Add the possibility to flip fonts in impact

flipFont.js

// Add the possibility to flip fonts in impact
// This adds two parameters to the draw method of ig.Font
// Use it like this:
// this.font.draw( 'It Works!', x, y, ig.Font.ALIGN.CENTER, true, true );
// The last two values are the new parameters, the first flips horizontally and the second vertically

// Use like you want to, just don't blame me for anything.

ig.module( 'plugins.flipFont' )
.requires(
  'impact.font'
)
.defines(function() {

  ig.Font.inject({
    
    draw: function( text, x, y, align, flipX, flipY ) {
      if ( typeof(text) != 'string' ) {
        text = text.toString();
      }

      if ( align == ig.Font.ALIGN.RIGHT || align == ig.Font.ALIGN.CENTER ) {
        var width = 0;
        for ( var i = 0; i < text.length; i++ ) {
          var c = text.charCodeAt(i);
          width += this.widthMap[c - this.firstChar] + 1;
        }
        x -= align == ig.Font.ALIGN.CENTER ? width/2 : width;
      }

      if ( flipX ) {
        for ( var i = text.length; i--; ) {
          var c = text.charCodeAt(i);
          x += this._drawChar( c - this.firstChar, x, y, flipX, flipY );
        }
      }
      else {
        for ( var i = 0; i < text.length; i++ ) {
          var c = text.charCodeAt(i);
          x += this._drawChar( c - this.firstChar, x, y );
        }
      }
      
      ig.Image.drawCount += text.length;
    },
    
    _drawChar: function( c, targetX, targetY, flipX, flipY ) {
      if ( !this.loaded || c < 0 || c >= this.indices.length ) { return 0; }

      var scale = ig.system.scale,
          charX = this.indices[c] * scale,
          charY = 0,
          charWidth = this.widthMap[c] * scale,
          charHeight = (this.height-2) * scale,
          scaleX = flipX ? -1 : 1,
          scaleY = flipY ? -1 : 1;

      if ( flipX || flipY ) {
        ig.system.context.save();
        ig.system.context.translate( 
          ig.system.getDrawPos( targetX ) + ( flipX ? charWidth : 0 ), 
          ig.system.getDrawPos( targetY ) + ( flipY ? charHeight - ( 2 * ig.system.scale ) : 0 )
        );
        ig.system.context.scale( scaleX, scaleY );
        
        ig.system.context.drawImage( 
          this.data,
          charX, charY,
          charWidth, charHeight,
          0, 0, 
          charWidth, charHeight
        );
        
        ig.system.context.restore();
      }
      else {
        ig.system.context.drawImage( 
          this.data,
          charX, charY,
          charWidth, charHeight,
          ig.system.getDrawPos( targetX ), 
          ig.system.getDrawPos( targetY ), 
          charWidth, charHeight
        );
      }

      return this.widthMap[c] + 1;
    }
    
  });

});