WP7备注(18)(OpacityMask)

<Image Source="Images/BuzzAldrinOnTheMoon.png"
Stretch="None"
VerticalAlignment="Top" />
<Image Source="Images/BuzzAldrinOnTheMoon.png"
Stretch="None"
VerticalAlignment="Top"
RenderTransformOrigin="0.5 1">
<Image.RenderTransform>
<ScaleTransform ScaleY="-1" />
</Image.RenderTransform>
<Image.OpacityMask>
<LinearGradientBrush StartPoint="0 0" EndPoint="0 1">
<GradientStop Offset="0" Color="#00000000" />
<GradientStop Offset="1" Color="#40000000" />
</LinearGradientBrush>
</Image.OpacityMask>
</Image>