问题
I need SpriteBatch to render images how I would expect in WPF or a normal UIKit app:
- partially transparent PNGs render on top of one another, as you would expect
- I have an alpha I can modify, preferably something like using
Color.Whiteand modifying theAvalue.
Closest has been using BlendState.NonPremultiplied, but I get weird lines where partially transparent PNGs overlap on one another.
I was having similar issues on Windows (see here), but fixed it by changing the Premultiplied setting in the XNA content project. How can I do similar for MonoGame? (I'm expecting there is a difference in OpenGL here)
回答1:
We solved it by using two different setups.
On Windows and XNA:
- Use
BlendState.NonPremultiplied - Change the default setting to Premultiply = False on the content project for all PNGs
- To modify Alpha value of a sprite, use
Color.Whiteand setAvalue
On MonoGame and iOS:
- Use
BlendState.AlphaBlend - Leave PNGs as-is
- To modify Alpha value of a sprite, use
Color.White * (float)Alpha / (float)byte.MaxValue
My PNGs are not pre-multiplied and are used exactly as you'd expect coming out of Photoshop.
来源：https://stackoverflow.com/questions/10463629/monogame-blendstate-2d-spritebatch