New Situation of xNa texture Loading

After loading the xNa texture, we found that the alpha channel was very strange.

Even if I use the shader, I feel that the color value has been multiplied by Alpha, while the natural texture2d. loadfromstream only supports PNG GIF. jpg.

The PNG channel information is incomplete, and the other two do not.

However, the text cache I created seems to show normal and easy-to-understand alpha behavior.

Does the loading of texture also need to be processed?

Does the xNa development team think that we only use Alpha information for transparency? Or there are some settings that I need to study carefully.

It turns out that there is a premultiplication Alpha and colorkey .........

The colorkey here also has the color value and Alpha, so it should be disabled here for normal behavior.