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  • 0 comments  /  posted by  Silverlight Show  on  Oct 09, 2009 (8 months ago)
    In this post Gavin Wignall explains about the blur and the shadow effects that are available in the Expression Blend 3 tool.

    Silverlight 3 introduced the ability to use Pixel Shaders with 2 native effects built in and available in the Expression Blend 3 tool. The two Pixel Shaders that Blend currently offers are ‘Drop Shadow‘ and ‘Blur‘. The Drop Shadow effect is even able to convert Photoshop Drop Shadow effects reasonably well through the new ‘Import Adobe Photoshop File‘ feature.

    Both the ‘Blur‘ and ‘DropShadow‘ effect will work on any item inside your project, including vector shapes, text and images (even with transparent areas).

  • 5 comments  /  posted by  Nikolay Raychev  on  Apr 02, 2009 (more than a year ago)
    Silverlight 3 comes with two built in Pixel Shaders:

    We have the following image:

    We want to blur it:

    <Image Width="300"   
            <BlurEffect Radius="8"></BlurEffect>

    We have the following result:

    Note the Radius parameter. The bigger the radius is, the more blurred the picture is.

    Now let's make a shadowed picture:

    <Image Width="300"   
            <DropShadowEffect BlurRadius="30" Color="Gray"
                Direction="-45" Opacity="0.5" ShadowDepth="20">

    The result:


    The DropShadow effect has several parameters:
    • BlurRadius - the bigger the radius is, the more blurred the shadow is.
    • Color - the shadow color.
    • Direction - an angle specifying the direction of the shadow. If you set it to zero the shadow will fall on the right side.
    • Opacity - the shadow opacity.
    • ShadowDepth - it specifies how far (deep) from the picture the shadow will appear.

    You can define your own Pixel Shaders using a special language called HLSL. But this is beyond the scope of this tip.

  • 0 comments  /  posted by  Silverlight Show  on  Mar 24, 2009 (more than a year ago)
    Pete Brown will show you how to use a blur effect to make dialogs pop in Silverlight 3.

    When an application needs to display a dialog, there needs to be something to make the user immediately focus on that dialog, even when there are lots of other elements on the screen

    Most AJAX applications dim the screen behind a dialog by using a semi-transparent overlay. That certainly works well, but another effect to consider is a blur effect.

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