This Fetch4 feature is present in DX9 on ATI. There is a paper about it in ATI SDK March 2006. They even planned GL_ATI_texture_nearest_four in OpenGL but as we know it has never been shipped.
This Fetch4 feature is present in DX9 on ATI. There is a paper about it in ATI SDK March 2006. They even planned GL_ATI_texture_nearest_four in OpenGL but as we know it has never been shipped.