GL_INTEL_texture_scissor
https://www.khronos.org/registry/OpenGL/extensions/INTEL/INTEL_texture_scissor.txt
GL_INTEL_texture_scissor

	void glTexScissorFuncINTEL (GLenum target, GLenum lfunc, GLenum hfunc)
	void glTexScissorINTEL (GLenum target, GLclampf tlow, GLclampf thigh)