add support for Right to Left fonts

stepmania/src/BitmapText.cpp

@@ -198,12 +198,17 @@ void BitmapText::BuildChars()
 		case align_right:	iX = -iLineWidth;	break;
 		default:			ASSERT( false );	return;
 		}
+		if( m_pFont->IsRightToLeft() )
+			iX += iLineWidth;
 
 		for( unsigned j=0; j<szLine.size(); j++ )	// for each character in the line
 		{
 			RageSpriteVertex v[4];
 			const glyph &g = m_pFont->GetGlyph(szLine[j]);
 
+			if( m_pFont->IsRightToLeft() )
+				iX -= g.m_iHadvance;
+
 			/* set vertex positions */
 			v[0].p = RageVector3( iX+g.m_fHshift,				iY+g.m_pPage->m_fVshift,		  0 );	// top left
 			v[1].p = RageVector3( iX+g.m_fHshift,				iY+g.m_pPage->m_fVshift+g.m_fHeight, 0 );	// bottom left
@@ -221,6 +226,9 @@ void BitmapText::BuildChars()
 
 			m_aVertices.insert( m_aVertices.end(), &v[0], &v[4] );
 			m_pTextures.push_back( g.GetTexture() );
+
+			if( m_pFont->IsRightToLeft() )
+				iX -= g.m_iHadvance;
 		}
 
 		/* The amount of padding a line needs: */

stepmania/src/Font.cpp

@@ -691,6 +691,7 @@ void Font::Load( const CString &sIniPath, CString sChars )
 		ini.ReadFile( sIniPath );
 		ini.RenameKey("Char Widths", "main");
 		ini.GetValue( "main", "CapitalsOnly", bCapitalsOnly );
+		ini.GetValue( "main", "RightToLeft", m_bRightToLeft );
 	}
 
 	{

stepmania/src/Font.h

@@ -136,6 +136,8 @@ public:
 
 	static const wchar_t DEFAULT_GLYPH;
 
+	bool IsRightToLeft() const { return m_bRightToLeft; };
+
 private:
 	/* List of pages and fonts that we use (and are responsible for freeing). */
 	vector<FontPage *> m_apPages;
@@ -148,6 +150,11 @@ private:
 	map<longchar,glyph*> m_iCharToGlyph;
 	glyph *m_iCharToGlyphCache[128];
 
+	// True for Hebrew, Arabic, Urdu fonts.
+	// This will also change the way glyphs from the default FontPage are rendered. 
+	// There may be a better way to handle this.
+	bool m_bRightToLeft;
+
 	/* We keep this around only for reloading. */
 	CString m_sChars;