Anisotropic filter on the drawing buffer

OpenGL OpenGL: Basic Coding
1

Hi All,
I have a question, I have an application drawing 3d points and I want to apply an anisotropic filter to the resulting image .
Which is the best way to do this ? Can I apply filters only to textures?

Thank you.

2

I want to apply an anisotropic filter to the resulting image

Anisotropic filtering, as the name implies, is a texture filtering technique. It cannot be applied to the “resulting image” unless you are using that image as a texture.

What you’re probably looking for is antialiasing.