SL-16141 Load fonts and generate glyphs on startup

indra/llrender/llfontgl.cpp

@@ -547,9 +547,19 @@ F32 LLFontGL::getWidthF32(const llwchar* wchars, S32 begin_offset, S32 max_chars
 	return cur_x / sScaleX;
 }
 
+void LLFontGL::generateASCIIglyphs()
+{
+    LL_PROFILE_ZONE_SCOPED
+    for (U32 i = 32; (i < 127); i++)
+    {
+        mFontFreetype->getGlyphInfo(i);
+    }
+}
+
 // Returns the max number of complete characters from text (up to max_chars) that can be drawn in max_pixels
 S32 LLFontGL::maxDrawableChars(const llwchar* wchars, F32 max_pixels, S32 max_chars, EWordWrapStyle end_on_word_boundary) const
 {
+	LL_PROFILE_ZONE_SCOPED
 	if (!wchars || !wchars[0] || max_chars == 0)
 	{
 		return 0;
@@ -829,6 +839,8 @@ void LLFontGL::initClass(F32 screen_dpi, F32 x_scale, F32 y_scale, const std::st
 	{
 		sFontRegistry->reset();
 	}
+
+	LLFontGL::loadDefaultFonts();
 }
 
 // Force standard fonts to get generated up front.
@@ -838,6 +850,7 @@ void LLFontGL::initClass(F32 screen_dpi, F32 x_scale, F32 y_scale, const std::st
 // static
 bool LLFontGL::loadDefaultFonts()
 {
+	LL_PROFILE_ZONE_SCOPED
 	bool succ = true;
 	succ &= (NULL != getFontSansSerifSmall());
 	succ &= (NULL != getFontSansSerif());
@@ -845,10 +858,18 @@ bool LLFontGL::loadDefaultFonts()
 	succ &= (NULL != getFontSansSerifHuge());
 	succ &= (NULL != getFontSansSerifBold());
 	succ &= (NULL != getFontMonospace());
-	succ &= (NULL != getFontExtChar());
 	return succ;
 }
 
+void LLFontGL::loadCommonFonts()
+{
+    LL_PROFILE_ZONE_SCOPED
+    getFont(LLFontDescriptor("SansSerif", "Small", BOLD));
+    getFont(LLFontDescriptor("SansSerif", "Large", BOLD));
+    getFont(LLFontDescriptor("SansSerif", "Huge", BOLD));
+    getFont(LLFontDescriptor("Monospace", "Medium", 0));
+}
+
 // static
 void LLFontGL::destroyDefaultFonts()
 {
@@ -1015,7 +1036,7 @@ LLFontGL* LLFontGL::getFontSansSerifBig()
 //static 
 LLFontGL* LLFontGL::getFontSansSerifHuge()
 {
-	static LLFontGL* fontp = getFont(LLFontDescriptor("SansSerif","Large",0));
+	static LLFontGL* fontp = getFont(LLFontDescriptor("SansSerif","Huge",0));
 	return fontp;
 }
 
@@ -1026,12 +1047,6 @@ LLFontGL* LLFontGL::getFontSansSerifBold()
 	return fontp;
 }
 
-//static
-LLFontGL* LLFontGL::getFontExtChar()
-{
-	return getFontSansSerif();
-}
-
 //static 
 LLFontGL* LLFontGL::getFont(const LLFontDescriptor& desc)
 {

indra/llrender/llfontgl.h

@@ -160,12 +160,15 @@ public:
 
 	const LLFontDescriptor& getFontDesc() const;
 
+	void generateASCIIglyphs();
+
 
 	static void initClass(F32 screen_dpi, F32 x_scale, F32 y_scale, const std::string& app_dir, bool create_gl_textures = true);
 
 	// Load sans-serif, sans-serif-small, etc.
 	// Slow, requires multiple seconds to load fonts.
 	static bool loadDefaultFonts();
+    static void loadCommonFonts();
 	static void	destroyDefaultFonts();
 	static void destroyAllGL();
 
@@ -190,7 +193,6 @@ public:
 	static LLFontGL* getFontSansSerifBig();
 	static LLFontGL* getFontSansSerifHuge();
 	static LLFontGL* getFontSansSerifBold();
-	static LLFontGL* getFontExtChar();
 	static LLFontGL* getFont(const LLFontDescriptor& desc);
 	// Use with legacy names like "SANSSERIF_SMALL" or "OCRA"
 	static LLFontGL* getFontByName(const std::string& name);

indra/llrender/llfontregistry.cpp

@@ -597,6 +597,11 @@ LLFontGL *LLFontRegistry::getFont(const LLFontDescriptor& desc)
 					<<" style=[" << ((S32) desc.getStyle()) << "]"
 					<< " size=[" << desc.getSize() << "]" << LL_ENDL;
 		}
+		else
+		{
+			//generate glyphs for ASCII chars to avoid stalls later
+			fontp->generateASCIIglyphs();
+		}
 		return fontp;
 	}
 }

indra/newview/llviewerwindow.cpp

@@ -1963,6 +1963,13 @@ LLViewerWindow::LLViewerWindow(const Params& p)
 	}
 	
 	LLFontManager::initClass();
+	// Init font system, load default fonts and generate basic glyphs
+	// currently it takes aprox. 0.5 sec and we would load these fonts anyway
+	// before login screen.
+	LLFontGL::initClass( gSavedSettings.getF32("FontScreenDPI"),
+		mDisplayScale.mV[VX],
+		mDisplayScale.mV[VY],
+		gDirUtilp->getAppRODataDir());
 
 	//
 	// We want to set this stuff up BEFORE we initialize the pipeline, so we can turn off
@@ -2009,14 +2016,6 @@ LLViewerWindow::LLViewerWindow(const Params& p)
 	LLViewerTextureManager::init() ;
 	gBumpImageList.init();
 	
-	// Init font system, but don't actually load the fonts yet
-	// because our window isn't onscreen and they take several
-	// seconds to parse.
-	LLFontGL::initClass( gSavedSettings.getF32("FontScreenDPI"),
-								mDisplayScale.mV[VX],
-								mDisplayScale.mV[VY],
-								gDirUtilp->getAppRODataDir());
-	
 	// Create container for all sub-views
 	LLView::Params rvp;
 	rvp.name("root");
@@ -2102,6 +2101,8 @@ void LLViewerWindow::initBase()
 	LL_DEBUGS("AppInit") << "initializing edit menu" << LL_ENDL;
 	initialize_edit_menu();
 
+    LLFontGL::loadCommonFonts();
+
 	// Create the floater view at the start so that other views can add children to it. 
 	// (But wait to add it as a child of the root view so that it will be in front of the 
 	// other views.)
@@ -5499,8 +5500,6 @@ void LLViewerWindow::initFonts(F32 zoom_factor)
 								mDisplayScale.mV[VX] * zoom_factor,
 								mDisplayScale.mV[VY] * zoom_factor,
 								gDirUtilp->getAppRODataDir());
-	// Force font reloads, which can be very slow
-	LLFontGL::loadDefaultFonts();
 }
 
 void LLViewerWindow::requestResolutionUpdate()