Simplify exception handling. Improve fallback if we can't set up an

OpenGL window.

stepmania/src/RageDisplay.cpp

@@ -92,7 +92,7 @@ bool RageDisplay::SetVideoMode( VideoModeParams p )
 	if( this->TryVideoMode(p,bNeedReloadTextures) )
 		return bNeedReloadTextures;
 
-	RageException::Throw( "SetVideoMode failed.  Tried to fall back to other modes, but nothing worked." );
+	RageException::ThrowNonfatal( "SetVideoMode failed.  Tried to fall back to other modes, but nothing worked." );
 }
 
 void RageDisplay::ProcessStatsOnFlip()

stepmania/src/RageDisplay_OGL.cpp

@@ -232,7 +232,7 @@ static void FlushGLErrors()
 		;
 }
 
-RageDisplay_OGL::RageDisplay_OGL( VideoModeParams p )
+RageDisplay_OGL::RageDisplay_OGL( VideoModeParams p, bool bAllowUnacceleratedRenderer )
 {
 	LOG->Trace( "RageDisplay_OGL::RageDisplay_OGL()" );
 	LOG->MapLog("renderer", "Current renderer: OpenGL");
@@ -241,15 +241,31 @@ RageDisplay_OGL::RageDisplay_OGL( VideoModeParams p )
 
 	wind = MakeLowLevelWindow();
 
-	SetVideoMode( p );
+	try {
+		SetVideoMode( p );
+	} catch(...) {
+		/* SetVideoMode can throw. */
+		delete wind;
+		throw;
+	}
 
 	// Log driver details
 	LOG->Info("OGL Vendor: %s", glGetString(GL_VENDOR));
 	LOG->Info("OGL Renderer: %s", glGetString(GL_RENDERER));
 	LOG->Info("OGL Version: %s", glGetString(GL_VERSION));
 	LOG->Info("OGL Extensions: %s", glGetString(GL_EXTENSIONS));
+
 	if( IsSoftwareRenderer() )
+	{
+		if( !bAllowUnacceleratedRenderer )
+		{
+			delete wind;
+			RageException::ThrowNonfatal(
+				"Your system is reporting that OpenGL hardware acceleration is not available.  "
+				"Please obtain an updated driver from your video card manufacturer.\n\n" );
+		}
 		LOG->Warn("This is a software renderer!");
+	}
 
 
 	/* Log this, so if people complain that the radar looks bad on their

stepmania/src/RageDisplay_OGL.h

@@ -4,7 +4,7 @@
 class RageDisplay_OGL: public RageDisplay
 {
 public:
-	RageDisplay_OGL( VideoModeParams params );
+	RageDisplay_OGL( VideoModeParams params, bool bAllowUnacceleratedRenderer );
 	virtual ~RageDisplay_OGL();
 	void Update(float fDeltaTime);
 

stepmania/src/StepMania.cpp

@@ -378,17 +378,12 @@ RageDisplay *CreateDisplay()
 			 * SDL may throw, but that only happens with broken driver installations, and
 			 * we probably don't want to fall back on D3D in that case anyway.) */
 			error += "Initializing OpenGL...\n";
-
-			RageDisplay *ret = new RageDisplay_OGL( params );
-			
-			if( PREFSMAN->m_bAllowUnacceleratedRenderer || !ret->IsSoftwareRenderer() )
-				return ret;
-			else
-			{
-				error += "Your system is reporting that OpenGL hardware acceleration is not available.  "
-					"Please obtain an updated driver from your video card manufacturer.\n\n";
-				delete ret;
-			}
+			try {
+				return new RageDisplay_OGL( params, PREFSMAN->m_bAllowUnacceleratedRenderer );
+			} catch(RageException e) {
+				error += CString(e.what()) + "\n";
+				continue;
+			};
 #endif
 		}
 		else if( sRenderer.CompareNoCase("d3d")==0 )
@@ -402,6 +397,8 @@ RageDisplay *CreateDisplay()
 			} catch(RageException_D3DNoAcceleration e) {
 				error += "Your system is reporting that Direct3D hardware acceleration is not available.  "
 					"Please obtain an updated driver from your video card manufacturer.\n\n";
+			} catch(RageException e) {
+				error += CString(e.what()) + "\n";
 			};
 #endif
 		}