GL_ARB_sampler_objects
http://www.opengl.org/registry/specs/gl/ARB/sampler_objects.txt
GL_ARB_sampler_objects
	GL_SAMPLER_BINDING 0x8919
	void glBindSampler (GLuint unit, GLuint sampler)
	void glDeleteSamplers (GLsizei count, const GLuint * samplers)
	void glGenSamplers (GLsizei count, GLuint* samplers)
	void glGetSamplerParameterIiv (GLuint sampler, GLenum pname, GLint* params)
	void glGetSamplerParameterIuiv (GLuint sampler, GLenum pname, GLuint* params)
	void glGetSamplerParameterfv (GLuint sampler, GLenum pname, GLfloat* params)
	void glGetSamplerParameteriv (GLuint sampler, GLenum pname, GLint* params)
	GLboolean glIsSampler (GLuint sampler)
	void glSamplerParameterIiv (GLuint sampler, GLenum pname, const GLint* params)
	void glSamplerParameterIuiv (GLuint sampler, GLenum pname, const GLuint* params)
	void glSamplerParameterf (GLuint sampler, GLenum pname, GLfloat param)
	void glSamplerParameterfv (GLuint sampler, GLenum pname, const GLfloat* params)
	void glSamplerParameteri (GLuint sampler, GLenum pname, GLint param)
	void glSamplerParameteriv (GLuint sampler, GLenum pname, const GLint* params)