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Microsoft® Silverlight® Edition: Programming Windows® Phone 7 by Charles Petzold

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Becoming a Photo Extras Application

Architecturally and functionally, the Posterizer program that concludes this chapter is similar to the Monochromize program. It lets the user select a photo from the picture library and to save it back in the Saved Pictures album. But the Posterizer program allows the user to reduce the bit resolution of each color independently (creating a poster-like effect) and for this it needs to display a row of RadioButton elements. The program must also retain the original unadulterated pixels array so it can restore the image to full color resolution.

In addition, Posterizer registers itself as a “photos extra” application, which means that it can be invoked by the user from the picture library itself.

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