MAINT-2980 Rename "Texture Memory" to "Video Memory" in hardware floater and increase limit.

Limit should be however much vram is installed, but underneath the hood, fudge
how much memory is used for textures to avoid swapping.

Also, catch exceptions when attempting to build a GL context on windows and
display an error dialog instead of crashing.

indra/llwindow/llwindowwin32.cpp

@@ -85,6 +85,18 @@ void show_window_creation_error(const std::string& title)
 	LL_WARNS("Window") << title << LL_ENDL;
 }
 
+HGLRC SafeCreateContext(HDC hdc)
+{
+	__try 
+	{
+		return wglCreateContext(hdc);
+	}
+	__except(EXCEPTION_EXECUTE_HANDLER)
+	{ 
+		return NULL;
+	}
+}
+
 //static
 BOOL LLWindowWin32::sIsClassRegistered = FALSE;
 
@@ -1166,14 +1178,15 @@ BOOL LLWindowWin32::switchContext(BOOL fullscreen, const LLCoordScreen &size, BO
 		return FALSE;
 	}
 
-	if (!(mhRC = wglCreateContext(mhDC)))
+
+	if (!(mhRC = SafeCreateContext(mhDC)))
 	{
 		close();
 		OSMessageBox(mCallbacks->translateString("MBGLContextErr"),
 			mCallbacks->translateString("MBError"), OSMB_OK);
 		return FALSE;
 	}
-
+		
 	if (!wglMakeCurrent(mhDC, mhRC))
 	{
 		close();

indra/newview/llfloaterhardwaresettings.cpp

@@ -87,15 +87,30 @@ void LLFloaterHardwareSettings::refresh()
 	refreshEnabledState();
 }
 
+void LLFloaterHardwareSettings::onSetVRAM()
+{
+	S32 vram = childGetValue("GraphicsCardTextureMemory").asInteger();
+
+	//give the texture system plenty of leeway to avoid swapping
+	vram /= 3;
+
+	gSavedSettings.setS32("TextureMemory", vram);
+}
+
 void LLFloaterHardwareSettings::refreshEnabledState()
 {
     F32 mem_multiplier = gSavedSettings.getF32("RenderTextureMemoryMultiple");
     
 	S32 min_tex_mem = LLViewerTextureList::getMinVideoRamSetting();
-	S32 max_tex_mem = LLViewerTextureList::getMaxVideoRamSetting(false, mem_multiplier);
+	S32 max_tex_mem = LLViewerTextureList::getMaxVideoRamSetting(true, mem_multiplier);
 	getChild<LLSliderCtrl>("GraphicsCardTextureMemory")->setMinValue(min_tex_mem);
 	getChild<LLSliderCtrl>("GraphicsCardTextureMemory")->setMaxValue(max_tex_mem);
 
+	S32 vram = gSavedSettings.getS32("TextureMemory");
+	vram = vram*3;
+
+	getChild<LLSliderCtrl>("GraphicsCardTextureMemory")->setValue(vram);
+	getChild<LLSliderCtrl>("GraphicsCardTextureMemory")->setCommitCallback(boost::bind(&LLFloaterHardwareSettings::onSetVRAM, this));
 	if (!LLFeatureManager::getInstance()->isFeatureAvailable("RenderVBOEnable") ||
 		!gGLManager.mHasVertexBufferObject)
 	{

indra/newview/llfloaterhardwaresettings.h

@@ -64,6 +64,8 @@ public:
 	/// don't apply the changed values
 	void cancel();
 
+	void onSetVRAM();
+
 	/// refresh the enabled values
 	void refreshEnabledState();
 

indra/newview/llviewertexture.h

@@ -40,7 +40,7 @@
 #include <list>
 
 #define MIN_VIDEO_RAM_IN_MEGA_BYTES    32
-#define MAX_VIDEO_RAM_IN_MEGA_BYTES    512 // 512MB max for performance reasons.
+#define MAX_VIDEO_RAM_IN_MEGA_BYTES    4096
 
 class LLImageGL ;
 class LLImageRaw;

indra/newview/llviewertexturelist.cpp

@@ -1270,7 +1270,7 @@ S32 LLViewerTextureList::getMaxVideoRamSetting(bool get_recommended, float mem_m
 		//  - it's going to be swapping constantly regardless
 		S32 max_vram = gGLManager.mVRAM;
 
-		if(gGLManager.mIsATI)
+		if(!get_recommended && gGLManager.mIsATI)
 		{
 			//shrink the availabe vram for ATI cards because some of them do not handel texture swapping well.
 			max_vram = (S32)(max_vram * 0.75f);  
@@ -1285,15 +1285,15 @@ S32 LLViewerTextureList::getMaxVideoRamSetting(bool get_recommended, float mem_m
 	{
 		if (!get_recommended)
 		{
-			max_texmem = 512;
+			max_texmem = 2048;
 		}
 		else if (gSavedSettings.getBOOL("NoHardwareProbe")) //did not do hardware detection at startup
 		{
-			max_texmem = 512;
+			max_texmem = 2048;
 		}
 		else
 		{
-			max_texmem = 128;
+			max_texmem = 512;
 		}
 
 		llwarns << "VRAM amount not detected, defaulting to " << max_texmem << " MB" << llendl;
@@ -1301,10 +1301,7 @@ S32 LLViewerTextureList::getMaxVideoRamSetting(bool get_recommended, float mem_m
 
 	S32 system_ram = (S32)BYTES_TO_MEGA_BYTES(gSysMemory.getPhysicalMemoryClamped()); // In MB
 	//llinfos << "*** DETECTED " << system_ram << " MB of system memory." << llendl;
-	if (get_recommended)
-		max_texmem = llmin(max_texmem, (S32)(system_ram/2));
-	else
-		max_texmem = llmin(max_texmem, (S32)(system_ram));
+	max_texmem = llmin(max_texmem, (S32)(system_ram));
     
     // limit the texture memory to a multiple of the default if we've found some cards to behave poorly otherwise
 	max_texmem = llmin(max_texmem, (S32) (mem_multiplier * (F32) max_texmem));
@@ -1334,7 +1331,7 @@ void LLViewerTextureList::updateMaxResidentTexMem(S32 mem)
 	mem = llclamp(mem, getMinVideoRamSetting(), getMaxVideoRamSetting(false, mem_multiplier));
 	if (mem != cur_mem)
 	{
-		gSavedSettings.setS32("TextureMemory", mem);
+		gSavedSettings.setS32("TextureMemory", mem/3);
 		return; //listener will re-enter this function
 	}
 

indra/newview/skins/default/xui/en/floater_hardware_settings.xml

@@ -155,13 +155,12 @@
      tool_tip="Compresses textures in video memory, allowing for higher resolution textures to be loaded at the cost of some color quality."
      width="315" />
     <slider
-     control_name="TextureMemory"
      decimal_digits="0"
      follows="left|top"
      height="20"
      increment="16"
      initial_value="32"
-     label="Texture Memory (MB):"
+     label="Video Memory (MB):"
      label_width="195"
      layout="topleft"
      left="10"