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DirectXTK and PNG transparency

Graphics and GPU Programming Programming

Started by Stuntdk December 05, 2012 08:20 PM

1 comment, last by MJP 11 years, 5 months ago

Stuntdk

511

Author

December 05, 2012 08:20 PM

Hi,

I am trying out the Spritebatch function in DirectXTK, but I am having problems with transparency in .png images.
My code is based on a stripped down version of this example http://directxtk.cod...cussions/390346

The sprite png image is from Microsoft XNA Shooter example "player.png"

Any ideas how I can get transparency with DirectXTK?

Thanks!

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Stuntdk

511

Author

December 06, 2012 04:09 PM

I have found out why I had this problem, turns out that DirectXTK Spritebatch expects an image with pre-multiplied alpha.
The source images I had were not pre-multiplied.

Found a nice little application that could do the image translation easily http://www.qualibyte.com/pixelformer/

20,296

December 06, 2012 09:43 PM

You can also just pass your own blend state to SpriteBatch::Begin if you don't want to use pre-multiplied alpha.

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