Behavior of TileMode property with its values in ImageBrush object

1) TileMode ="FlipX"

       <Grid.Background>
            <ImageBrush TileMode="FlipX" Viewport="0,0,.5,.5"
                ImageSource="C:\Users\Public\Pictures\Sample Pictures\Tulips.jpg">
            </ImageBrush>
        </Grid.Background>

2)  TileMode ="FlipY"

      <Grid.Background>
            <ImageBrush TileMode="FlipY" Viewport="0,0,.5,.5"
                ImageSource="C:\Users\Public\Pictures\Sample Pictures\Tulips.jpg">
            </ImageBrush>
        </Grid.Background>

3) TileMode ="FlipXY"

    <Grid.Background>
            <ImageBrush TileMode="FlipXY" Viewport="0,0,.5,.5"
                ImageSource="C:\Users\Public\Pictures\Sample Pictures\Tulips.jpg">
            </ImageBrush>
        </Grid.Background>