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How do I make the opacity mask in Compact Framework?

I am looking for a way that I can make the opacity mask in Compact Framework?

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I don't think the CF version of the .NET version supports opacity. Also makes sense. Calculating opacity is a very expensive operation, one of which is not suitable for low-power devices.



This means a possible workaround.

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You can roll your own bitmap opacity mask by simply doing pixel manipulation yourself. Super-slow way to do this would be to use Bitmap methods GetPixel

and SetPixel

, but much faster way - use LockBits method. Cm:

http://www.bobpowell.net/lockingbits.htm



Depending on what you are doing, Windows Mobile devices have incredible processing power for this kind of thing. It only takes a few milliseconds to iterate and process a 76,800 pixel 320x240 bitmap using LockBits (depending on how complex the "processing" is, of course). Opacity masking (presumably) involves just comparing the two pixel values ​​and possibly calculating the third, so this is not a problem.

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