MonoGame-BlendState-2D SpriteBatch [英] MonoGame - BlendState - 2D SpriteBatch

问题描述

我需要SpriteBatch来呈现在WPF或普通UIKit应用中所期望的图像:

I need SpriteBatch to render images how I would expect in WPF or a normal UIKit app:

如您所料，
• 部分透明的PNG会相互渲染
• 我有一个可以修改的Alpha，最好是使用Color.White并修改A值的东西.

• 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.White and modifying the A value.

最近的一直在使用BlendState.NonPremultiplied，但是我得到了奇怪的线条，其中部分透明的PNG彼此重叠.

Closest has been using BlendState.NonPremultiplied, but I get weird lines where partially transparent PNGs overlap on one another.

我在Windows (请参阅此处)上遇到了类似的问题，但是通过更改进行了修复XNA内容项目中的Premultiplied设置.我该如何为MonoGame做类似的事情? (我希望这里的OpenGL有区别)

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)

推荐答案

我们通过使用两种不同的设置解决了该问题.

We solved it by using two different setups.

在Windows和XNA上:

On Windows and XNA:

• 使用BlendState.NonPremultiplied
• 在所有PNG的内容项目上将默认设置更改为Premultiply = False
• 要修改精灵的Alpha值，请使用Color.White并设置A值

• 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.White and set A value

在MonoGame和iOS上:

On MonoGame and iOS:

• 使用BlendState.AlphaBlend
• 按原样保留PNG
• 要修改精灵的Alpha值，请使用Color.White * (float)Alpha / (float)byte.MaxValue

• Use BlendState.AlphaBlend
• Leave PNGs as-is
• To modify Alpha value of a sprite, use Color.White * (float)Alpha / (float)byte.MaxValue

我的PNG没有预先乘以 ，它们的使用方式与您从Photoshop中获得的期望值完全相同.

My PNGs are not pre-multiplied and are used exactly as you'd expect coming out of Photoshop.

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