WP7 - Splash Screen doesn't display correctly on launch

What I'm trying to do:

I've added a splash screen to an application I'm creating for Windows Phone 7. I did this simply by replacing the pre-existing splash screen file with my own.

What goes wrong:

The splash screen is not displayed like it should be - 开发者_如何学Cit is being down sampled to an 8 bit image or something weird:

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The image I'm using

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The image that gets displayed

It's a bit hard to see depending on your monitor, but on a phone it's reasonably obvious. There are fuzzy greenish lines that appear - basically like the image is being down sampled or the quality worsened.

Any idea what I'm doing wrong, or what might be happening?

Thanks.

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Try forcing the app to display images at 32 bits per pixel (instead of the default of 16)

Add an attribute of BitsPerPixel="32" to the app element in WMAppManifest.xml
See http://forums.create.msdn.com/forums/p/85960/520394.aspx#520394

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The problem is that the gradient on your splash screen is causing banding, which you can solve by dithering. Robby Ingebretsen has an action for PhotoShop that you can use: http://nerdplusart.com/photoshop-action-for-windows-phone-7-dithering

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I suspect the emulator. Run the emulator at full size or run the app on an actual device.

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Windows Phone is currently only supporting a color depth of 16bit, causing especially some gradients displaying downsampled for 24bit images. Some first generation firmwares by HTC had a "bug" that also allowed 24bit. Theoretically it is just a registry key, but you cannot commonly change it. Microsoft has limited the color depth to 16bit for the benefit of performance, but as far as I knnow there are some second-generation models without this limitation now.

You may try to downsample the image in Photoshop to 16bit and optimize it for this color depth.