = (PFNGLGETRENDERBUFFERPARAMETERIVEXTPROC) GLH_EXT_GET_PROC_ADDRESS("glGetRenderbufferParameterivEXT");
-		glIsFramebufferEXT = (PFNGLISFRAMEBUFFEREXTPROC) GLH_EXT_GET_PROC_ADDRESS("glIsFramebufferEXT");
-		glBindFramebufferEXT = (PFNGLBINDFRAMEBUFFEREXTPROC) GLH_EXT_GET_PROC_ADDRESS("glBindFramebufferEXT");
-		glDeleteFramebuffersEXT = (PFNGLDELETEFRAMEBUFFERSEXTPROC) GLH_EXT_GET_PROC_ADDRESS("glDeleteFramebuffersEXT");
-		glGenFramebuffersEXT = (PFNGLGENFRAMEBUFFERSEXTPROC) GLH_EXT_GET_PROC_ADDRESS("glGenFramebuffersEXT");
-		glCheckFramebufferStatusEXT = (PFNGLCHECKFRAMEBUFFERSTATUSEXTPROC) GLH_EXT_GET_PROC_ADDRESS("glCheckFramebufferStatusEXT");
-		glFramebufferTexture1DEXT = (PFNGLFRAMEBUFFERTEXTURE1DEXTPROC) GLH_EXT_GET_PROC_ADDRESS("glFramebufferTexture1DEXT");
-		glFramebufferTexture2DEXT = (PFNGLFRAMEBUFFERTEXTURE2DEXTPROC) GLH_EXT_GET_PROC_ADDRESS("glFramebufferTexture2DEXT");
-		glFramebufferTexture3DEXT = (PFNGLFRAMEBUFFERTEXTURE3DEXTPROC) GLH_EXT_GET_PROC_ADDRESS("glFramebufferTexture3DEXT");
-		glFramebufferRenderbufferEXT = (PFNGLFRAMEBUFFERRENDERBUFFEREXTPROC) GLH_EXT_GET_PROC_ADDRESS("glFramebufferRenderbufferEXT");
-		glGetFramebufferAttachmentParameterivEXT = (PFNGLGETFRAMEBUFFERATTACHMENTPARAMETERIVEXTPROC) GLH_EXT_GET_PROC_ADDRESS("glGetFramebufferAttachmentParameterivEXT");
-		glGenerateMipmapEXT = (PFNGLGENERATEMIPMAPEXTPROC) GLH_EXT_GET_PROC_ADDRESS("glGenerateMipmapEXT");
-	}
-	if (mHasFramebufferMultisample)
-	{
-		glRenderbufferStorageMultisampleEXT = (PFNGLRENDERBUFFERSTORAGEMULTISAMPLEEXTPROC) GLH_EXT_GET_PROC_ADDRESS("glRenderbufferStorageMultisampleEXT");
-		glBlitFramebufferEXT = (PFNGLBLITFRAMEBUFFEREXTPROC) GLH_EXT_GET_PROC_ADDRESS("glBlitFramebufferEXT");
+		glIsRenderbuffer = (PFNGLISRENDERBUFFERPROC) GLH_EXT_GET_PROC_ADDRESS("glIsRenderbuffer");
+		glBindRenderbuffer = (PFNGLBINDRENDERBUFFERPROC) GLH_EXT_GET_PROC_ADDRESS("glBindRenderbuffer");
+		glDeleteRenderbuffers = (PFNGLDELETERENDERBUFFERSPROC) GLH_EXT_GET_PROC_ADDRESS("glDeleteRenderbuffers");
+		glGenRenderbuffers = (PFNGLGENRENDERBUFFERSPROC) GLH_EXT_GET_PROC_ADDRESS("glGenRenderbuffers");
+		glRenderbufferStorage = (PFNGLRENDERBUFFERSTORAGEPROC) GLH_EXT_GET_PROC_ADDRESS("glRenderbufferStorage");
+		glGetRenderbufferParameteriv = (PFNGLGETRENDERBUFFERPARAMETERIVPROC) GLH_EXT_GET_PROC_ADDRESS("glGetRenderbufferParameteriv");
+		glIsFramebuffer = (PFNGLISFRAMEBUFFERPROC) GLH_EXT_GET_PROC_ADDRESS("glIsFramebuffer");
+		glBindFramebuffer = (PFNGLBINDFRAMEBUFFERPROC) GLH_EXT_GET_PROC_ADDRESS("glBindFramebuffer");
+		glDeleteFramebuffers = (PFNGLDELETEFRAMEBUFFERSPROC) GLH_EXT_GET_PROC_ADDRESS("glDeleteFramebuffers");
+		glGenFramebuffers = (PFNGLGENFRAMEBUFFERSPROC) GLH_EXT_GET_PROC_ADDRESS("glGenFramebuffers");
+		glCheckFramebufferStatus = (PFNGLCHECKFRAMEBUFFERSTATUSPROC) GLH_EXT_GET_PROC_ADDRESS("glCheckFramebufferStatus");
+		glFramebufferTexture1D = (PFNGLFRAMEBUFFERTEXTURE1DPROC) GLH_EXT_GET_PROC_ADDRESS("glFramebufferTexture1D");
+		glFramebufferTexture2D = (PFNGLFRAMEBUFFERTEXTURE2DPROC) GLH_EXT_GET_PROC_ADDRESS("glFramebufferTexture2D");
+		glFramebufferTexture3D = (PFNGLFRAMEBUFFERTEXTURE3DPROC) GLH_EXT_GET_PROC_ADDRESS("glFramebufferTexture3D");
+		glFramebufferRenderbuffer = (PFNGLFRAMEBUFFERRENDERBUFFERPROC) GLH_EXT_GET_PROC_ADDRESS("glFramebufferRenderbuffer");
+		glGetFramebufferAttachmentParameteriv = (PFNGLGETFRAMEBUFFERATTACHMENTPARAMETERIVPROC) GLH_EXT_GET_PROC_ADDRESS("glGetFramebufferAttachmentParameteriv");
+		glGenerateMipmap = (PFNGLGENERATEMIPMAPPROC) GLH_EXT_GET_PROC_ADDRESS("glGenerateMipmap");
+		glBlitFramebuffer = (PFNGLBLITFRAMEBUFFERPROC) GLH_EXT_GET_PROC_ADDRESS("glBlitFramebuffer");
+		glRenderbufferStorageMultisample = (PFNGLRENDERBUFFERSTORAGEMULTISAMPLEPROC) GLH_EXT_GET_PROC_ADDRESS("glRenderbufferStorageMultisample");
+		glFramebufferTextureLayer = (PFNGLFRAMEBUFFERTEXTURELAYERPROC) GLH_EXT_GET_PROC_ADDRESS("glFramebufferTextureLayer");
 	}
 	if (mHasDrawBuffers)
 	{
@@ -1874,12 +1891,17 @@ void parse_gl_version( S32* major, S32* minor, S32* release, std::string* vendor
 	}
 }
 
-LLGLUserClipPlane::LLGLUserClipPlane(const LLPlane& p, const glh::matrix4f& modelview, const glh::matrix4f& projection)
+LLGLUserClipPlane::LLGLUserClipPlane(const LLPlane& p, const glh::matrix4f& modelview, const glh::matrix4f& projection, bool apply)
 {
-	mModelview = modelview;
-	mProjection = projection;
+	mApply = apply;
 
-	setPlane(p.mV[0], p.mV[1], p.mV[2], p.mV[3]);
+	if (mApply)
+	{
+		mModelview = modelview;
+		mProjection = projection;
+
+		setPlane(p[0], p[1], p[2], p[3]);
+	}
 }
 
 void LLGLUserClipPlane::setPlane(F32 a, F32 b, F32 c, F32 d)
@@ -1910,9 +1932,12 @@ void LLGLUserClipPlane::setPlane(F32 a, F32 b, F32 c, F32 d)
 
 LLGLUserClipPlane::~LLGLUserClipPlane()
 {
-	glMatrixMode(GL_PROJECTION);
-	glPopMatrix();
-	glMatrixMode(GL_MODELVIEW);
+	if (mApply)
+	{
+		glMatrixMode(GL_PROJECTION);
+		glPopMatrix();
+		glMatrixMode(GL_MODELVIEW);
+	}
 }
 
 LLGLNamePool::LLGLNamePool()
@@ -2093,11 +2118,14 @@ void LLGLDepthTest::checkState()
 	}
 }
 
-LLGLSquashToFarClip::LLGLSquashToFarClip(glh::matrix4f P)
+LLGLSquashToFarClip::LLGLSquashToFarClip(glh::matrix4f P, U32 layer)
 {
+
+	F32 depth = 0.99999f - 0.0001f * layer;
+
 	for (U32 i = 0; i < 4; i++)
 	{
-		P.element(2, i) = P.element(3, i) * 0.99999f;
+		P.element(2, i) = P.element(3, i) * depth;
 	}
 
 	glMatrixMode(GL_PROJECTION);
diff --git a/indra/llrender/llgl.h b/indra/llrender/llgl.h
index 51b0a1e45f..3d002fd8c4 100644
--- a/indra/llrender/llgl.h
+++ b/indra/llrender/llgl.h
@@ -77,11 +77,12 @@ public:
 
 	// Extensions used by everyone
 	BOOL mHasMultitexture;
+	BOOL mHasATIMemInfo;
+	BOOL mHasNVXMemInfo;
 	S32	 mNumTextureUnits;
 	BOOL mHasMipMapGeneration;
 	BOOL mHasCompressedTextures;
 	BOOL mHasFramebufferObject;
-	BOOL mHasFramebufferMultisample;
 	BOOL mHasBlendFuncSeparate;
 	
 	// ARB Extensions
@@ -91,6 +92,7 @@ public:
 	BOOL mHasVertexShader;
 	BOOL mHasFragmentShader;
 	BOOL mHasOcclusionQuery;
+	BOOL mHasOcclusionQuery2;
 	BOOL mHasPointParameters;
 	BOOL mHasDrawBuffers;
 	BOOL mHasDepthClamp;
@@ -300,12 +302,14 @@ class LLGLUserClipPlane
 {
 public:
 	
-	LLGLUserClipPlane(const LLPlane& plane, const glh::matrix4f& modelview, const glh::matrix4f& projection);
+	LLGLUserClipPlane(const LLPlane& plane, const glh::matrix4f& modelview, const glh::matrix4f& projection, bool apply = true);
 	~LLGLUserClipPlane();
 
 	void setPlane(F32 a, F32 b, F32 c, F32 d);
 
 private:
+	bool mApply;
+
 	glh::matrix4f mProjection;
 	glh::matrix4f mModelview;
 };
@@ -321,7 +325,7 @@ private:
 class LLGLSquashToFarClip
 {
 public:
-	LLGLSquashToFarClip(glh::matrix4f projection);
+	LLGLSquashToFarClip(glh::matrix4f projection, U32 layer = 0);
 	~LLGLSquashToFarClip();
 };
 
@@ -419,4 +423,67 @@ extern BOOL gClothRipple;
 extern BOOL gHeadlessClient;
 extern BOOL gGLActive;
 
+// Deal with changing glext.h definitions for newer SDK versions, specifically
+// with MAC OSX 10.5 -> 10.6
+
+
+#ifndef GL_DEPTH_ATTACHMENT
+#define GL_DEPTH_ATTACHMENT GL_DEPTH_ATTACHMENT_EXT
+#endif
+
+#ifndef GL_STENCIL_ATTACHMENT
+#define GL_STENCIL_ATTACHMENT GL_STENCIL_ATTACHMENT_EXT
+#endif
+
+#ifndef GL_FRAMEBUFFER
+#define GL_FRAMEBUFFER GL_FRAMEBUFFER_EXT
+#define GL_DRAW_FRAMEBUFFER GL_DRAW_FRAMEBUFFER_EXT
+#define GL_READ_FRAMEBUFFER GL_READ_FRAMEBUFFER_EXT
+#define GL_FRAMEBUFFER_COMPLETE GL_FRAMEBUFFER_COMPLETE_EXT
+#define GL_FRAMEBUFFER_UNSUPPORTED GL_FRAMEBUFFER_UNSUPPORTED_EXT
+#define GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT_EXT
+#define GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT
+#define glGenFramebuffers glGenFramebuffersEXT
+#define glBindFramebuffer glBindFramebufferEXT
+#define glCheckFramebufferStatus glCheckFramebufferStatusEXT
+#define glBlitFramebuffer glBlitFramebufferEXT
+#define glDeleteFramebuffers glDeleteFramebuffersEXT
+#define glFramebufferRenderbuffer glFramebufferRenderbufferEXT
+#define glFramebufferTexture2D glFramebufferTexture2DEXT
+#endif
+
+#ifndef GL_RENDERBUFFER
+#define GL_RENDERBUFFER GL_RENDERBUFFER_EXT
+#define glGenRenderbuffers glGenRenderbuffersEXT
+#define glBindRenderbuffer glBindRenderbufferEXT
+#define glRenderbufferStorage glRenderbufferStorageEXT
+#define glRenderbufferStorageMultisample glRenderbufferStorageMultisampleEXT
+#define glDeleteRenderbuffers glDeleteRenderbuffersEXT
+#endif
+
+#ifndef GL_COLOR_ATTACHMENT
+#define GL_COLOR_ATTACHMENT GL_COLOR_ATTACHMENT_EXT
+#endif
+
+#ifndef GL_COLOR_ATTACHMENT0
+#define GL_COLOR_ATTACHMENT0 GL_COLOR_ATTACHMENT0_EXT
+#endif
+
+#ifndef GL_COLOR_ATTACHMENT1
+#define GL_COLOR_ATTACHMENT1 GL_COLOR_ATTACHMENT1_EXT
+#endif
+
+#ifndef GL_COLOR_ATTACHMENT2
+#define GL_COLOR_ATTACHMENT2 GL_COLOR_ATTACHMENT2_EXT
+#endif
+
+#ifndef GL_COLOR_ATTACHMENT3
+#define GL_COLOR_ATTACHMENT3 GL_COLOR_ATTACHMENT3_EXT
+#endif
+
+
+#ifndef GL_DEPTH24_STENCIL8
+#define GL_DEPTH24_STENCIL8 GL_DEPTH24_STENCIL8_EXT
+#endif 
+
 #endif // LL_LLGL_H
diff --git a/indra/llrender/llglheaders.h b/indra/llrender/llglheaders.h
index 576969b81a..d8140a124d 100644
--- a/indra/llrender/llglheaders.h
+++ b/indra/llrender/llglheaders.h
@@ -1,25 +1,25 @@
-/** 
+/**
  * @file llglheaders.h
  * @brief LLGL definitions
  *
  * $LicenseInfo:firstyear=2001&license=viewerlgpl$
  * Second Life Viewer Source Code
  * Copyright (C) 2010, Linden Research, Inc.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation;
  * version 2.1 of the License only.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
- * 
+ *
  * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
  * $/LicenseInfo$
  */
@@ -449,30 +449,27 @@ extern PFNGLGETCOMPRESSEDTEXIMAGEARBPROC glGetCompressedTexImageARB;
 //GL_EXT_blend_func_separate
 extern PFNGLBLENDFUNCSEPARATEEXTPROC glBlendFuncSeparateEXT;
 
-//GL_EXT_framebuffer_object
-extern PFNGLISRENDERBUFFEREXTPROC glIsRenderbufferEXT;
-extern PFNGLBINDRENDERBUFFEREXTPROC glBindRenderbufferEXT;
-extern PFNGLDELETERENDERBUFFERSEXTPROC glDeleteRenderbuffersEXT;
-extern PFNGLGENRENDERBUFFERSEXTPROC glGenRenderbuffersEXT;
-extern PFNGLRENDERBUFFERSTORAGEEXTPROC glRenderbufferStorageEXT;
-extern PFNGLGETRENDERBUFFERPARAMETERIVEXTPROC glGetRenderbufferParameterivEXT;
-extern PFNGLISFRAMEBUFFEREXTPROC glIsFramebufferEXT;
-extern PFNGLBINDFRAMEBUFFEREXTPROC glBindFramebufferEXT;
-extern PFNGLDELETEFRAMEBUFFERSEXTPROC glDeleteFramebuffersEXT;
-extern PFNGLGENFRAMEBUFFERSEXTPROC glGenFramebuffersEXT;
-extern PFNGLCHECKFRAMEBUFFERSTATUSEXTPROC glCheckFramebufferStatusEXT;
-extern PFNGLFRAMEBUFFERTEXTURE1DEXTPROC glFramebufferTexture1DEXT;
-extern PFNGLFRAMEBUFFERTEXTURE2DEXTPROC glFramebufferTexture2DEXT;
-extern PFNGLFRAMEBUFFERTEXTURE3DEXTPROC glFramebufferTexture3DEXT;
-extern PFNGLFRAMEBUFFERRENDERBUFFEREXTPROC glFramebufferRenderbufferEXT;
-extern PFNGLGETFRAMEBUFFERATTACHMENTPARAMETERIVEXTPROC glGetFramebufferAttachmentParameterivEXT;
-extern PFNGLGENERATEMIPMAPEXTPROC glGenerateMipmapEXT;
-
-// GL_EXT_framebuffer_multisample
-extern PFNGLRENDERBUFFERSTORAGEMULTISAMPLEEXTPROC glRenderbufferStorageMultisampleEXT;
-
-// GL_EXT_framebuffer_blit
-extern PFNGLBLITFRAMEBUFFEREXTPROC glBlitFramebufferEXT;
+//GL_ARB_framebuffer_object
+extern PFNGLISRENDERBUFFERPROC glIsRenderbuffer;
+extern PFNGLBINDRENDERBUFFERPROC glBindRenderbuffer;
+extern PFNGLDELETERENDERBUFFERSPROC glDeleteRenderbuffers;
+extern PFNGLGENRENDERBUFFERSPROC glGenRenderbuffers;
+extern PFNGLRENDERBUFFERSTORAGEPROC glRenderbufferStorage;
+extern PFNGLGETRENDERBUFFERPARAMETERIVPROC glGetRenderbufferParameteriv;
+extern PFNGLISFRAMEBUFFERPROC glIsFramebuffer;
+extern PFNGLBINDFRAMEBUFFERPROC glBindFramebuffer;
+extern PFNGLDELETEFRAMEBUFFERSPROC glDeleteFramebuffers;
+extern PFNGLGENFRAMEBUFFERSPROC glGenFramebuffers;
+extern PFNGLCHECKFRAMEBUFFERSTATUSPROC glCheckFramebufferStatus;
+extern PFNGLFRAMEBUFFERTEXTURE1DPROC glFramebufferTexture1D;
+extern PFNGLFRAMEBUFFERTEXTURE2DPROC glFramebufferTexture2D;
+extern PFNGLFRAMEBUFFERTEXTURE3DPROC glFramebufferTexture3D;
+extern PFNGLFRAMEBUFFERRENDERBUFFERPROC glFramebufferRenderbuffer;
+extern PFNGLGETFRAMEBUFFERATTACHMENTPARAMETERIVPROC glGetFramebufferAttachmentParameteriv;
+extern PFNGLGENERATEMIPMAPPROC glGenerateMipmap;
+extern PFNGLBLITFRAMEBUFFERPROC glBlitFramebuffer;
+extern PFNGLRENDERBUFFERSTORAGEMULTISAMPLEPROC glRenderbufferStorageMultisample;
+extern PFNGLFRAMEBUFFERTEXTURELAYERPROC glFramebufferTextureLayer;
 
 //GL_ARB_draw_buffers
 extern PFNGLDRAWBUFFERSARBPROC glDrawBuffersARB;
@@ -651,30 +648,27 @@ extern PFNGLGETATTRIBLOCATIONARBPROC glGetAttribLocationARB;
 //GL_EXT_blend_func_separate
 extern PFNGLBLENDFUNCSEPARATEEXTPROC glBlendFuncSeparateEXT;
 
-//GL_EXT_framebuffer_object
-extern PFNGLISRENDERBUFFEREXTPROC glIsRenderbufferEXT;
-extern PFNGLBINDRENDERBUFFEREXTPROC glBindRenderbufferEXT;
-extern PFNGLDELETERENDERBUFFERSEXTPROC glDeleteRenderbuffersEXT;
-extern PFNGLGENRENDERBUFFERSEXTPROC glGenRenderbuffersEXT;
-extern PFNGLRENDERBUFFERSTORAGEEXTPROC glRenderbufferStorageEXT;
-extern PFNGLGETRENDERBUFFERPARAMETERIVEXTPROC glGetRenderbufferParameterivEXT;
-extern PFNGLISFRAMEBUFFEREXTPROC glIsFramebufferEXT;
-extern PFNGLBINDFRAMEBUFFEREXTPROC glBindFramebufferEXT;
-extern PFNGLDELETEFRAMEBUFFERSEXTPROC glDeleteFramebuffersEXT;
-extern PFNGLGENFRAMEBUFFERSEXTPROC glGenFramebuffersEXT;
-extern PFNGLCHECKFRAMEBUFFERSTATUSEXTPROC glCheckFramebufferStatusEXT;
-extern PFNGLFRAMEBUFFERTEXTURE1DEXTPROC glFramebufferTexture1DEXT;
-extern PFNGLFRAMEBUFFERTEXTURE2DEXTPROC glFramebufferTexture2DEXT;
-extern PFNGLFRAMEBUFFERTEXTURE3DEXTPROC glFramebufferTexture3DEXT;
-extern PFNGLFRAMEBUFFERRENDERBUFFEREXTPROC glFramebufferRenderbufferEXT;
-extern PFNGLGETFRAMEBUFFERATTACHMENTPARAMETERIVEXTPROC glGetFramebufferAttachmentParameterivEXT;
-extern PFNGLGENERATEMIPMAPEXTPROC glGenerateMipmapEXT;
-
-// GL_EXT_framebuffer_multisample
-extern PFNGLRENDERBUFFERSTORAGEMULTISAMPLEEXTPROC glRenderbufferStorageMultisampleEXT;
-
-// GL_EXT_framebuffer_blit
-extern PFNGLBLITFRAMEBUFFEREXTPROC glBlitFramebufferEXT;
+//GL_ARB_framebuffer_object
+extern PFNGLISRENDERBUFFERPROC glIsRenderbuffer;
+extern PFNGLBINDRENDERBUFFERPROC glBindRenderbuffer;
+extern PFNGLDELETERENDERBUFFERSPROC glDeleteRenderbuffers;
+extern PFNGLGENRENDERBUFFERSPROC glGenRenderbuffers;
+extern PFNGLRENDERBUFFERSTORAGEPROC glRenderbufferStorage;
+extern PFNGLGETRENDERBUFFERPARAMETERIVPROC glGetRenderbufferParameteriv;
+extern PFNGLISFRAMEBUFFERPROC glIsFramebuffer;
+extern PFNGLBINDFRAMEBUFFERPROC glBindFramebuffer;
+extern PFNGLDELETEFRAMEBUFFERSPROC glDeleteFramebuffers;
+extern PFNGLGENFRAMEBUFFERSPROC glGenFramebuffers;
+extern PFNGLCHECKFRAMEBUFFERSTATUSPROC glCheckFramebufferStatus;
+extern PFNGLFRAMEBUFFERTEXTURE1DPROC glFramebufferTexture1D;
+extern PFNGLFRAMEBUFFERTEXTURE2DPROC glFramebufferTexture2D;
+extern PFNGLFRAMEBUFFERTEXTURE3DPROC glFramebufferTexture3D;
+extern PFNGLFRAMEBUFFERRENDERBUFFERPROC glFramebufferRenderbuffer;
+extern PFNGLGETFRAMEBUFFERATTACHMENTPARAMETERIVPROC glGetFramebufferAttachmentParameteriv;
+extern PFNGLGENERATEMIPMAPPROC glGenerateMipmap;
+extern PFNGLBLITFRAMEBUFFERPROC glBlitFramebuffer;
+extern PFNGLRENDERBUFFERSTORAGEMULTISAMPLEPROC glRenderbufferStorageMultisample;
+extern PFNGLFRAMEBUFFERTEXTURELAYERPROC glFramebufferTextureLayer;
 
 //GL_ARB_draw_buffers
 extern PFNGLDRAWBUFFERSARBPROC glDrawBuffersARB;
@@ -697,7 +691,7 @@ extern PFNGLDRAWBUFFERSARBPROC glDrawBuffersARB;
 #include <AvailabilityMacros.h>
 
 //GL_EXT_blend_func_separate
-extern void glBlendFuncSeparateEXT(GLenum srcRGB, GLenum dstRGB, GLenum srcAlpha, GLenum dstAlpha) AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER;
+extern void glBlendFuncSeparateEXT(GLenum srcRGB, GLenum dstRGB, GLenum srcAlpha, GLenum dstAlpha) ;
 
 // GL_EXT_framebuffer_object
 extern GLboolean glIsRenderbufferEXT(GLuint renderbuffer) AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER;
@@ -718,6 +712,9 @@ extern void glFramebufferRenderbufferEXT(GLenum target, GLenum attachment, GLenu
 extern void glGetFramebufferAttachmentParameterivEXT(GLenum target, GLenum attachment, GLenum pname, GLint *params) AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER;
 extern void glGenerateMipmapEXT(GLenum target) AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER;
 
+#ifndef GL_ARB_framebuffer_object
+#define glGenerateMipmap glGenerateMipmapEXT
+#endif
 // GL_ARB_draw_buffers
 extern void glDrawBuffersARB(GLsizei n, const GLenum* bufs) AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER;
 
@@ -840,4 +837,22 @@ extern void glGetBufferPointervARB (GLenum, GLenum, GLvoid* *);
 #define GL_DEPTH_CLAMP 0x864F
 #endif
 
+//GL_NVX_gpu_memory_info constants
+#ifndef GL_NVX_gpu_memory_info
+#define GL_NVX_gpu_memory_info
+#define	GL_GPU_MEMORY_INFO_DEDICATED_VIDMEM_NVX          0x9047
+#define	GL_GPU_MEMORY_INFO_TOTAL_AVAILABLE_MEMORY_NVX    0x9048
+#define	GL_GPU_MEMORY_INFO_CURRENT_AVAILABLE_VIDMEM_NVX  0x9049
+#define	GL_GPU_MEMORY_INFO_EVICTION_COUNT_NVX            0x904A
+#define	GL_GPU_MEMORY_INFO_EVICTED_MEMORY_NVX            0x904B
+#endif
+
+//GL_ATI_meminfo constants
+#ifndef GL_ATI_meminfo
+#define GL_ATI_meminfo
+#define GL_VBO_FREE_MEMORY_ATI                     0x87FB
+#define GL_TEXTURE_FREE_MEMORY_ATI                 0x87FC
+#define GL_RENDERBUFFER_FREE_MEMORY_ATI            0x87FD
+#endif
+
 #endif // LL_LLGLHEADERS_H
diff --git a/indra/llrender/llglslshader.cpp b/indra/llrender/llglslshader.cpp
index 16534fa9a5..257bcd9380 100644
--- a/indra/llrender/llglslshader.cpp
+++ b/indra/llrender/llglslshader.cpp
@@ -55,7 +55,7 @@ BOOL shouldChange(const LLVector4& v1, const LLVector4& v2)
 
 LLShaderFeatures::LLShaderFeatures()
 : calculatesLighting(false), isShiny(false), isFullbright(false), hasWaterFog(false),
-hasTransport(false), hasSkinning(false), hasAtmospherics(false), isSpecular(false),
+hasTransport(false), hasSkinning(false), hasObjectSkinning(false), hasAtmospherics(false), isSpecular(false),
 hasGamma(false), hasLighting(false), calculatesAtmospherics(false)
 {
 }
@@ -118,7 +118,7 @@ BOOL LLGLSLShader::createShader(vector<string> * attributes,
 	{
 		GLhandleARB shaderhandle = LLShaderMgr::instance()->loadShaderFile((*fileIter).first, mShaderLevel, (*fileIter).second);
 		LL_DEBUGS("ShaderLoading") << "SHADER FILE: " << (*fileIter).first << " mShaderLevel=" << mShaderLevel << LL_ENDL;
-		if (mShaderLevel > 0)
+		if (shaderhandle > 0)
 		{
 			attachObject(shaderhandle);
 		}
@@ -698,17 +698,46 @@ void LLGLSLShader::uniformMatrix4fv(U32 index, U32 count, GLboolean transpose, c
 
 GLint LLGLSLShader::getUniformLocation(const string& uniform)
 {
+	GLint ret = -1;
 	if (mProgramObject > 0)
 	{
 		std::map<string, GLint>::iterator iter = mUniformMap.find(uniform);
 		if (iter != mUniformMap.end())
 		{
-			llassert(iter->second == glGetUniformLocationARB(mProgramObject, uniform.c_str()));
-			return iter->second;
+			if (gDebugGL)
+			{
+				stop_glerror();
+				if (iter->second != glGetUniformLocationARB(mProgramObject, uniform.c_str()))
+				{
+					llerrs << "Uniform does not match." << llendl;
+				}
+				stop_glerror();
+			}
+			ret = iter->second;
 		}
 	}
 
-	return -1;
+	/*if (gDebugGL)
+	{
+		if (ret == -1 && ret != glGetUniformLocationARB(mProgramObject, uniform.c_str()))
+		{
+			llerrs << "Uniform map invalid." << llendl;
+		}
+	}*/
+
+	return ret;
+}
+
+GLint LLGLSLShader::getAttribLocation(U32 attrib)
+{
+	if (attrib < mAttribute.size())
+	{
+		return mAttribute[attrib];
+	}
+	else
+	{
+		return -1;
+	}
 }
 
 void LLGLSLShader::uniform1i(const string& uniform, GLint v)
@@ -882,7 +911,9 @@ void LLGLSLShader::uniformMatrix4fv(const string& uniform, U32 count, GLboolean
 				
 	if (location >= 0)
 	{
+		stop_glerror();
 		glUniformMatrix4fvARB(location, count, transpose, v);
+		stop_glerror();
 	}
 }
 
diff --git a/indra/llrender/llglslshader.h b/indra/llrender/llglslshader.h
index c11bd50716..d46ddbbe18 100644
--- a/indra/llrender/llglslshader.h
+++ b/indra/llrender/llglslshader.h
@@ -42,6 +42,7 @@ public:
 	bool hasWaterFog; // implies no gamma
 	bool hasTransport; // implies no lighting (it's possible to have neither though)
 	bool hasSkinning;	
+	bool hasObjectSkinning;
 	bool hasAtmospherics;
 	bool hasGamma;
 
@@ -103,7 +104,7 @@ public:
 	void vertexAttrib4fv(U32 index, GLfloat* v);
 	
 	GLint getUniformLocation(const std::string& uniform);
-	
+	GLint getAttribLocation(U32 attrib);
 	GLint mapUniformTextureChannel(GLint location, GLenum type);
 	
 
diff --git a/indra/llrender/llglstates.h b/indra/llrender/llglstates.h
index d5a29dcd0c..e26aead676 100644
--- a/indra/llrender/llglstates.h
+++ b/indra/llrender/llglstates.h
@@ -238,9 +238,11 @@ public:
 class LLGLSSpecular
 {
 public:
+	F32 mShininess;
 	LLGLSSpecular(const LLColor4& color, F32 shininess)
 	{
-		if (shininess > 0.0f)
+		mShininess = shininess;
+		if (mShininess > 0.0f)
 		{
 			glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, color.mV);
 			S32 shiny = (S32)(shininess*128.f);
@@ -250,32 +252,14 @@ public:
 	}
 	~LLGLSSpecular()
 	{
-		glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, LLColor4(0.f,0.f,0.f,0.f).mV);
-		glMateriali(GL_FRONT_AND_BACK, GL_SHININESS, 0);
+		if (mShininess > 0.f)
+		{
+			glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, LLColor4(0.f,0.f,0.f,0.f).mV);
+			glMateriali(GL_FRONT_AND_BACK, GL_SHININESS, 0);
+		}
 	}
 };
 
 //----------------------------------------------------------------------------
 
-
-class LLGLSBlendFunc : public LLGLSPipeline {
-protected:
-	GLint mSavedSrc, mSavedDst;
-	LLGLEnable mBlend;
-
-public:
-	LLGLSBlendFunc(GLenum srcFunc, GLenum dstFunc) :
-		mBlend(GL_BLEND)
-	{
-		glGetIntegerv(GL_BLEND_SRC, &mSavedSrc);
-		glGetIntegerv(GL_BLEND_DST, &mSavedDst);
-		glBlendFunc(srcFunc, dstFunc);
-	}
-
-	~LLGLSBlendFunc(void) {
-		glBlendFunc(mSavedSrc, mSavedDst);
-	}
-};
-
-
 #endif
diff --git a/indra/llrender/llimagegl.cpp b/indra/llrender/llimagegl.cpp
index d4ffd6f88e..d408077c68 100644
--- a/indra/llrender/llimagegl.cpp
+++ b/indra/llrender/llimagegl.cpp
@@ -1710,6 +1710,7 @@ void LLImageGL::analyzeAlpha(const void* data_in, U32 w, U32 h)
 				sample[asum/(16*4)] += 4;
 			}
 			
+			
 			rowstart += 2 * w * mAlphaStride;
 		}
 		length *= 2; // we sampled everything twice, essentially
diff --git a/indra/llrender/llrender.cpp b/indra/llrender/llrender.cpp
index 8eb160f4e7..49e10c4790 100644
--- a/indra/llrender/llrender.cpp
+++ b/indra/llrender/llrender.cpp
@@ -47,6 +47,7 @@ U32 LLRender::sUICalls = 0;
 U32 LLRender::sUIVerts = 0;
 
 static const U32 LL_NUM_TEXTURE_LAYERS = 16; 
+static const U32 LL_NUM_LIGHT_UNITS = 8;
 
 static GLenum sGLTextureType[] =
 {
@@ -747,6 +748,130 @@ void LLTexUnit::debugTextureUnit(void)
 	}
 }
 
+LLLightState::LLLightState(S32 index)
+: mIndex(index),
+  mEnabled(false),
+  mConstantAtten(1.f),
+  mLinearAtten(0.f),
+  mQuadraticAtten(0.f),
+  mSpotExponent(0.f),
+  mSpotCutoff(180.f)
+{
+	if (mIndex == 0)
+	{
+		mDiffuse.set(1,1,1,1);
+		mSpecular.set(1,1,1,1);
+	}
+
+	mAmbient.set(0,0,0,1);
+	mPosition.set(0,0,1,0);
+	mSpotDirection.set(0,0,-1);
+
+}
+
+void LLLightState::enable()
+{
+	if (!mEnabled)
+	{
+		glEnable(GL_LIGHT0+mIndex);
+		mEnabled = true;
+	}
+}
+
+void LLLightState::disable()
+{
+	if (mEnabled)
+	{
+		glDisable(GL_LIGHT0+mIndex);
+		mEnabled = false;
+	}
+}
+
+void LLLightState::setDiffuse(const LLColor4& diffuse)
+{
+	if (mDiffuse != diffuse)
+	{
+		mDiffuse = diffuse;
+		glLightfv(GL_LIGHT0+mIndex, GL_DIFFUSE, mDiffuse.mV);
+	}
+}
+
+void LLLightState::setAmbient(const LLColor4& ambient)
+{
+	if (mAmbient != ambient)
+	{
+		mAmbient = ambient;
+		glLightfv(GL_LIGHT0+mIndex, GL_AMBIENT, mAmbient.mV);
+	}
+}
+
+void LLLightState::setSpecular(const LLColor4& specular)
+{
+	if (mSpecular != specular)
+	{
+		mSpecular = specular;
+		glLightfv(GL_LIGHT0+mIndex, GL_SPECULAR, mSpecular.mV);
+	}
+}
+
+void LLLightState::setPosition(const LLVector4& position)
+{
+	//always set position because modelview matrix may have changed
+	mPosition = position;
+	glLightfv(GL_LIGHT0+mIndex, GL_POSITION, mPosition.mV);
+}
+
+void LLLightState::setConstantAttenuation(const F32& atten)
+{
+	if (mConstantAtten != atten)
+	{
+		mConstantAtten = atten;
+		glLightf(GL_LIGHT0+mIndex, GL_CONSTANT_ATTENUATION, atten);
+	}
+}
+
+void LLLightState::setLinearAttenuation(const F32& atten)
+{
+	if (mLinearAtten != atten)
+	{
+		mLinearAtten = atten;
+		glLightf(GL_LIGHT0+mIndex, GL_LINEAR_ATTENUATION, atten);
+	}
+}
+
+void LLLightState::setQuadraticAttenuation(const F32& atten)
+{
+	if (mQuadraticAtten != atten)
+	{
+		mQuadraticAtten = atten;
+		glLightf(GL_LIGHT0+mIndex, GL_QUADRATIC_ATTENUATION, atten);
+	}
+}
+
+void LLLightState::setSpotExponent(const F32& exponent)
+{
+	if (mSpotExponent != exponent)
+	{
+		mSpotExponent = exponent;
+		glLightf(GL_LIGHT0+mIndex, GL_SPOT_EXPONENT, exponent);
+	}
+}
+
+void LLLightState::setSpotCutoff(const F32& cutoff)
+{
+	if (mSpotCutoff != cutoff)
+	{
+		mSpotCutoff = cutoff;
+		glLightf(GL_LIGHT0+mIndex, GL_SPOT_CUTOFF, cutoff);
+	}
+}
+
+void LLLightState::setSpotDirection(const LLVector3& direction)
+{
+	//always set direction because modelview matrix may have changed
+	mSpotDirection = direction;
+	glLightfv(GL_LIGHT0+mIndex, GL_SPOT_DIRECTION, direction.mV);
+}
 
 LLRender::LLRender()
   : mDirty(false),
@@ -768,6 +893,11 @@ LLRender::LLRender()
 	}
 	mDummyTexUnit = new LLTexUnit(-1);
 
+	for (U32 i = 0; i < LL_NUM_LIGHT_UNITS; ++i)
+	{
+		mLightState.push_back(new LLLightState(i));
+	}
+
 	for (U32 i = 0; i < 4; i++)
 	{
 		mCurrColorMask[i] = true;
@@ -795,6 +925,12 @@ void LLRender::shutdown()
 	mTexUnits.clear();
 	delete mDummyTexUnit;
 	mDummyTexUnit = NULL;
+
+	for (U32 i = 0; i < mLightState.size(); ++i)
+	{
+		delete mLightState[i];
+	}
+	mLightState.clear();
 }
 
 void LLRender::refreshState(void)
@@ -898,7 +1034,7 @@ LLVector3 LLRender::getUITranslation()
 {
 	if (mUIOffset.empty())
 	{
-		return LLVector3::zero;
+		return LLVector3(0,0,0);
 	}
 	return mUIOffset.back();
 }
@@ -907,7 +1043,7 @@ LLVector3 LLRender::getUIScale()
 {
 	if (mUIScale.empty())
 	{
-		return LLVector3(1.f, 1.f, 1.f);
+		return LLVector3(1,1,1);
 	}
 	return mUIScale.back();
 }
@@ -932,15 +1068,21 @@ void LLRender::setColorMask(bool writeColorR, bool writeColorG, bool writeColorB
 {
 	flush();
 
-	mCurrColorMask[0] = writeColorR;
-	mCurrColorMask[1] = writeColorG;
-	mCurrColorMask[2] = writeColorB;
-	mCurrColorMask[3] = writeAlpha;
+	if (mCurrColorMask[0] != writeColorR ||
+		mCurrColorMask[1] != writeColorG ||
+		mCurrColorMask[2] != writeColorB ||
+		mCurrColorMask[3] != writeAlpha)
+	{
+		mCurrColorMask[0] = writeColorR;
+		mCurrColorMask[1] = writeColorG;
+		mCurrColorMask[2] = writeColorB;
+		mCurrColorMask[3] = writeAlpha;
 
-	glColorMask(writeColorR ? GL_TRUE : GL_FALSE, 
-				writeColorG ? GL_TRUE : GL_FALSE,
-				writeColorB ? GL_TRUE : GL_FALSE,
-				writeAlpha ? GL_TRUE : GL_FALSE);
+		glColorMask(writeColorR ? GL_TRUE : GL_FALSE, 
+					writeColorG ? GL_TRUE : GL_FALSE,
+					writeColorB ? GL_TRUE : GL_FALSE,
+					writeAlpha ? GL_TRUE : GL_FALSE);
+	}
 }
 
 void LLRender::setSceneBlendType(eBlendType type)
@@ -978,15 +1120,19 @@ void LLRender::setAlphaRejectSettings(eCompareFunc func, F32 value)
 {
 	flush();
 
-	mCurrAlphaFunc = func;
-	mCurrAlphaFuncVal = value;
-	if (func == CF_DEFAULT)
-	{
-		glAlphaFunc(GL_GREATER, 0.01f);
-	} 
-	else
+	if (mCurrAlphaFunc != func ||
+		mCurrAlphaFuncVal != value)
 	{
-		glAlphaFunc(sGLCompareFunc[func], value);
+		mCurrAlphaFunc = func;
+		mCurrAlphaFuncVal = value;
+		if (func == CF_DEFAULT)
+		{
+			glAlphaFunc(GL_GREATER, 0.01f);
+		} 
+		else
+		{
+			glAlphaFunc(sGLCompareFunc[func], value);
+		}
 	}
 }
 
@@ -1045,6 +1191,16 @@ LLTexUnit* LLRender::getTexUnit(U32 index)
 	}
 }
 
+LLLightState* LLRender::getLight(U32 index)
+{
+	if (index < mLightState.size())
+	{
+		return mLightState[index];
+	}
+	
+	return NULL;
+}
+
 bool LLRender::verifyTexUnitActive(U32 unitToVerify)
 {
 	if (mCurrTextureUnitIndex == unitToVerify)
diff --git a/indra/llrender/llrender.h b/indra/llrender/llrender.h
index 2767aa64a8..7ba14f7b40 100644
--- a/indra/llrender/llrender.h
+++ b/indra/llrender/llrender.h
@@ -37,6 +37,7 @@
 #include "v2math.h"
 #include "v3math.h"
 #include "v4coloru.h"
+#include "v4math.h"
 #include "llstrider.h"
 #include "llpointer.h"
 #include "llglheaders.h"
@@ -212,6 +213,41 @@ protected:
 	void setTextureCombiner(eTextureBlendOp op, eTextureBlendSrc src1, eTextureBlendSrc src2, bool isAlpha = false);
 };
 
+class LLLightState
+{
+public:
+	LLLightState(S32 index);
+
+	void enable();
+	void disable();
+	void setDiffuse(const LLColor4& diffuse);
+	void setAmbient(const LLColor4& ambient);
+	void setSpecular(const LLColor4& specular);
+	void setPosition(const LLVector4& position);
+	void setConstantAttenuation(const F32& atten);
+	void setLinearAttenuation(const F32& atten);
+	void setQuadraticAttenuation(const F32& atten);
+	void setSpotExponent(const F32& exponent);
+	void setSpotCutoff(const F32& cutoff);
+	void setSpotDirection(const LLVector3& direction);
+
+protected:
+	S32 mIndex;
+	bool mEnabled;
+	LLColor4 mDiffuse;
+	LLColor4 mAmbient;
+	LLColor4 mSpecular;
+	LLVector4 mPosition;
+	LLVector3 mSpotDirection;
+
+	F32 mConstantAtten;
+	F32 mLinearAtten;
+	F32 mQuadraticAtten;
+
+	F32 mSpotExponent;
+	F32 mSpotCutoff;
+};
+
 class LLRender
 {
 	friend class LLTexUnit;
@@ -327,6 +363,8 @@ public:
 	void blendFunc(eBlendFactor color_sfactor, eBlendFactor color_dfactor,
 		       eBlendFactor alpha_sfactor, eBlendFactor alpha_dfactor);
 
+	LLLightState* getLight(U32 index);
+
 	LLTexUnit* getTexUnit(U32 index);
 
 	U32	getCurrentTexUnitIndex(void) const { return mCurrTextureUnitIndex; }
@@ -363,6 +401,7 @@ private:
 	LLStrider<LLColor4U>		mColorsp;
 	std::vector<LLTexUnit*>		mTexUnits;
 	LLTexUnit*			mDummyTexUnit;
+	std::vector<LLLightState*> mLightState;
 
 	eBlendFactor mCurrBlendColorSFactor;
 	eBlendFactor mCurrBlendColorDFactor;
diff --git a/indra/llrender/llrendertarget.cpp b/indra/llrender/llrendertarget.cpp
index 7205210fcc..cd2556d435 100644
--- a/indra/llrender/llrendertarget.cpp
+++ b/indra/llrender/llrendertarget.cpp
@@ -38,10 +38,10 @@ void check_framebuffer_status()
 {
 	if (gDebugGL)
 	{
-		GLenum status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
+		GLenum status = glCheckFramebufferStatus(GL_DRAW_FRAMEBUFFER);
 		switch (status)
 		{
-		case GL_FRAMEBUFFER_COMPLETE_EXT:
+		case GL_FRAMEBUFFER_COMPLETE:
 			break;
 		default:
 			ll_fail("check_framebuffer_status failed");	
@@ -50,7 +50,7 @@ void check_framebuffer_status()
 	}
 }
 
-BOOL LLRenderTarget::sUseFBO = FALSE;
+bool LLRenderTarget::sUseFBO = false;
 
 LLRenderTarget::LLRenderTarget() :
 	mResX(0),
@@ -59,8 +59,8 @@ LLRenderTarget::LLRenderTarget() :
 	mFBO(0),
 	mDepth(0),
 	mStencil(0),
-	mUseDepth(FALSE),
-	mRenderDepth(FALSE),
+	mUseDepth(false),
+	mRenderDepth(false),
 	mUsage(LLTexUnit::TT_TEXTURE),
 	mSamples(0),
 	mSampleBuffer(NULL)
@@ -78,7 +78,7 @@ void LLRenderTarget::setSampleBuffer(LLMultisampleBuffer* buffer)
 	mSampleBuffer = buffer;
 }
 
-void LLRenderTarget::allocate(U32 resx, U32 resy, U32 color_fmt, BOOL depth, BOOL stencil, LLTexUnit::eTextureType usage, BOOL use_fbo)
+void LLRenderTarget::allocate(U32 resx, U32 resy, U32 color_fmt, bool depth, bool stencil, LLTexUnit::eTextureType usage, bool use_fbo)
 {
 	stop_glerror();
 	mResX = resx;
@@ -99,24 +99,24 @@ void LLRenderTarget::allocate(U32 resx, U32 resy, U32 color_fmt, BOOL depth, BOO
 			stop_glerror();
 		}
 
-		glGenFramebuffersEXT(1, (GLuint *) &mFBO);
+		glGenFramebuffers(1, (GLuint *) &mFBO);
 
 		if (mDepth)
 		{
-			glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, mFBO);
+			glBindFramebuffer(GL_FRAMEBUFFER, mFBO);
 			if (mStencil)
 			{
-				glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, mDepth);
+				glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, mDepth);
 				stop_glerror();
-				glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_STENCIL_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, mDepth);
+				glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER, mDepth);
 				stop_glerror();
 			}
 			else
 			{
-				glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, LLTexUnit::getInternalType(mUsage), mDepth, 0);
+				glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, LLTexUnit::getInternalType(mUsage), mDepth, 0);
 				stop_glerror();
 			}
-			glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
+			glBindFramebuffer(GL_FRAMEBUFFER, 0);
 		}
 		
 		stop_glerror();
@@ -168,14 +168,14 @@ void LLRenderTarget::addColorAttachment(U32 color_fmt)
 	}
 	if (mFBO)
 	{
-		glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, mFBO);
-		glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT+offset,
+		glBindFramebuffer(GL_FRAMEBUFFER, mFBO);
+		glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0+offset,
 			LLTexUnit::getInternalType(mUsage), tex, 0);
 			stop_glerror();
 
 		check_framebuffer_status();
 		
-		glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
+		glBindFramebuffer(GL_FRAMEBUFFER, 0);
 	}
 
 	mTex.push_back(tex);
@@ -187,10 +187,10 @@ void LLRenderTarget::allocateDepth()
 	if (mStencil)
 	{
 		//use render buffers where stencil buffers are in play
-		glGenRenderbuffersEXT(1, (GLuint *) &mDepth);
-		glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, mDepth);
-		glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_DEPTH24_STENCIL8_EXT, mResX, mResY);
-		glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, 0);
+		glGenRenderbuffers(1, (GLuint *) &mDepth);
+		glBindRenderbuffer(GL_RENDERBUFFER, mDepth);
+		glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, mResX, mResY);
+		glBindRenderbuffer(GL_RENDERBUFFER, 0);
 	}
 	else
 	{
@@ -198,7 +198,7 @@ void LLRenderTarget::allocateDepth()
 		gGL.getTexUnit(0)->bindManual(mUsage, mDepth);
 		U32 internal_type = LLTexUnit::getInternalType(mUsage);
 		gGL.getTexUnit(0)->setTextureFilteringOption(LLTexUnit::TFO_POINT);
-		LLImageGL::setManualImage(internal_type, 0, GL_DEPTH_COMPONENT32_ARB, mResX, mResY, GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, NULL);
+		LLImageGL::setManualImage(internal_type, 0, GL_DEPTH_COMPONENT32, mResX, mResY, GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, NULL);
 	}
 }
 
@@ -209,54 +209,48 @@ void LLRenderTarget::shareDepthBuffer(LLRenderTarget& target)
 		llerrs << "Cannot share depth buffer between non FBO render targets." << llendl;
 	}
 
+	if (target.mDepth)
+	{
+		llerrs << "Attempting to override existing depth buffer.  Detach existing buffer first." << llendl;
+	}
+
+	if (target.mUseDepth)
+	{
+		llerrs << "Attempting to override existing shared depth buffer. Detach existing buffer first." << llendl;
+	}
+
 	if (mDepth)
 	{
 		stop_glerror();
-		glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, target.mFBO);
+		glBindFramebuffer(GL_FRAMEBUFFER, target.mFBO);
 		stop_glerror();
 
 		if (mStencil)
 		{
-			glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, mDepth);
+			glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, mDepth);
 			stop_glerror();
-			glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_STENCIL_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, mDepth);			
+			glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER, mDepth);			
 			stop_glerror();
+			target.mStencil = true;
 		}
 		else
 		{
-			glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, LLTexUnit::getInternalType(mUsage), mDepth, 0);
+			glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, LLTexUnit::getInternalType(mUsage), mDepth, 0);
 			stop_glerror();
-			if (mStencil)
-			{
-				glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_STENCIL_ATTACHMENT_EXT, LLTexUnit::getInternalType(mUsage), mDepth, 0);
-				stop_glerror();
-			}
 		}
-		glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
+		glBindFramebuffer(GL_FRAMEBUFFER, 0);
 
-		target.mUseDepth = TRUE;
+		target.mUseDepth = true;
 	}
 }
 
 void LLRenderTarget::release()
 {
-	if (mFBO)
-	{
-		glDeleteFramebuffersEXT(1, (GLuint *) &mFBO);
-		mFBO = 0;
-	}
-
-	if (mTex.size() > 0)
-	{
-		LLImageGL::deleteTextures(mTex.size(), &mTex[0]);
-		mTex.clear();
-	}
-
 	if (mDepth)
 	{
 		if (mStencil)
 		{
-			glDeleteRenderbuffersEXT(1, (GLuint*) &mDepth);
+			glDeleteRenderbuffers(1, (GLuint*) &mDepth);
 			stop_glerror();
 		}
 		else
@@ -266,6 +260,33 @@ void LLRenderTarget::release()
 		}
 		mDepth = 0;
 	}
+	else if (mUseDepth && mFBO)
+	{ //detach shared depth buffer
+		glBindFramebuffer(GL_FRAMEBUFFER, mFBO);
+		if (mStencil)
+		{ //attached as a renderbuffer
+			glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, 0);
+			glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER, 0);
+			mStencil = false;
+		}
+		else
+		{ //attached as a texture
+			glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, LLTexUnit::getInternalType(mUsage), 0, 0);
+		}
+		mUseDepth = false;
+	}
+
+	if (mFBO)
+	{
+		glDeleteFramebuffers(1, (GLuint *) &mFBO);
+		mFBO = 0;
+	}
+
+	if (mTex.size() > 0)
+	{
+		LLImageGL::deleteTextures(mTex.size(), &mTex[0]);
+		mTex.clear();
+	}
 
 	mSampleBuffer = NULL;
 	sBoundTarget = NULL;
@@ -283,14 +304,14 @@ void LLRenderTarget::bindTarget()
 		}
 		else
 		{
-			glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, mFBO);
+			glBindFramebuffer(GL_FRAMEBUFFER, mFBO);
 			stop_glerror();
 			if (gGLManager.mHasDrawBuffers)
 			{ //setup multiple render targets
-				GLenum drawbuffers[] = {GL_COLOR_ATTACHMENT0_EXT,
-										GL_COLOR_ATTACHMENT1_EXT,
-										GL_COLOR_ATTACHMENT2_EXT,
-										GL_COLOR_ATTACHMENT3_EXT};
+				GLenum drawbuffers[] = {GL_COLOR_ATTACHMENT0,
+										GL_COLOR_ATTACHMENT1,
+										GL_COLOR_ATTACHMENT2,
+										GL_COLOR_ATTACHMENT3};
 				glDrawBuffersARB(mTex.size(), drawbuffers);
 			}
 			
@@ -315,7 +336,7 @@ void LLRenderTarget::unbindTarget()
 {
 	if (gGLManager.mHasFramebufferObject)
 	{
-		glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
+		glBindFramebuffer(GL_FRAMEBUFFER, 0);
 	}
 	sBoundTarget = NULL;
 }
@@ -349,19 +370,19 @@ U32 LLRenderTarget::getTexture(U32 attachment) const
 	{
 		llerrs << "Invalid attachment index." << llendl;
 	}
+	if (mTex.empty())
+	{
+		return 0;
+	}
 	return mTex[attachment];
 }
 
 void LLRenderTarget::bindTexture(U32 index, S32 channel)
 {
-	if (index > mTex.size()-1)
-	{
-		llerrs << "Invalid attachment index." << llendl;
-	}
-	gGL.getTexUnit(channel)->bindManual(mUsage, mTex[index]);
+	gGL.getTexUnit(channel)->bindManual(mUsage, getTexture(index));
 }
 
-void LLRenderTarget::flush(BOOL fetch_depth)
+void LLRenderTarget::flush(bool fetch_depth)
 {
 	gGL.flush();
 	if (!mFBO)
@@ -377,7 +398,7 @@ void LLRenderTarget::flush(BOOL fetch_depth)
 			}
 
 			gGL.getTexUnit(0)->bind(this);
-			glCopyTexImage2D(LLTexUnit::getInternalType(mUsage), 0, GL_DEPTH24_STENCIL8_EXT, 0, 0, mResX, mResY, 0);
+			glCopyTexImage2D(LLTexUnit::getInternalType(mUsage), 0, GL_DEPTH24_STENCIL8, 0, 0, mResX, mResY, 0);
 		}
 
 		gGL.getTexUnit(0)->disable();
@@ -386,55 +407,59 @@ void LLRenderTarget::flush(BOOL fetch_depth)
 	{
 		stop_glerror();
 
-		glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
+		glBindFramebuffer(GL_FRAMEBUFFER, 0);
 
 		stop_glerror();
 	
 		if (mSampleBuffer)
 		{
-			LLGLEnable multisample(GL_MULTISAMPLE_ARB);
+			LLGLEnable multisample(GL_MULTISAMPLE);
 			stop_glerror();
-			glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, mFBO);
+			glBindFramebuffer(GL_FRAMEBUFFER, mFBO);
 			stop_glerror();
 			check_framebuffer_status();
-			glBindFramebufferEXT(GL_READ_FRAMEBUFFER_EXT, mSampleBuffer->mFBO);
+			glBindFramebuffer(GL_READ_FRAMEBUFFER, mSampleBuffer->mFBO);
 			check_framebuffer_status();
 			
 			stop_glerror();
-			glBlitFramebufferEXT(0, 0, mResX, mResY, 0, 0, mResX, mResY, GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT, GL_NEAREST);
+			glBlitFramebuffer(0, 0, mResX, mResY, 0, 0, mResX, mResY, GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT, GL_NEAREST);
 			stop_glerror();		
 
 			if (mTex.size() > 1)
 			{		
 				for (U32 i = 1; i < mTex.size(); ++i)
 				{
-					glFramebufferTexture2DEXT(GL_DRAW_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
+					glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
 										LLTexUnit::getInternalType(mUsage), mTex[i], 0);
 					stop_glerror();
-					glFramebufferRenderbufferEXT(GL_READ_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_RENDERBUFFER_EXT, mSampleBuffer->mTex[i]);
+					glFramebufferRenderbuffer(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, mSampleBuffer->mTex[i]);
 					stop_glerror();
-					glBlitFramebufferEXT(0, 0, mResX, mResY, 0, 0, mResX, mResY, GL_COLOR_BUFFER_BIT, GL_NEAREST);		
+					glBlitFramebuffer(0, 0, mResX, mResY, 0, 0, mResX, mResY, GL_COLOR_BUFFER_BIT, GL_NEAREST);		
 					stop_glerror();
 				}
 
 				for (U32 i = 0; i < mTex.size(); ++i)
 				{
-					glFramebufferTexture2DEXT(GL_DRAW_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT+i,
+					glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0+i,
 										LLTexUnit::getInternalType(mUsage), mTex[i], 0);
 					stop_glerror();
-					glFramebufferRenderbufferEXT(GL_READ_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT+i, GL_RENDERBUFFER_EXT, mSampleBuffer->mTex[i]);
+					glFramebufferRenderbuffer(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT0+i, GL_RENDERBUFFER, mSampleBuffer->mTex[i]);
 					stop_glerror();
 				}
 			}
 		}
 
-		glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
+		glBindFramebuffer(GL_FRAMEBUFFER, 0);
 	}
 }
 
 void LLRenderTarget::copyContents(LLRenderTarget& source, S32 srcX0, S32 srcY0, S32 srcX1, S32 srcY1,
 						S32 dstX0, S32 dstY0, S32 dstX1, S32 dstY1, U32 mask, U32 filter)
 {
+	GLboolean write_depth = mask & GL_DEPTH_BUFFER_BIT ? TRUE : FALSE;
+
+	LLGLDepthTest depth(write_depth, write_depth);
+
 	gGL.flush();
 	if (!source.mFBO || !mFBO)
 	{
@@ -451,25 +476,25 @@ void LLRenderTarget::copyContents(LLRenderTarget& source, S32 srcX0, S32 srcY0,
 		{
 			stop_glerror();
 		
-			glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, source.mFBO);
+			glBindFramebuffer(GL_FRAMEBUFFER, source.mFBO);
 			gGL.getTexUnit(0)->bind(this, true);
 			stop_glerror();
 			glCopyTexSubImage2D(LLTexUnit::getInternalType(mUsage), 0, srcX0, srcY0, dstX0, dstY0, dstX1, dstY1);
 			stop_glerror();
-			glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
+			glBindFramebuffer(GL_FRAMEBUFFER, 0);
 			stop_glerror();
 		}
 		else
 		{
-			glBindFramebufferEXT(GL_READ_FRAMEBUFFER_EXT, source.mFBO);
+			glBindFramebuffer(GL_READ_FRAMEBUFFER, source.mFBO);
 			stop_glerror();
-			glBindFramebufferEXT(GL_DRAW_FRAMEBUFFER_EXT, mFBO);
+			glBindFramebuffer(GL_DRAW_FRAMEBUFFER, mFBO);
 			stop_glerror();
 			check_framebuffer_status();
 			stop_glerror();
-			glBlitFramebufferEXT(srcX0, srcY0, srcX1, srcY1, dstX0, dstY0, dstX1, dstY1, mask, filter);
+			glBlitFramebuffer(srcX0, srcY0, srcX1, srcY1, dstX0, dstY0, dstX1, dstY1, mask, filter);
 			stop_glerror();
-			glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
+			glBindFramebuffer(GL_FRAMEBUFFER, 0);
 			stop_glerror();
 		}
 	}
@@ -484,22 +509,26 @@ void LLRenderTarget::copyContentsToFramebuffer(LLRenderTarget& source, S32 srcX0
 		llerrs << "Cannot copy framebuffer contents for non FBO render targets." << llendl;
 	}
 	{
-		glBindFramebufferEXT(GL_READ_FRAMEBUFFER_EXT, source.mFBO);
+		GLboolean write_depth = mask & GL_DEPTH_BUFFER_BIT ? TRUE : FALSE;
+
+		LLGLDepthTest depth(write_depth, write_depth);
+		
+		glBindFramebuffer(GL_READ_FRAMEBUFFER, source.mFBO);
 		stop_glerror();
-		glBindFramebufferEXT(GL_DRAW_FRAMEBUFFER_EXT, 0);
+		glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
 		stop_glerror();
 		check_framebuffer_status();
 		stop_glerror();
-		glBlitFramebufferEXT(srcX0, srcY0, srcX1, srcY1, dstX0, dstY0, dstX1, dstY1, mask, filter);
+		glBlitFramebuffer(srcX0, srcY0, srcX1, srcY1, dstX0, dstY0, dstX1, dstY1, mask, filter);
 		stop_glerror();
-		glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
+		glBindFramebuffer(GL_FRAMEBUFFER, 0);
 		stop_glerror();
 	}
 }
 
-BOOL LLRenderTarget::isComplete() const
+bool LLRenderTarget::isComplete() const
 {
-	return (!mTex.empty() || mDepth) ? TRUE : FALSE;
+	return (!mTex.empty() || mDepth) ? true : false;
 }
 
 void LLRenderTarget::getViewport(S32* viewport)
@@ -520,26 +549,26 @@ LLMultisampleBuffer::LLMultisampleBuffer()
 
 LLMultisampleBuffer::~LLMultisampleBuffer()
 {
-	releaseSampleBuffer();
+	release();
 }
 
-void LLMultisampleBuffer::releaseSampleBuffer()
+void LLMultisampleBuffer::release()
 {
 	if (mFBO)
 	{
-		glDeleteFramebuffersEXT(1, (GLuint *) &mFBO);
+		glDeleteFramebuffers(1, (GLuint *) &mFBO);
 		mFBO = 0;
 	}
 
 	if (mTex.size() > 0)
 	{
-		glDeleteRenderbuffersEXT(mTex.size(), (GLuint *) &mTex[0]);
+		glDeleteRenderbuffers(mTex.size(), (GLuint *) &mTex[0]);
 		mTex.clear();
 	}
 
 	if (mDepth)
 	{
-		glDeleteRenderbuffersEXT(1, (GLuint *) &mDepth);
+		glDeleteRenderbuffers(1, (GLuint *) &mDepth);
 		mDepth = 0;
 	}
 }
@@ -556,13 +585,13 @@ void LLMultisampleBuffer::bindTarget(LLRenderTarget* ref)
 		ref = this;
 	}
 
-	glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, mFBO);
+	glBindFramebuffer(GL_FRAMEBUFFER, mFBO);
 	if (gGLManager.mHasDrawBuffers)
 	{ //setup multiple render targets
-		GLenum drawbuffers[] = {GL_COLOR_ATTACHMENT0_EXT,
-								GL_COLOR_ATTACHMENT1_EXT,
-								GL_COLOR_ATTACHMENT2_EXT,
-								GL_COLOR_ATTACHMENT3_EXT};
+		GLenum drawbuffers[] = {GL_COLOR_ATTACHMENT0,
+								GL_COLOR_ATTACHMENT1,
+								GL_COLOR_ATTACHMENT2,
+								GL_COLOR_ATTACHMENT3};
 		glDrawBuffersARB(ref->mTex.size(), drawbuffers);
 	}
 
@@ -573,12 +602,12 @@ void LLMultisampleBuffer::bindTarget(LLRenderTarget* ref)
 	sBoundTarget = this;
 }
 
-void LLMultisampleBuffer::allocate(U32 resx, U32 resy, U32 color_fmt, BOOL depth, BOOL stencil,  LLTexUnit::eTextureType usage, BOOL use_fbo )
+void LLMultisampleBuffer::allocate(U32 resx, U32 resy, U32 color_fmt, bool depth, bool stencil,  LLTexUnit::eTextureType usage, bool use_fbo )
 {
 	allocate(resx,resy,color_fmt,depth,stencil,usage,use_fbo,2);
 }
 
-void LLMultisampleBuffer::allocate(U32 resx, U32 resy, U32 color_fmt, BOOL depth, BOOL stencil,  LLTexUnit::eTextureType usage, BOOL use_fbo, U32 samples )
+void LLMultisampleBuffer::allocate(U32 resx, U32 resy, U32 color_fmt, bool depth, bool stencil,  LLTexUnit::eTextureType usage, bool use_fbo, U32 samples )
 {
 	stop_glerror();
 	mResX = resx;
@@ -588,12 +617,7 @@ void LLMultisampleBuffer::allocate(U32 resx, U32 resy, U32 color_fmt, BOOL depth
 	mUseDepth = depth;
 	mStencil = stencil;
 
-	releaseSampleBuffer();
-
-	if (!gGLManager.mHasFramebufferMultisample)
-	{
-		llerrs << "Attempting to allocate unsupported render target type!" << llendl;
-	}
+	release();
 
 	mSamples = samples;
 	
@@ -614,23 +638,21 @@ void LLMultisampleBuffer::allocate(U32 resx, U32 resy, U32 color_fmt, BOOL depth
 			stop_glerror();
 		}
 
-		glGenFramebuffersEXT(1, (GLuint *) &mFBO);
+		glGenFramebuffers(1, (GLuint *) &mFBO);
 
-		glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, mFBO);
+		glBindFramebuffer(GL_FRAMEBUFFER, mFBO);
 
 		if (mDepth)
 		{
-			glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, mDepth);
+			glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, mDepth);
 			if (mStencil)
 			{
-				glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_STENCIL_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, mDepth);			
+				glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER, mDepth);			
 			}
-			glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
 		}
-		
+	
 		stop_glerror();
-
-		glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
+		glBindFramebuffer(GL_FRAMEBUFFER, 0);
 		stop_glerror();
 	}
 
@@ -652,30 +674,28 @@ void LLMultisampleBuffer::addColorAttachment(U32 color_fmt)
 	}
 
 	U32 tex;
-	glGenRenderbuffersEXT(1, &tex);
+	glGenRenderbuffers(1, &tex);
 	
-	glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, tex);
-	glRenderbufferStorageMultisampleEXT(GL_RENDERBUFFER_EXT, mSamples, color_fmt, mResX, mResY);
+	glBindRenderbuffer(GL_RENDERBUFFER, tex);
+	glRenderbufferStorageMultisample(GL_RENDERBUFFER, mSamples, color_fmt, mResX, mResY);
 	stop_glerror();
 
 	if (mFBO)
 	{
-		glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, mFBO);
-		glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT+offset, GL_RENDERBUFFER_EXT, tex);
+		glBindFramebuffer(GL_FRAMEBUFFER, mFBO);
+		glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0+offset, GL_RENDERBUFFER, tex);
 		stop_glerror();
-		GLenum status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
+		GLenum status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
 		switch (status)
 		{
-		case GL_FRAMEBUFFER_COMPLETE_EXT:
-			break;
-		case GL_FRAMEBUFFER_UNSUPPORTED_EXT:
-			llerrs << "WTF?" << llendl;
+		case GL_FRAMEBUFFER_COMPLETE:
 			break;
 		default:
-			llerrs << "WTF?" << llendl;
+			llerrs << "WTF? " << std::hex << status << llendl;
+			break;
 		}
 
-		glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
+		glBindFramebuffer(GL_FRAMEBUFFER, 0);
 	}
 
 	mTex.push_back(tex);
@@ -683,15 +703,15 @@ void LLMultisampleBuffer::addColorAttachment(U32 color_fmt)
 
 void LLMultisampleBuffer::allocateDepth()
 {
-	glGenRenderbuffersEXT(1, (GLuint* ) &mDepth);
-	glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, mDepth);
+	glGenRenderbuffers(1, (GLuint* ) &mDepth);
+	glBindRenderbuffer(GL_RENDERBUFFER, mDepth);
 	if (mStencil)
 	{
-		glRenderbufferStorageMultisampleEXT(GL_RENDERBUFFER_EXT, mSamples, GL_DEPTH24_STENCIL8_EXT, mResX, mResY);	
+		glRenderbufferStorageMultisample(GL_RENDERBUFFER, mSamples, GL_DEPTH24_STENCIL8, mResX, mResY);	
 	}
 	else
 	{
-		glRenderbufferStorageMultisampleEXT(GL_RENDERBUFFER_EXT, mSamples, GL_DEPTH_COMPONENT16_ARB, mResX, mResY);	
+		glRenderbufferStorageMultisample(GL_RENDERBUFFER, mSamples, GL_DEPTH_COMPONENT16, mResX, mResY);	
 	}
 }
 
diff --git a/indra/llrender/llrendertarget.h b/indra/llrender/llrendertarget.h
index ae8613d9be..12dd1c8b90 100644
--- a/indra/llrender/llrendertarget.h
+++ b/indra/llrender/llrendertarget.h
@@ -63,7 +63,7 @@ class LLRenderTarget
 {
 public:
 	//whether or not to use FBO implementation
-	static BOOL sUseFBO; 
+	static bool sUseFBO; 
 
 	LLRenderTarget();
 	virtual ~LLRenderTarget();
@@ -71,7 +71,7 @@ public:
 	//allocate resources for rendering
 	//must be called before use
 	//multiple calls will release previously allocated resources
-	void allocate(U32 resx, U32 resy, U32 color_fmt, BOOL depth, BOOL stencil, LLTexUnit::eTextureType usage = LLTexUnit::TT_TEXTURE, BOOL use_fbo = FALSE);
+	void allocate(U32 resx, U32 resy, U32 color_fmt, bool depth, bool stencil, LLTexUnit::eTextureType usage = LLTexUnit::TT_TEXTURE, bool use_fbo = FALSE);
 
 	//provide this render target with a multisample resource.
 	void setSampleBuffer(LLMultisampleBuffer* buffer);
@@ -88,7 +88,7 @@ public:
 
 	//free any allocated resources
 	//safe to call redundantly
-	void release();
+	virtual void release();
 
 	//bind target for rendering
 	//applies appropriate viewport
@@ -115,7 +115,7 @@ public:
 	U32 getTexture(U32 attachment = 0) const;
 
 	U32 getDepth(void) const { return mDepth; }
-	BOOL hasStencil() const { return mStencil; }
+	bool hasStencil() const { return mStencil; }
 
 	void bindTexture(U32 index, S32 channel);
 
@@ -125,7 +125,7 @@ public:
 	// call bindTarget once, do all your rendering, call flush once
 	// if fetch_depth is TRUE, every effort will be made to copy the depth buffer into 
 	// the current depth texture.  A depth texture will be allocated if needed.
-	void flush(BOOL fetch_depth = FALSE);
+	void flush(bool fetch_depth = FALSE);
 
 	void copyContents(LLRenderTarget& source, S32 srcX0, S32 srcY0, S32 srcX1, S32 srcY1,
 						S32 dstX0, S32 dstY0, S32 dstX1, S32 dstY1, U32 mask, U32 filter);
@@ -136,7 +136,7 @@ public:
 	//Returns TRUE if target is ready to be rendered into.
 	//That is, if the target has been allocated with at least
 	//one renderable attachment (i.e. color buffer, depth buffer).
-	BOOL isComplete() const;
+	bool isComplete() const;
 
 	static LLRenderTarget* getCurrentBoundTarget() { return sBoundTarget; }
 
@@ -147,9 +147,9 @@ protected:
 	std::vector<U32> mTex;
 	U32 mFBO;
 	U32 mDepth;
-	BOOL mStencil;
-	BOOL mUseDepth;
-	BOOL mRenderDepth;
+	bool mStencil;
+	bool mUseDepth;
+	bool mRenderDepth;
 	LLTexUnit::eTextureType mUsage;
 	U32 mSamples;
 	LLMultisampleBuffer* mSampleBuffer;
@@ -164,12 +164,12 @@ public:
 	LLMultisampleBuffer();
 	virtual ~LLMultisampleBuffer();
 
-	void releaseSampleBuffer();
+	virtual void release();
 
 	virtual void bindTarget();
 	void bindTarget(LLRenderTarget* ref);
-	virtual void allocate(U32 resx, U32 resy, U32 color_fmt, BOOL depth, BOOL stencil, LLTexUnit::eTextureType usage, BOOL use_fbo);
-	void allocate(U32 resx, U32 resy, U32 color_fmt, BOOL depth, BOOL stencil, LLTexUnit::eTextureType usage, BOOL use_fbo, U32 samples);
+	virtual void allocate(U32 resx, U32 resy, U32 color_fmt, bool depth, bool stencil, LLTexUnit::eTextureType usage, bool use_fbo);
+	void allocate(U32 resx, U32 resy, U32 color_fmt, bool depth, bool stencil, LLTexUnit::eTextureType usage, bool use_fbo, U32 samples);
 	virtual void addColorAttachment(U32 color_fmt);
 	virtual void allocateDepth();
 };
diff --git a/indra/llrender/llshadermgr.cpp b/indra/llrender/llshadermgr.cpp
index c859d41e17..98a0a93084 100644
--- a/indra/llrender/llshadermgr.cpp
+++ b/indra/llrender/llshadermgr.cpp
@@ -146,6 +146,14 @@ BOOL LLShaderMgr::attachShaderFeatures(LLGLSLShader * shader)
 			return FALSE;
 		}
 	}
+
+	if (features->hasObjectSkinning)
+	{
+		if (!shader->attachObject("avatar/objectSkinV.glsl"))
+		{
+			return FALSE;
+		}
+	}
 	
 	///////////////////////////////////////
 	// Attach Fragment Shader Features Next
@@ -220,7 +228,14 @@ BOOL LLShaderMgr::attachShaderFeatures(LLGLSLShader * shader)
 	else if (features->isFullbright)
 	{
 	
-		if (features->hasWaterFog)
+		if (features->isShiny && features->hasWaterFog)
+		{
+			if (!shader->attachObject("lighting/lightFullbrightShinyWaterF.glsl"))
+			{
+				return FALSE;
+			}
+		}
+		else if (features->hasWaterFog)
 		{
 			if (!shader->attachObject("lighting/lightFullbrightWaterF.glsl"))
 			{
@@ -300,18 +315,21 @@ void LLShaderMgr::dumpObjectLog(GLhandleARB ret, BOOL warns)
 		}
 		else
 		{
-			LL_DEBUGS("ShaderLoading") << log << LL_ENDL;
+			LL_INFOS("ShaderLoading") << log << LL_ENDL;
 		}
 	}
 }
 
 GLhandleARB LLShaderMgr::loadShaderFile(const std::string& filename, S32 & shader_level, GLenum type)
 {
-	GLenum error;
-	error = glGetError();
-	if (error != GL_NO_ERROR)
+	GLenum error = GL_NO_ERROR;
+	if (gDebugGL)
 	{
-		LL_WARNS("ShaderLoading") << "GL ERROR entering loadShaderFile(): " << error << LL_ENDL;
+		error = glGetError();
+		if (error != GL_NO_ERROR)
+		{
+			LL_WARNS("ShaderLoading") << "GL ERROR entering loadShaderFile(): " << error << LL_ENDL;
+		}
 	}
 	
 	LL_DEBUGS("ShaderLoading") << "Loading shader file: " << filename << " class " << shader_level << LL_ENDL;
@@ -366,31 +384,39 @@ GLhandleARB LLShaderMgr::loadShaderFile(const std::string& filename, S32 & shade
 
 	//create shader object
 	GLhandleARB ret = glCreateShaderObjectARB(type);
-	error = glGetError();
-	if (error != GL_NO_ERROR)
+	if (gDebugGL)
 	{
-		LL_WARNS("ShaderLoading") << "GL ERROR in glCreateShaderObjectARB: " << error << LL_ENDL;
+		error = glGetError();
+		if (error != GL_NO_ERROR)
+		{
+			LL_WARNS("ShaderLoading") << "GL ERROR in glCreateShaderObjectARB: " << error << LL_ENDL;
+		}
 	}
-	else
+	
+	//load source
+	glShaderSourceARB(ret, count, (const GLcharARB**) text, NULL);
+
+	if (gDebugGL)
 	{
-		//load source
-		glShaderSourceARB(ret, count, (const GLcharARB**) text, NULL);
 		error = glGetError();
 		if (error != GL_NO_ERROR)
 		{
 			LL_WARNS("ShaderLoading") << "GL ERROR in glShaderSourceARB: " << error << LL_ENDL;
 		}
-		else
+	}
+
+	//compile source
+	glCompileShaderARB(ret);
+
+	if (gDebugGL)
+	{
+		error = glGetError();
+		if (error != GL_NO_ERROR)
 		{
-			//compile source
-			glCompileShaderARB(ret);
-			error = glGetError();
-			if (error != GL_NO_ERROR)
-			{
-				LL_WARNS("ShaderLoading") << "GL ERROR in glCompileShaderARB: " << error << LL_ENDL;
-			}
+			LL_WARNS("ShaderLoading") << "GL ERROR in glCompileShaderARB: " << error << LL_ENDL;
 		}
 	}
+		
 	//free memory
 	for (GLuint i = 0; i < count; i++)
 	{
@@ -401,13 +427,16 @@ GLhandleARB LLShaderMgr::loadShaderFile(const std::string& filename, S32 & shade
 		//check for errors
 		GLint success = GL_TRUE;
 		glGetObjectParameterivARB(ret, GL_OBJECT_COMPILE_STATUS_ARB, &success);
-		error = glGetError();
-		if (error != GL_NO_ERROR || success == GL_FALSE) 
+		if (gDebugGL || success == GL_FALSE)
 		{
-			//an error occured, print log
-			LL_WARNS("ShaderLoading") << "GLSL Compilation Error: (" << error << ") in " << filename << LL_ENDL;
-			dumpObjectLog(ret);
-			ret = 0;
+			error = glGetError();
+			if (error != GL_NO_ERROR || success == GL_FALSE) 
+			{
+				//an error occured, print log
+				LL_WARNS("ShaderLoading") << "GLSL Compilation Error: (" << error << ") in " << filename << LL_ENDL;
+				dumpObjectLog(ret);
+				ret = 0;
+			}
 		}
 	}
 	else
diff --git a/indra/llrender/llvertexbuffer.cpp b/indra/llrender/llvertexbuffer.cpp
index 1a5a4f734d..8c9171ccf4 100644
--- a/indra/llrender/llvertexbuffer.cpp
+++ b/indra/llrender/llvertexbuffer.cpp
@@ -25,6 +25,7 @@
  */
 
 #include "linden_common.h"
+#include "llmemory.h"
 
 #include <boost/static_assert.hpp>
 #include "llsys.h"
@@ -33,6 +34,7 @@
 #include "llglheaders.h"
 #include "llmemtype.h"
 #include "llrender.h"
+#include "llvector4a.h"
 
 //============================================================================
 
@@ -57,20 +59,24 @@ BOOL LLVertexBuffer::sIBOActive = FALSE;
 U32 LLVertexBuffer::sAllocatedBytes = 0;
 BOOL LLVertexBuffer::sMapped = FALSE;
 BOOL LLVertexBuffer::sUseStreamDraw = TRUE;
+BOOL LLVertexBuffer::sPreferStreamDraw = FALSE;
+S32	LLVertexBuffer::sWeight4Loc = -1;
 
 std::vector<U32> LLVertexBuffer::sDeleteList;
 
-S32 LLVertexBuffer::sTypeOffsets[LLVertexBuffer::TYPE_MAX] =
+
+S32 LLVertexBuffer::sTypeSize[LLVertexBuffer::TYPE_MAX] =
 {
-	sizeof(LLVector3), // TYPE_VERTEX,
-	sizeof(LLVector3), // TYPE_NORMAL,
+	sizeof(LLVector4), // TYPE_VERTEX,
+	sizeof(LLVector4), // TYPE_NORMAL,
 	sizeof(LLVector2), // TYPE_TEXCOORD0,
 	sizeof(LLVector2), // TYPE_TEXCOORD1,
 	sizeof(LLVector2), // TYPE_TEXCOORD2,
 	sizeof(LLVector2), // TYPE_TEXCOORD3,
 	sizeof(LLColor4U), // TYPE_COLOR,
-	sizeof(LLVector3), // TYPE_BINORMAL,
+	sizeof(LLVector4), // TYPE_BINORMAL,
 	sizeof(F32),	   // TYPE_WEIGHT,
+	sizeof(LLVector4), // TYPE_WEIGHT4,
 	sizeof(LLVector4), // TYPE_CLOTHWEIGHT,
 };
 
@@ -139,11 +145,11 @@ void LLVertexBuffer::setupClientArrays(U32 data_mask)
 			}
 			else 
 			{	//was disabled
-				if (data_mask & mask[i])
+				if (data_mask & mask[i] && i > 0)
 				{ //needs to be enabled
 					glEnableClientState(array[i]);
 				}
-				else if (gDebugGL && glIsEnabled(array[i]))
+				else if (gDebugGL && i > 0 && glIsEnabled(array[i]))
 				{ //needs to be disabled, make sure it was (DEBUG TEMPORARY)
 					if (gDebugSession)
 					{
@@ -205,18 +211,53 @@ void LLVertexBuffer::setupClientArrays(U32 data_mask)
 			glClientActiveTextureARB(GL_TEXTURE0_ARB);
 		}
 	
+		if (sLastMask & MAP_WEIGHT4)
+		{
+			if (sWeight4Loc < 0)
+			{
+				llerrs << "Weighting disabled but vertex buffer still bound!" << llendl;
+			}
+
+			if (!(data_mask & MAP_WEIGHT4))
+			{ //disable 4-component skin weight			
+				glDisableVertexAttribArrayARB(sWeight4Loc);
+			}
+		}
+		else if (data_mask & MAP_WEIGHT4)
+		{
+			if (sWeight4Loc >= 0)
+			{ //enable 4-component skin weight
+				glEnableVertexAttribArrayARB(sWeight4Loc);
+			}
+		}
+				
+
 		sLastMask = data_mask;
 	}
 }
 
-void LLVertexBuffer::drawRange(U32 mode, U32 start, U32 end, U32 count, U32 indices_offset) const
+//static
+void LLVertexBuffer::drawArrays(U32 mode, const std::vector<LLVector3>& pos, const std::vector<LLVector3>& norm)
 {
-	llassert(mRequestedNumVerts >= 0);
+	U32 count = pos.size();
+	llassert(norm.size() >= pos.size());
+
+	unbind();
+	
+	setupClientArrays(MAP_VERTEX | MAP_NORMAL);
+
+	glVertexPointer(3, GL_FLOAT, 0, pos[0].mV);
+	glNormalPointer(GL_FLOAT, 0, norm[0].mV);
+
+	glDrawArrays(sGLMode[mode], 0, count);
+}
 
+void LLVertexBuffer::validateRange(U32 start, U32 end, U32 count, U32 indices_offset) const
+{
 	if (start >= (U32) mRequestedNumVerts ||
 	    end >= (U32) mRequestedNumVerts)
 	{
-		llerrs << "Bad vertex buffer draw range: [" << start << ", " << end << "]" << llendl;
+		llerrs << "Bad vertex buffer draw range: [" << start << ", " << end << "] vs " << mRequestedNumVerts << llendl;
 	}
 
 	llassert(mRequestedNumIndices >= 0);
@@ -227,6 +268,25 @@ void LLVertexBuffer::drawRange(U32 mode, U32 start, U32 end, U32 count, U32 indi
 		llerrs << "Bad index buffer draw range: [" << indices_offset << ", " << indices_offset+count << "]" << llendl;
 	}
 
+	if (gDebugGL && !useVBOs())
+	{
+		U16* idx = ((U16*) getIndicesPointer())+indices_offset;
+		for (U32 i = 0; i < count; ++i)
+		{
+			if (idx[i] < start || idx[i] > end)
+			{
+				llerrs << "Index out of range: " << idx[i] << " not in [" << start << ", " << end << "]" << llendl;
+			}
+		}
+	}
+}
+
+void LLVertexBuffer::drawRange(U32 mode, U32 start, U32 end, U32 count, U32 indices_offset) const
+{
+	validateRange(start, end, count, indices_offset);
+
+	llassert(mRequestedNumVerts >= 0);
+
 	if (mGLIndices != sGLRenderIndices)
 	{
 		llerrs << "Wrong index buffer bound." << llendl;
@@ -243,16 +303,17 @@ void LLVertexBuffer::drawRange(U32 mode, U32 start, U32 end, U32 count, U32 indi
 		return;
 	}
 
+	U16* idx = ((U16*) getIndicesPointer())+indices_offset;
+
 	stop_glerror();
 	glDrawRangeElements(sGLMode[mode], start, end, count, GL_UNSIGNED_SHORT, 
-		((U16*) getIndicesPointer()) + indices_offset);
+		idx);
 	stop_glerror();
 }
 
 void LLVertexBuffer::draw(U32 mode, U32 count, U32 indices_offset) const
 {
 	llassert(mRequestedNumIndices >= 0);
-
 	if (indices_offset >= (U32) mRequestedNumIndices ||
 	    indices_offset + count > (U32) mRequestedNumIndices)
 	{
@@ -284,7 +345,6 @@ void LLVertexBuffer::draw(U32 mode, U32 count, U32 indices_offset) const
 void LLVertexBuffer::drawArrays(U32 mode, U32 first, U32 count) const
 {
 	llassert(mRequestedNumVerts >= 0);
-
 	if (first >= (U32) mRequestedNumVerts ||
 	    first + count > (U32) mRequestedNumVerts)
 	{
@@ -351,6 +411,8 @@ void LLVertexBuffer::cleanupClass()
 	LLMemType mt2(LLMemType::MTYPE_VERTEX_CLEANUP_CLASS);
 	unbind();
 	clientCopy(); // deletes GL buffers
+
+	//llassert_always(!sCount) ;
 }
 
 void LLVertexBuffer::clientCopy(F64 max_time)
@@ -395,22 +457,29 @@ LLVertexBuffer::LLVertexBuffer(U32 typemask, S32 usage) :
 		mUsage = 0;
 	}
 	
-	if (mUsage == GL_STREAM_DRAW_ARB && !sUseStreamDraw)
+	if (mUsage == GL_DYNAMIC_DRAW_ARB && sPreferStreamDraw)
 	{
-		mUsage = 0;
+		mUsage = GL_STREAM_DRAW_ARB;
 	}
 
-	S32 stride = calcStride(typemask, mOffsets);
+	//zero out offsets
+	for (U32 i = 0; i < TYPE_MAX; i++)
+	{
+		mOffsets[i] = 0;
+	}
 
 	mTypeMask = typemask;
-	mStride = stride;
+	mSize = 0;
+	mAlignedOffset = 0;
+	mAlignedIndexOffset = 0;
+
 	sCount++;
 }
 
 //static
-S32 LLVertexBuffer::calcStride(const U32& typemask, S32* offsets)
+S32 LLVertexBuffer::calcOffsets(const U32& typemask, S32* offsets, S32 num_vertices)
 {
-	S32 stride = 0;
+	S32 offset = 0;
 	for (S32 i=0; i<TYPE_MAX; i++)
 	{
 		U32 mask = 1<<i;
@@ -418,13 +487,35 @@ S32 LLVertexBuffer::calcStride(const U32& typemask, S32* offsets)
 		{
 			if (offsets)
 			{
-				offsets[i] = stride;
+				offsets[i] = offset;
+				offset += LLVertexBuffer::sTypeSize[i]*num_vertices;
+				offset = (offset + 0xF) & ~0xF;
 			}
-			stride += sTypeOffsets[i];
 		}
 	}
 
-	return stride;
+	return offset+16;
+}
+
+//static 
+S32 LLVertexBuffer::calcVertexSize(const U32& typemask)
+{
+	S32 size = 0;
+	for (S32 i = 0; i < TYPE_MAX; i++)
+	{
+		U32 mask = 1<<i;
+		if (typemask & mask)
+		{
+			size += LLVertexBuffer::sTypeSize[i];
+		}
+	}
+
+	return size;
+}
+
+S32 LLVertexBuffer::getSize() const
+{
+	return mSize;
 }
 
 // protected, use unref()
@@ -538,8 +629,7 @@ void LLVertexBuffer::createGLBuffer()
 	{
 		static int gl_buffer_idx = 0;
 		mGLBuffer = ++gl_buffer_idx;
-		mMappedData = new U8[size];
-		memset(mMappedData, 0, size);
+		mMappedData = (U8*) ll_aligned_malloc_16(size);
 	}
 }
 
@@ -560,16 +650,20 @@ void LLVertexBuffer::createGLIndices()
 
 	mEmpty = TRUE;
 
+	//pad by 16 bytes for aligned copies
+	size += 16;
+
 	if (useVBOs())
 	{
+		//pad by another 16 bytes for VBO pointer adjustment
+		size += 16;
 		mMappedIndexData = NULL;
 		genIndices();
 		mResized = TRUE;
 	}
 	else
 	{
-		mMappedIndexData = new U8[size];
-		memset(mMappedIndexData, 0, size);
+		mMappedIndexData = (U8*) ll_aligned_malloc_16(size);
 		static int gl_buffer_idx = 0;
 		mGLIndices = ++gl_buffer_idx;
 	}
@@ -592,7 +686,7 @@ void LLVertexBuffer::destroyGLBuffer()
 		}
 		else
 		{
-			delete [] mMappedData;
+			ll_aligned_free_16(mMappedData);
 			mMappedData = NULL;
 			mEmpty = TRUE;
 		}
@@ -601,7 +695,7 @@ void LLVertexBuffer::destroyGLBuffer()
 	}
 	
 	mGLBuffer = 0;
-	unbind();
+	//unbind();
 }
 
 void LLVertexBuffer::destroyGLIndices()
@@ -617,11 +711,11 @@ void LLVertexBuffer::destroyGLIndices()
 			{
 				llerrs << "Vertex buffer destroyed while mapped." << llendl;
 			}
-			releaseIndices();			
+			releaseIndices();
 		}
 		else
 		{
-			delete [] mMappedIndexData;
+			ll_aligned_free_16(mMappedIndexData);
 			mMappedIndexData = NULL;
 			mEmpty = TRUE;
 		}
@@ -630,7 +724,7 @@ void LLVertexBuffer::destroyGLIndices()
 	}
 
 	mGLIndices = 0;
-	unbind();
+	//unbind();
 }
 
 void LLVertexBuffer::updateNumVerts(S32 nverts)
@@ -646,7 +740,7 @@ void LLVertexBuffer::updateNumVerts(S32 nverts)
 	}
 
 	mRequestedNumVerts = nverts;
-	
+
 	if (!mDynamicSize)
 	{
 		mNumVerts = nverts;
@@ -661,7 +755,7 @@ void LLVertexBuffer::updateNumVerts(S32 nverts)
 		}
 		mNumVerts = nverts;
 	}
-
+	mSize = calcOffsets(mTypeMask, mOffsets, mNumVerts);
 }
 
 void LLVertexBuffer::updateNumIndices(S32 nindices)
@@ -692,6 +786,12 @@ void LLVertexBuffer::allocateBuffer(S32 nverts, S32 nindices, bool create)
 {
 	LLMemType mt2(LLMemType::MTYPE_VERTEX_ALLOCATE_BUFFER);
 		
+	if (nverts < 0 || nindices < 0 ||
+		nverts > 65536)
+	{
+		llerrs << "Bad vertex buffer allocation: " << nverts << " : " << nindices << llendl;
+	}
+
 	updateNumVerts(nverts);
 	updateNumIndices(nindices);
 	
@@ -730,9 +830,6 @@ void LLVertexBuffer::resizeBuffer(S32 newnverts, S32 newnindices)
 	{
 		sAllocatedBytes -= getSize() + getIndicesSize();
 		
-		S32 oldsize = getSize();
-		S32 old_index_size = getIndicesSize();
-
 		updateNumVerts(newnverts);		
 		updateNumIndices(newnindices);
 		
@@ -749,26 +846,10 @@ void LLVertexBuffer::resizeBuffer(S32 newnverts, S32 newnindices)
 			}
 			else
 			{
-				//delete old buffer, keep GL buffer for now
 				if (!useVBOs())
 				{
-					U8* old = mMappedData;
-					mMappedData = new U8[newsize];
-					if (old)
-					{	
-						memcpy(mMappedData, old, llmin(newsize, oldsize));
-						if (newsize > oldsize)
-						{
-							memset(mMappedData+oldsize, 0, newsize-oldsize);
-						}
-
-						delete [] old;
-					}
-					else
-					{
-						memset(mMappedData, 0, newsize);
-						mEmpty = TRUE;
-					}
+					ll_aligned_free_16(mMappedData);
+					mMappedData = (U8*) ll_aligned_malloc_16(newsize);
 				}
 				mResized = TRUE;
 			}
@@ -788,24 +869,8 @@ void LLVertexBuffer::resizeBuffer(S32 newnverts, S32 newnindices)
 			{
 				if (!useVBOs())
 				{
-					//delete old buffer, keep GL buffer for now
-					U8* old = mMappedIndexData;
-					mMappedIndexData = new U8[new_index_size];
-					
-					if (old)
-					{	
-						memcpy(mMappedIndexData, old, llmin(new_index_size, old_index_size));
-						if (new_index_size > old_index_size)
-						{
-							memset(mMappedIndexData+old_index_size, 0, new_index_size - old_index_size);
-						}
-						delete [] old;
-					}
-					else
-					{
-						memset(mMappedIndexData, 0, new_index_size);
-						mEmpty = TRUE;
-					}
+					ll_aligned_free_16(mMappedIndexData);
+					mMappedIndexData = (U8*) ll_aligned_malloc_16(new_index_size);
 				}
 				mResized = TRUE;
 			}
@@ -846,8 +911,8 @@ void LLVertexBuffer::freeClientBuffer()
 {
 	if(useVBOs() && sDisableVBOMapping && (mMappedData || mMappedIndexData))
 	{
-		delete[] mMappedData ;
-		delete[] mMappedIndexData ;
+		ll_aligned_free_16(mMappedData) ;
+		ll_aligned_free_16(mMappedIndexData) ;
 		mMappedData = NULL ;
 		mMappedIndexData = NULL ;
 	}
@@ -857,9 +922,7 @@ void LLVertexBuffer::allocateClientVertexBuffer()
 {
 	if(!mMappedData)
 	{
-		U32 size = getSize() ;
-		mMappedData = new U8[size];
-		memset(mMappedData, 0, size);
+		mMappedData = (U8*)ll_aligned_malloc_16(getSize());
 	}
 }
 
@@ -867,9 +930,7 @@ void LLVertexBuffer::allocateClientIndexBuffer()
 {
 	if(!mMappedIndexData)
 	{
-		U32 size = getIndicesSize();
-		mMappedIndexData = new U8[size];
-		memset(mMappedIndexData, 0, size);
+		mMappedIndexData = (U8*)ll_aligned_malloc_16(getIndicesSize());
 	}
 }
 
@@ -900,11 +961,15 @@ U8* LLVertexBuffer::mapVertexBuffer(S32 type, S32 access)
 			}
 			else
 			{
-				mMappedData = (U8*) glMapBufferARB(GL_ARRAY_BUFFER_ARB, GL_WRITE_ONLY_ARB);
+				U8* src = (U8*) glMapBufferARB(GL_ARRAY_BUFFER_ARB, GL_WRITE_ONLY_ARB);
+				mMappedData = LL_NEXT_ALIGNED_ADDRESS<U8>(src);
+				mAlignedOffset = mMappedData - src;
+			
+				stop_glerror();
 			}
-			stop_glerror();
 		}
 		
+		
 		if (!mMappedData)
 		{
 			log_glerror();
@@ -916,7 +981,7 @@ U8* LLVertexBuffer::mapVertexBuffer(S32 type, S32 access)
 			llinfos << "Available virtual memory(KB): " << avail_vir_mem << llendl;
 
 			if(!sDisableVBOMapping)
-			{
+			{			
 				//--------------------
 				//print out more debug info before crash
 				llinfos << "vertex buffer size: (num verts : num indices) = " << getNumVerts() << " : " << getNumIndices() << llendl ;
@@ -932,7 +997,7 @@ U8* LLVertexBuffer::mapVertexBuffer(S32 type, S32 access)
 					llerrs << "Invalid GL vertex buffer bound: " << buff << llendl;
 				}
 
-				
+							
 				llerrs << "glMapBuffer returned NULL (no vertex data)" << llendl;
 			}
 			else
@@ -973,9 +1038,11 @@ U8* LLVertexBuffer::mapIndexBuffer(S32 access)
 			}
 			else
 			{
-				mMappedIndexData = (U8*) glMapBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, GL_WRITE_ONLY_ARB);
+				U8* src = (U8*) glMapBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, GL_WRITE_ONLY_ARB);
+				mMappedIndexData = LL_NEXT_ALIGNED_ADDRESS<U8>(src);
+				mAlignedIndexOffset = mMappedIndexData - src;
+				stop_glerror();
 			}
-			stop_glerror();
 		}
 
 		if (!mMappedIndexData)
@@ -1066,7 +1133,6 @@ void LLVertexBuffer::unmapBuffer(S32 type)
 			//throw out client data (we won't be using it again)
 			mEmpty = TRUE;
 			mFinal = TRUE;
-
 			if(sDisableVBOMapping)
 			{
 				freeClientBuffer() ;
@@ -1104,7 +1170,7 @@ template <class T,S32 type> struct VertexBufferStrider
 		}
 		else if (vbo.hasDataType(type))
 		{
-			S32 stride = vbo.getStride();
+			S32 stride = LLVertexBuffer::sTypeSize[type];
 
 			if (vbo.mapVertexBuffer(type) == NULL)
 			{
@@ -1112,7 +1178,7 @@ template <class T,S32 type> struct VertexBufferStrider
 				return FALSE;
 			}
 
-			strider = (T*)(vbo.getMappedData() + vbo.getOffset(type) + index*stride);
+			strider = (T*)(vbo.getMappedData() + vbo.getOffset(type)+index*stride);
 			strider.setStride(stride);
 			return TRUE;
 		}
@@ -1124,7 +1190,6 @@ template <class T,S32 type> struct VertexBufferStrider
 	}
 };
 
-
 bool LLVertexBuffer::getVertexStrider(LLStrider<LLVector3>& strider, S32 index)
 {
 	return VertexBufferStrider<LLVector3,TYPE_VERTEX>::get(*this, strider, index);
@@ -1165,28 +1230,15 @@ bool LLVertexBuffer::getWeightStrider(LLStrider<F32>& strider, S32 index)
 {
 	return VertexBufferStrider<F32,TYPE_WEIGHT>::get(*this, strider, index);
 }
-bool LLVertexBuffer::getClothWeightStrider(LLStrider<LLVector4>& strider, S32 index)
+
+bool LLVertexBuffer::getWeight4Strider(LLStrider<LLVector4>& strider, S32 index)
 {
-	return VertexBufferStrider<LLVector4,TYPE_CLOTHWEIGHT>::get(*this, strider, index);
+	return VertexBufferStrider<LLVector4,TYPE_WEIGHT4>::get(*this, strider, index);
 }
 
-void LLVertexBuffer::setStride(S32 type, S32 new_stride)
+bool LLVertexBuffer::getClothWeightStrider(LLStrider<LLVector4>& strider, S32 index)
 {
-	LLMemType mt2(LLMemType::MTYPE_VERTEX_SET_STRIDE);
-	if (mNumVerts)
-	{
-		llerrs << "LLVertexBuffer::setOffset called with mNumVerts = " << mNumVerts << llendl;
-	}
-	// This code assumes that setStride() will only be called once per VBO per type.
-	S32 delta = new_stride - sTypeOffsets[type];
-	for (S32 i=type+1; i<TYPE_MAX; i++)
-	{
-		if (mTypeMask & (1<<i))
-		{
-			mOffsets[i] += delta;
-		}
-	}
-	mStride += delta;
+	return VertexBufferStrider<LLVector4,TYPE_CLOTHWEIGHT>::get(*this, strider, index);
 }
 
 //----------------------------------------------------------------------------
@@ -1385,8 +1437,7 @@ void LLVertexBuffer::setupVertexBuffer(U32 data_mask) const
 {
 	LLMemType mt2(LLMemType::MTYPE_VERTEX_SETUP_VERTEX_BUFFER);
 	stop_glerror();
-	U8* base = useVBOs() ? NULL : mMappedData;
-	S32 stride = mStride;
+	U8* base = useVBOs() ? (U8*) mAlignedOffset : mMappedData;
 
 	if ((data_mask & mTypeMask) != data_mask)
 	{
@@ -1395,52 +1446,58 @@ void LLVertexBuffer::setupVertexBuffer(U32 data_mask) const
 
 	if (data_mask & MAP_NORMAL)
 	{
-		glNormalPointer(GL_FLOAT, stride, (void*)(base + mOffsets[TYPE_NORMAL]));
+		glNormalPointer(GL_FLOAT, LLVertexBuffer::sTypeSize[TYPE_NORMAL], (void*)(base + mOffsets[TYPE_NORMAL]));
 	}
 	if (data_mask & MAP_TEXCOORD3)
 	{
 		glClientActiveTextureARB(GL_TEXTURE3_ARB);
-		glTexCoordPointer(2,GL_FLOAT, stride, (void*)(base + mOffsets[TYPE_TEXCOORD3]));
+		glTexCoordPointer(2,GL_FLOAT, LLVertexBuffer::sTypeSize[TYPE_TEXCOORD3], (void*)(base + mOffsets[TYPE_TEXCOORD3]));
 		glClientActiveTextureARB(GL_TEXTURE0_ARB);
 	}
 	if (data_mask & MAP_TEXCOORD2)
 	{
 		glClientActiveTextureARB(GL_TEXTURE2_ARB);
-		glTexCoordPointer(2,GL_FLOAT, stride, (void*)(base + mOffsets[TYPE_TEXCOORD2]));
+		glTexCoordPointer(2,GL_FLOAT, LLVertexBuffer::sTypeSize[TYPE_TEXCOORD2], (void*)(base + mOffsets[TYPE_TEXCOORD2]));
 		glClientActiveTextureARB(GL_TEXTURE0_ARB);
 	}
 	if (data_mask & MAP_TEXCOORD1)
 	{
 		glClientActiveTextureARB(GL_TEXTURE1_ARB);
-		glTexCoordPointer(2,GL_FLOAT, stride, (void*)(base + mOffsets[TYPE_TEXCOORD1]));
+		glTexCoordPointer(2,GL_FLOAT, LLVertexBuffer::sTypeSize[TYPE_TEXCOORD1], (void*)(base + mOffsets[TYPE_TEXCOORD1]));
 		glClientActiveTextureARB(GL_TEXTURE0_ARB);
 	}
 	if (data_mask & MAP_BINORMAL)
 	{
 		glClientActiveTextureARB(GL_TEXTURE2_ARB);
-		glTexCoordPointer(3,GL_FLOAT, stride, (void*)(base + mOffsets[TYPE_BINORMAL]));
+		glTexCoordPointer(3,GL_FLOAT, LLVertexBuffer::sTypeSize[TYPE_BINORMAL], (void*)(base + mOffsets[TYPE_BINORMAL]));
 		glClientActiveTextureARB(GL_TEXTURE0_ARB);
 	}
 	if (data_mask & MAP_TEXCOORD0)
 	{
-		glTexCoordPointer(2,GL_FLOAT, stride, (void*)(base + mOffsets[TYPE_TEXCOORD0]));
+		glTexCoordPointer(2,GL_FLOAT, LLVertexBuffer::sTypeSize[TYPE_TEXCOORD0], (void*)(base + mOffsets[TYPE_TEXCOORD0]));
 	}
 	if (data_mask & MAP_COLOR)
 	{
-		glColorPointer(4, GL_UNSIGNED_BYTE, stride, (void*)(base + mOffsets[TYPE_COLOR]));
+		glColorPointer(4, GL_UNSIGNED_BYTE, LLVertexBuffer::sTypeSize[TYPE_COLOR], (void*)(base + mOffsets[TYPE_COLOR]));
 	}
 	
 	if (data_mask & MAP_WEIGHT)
 	{
-		glVertexAttribPointerARB(1, 1, GL_FLOAT, FALSE, stride, (void*)(base + mOffsets[TYPE_WEIGHT]));
+		glVertexAttribPointerARB(1, 1, GL_FLOAT, FALSE, LLVertexBuffer::sTypeSize[TYPE_WEIGHT], (void*)(base + mOffsets[TYPE_WEIGHT]));
+	}
+
+	if (data_mask & MAP_WEIGHT4 && sWeight4Loc != -1)
+	{
+		glVertexAttribPointerARB(sWeight4Loc, 4, GL_FLOAT, FALSE, LLVertexBuffer::sTypeSize[TYPE_WEIGHT4], (void*)(base+mOffsets[TYPE_WEIGHT4]));
 	}
+
 	if (data_mask & MAP_CLOTHWEIGHT)
 	{
-		glVertexAttribPointerARB(4, 4, GL_FLOAT, TRUE,  stride, (void*)(base + mOffsets[TYPE_CLOTHWEIGHT]));
+		glVertexAttribPointerARB(4, 4, GL_FLOAT, TRUE,  LLVertexBuffer::sTypeSize[TYPE_CLOTHWEIGHT], (void*)(base + mOffsets[TYPE_CLOTHWEIGHT]));
 	}
 	if (data_mask & MAP_VERTEX)
 	{
-		glVertexPointer(3,GL_FLOAT, stride, (void*)(base + 0));
+		glVertexPointer(3,GL_FLOAT, LLVertexBuffer::sTypeSize[TYPE_VERTEX], (void*)(base + 0));
 	}
 
 	llglassertok();
diff --git a/indra/llrender/llvertexbuffer.h b/indra/llrender/llvertexbuffer.h
index c51ce7ac4e..a9f22193f8 100644
--- a/indra/llrender/llvertexbuffer.h
+++ b/indra/llrender/llvertexbuffer.h
@@ -56,42 +56,65 @@ protected:
 	virtual GLuint allocateName()
 	{
 		GLuint name;
+		stop_glerror();
 		glGenBuffersARB(1, &name);
+		stop_glerror();
 		return name;
 	}
 
 	virtual void releaseName(GLuint name)
 	{
+		stop_glerror();
 		glDeleteBuffersARB(1, &name);
+		stop_glerror();
 	}
 };
 
 
 //============================================================================
-// base class
+// base class 
 
 class LLVertexBuffer : public LLRefCount
 {
 public:
+	LLVertexBuffer(const LLVertexBuffer& rhs)
+	{
+		*this = rhs;
+	}
+
+	const LLVertexBuffer& operator=(const LLVertexBuffer& rhs)
+	{
+		llerrs << "Illegal operation!" << llendl;
+		return *this;
+	}
+
 	static LLVBOPool sStreamVBOPool;
 	static LLVBOPool sDynamicVBOPool;
 	static LLVBOPool sStreamIBOPool;
 	static LLVBOPool sDynamicIBOPool;
 
+	static S32	sWeight4Loc;
+
 	static BOOL	sUseStreamDraw;
+	static BOOL	sPreferStreamDraw;
 
 	static void initClass(bool use_vbo, bool no_vbo_mapping);
 	static void cleanupClass();
 	static void setupClientArrays(U32 data_mask);
+	static void drawArrays(U32 mode, const std::vector<LLVector3>& pos, const std::vector<LLVector3>& norm);
+
  	static void clientCopy(F64 max_time = 0.005); //copy data from client to GL
 	static void unbind(); //unbind any bound vertex buffer
 
 	//get the size of a vertex with the given typemask
-	//if offsets is not NULL, its contents will be filled
-	//with the offset of each vertex component in the buffer, 
+	static S32 calcVertexSize(const U32& typemask);
+
+	//get the size of a buffer with the given typemask and vertex count
+	//fill offsets with the offset of each vertex component array into the buffer
 	// indexed by the following enum
-	static S32 calcStride(const U32& typemask, S32* offsets = NULL); 										
+	static S32 calcOffsets(const U32& typemask, S32* offsets, S32 num_vertices);		
 
+	
 	enum {
 		TYPE_VERTEX,
 		TYPE_NORMAL,
@@ -103,6 +126,7 @@ public:
 		// These use VertexAttribPointer and should possibly be made generic
 		TYPE_BINORMAL,
 		TYPE_WEIGHT,
+		TYPE_WEIGHT4,
 		TYPE_CLOTHWEIGHT,
 		TYPE_MAX,
 		TYPE_INDEX,
@@ -118,6 +142,7 @@ public:
 		// These use VertexAttribPointer and should possibly be made generic
 		MAP_BINORMAL = (1<<TYPE_BINORMAL),
 		MAP_WEIGHT = (1<<TYPE_WEIGHT),
+		MAP_WEIGHT4 = (1<<TYPE_WEIGHT4),
 		MAP_CLOTHWEIGHT = (1<<TYPE_CLOTHWEIGHT),
 	};
 	
@@ -172,6 +197,7 @@ public:
 	bool getBinormalStrider(LLStrider<LLVector3>& strider, S32 index=0);
 	bool getColorStrider(LLStrider<LLColor4U>& strider, S32 index=0);
 	bool getWeightStrider(LLStrider<F32>& strider, S32 index=0);
+	bool getWeight4Strider(LLStrider<LLVector4>& strider, S32 index=0);
 	bool getClothWeightStrider(LLStrider<LLVector4>& strider, S32 index=0);
 	
 	BOOL isEmpty() const					{ return mEmpty; }
@@ -181,33 +207,37 @@ public:
 	S32 getRequestedVerts() const			{ return mRequestedNumVerts; }
 	S32 getRequestedIndices() const			{ return mRequestedNumIndices; }
 
-	U8* getIndicesPointer() const			{ return useVBOs() ? NULL : mMappedIndexData; }
-	U8* getVerticesPointer() const			{ return useVBOs() ? NULL : mMappedData; }
-	S32 getStride() const					{ return mStride; }
-	S32 getTypeMask() const					{ return mTypeMask; }
-	BOOL hasDataType(S32 type) const		{ return ((1 << type) & getTypeMask()) ? TRUE : FALSE; }
-	S32 getSize() const						{ return mNumVerts*mStride; }
+	U8* getIndicesPointer() const			{ return useVBOs() ? (U8*) mAlignedIndexOffset : mMappedIndexData; }
+	U8* getVerticesPointer() const			{ return useVBOs() ? (U8*) mAlignedOffset : mMappedData; }
+	U32 getTypeMask() const					{ return mTypeMask; }
+	bool hasDataType(S32 type) const		{ return ((1 << type) & getTypeMask()); }
+	S32 getSize() const;
 	S32 getIndicesSize() const				{ return mNumIndices * sizeof(U16); }
 	U8* getMappedData() const				{ return mMappedData; }
 	U8* getMappedIndices() const			{ return mMappedIndexData; }
 	S32 getOffset(S32 type) const			{ return mOffsets[type]; }
 	S32 getUsage() const					{ return mUsage; }
 
-	void setStride(S32 type, S32 new_stride);
-	
 	void markDirty(U32 vert_index, U32 vert_count, U32 indices_index, U32 indices_count);
 
 	void draw(U32 mode, U32 count, U32 indices_offset) const;
 	void drawArrays(U32 mode, U32 offset, U32 count) const;
 	void drawRange(U32 mode, U32 start, U32 end, U32 count, U32 indices_offset) const;
 
+	//for debugging, validate data in given range is valid
+	void validateRange(U32 start, U32 end, U32 count, U32 offset) const;
+
+	
+
 protected:	
 	S32		mNumVerts;		// Number of vertices allocated
 	S32		mNumIndices;	// Number of indices allocated
 	S32		mRequestedNumVerts;  // Number of vertices requested
 	S32		mRequestedNumIndices;  // Number of indices requested
 
-	S32		mStride;
+	ptrdiff_t mAlignedOffset;
+	ptrdiff_t mAlignedIndexOffset;
+	S32		mSize;
 	U32		mTypeMask;
 	S32		mUsage;			// GL usage
 	U32		mGLBuffer;		// GL VBO handle
@@ -248,12 +278,12 @@ public:
 		
 	static BOOL sDisableVBOMapping; //disable glMapBufferARB
 	static BOOL sEnableVBOs;
-	static BOOL sVBOActive;
-	static BOOL sIBOActive;
-	static S32 sTypeOffsets[TYPE_MAX];
+	static S32 sTypeSize[TYPE_MAX];
 	static U32 sGLMode[LLRender::NUM_MODES];
 	static U32 sGLRenderBuffer;
-	static U32 sGLRenderIndices;	
+	static U32 sGLRenderIndices;
+	static BOOL sVBOActive;
+	static BOOL sIBOActive;
 	static U32 sLastMask;
 	static U32 sAllocatedBytes;
 	static U32 sBindCount;