merge

9 files changed, 284 insertions, 132 deletions

diff --git a/indra/llrender/llfontfreetype.cpp b/indra/llrender/llfontfreetype.cpp
index ab668dc192..c41730ebaa 100644
--- a/indra/llrender/llfontfreetype.cpp
+++ b/indra/llrender/llfontfreetype.cpp
@@ -157,7 +157,7 @@ void ft_close_cb(FT_Stream stream) {
 }
 #endif
 
-BOOL LLFontFreetype::loadFace(const std::string& filename, F32 point_size, F32 vert_dpi, F32 horz_dpi, S32 components, BOOL is_fallback)
+BOOL LLFontFreetype::loadFace(const std::string& filename, F32 point_size, F32 vert_dpi, F32 horz_dpi, S32 components, BOOL is_fallback, S32 face_n)
 {
 	// Don't leak face objects.  This is also needed to deal with
 	// changed font file names.
@@ -168,40 +168,8 @@ BOOL LLFontFreetype::loadFace(const std::string& filename, F32 point_size, F32 v
 	}
 	
 	int error;
-
 #ifdef LL_WINDOWS
-	pFileStream = new llifstream(filename, std::ios::binary);
-	if (pFileStream->is_open())
-	{
-		std::streampos beg = pFileStream->tellg();
-		pFileStream->seekg(0, std::ios::end);
-		std::streampos end = pFileStream->tellg();
-		std::size_t file_size = end - beg;
-		pFileStream->seekg(0, std::ios::beg);
-
-		pFtStream = new LLFT_Stream();
-		pFtStream->base = 0;
-		pFtStream->pos = 0;
-		pFtStream->size = file_size;
-		pFtStream->descriptor.pointer = pFileStream;
-		pFtStream->read = ft_read_cb;
-		pFtStream->close = ft_close_cb;
-
-		FT_Open_Args args;
-		args.flags = FT_OPEN_STREAM;
-		args.stream = (FT_StreamRec*)pFtStream;
-
-		error = FT_Open_Face(gFTLibrary,
-							 &args,
-							 0,
-							 &mFTFace);
-	}
-	else
-	{
-		delete pFileStream;
-		pFileStream = NULL;
-		return FALSE;
-	}
+	error = ftOpenFace(filename, face_n);
 #else
 	error = FT_New_Face( gFTLibrary,
 						 filename.c_str(),
@@ -212,11 +180,7 @@ BOOL LLFontFreetype::loadFace(const std::string& filename, F32 point_size, F32 v
 	if (error)
 	{
 #ifdef LL_WINDOWS
-		pFileStream->close();
-		delete pFileStream;
-		delete pFtStream;
-		pFileStream = NULL;
-		pFtStream = NULL;
+		clearFontStreams();
 #endif
 		return FALSE;
 	}
@@ -235,11 +199,7 @@ BOOL LLFontFreetype::loadFace(const std::string& filename, F32 point_size, F32 v
 		// Clean up freetype libs.
 		FT_Done_Face(mFTFace);
 #ifdef LL_WINDOWS
-		pFileStream->close();
-		delete pFileStream;
-		delete pFtStream;
-		pFileStream = NULL;
-		pFtStream = NULL;
+		clearFontStreams();
 #endif
 		mFTFace = NULL;
 		return FALSE;
@@ -285,18 +245,88 @@ BOOL LLFontFreetype::loadFace(const std::string& filename, F32 point_size, F32 v
 	if(mFTFace->style_flags & FT_STYLE_FLAG_BOLD)
 	{
 		mStyle |= LLFontGL::BOLD;
-		mStyle &= ~LLFontGL::NORMAL;
 	}
 
 	if(mFTFace->style_flags & FT_STYLE_FLAG_ITALIC)
 	{
 		mStyle |= LLFontGL::ITALIC;
-		mStyle &= ~LLFontGL::NORMAL;
 	}
 
 	return TRUE;
 }
 
+S32 LLFontFreetype::getNumFaces(const std::string& filename)
+{
+	if (mFTFace)
+	{
+		FT_Done_Face(mFTFace);
+		mFTFace = NULL;
+	}
+
+	S32 num_faces = 1;
+
+#ifdef LL_WINDOWS
+	int error = ftOpenFace(filename, 0);
+		
+	if (error)
+	{
+		return 0;
+	}
+	else
+	{
+		num_faces = mFTFace->num_faces;
+	}
+	
+	FT_Done_Face(mFTFace);
+	clearFontStreams();
+	mFTFace = NULL;
+#endif
+
+	return num_faces;
+}
+
+#ifdef LL_WINDOWS
+S32 LLFontFreetype::ftOpenFace(const std::string& filename, S32 face_n)
+{
+	S32 error = -1;
+	pFileStream = new llifstream(filename, std::ios::binary);
+	if (pFileStream->is_open())
+	{
+		std::streampos beg = pFileStream->tellg();
+		pFileStream->seekg(0, std::ios::end);
+		std::streampos end = pFileStream->tellg();
+		std::size_t file_size = end - beg;
+		pFileStream->seekg(0, std::ios::beg);
+
+		pFtStream = new LLFT_Stream();
+		pFtStream->base = 0;
+		pFtStream->pos = 0;
+		pFtStream->size = file_size;
+		pFtStream->descriptor.pointer = pFileStream;
+		pFtStream->read = ft_read_cb;
+		pFtStream->close = ft_close_cb;
+
+		FT_Open_Args args;
+		args.flags = FT_OPEN_STREAM;
+		args.stream = (FT_StreamRec*)pFtStream;
+		error = FT_Open_Face(gFTLibrary, &args, face_n, &mFTFace);
+	}
+	return error;
+}
+
+void LLFontFreetype::clearFontStreams()
+{
+	if (pFileStream)
+	{
+		pFileStream->close();
+	}
+	delete pFileStream;
+	delete pFtStream;
+	pFileStream = NULL;
+	pFtStream = NULL;
+}
+#endif
+
 void LLFontFreetype::setFallbackFonts(const font_vector_t &font)
 {
 	mFallbackFonts = font;
diff --git a/indra/llrender/llfontfreetype.h b/indra/llrender/llfontfreetype.h
index aadebf5e70..1afe84e770 100644
--- a/indra/llrender/llfontfreetype.h
+++ b/indra/llrender/llfontfreetype.h
@@ -84,7 +84,14 @@ public:
 
 	// is_fallback should be true for fallback fonts that aren't used
 	// to render directly (Unicode backup, primarily)
-	BOOL loadFace(const std::string& filename, F32 point_size, F32 vert_dpi, F32 horz_dpi, S32 components, BOOL is_fallback);
+	BOOL loadFace(const std::string& filename, F32 point_size, F32 vert_dpi, F32 horz_dpi, S32 components, BOOL is_fallback, S32 face_n = 0);
+
+	S32 getNumFaces(const std::string& filename);
+
+#ifdef LL_WINDOWS
+	S32 ftOpenFace(const std::string& filename, S32 face_n);
+	void clearFontStreams();
+#endif
 
 	typedef std::vector<LLPointer<LLFontFreetype> > font_vector_t;
 
diff --git a/indra/llrender/llfontgl.cpp b/indra/llrender/llfontgl.cpp
index 8cd18c5fa1..86a4c35e6d 100644
--- a/indra/llrender/llfontgl.cpp
+++ b/indra/llrender/llfontgl.cpp
@@ -89,14 +89,24 @@ void LLFontGL::destroyGL()
 	mFontFreetype->destroyGL();
 }
 
-BOOL LLFontGL::loadFace(const std::string& filename, F32 point_size, F32 vert_dpi, F32 horz_dpi, S32 components, BOOL is_fallback)
+BOOL LLFontGL::loadFace(const std::string& filename, F32 point_size, F32 vert_dpi, F32 horz_dpi, S32 components, BOOL is_fallback, S32 face_n)
 {
 	if(mFontFreetype == reinterpret_cast<LLFontFreetype*>(NULL))
 	{
 		mFontFreetype = new LLFontFreetype;
 	}
 
-	return mFontFreetype->loadFace(filename, point_size, vert_dpi, horz_dpi, components, is_fallback);
+	return mFontFreetype->loadFace(filename, point_size, vert_dpi, horz_dpi, components, is_fallback, face_n);
+}
+
+S32 LLFontGL::getNumFaces(const std::string& filename)
+{
+	if (mFontFreetype == reinterpret_cast<LLFontFreetype*>(NULL))
+	{
+		mFontFreetype = new LLFontFreetype;
+	}
+
+	return mFontFreetype->getNumFaces(filename);
 }
 
 static LLTrace::BlockTimerStatHandle FTM_RENDER_FONTS("Fonts");
@@ -860,10 +870,6 @@ void LLFontGL::destroyAllGL()
 U8 LLFontGL::getStyleFromString(const std::string &style)
 {
 	S32 ret = 0;
-	if (style.find("NORMAL") != style.npos)
-	{
-		ret |= NORMAL;
-	}
 	if (style.find("BOLD") != style.npos)
 	{
 		ret |= BOLD;
@@ -883,7 +889,7 @@ U8 LLFontGL::getStyleFromString(const std::string &style)
 std::string LLFontGL::getStringFromStyle(U8 style)
 {
 	std::string style_string;
-	if (style & NORMAL)
+	if (style == NORMAL)
 	{
 		style_string += "|NORMAL";
 	}
diff --git a/indra/llrender/llfontgl.h b/indra/llrender/llfontgl.h
index 7d0e53f60f..10891faed9 100644
--- a/indra/llrender/llfontgl.h
+++ b/indra/llrender/llfontgl.h
@@ -87,7 +87,9 @@ public:
 
 	void destroyGL();
 
-	BOOL loadFace(const std::string& filename, F32 point_size, const F32 vert_dpi, const F32 horz_dpi, const S32 components, BOOL is_fallback);
+	BOOL loadFace(const std::string& filename, F32 point_size, const F32 vert_dpi, const F32 horz_dpi, const S32 components, BOOL is_fallback, S32 face_n = 0);
+
+	S32 getNumFaces(const std::string& filename);
 
 	S32 render(const LLWString &text, S32 begin_offset, 
 				const LLRect& rect, 
diff --git a/indra/llrender/llfontregistry.cpp b/indra/llrender/llfontregistry.cpp
index 3c829596ce..dbe71e2882 100644
--- a/indra/llrender/llfontregistry.cpp
+++ b/indra/llrender/llfontregistry.cpp
@@ -44,6 +44,8 @@ using std::map;
 bool font_desc_init_from_xml(LLXMLNodePtr node, LLFontDescriptor& desc);
 bool init_from_xml(LLFontRegistry* registry, LLXMLNodePtr node);
 
+const std::string MACOSX_FONT_PATH_LIBRARY = "/Library/Fonts/";
+
 LLFontDescriptor::LLFontDescriptor():
 	mStyle(0)
 {
@@ -61,6 +63,16 @@ LLFontDescriptor::LLFontDescriptor(const std::string& name,
 }
 
 LLFontDescriptor::LLFontDescriptor(const std::string& name,
+	const std::string& size,
+	const U8 style,
+	const string_vec_t& file_names,
+	const string_vec_t& ft_collection_listections) :
+	LLFontDescriptor(name, size, style, file_names)
+{
+	mFontCollectionsList = ft_collection_listections;
+}
+
+LLFontDescriptor::LLFontDescriptor(const std::string& name,
 								   const std::string& size, 
 								   const U8 style):
 	mName(name),
@@ -162,7 +174,7 @@ LLFontDescriptor LLFontDescriptor::normalize() const
 	if (removeSubString(new_name,"Italic"))
 		new_style |= LLFontGL::ITALIC;
 
-	return LLFontDescriptor(new_name,new_size,new_style,getFileNames());
+	return LLFontDescriptor(new_name,new_size,new_style,getFileNames(),getFontCollectionsList());
 }
 
 LLFontRegistry::LLFontRegistry(bool create_gl_textures)
@@ -213,6 +225,7 @@ bool LLFontRegistry::parseFontInfo(const std::string& xml_filename)
 			success = success || init_succ;
 		}
 	}
+
 	//if (success)
 	//	dump();
 
@@ -260,6 +273,16 @@ bool font_desc_init_from_xml(LLXMLNodePtr node, LLFontDescriptor& desc)
 		{
 			std::string font_file_name = child->getTextContents();
 			desc.getFileNames().push_back(font_file_name);
+			
+			if (child->hasAttribute("load_collection"))
+			{
+				BOOL col = FALSE;
+				child->getAttributeBOOL("load_collection", col);
+				if (col)
+				{
+					desc.getFontCollectionsList().push_back(font_file_name);
+				}
+			}
 		}
 		else if (child->hasName("os"))
 		{
@@ -306,8 +329,15 @@ bool init_from_xml(LLFontRegistry* registry, LLXMLNodePtr node)
 					match_file_names.insert(match_file_names.begin(),
 											desc.getFileNames().begin(),
 											desc.getFileNames().end());
+
+					string_vec_t collections_list = match_desc->getFontCollectionsList();
+					collections_list.insert(collections_list.begin(),
+						desc.getFontCollectionsList().begin(),
+						desc.getFontCollectionsList().end());
+
 					LLFontDescriptor new_desc = *match_desc;
 					new_desc.getFileNames() = match_file_names;
+					new_desc.getFontCollectionsList() = collections_list;
 					registry->mFontMap.erase(*match_desc);
 					registry->mFontMap[new_desc] = NULL;
 				}
@@ -393,6 +423,7 @@ LLFontGL *LLFontRegistry::createFont(const LLFontDescriptor& desc)
 	// Build list of font names to look for.
 	// Files specified for this font come first, followed by those from the default descriptor.
 	string_vec_t file_names = match_desc->getFileNames();
+	string_vec_t ft_collection_list = match_desc->getFontCollectionsList();
 	string_vec_t default_file_names;
 	LLFontDescriptor default_desc("default",s_template_string,0);
 	const LLFontDescriptor *match_default_desc = getMatchingFontDesc(default_desc);
@@ -401,6 +432,9 @@ LLFontGL *LLFontRegistry::createFont(const LLFontDescriptor& desc)
 		file_names.insert(file_names.end(),
 						  match_default_desc->getFileNames().begin(),
 						  match_default_desc->getFileNames().end());
+		ft_collection_list.insert(ft_collection_list.end(),
+			match_default_desc->getFontCollectionsList().begin(),
+			match_default_desc->getFontCollectionsList().end());
 	}
 
 	// Add ultimate fallback list - generated dynamically on linux,
@@ -433,39 +467,62 @@ LLFontGL *LLFontRegistry::createFont(const LLFontDescriptor& desc)
 		file_name_it != file_names.end(); 
 		++file_name_it)
 	{
-		LLFontGL *fontp = new LLFontGL;
-		std::string font_path = local_path + *file_name_it;
+		LLFontGL *fontp = NULL;
+		string_vec_t font_paths;
+		font_paths.push_back(local_path + *file_name_it);
+		font_paths.push_back(sys_path + *file_name_it);
+#if LL_DARWIN
+		font_paths.push_back(MACOSX_FONT_PATH_LIBRARY + *file_name_it);
+#endif
+		
+		bool is_ft_collection = (std::find(ft_collection_list.begin(), ft_collection_list.end(), *file_name_it) != ft_collection_list.end());
 		// *HACK: Fallback fonts don't render, so we can use that to suppress
 		// creation of OpenGL textures for test apps. JC
 		BOOL is_fallback = !is_first_found || !mCreateGLTextures;
 		F32 extra_scale = (is_fallback)?fallback_scale:1.0;
-		if (!fontp->loadFace(font_path, extra_scale * point_size,
-							 LLFontGL::sVertDPI, LLFontGL::sHorizDPI, 2, is_fallback))
+		F32 point_size_scale = extra_scale * point_size;
+		bool is_font_loaded = false;
+		for(string_vec_t::iterator font_paths_it = font_paths.begin();
+			font_paths_it != font_paths.end();
+			++font_paths_it)
 		{
-			font_path = sys_path + *file_name_it;
-
-			if (!fontp->loadFace(font_path, extra_scale * point_size,
-								 LLFontGL::sVertDPI, LLFontGL::sHorizDPI, 2, is_fallback))
+			fontp = new LLFontGL;
+			S32 num_faces = is_ft_collection ? fontp->getNumFaces(*font_paths_it) : 1;
+			for (S32 i = 0; i < num_faces; i++)
 			{
-				LL_INFOS_ONCE("LLFontRegistry") << "Couldn't load font " << *file_name_it << " from path " << local_path << LL_ENDL;
-				delete fontp;
-				fontp = NULL;
+				if (fontp == NULL)
+				{
+					fontp = new LLFontGL;
+				}
+				if (fontp->loadFace(*font_paths_it, point_size_scale,
+								 LLFontGL::sVertDPI, LLFontGL::sHorizDPI, 2, is_fallback, i))
+				{
+					is_font_loaded = true;
+					if (is_first_found)
+					{
+						result = fontp;
+						is_first_found = false;
+					}
+					else
+					{
+						fontlist.push_back(fontp->mFontFreetype);
+						delete fontp;
+						fontp = NULL;
+					}
+				}
+				else
+				{
+					delete fontp;
+					fontp = NULL;
+				}
 			}
+			if (is_font_loaded) break;
 		}
-		
-		if(fontp)
+		if(!is_font_loaded)
 		{
-			if (is_first_found)
-			{
-				result = fontp;
-				is_first_found = false;
-			}
-			else
-			{
-				fontlist.push_back(fontp->mFontFreetype);
-				delete fontp;
-				fontp = NULL;
-			}
+			LL_INFOS_ONCE("LLFontRegistry") << "Couldn't load font " << *file_name_it <<  LL_ENDL;
+			delete fontp;
+			fontp = NULL;
 		}
 	}
 
diff --git a/indra/llrender/llfontregistry.h b/indra/llrender/llfontregistry.h
index 177eb6c8a5..e30c81c630 100644
--- a/indra/llrender/llfontregistry.h
+++ b/indra/llrender/llfontregistry.h
@@ -40,6 +40,7 @@ public:
 	LLFontDescriptor();
 	LLFontDescriptor(const std::string& name, const std::string& size, const U8 style);
 	LLFontDescriptor(const std::string& name, const std::string& size, const U8 style, const string_vec_t& file_names);
+	LLFontDescriptor(const std::string& name, const std::string& size, const U8 style, const string_vec_t& file_names, const string_vec_t& font_collections);
 	LLFontDescriptor normalize() const;
 
 	bool operator<(const LLFontDescriptor& b) const;
@@ -52,6 +53,8 @@ public:
 	void setSize(const std::string& size) { mSize = size; }
 	const std::vector<std::string>& getFileNames() const { return mFileNames; }
 	std::vector<std::string>& getFileNames() { return mFileNames; }
+	const std::vector<std::string>& getFontCollectionsList() const { return mFontCollectionsList; }
+	std::vector<std::string>& getFontCollectionsList() { return mFontCollectionsList; }
 	const U8 getStyle() const { return mStyle; }
 	void setStyle(U8 style) { mStyle = style; }
 
@@ -59,6 +62,7 @@ private:
 	std::string mName;
 	std::string mSize;
 	string_vec_t mFileNames;
+	string_vec_t mFontCollectionsList;
 	U8 mStyle;
 };
 
diff --git a/indra/llrender/llrender2dutils.cpp b/indra/llrender/llrender2dutils.cpp
index 4e2ebfd51e..4eb0203245 100644
--- a/indra/llrender/llrender2dutils.cpp
+++ b/indra/llrender/llrender2dutils.cpp
@@ -46,8 +46,6 @@
 // Globals
 //
 const LLColor4 UI_VERTEX_COLOR(1.f, 1.f, 1.f, 1.f);
-/*static*/ LLVector2		LLRender2D::sGLScaleFactor(1.f, 1.f);
-/*static*/ LLImageProviderInterface* LLRender2D::sImageProvider = NULL;
 
 //
 // Functions
@@ -108,10 +106,11 @@ void gl_rect_2d_offset_local( S32 left, S32 top, S32 right, S32 bottom, S32 pixe
 	top += LLFontGL::sCurOrigin.mY;
 
 	gGL.loadUIIdentity();
-	gl_rect_2d(llfloor((F32)left * LLRender2D::sGLScaleFactor.mV[VX]) - pixel_offset,
-				llfloor((F32)top * LLRender2D::sGLScaleFactor.mV[VY]) + pixel_offset,
-				llfloor((F32)right * LLRender2D::sGLScaleFactor.mV[VX]) + pixel_offset,
-				llfloor((F32)bottom * LLRender2D::sGLScaleFactor.mV[VY]) - pixel_offset,
+	LLRender2D *r2d_inst = LLRender2D::getInstance();
+	gl_rect_2d(llfloor((F32)left * r2d_inst->mGLScaleFactor.mV[VX]) - pixel_offset,
+				llfloor((F32)top * r2d_inst->mGLScaleFactor.mV[VY]) + pixel_offset,
+				llfloor((F32)right * r2d_inst->mGLScaleFactor.mV[VX]) + pixel_offset,
+				llfloor((F32)bottom * r2d_inst->mGLScaleFactor.mV[VY]) - pixel_offset,
 				filled);
 	gGL.popUIMatrix();
 }
@@ -800,7 +799,7 @@ void gl_stippled_line_3d( const LLVector3& start, const LLVector3& end, const LL
 	}
 	gGL.end();
 
-	LLRender2D::setLineWidth(1.f);
+	LLRender2D::getInstance()->setLineWidth(1.f);
 }
 
 void gl_arc_2d(F32 center_x, F32 center_y, F32 radius, S32 steps, BOOL filled, F32 start_angle, F32 end_angle)
@@ -967,7 +966,7 @@ void gl_rect_2d_checkerboard(const LLRect& rect, GLfloat alpha)
 	}
 	else
 	{ //polygon stipple is deprecated, use "Checker" texture
-		LLPointer<LLUIImage> img = LLRender2D::getUIImage("Checker");
+		LLPointer<LLUIImage> img = LLRender2D::getInstance()->getUIImage("Checker");
 		gGL.getTexUnit(0)->bind(img->getImage());
 		gGL.getTexUnit(0)->setTextureAddressMode(LLTexUnit::TAM_WRAP);
 		gGL.getTexUnit(0)->setTextureFilteringOption(LLTexUnit::TFO_POINT);
@@ -1567,25 +1566,26 @@ void gl_segmented_rect_3d_tex(const LLRectf& clip_rect, const LLRectf& center_uv
 
 }
 
-// static
-void LLRender2D::initClass(LLImageProviderInterface* image_provider,
-						   const LLVector2* scale_factor)
+LLRender2D::LLRender2D(LLImageProviderInterface* image_provider)
 {
-	sGLScaleFactor = (scale_factor == NULL) ? LLVector2(1.f, 1.f) : *scale_factor;
-	sImageProvider = image_provider;
+	mGLScaleFactor = LLVector2(1.f, 1.f);
+	mImageProvider = image_provider;
+	if(mImageProvider)
+	{
+		mImageProvider->addOnRemovalCallback(resetProvider);
+	}
 }
 
-// static
-void LLRender2D::cleanupClass()
+LLRender2D::~LLRender2D()
 {
-	if(sImageProvider)
+	if(mImageProvider)
 	{
-		sImageProvider->cleanUp();
+		mImageProvider->cleanUp();
+		mImageProvider->deleteOnRemovalCallback(resetProvider);
 	}
 }
 
 
-//static
 void LLRender2D::translate(F32 x, F32 y, F32 z)
 {
 	gGL.translateUI(x,y,z);
@@ -1594,14 +1594,12 @@ void LLRender2D::translate(F32 x, F32 y, F32 z)
 	LLFontGL::sCurDepth += z;
 }
 
-//static
 void LLRender2D::pushMatrix()
 {
 	gGL.pushUIMatrix();
 	LLFontGL::sOriginStack.push_back(std::make_pair(LLFontGL::sCurOrigin, LLFontGL::sCurDepth));
 }
 
-//static
 void LLRender2D::popMatrix()
 {
 	gGL.popUIMatrix();
@@ -1610,7 +1608,6 @@ void LLRender2D::popMatrix()
 	LLFontGL::sOriginStack.pop_back();
 }
 
-//static 
 void LLRender2D::loadIdentity()
 {
 	gGL.loadUIIdentity(); 
@@ -1619,25 +1616,22 @@ void LLRender2D::loadIdentity()
 	LLFontGL::sCurDepth = 0.f;
 }
 
-//static
 void LLRender2D::setScaleFactor(const LLVector2 &scale_factor)
 {
-	sGLScaleFactor = scale_factor;
+	mGLScaleFactor = scale_factor;
 }
 
-//static
 void LLRender2D::setLineWidth(F32 width)
 {
 	gGL.flush();
-	glLineWidth(width * lerp(sGLScaleFactor.mV[VX], sGLScaleFactor.mV[VY], 0.5f));
+	glLineWidth(width * lerp(mGLScaleFactor.mV[VX], mGLScaleFactor.mV[VY], 0.5f));
 }
 
-//static
 LLPointer<LLUIImage> LLRender2D::getUIImageByID(const LLUUID& image_id, S32 priority)
 {
-	if (sImageProvider)
+	if (mImageProvider)
 	{
-		return sImageProvider->getUIImageByID(image_id, priority);
+		return mImageProvider->getUIImageByID(image_id, priority);
 	}
 	else
 	{
@@ -1645,12 +1639,49 @@ LLPointer<LLUIImage> LLRender2D::getUIImageByID(const LLUUID& image_id, S32 prio
 	}
 }
 
-//static 
 LLPointer<LLUIImage> LLRender2D::getUIImage(const std::string& name, S32 priority)
 {
-	if (!name.empty() && sImageProvider)
-		return sImageProvider->getUIImage(name, priority);
+	if (!name.empty() && mImageProvider)
+		return mImageProvider->getUIImage(name, priority);
 	else
 		return NULL;
 }
 
+// static
+void LLRender2D::resetProvider()
+{
+    if (LLRender2D::instanceExists)
+    {
+        LLRender2D::getInstance()->mImageProvider = NULL;
+    }
+}
+
+// class LLImageProviderInterface
+
+LLImageProviderInterface::~LLImageProviderInterface()
+{
+    for (callback_list_t::iterator iter = mCallbackList.begin(); iter != mCallbackList.end();)
+    {
+        callback_list_t::iterator curiter = iter++;
+        (*curiter)();
+    }
+}
+
+void LLImageProviderInterface::addOnRemovalCallback(callback_t func)
+{
+    if (!func)
+    {
+        return;
+    }
+    mCallbackList.push_back(func);
+}
+
+void LLImageProviderInterface::deleteOnRemovalCallback(callback_t func)
+{
+    callback_list_t::iterator iter = std::find(mCallbackList.begin(), mCallbackList.end(), func);
+    if (iter != mCallbackList.end())
+    {
+        mCallbackList.erase(iter);
+    }
+}
+
diff --git a/indra/llrender/llrender2dutils.h b/indra/llrender/llrender2dutils.h
index cce3b4ed51..70ab006fd6 100644
--- a/indra/llrender/llrender2dutils.h
+++ b/indra/llrender/llrender2dutils.h
@@ -121,39 +121,54 @@ inline void gl_rect_2d_offset_local( const LLRect& rect, S32 pixel_offset, BOOL
 
 class LLImageProviderInterface;
 
-class LLRender2D
+class LLRender2D : public LLParamSingleton<LLRender2D>
 {
+	LLSINGLETON(LLRender2D, LLImageProviderInterface* image_provider);
 	LOG_CLASS(LLRender2D);
+	~LLRender2D();
 public:
-	static void initClass(LLImageProviderInterface* image_provider,
-						  const LLVector2* scale_factor);
-	static void cleanupClass();
+	void pushMatrix();
+	void popMatrix();
+	void loadIdentity();
+	void translate(F32 x, F32 y, F32 z = 0.0f);
 
-	static void pushMatrix();
-	static void popMatrix();
-	static void loadIdentity();
-	static void translate(F32 x, F32 y, F32 z = 0.0f);
+	void setLineWidth(F32 width);
+	void setScaleFactor(const LLVector2& scale_factor);
 
-	static void setLineWidth(F32 width);
-	static void setScaleFactor(const LLVector2& scale_factor);
+	LLPointer<LLUIImage> getUIImageByID(const LLUUID& image_id, S32 priority = 0);
+	LLPointer<LLUIImage> getUIImage(const std::string& name, S32 priority = 0);
 
-	static LLPointer<LLUIImage> getUIImageByID(const LLUUID& image_id, S32 priority = 0);
-	static LLPointer<LLUIImage> getUIImage(const std::string& name, S32 priority = 0);
+	LLVector2		mGLScaleFactor;
+
+protected:
+	// since LLRender2D has no control of image provider's lifecycle
+	// we need a way to tell LLRender2D that provider died and
+	// LLRender2D needs to be updated.
+	static void resetProvider();
 
-	static LLVector2		sGLScaleFactor;
 private:
-	static LLImageProviderInterface* sImageProvider;
+	LLImageProviderInterface* mImageProvider;
 };
 
 class LLImageProviderInterface
 {
 protected:
 	LLImageProviderInterface() {};
-	virtual ~LLImageProviderInterface() {};
+	virtual ~LLImageProviderInterface();
 public:
 	virtual LLPointer<LLUIImage> getUIImage(const std::string& name, S32 priority) = 0;
 	virtual LLPointer<LLUIImage> getUIImageByID(const LLUUID& id, S32 priority) = 0;
 	virtual void cleanUp() = 0;
+
+	// to notify holders when pointer gets deleted
+	typedef void(*callback_t)();
+	void addOnRemovalCallback(callback_t func);
+	void deleteOnRemovalCallback(callback_t func);
+
+private:
+
+	typedef std::list< callback_t >	callback_list_t;
+	callback_list_t mCallbackList;
 };
 
 
diff --git a/indra/llrender/lluiimage.cpp b/indra/llrender/lluiimage.cpp
index 5d8f92b2e6..c8337feabb 100644
--- a/indra/llrender/lluiimage.cpp
+++ b/indra/llrender/lluiimage.cpp
@@ -120,12 +120,12 @@ void LLUIImage::draw3D(const LLVector3& origin_agent, const LLVector3& x_axis, c
 		 }
 	}
 
-	LLRender2D::pushMatrix();
+	LLRender2D::getInstance()->pushMatrix();
 	{ 
 		LLVector3 rect_origin = origin_agent + (rect.mLeft * x_axis) + (rect.mBottom * y_axis); 
-		LLRender2D::translate(rect_origin.mV[VX],
-						rect_origin.mV[VY], 
-						rect_origin.mV[VZ]);
+		LLRender2D::getInstance()->translate(rect_origin.mV[VX],
+											rect_origin.mV[VY], 
+											rect_origin.mV[VZ]);
 		gGL.getTexUnit(0)->bind(getImage());
 		gGL.color4fv(color.mV);
 
@@ -142,7 +142,7 @@ void LLUIImage::draw3D(const LLVector3& origin_agent, const LLVector3& x_axis, c
 								rect.getWidth() * x_axis, 
 								rect.getHeight() * y_axis);
 		
-	} LLRender2D::popMatrix();
+	} LLRender2D::getInstance()->popMatrix();
 }
 
 
@@ -199,7 +199,7 @@ namespace LLInitParam
 			return;
 		}
 
-		LLUIImage* imagep =  LLRender2D::getUIImage(name());
+		LLUIImage* imagep =  LLRender2D::getInstance()->getUIImage(name());
 		if (imagep)
 		{
 			updateValue(imagep);