GL_EXT_texture_filter_anisotropic
https://www.khronos.org/registry/OpenGL/extensions/EXT/EXT_texture_filter_anisotropic.txt
GL_EXT_texture_filter_anisotropic

	GL_TEXTURE_MAX_ANISOTROPY_EXT 0x84FE
	GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT 0x84FF
