GL_EXT_geometry_shader4
http://developer.download.nvidia.com/opengl/specs/GL_EXT_geometry_shader4.txt
	GL_GEOMETRY_SHADER_EXT 0x8DD9
	GL_MAX_GEOMETRY_VARYING_COMPONENTS_EXT 0x8DDD
	GL_MAX_VERTEX_VARYING_COMPONENTS_EXT 0x8DDE
	GL_MAX_VARYING_COMPONENTS_EXT 0x8B4B
	GL_MAX_GEOMETRY_UNIFORM_COMPONENTS_EXT 0x8DDF
	GL_MAX_GEOMETRY_OUTPUT_VERTICES_EXT 0x8DE0
	GL_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS_EXT 0x8DE1
	GL_GEOMETRY_VERTICES_OUT_EXT 0x8DDA
	GL_GEOMETRY_INPUT_TYPE_EXT 0x8DDB
	GL_GEOMETRY_OUTPUT_TYPE_EXT 0x8DDC
	GL_MAX_GEOMETRY_TEXTURE_IMAGE_UNITS_EXT 0x8C29
	GL_LINES_ADJACENCY_EXT 0xA
	GL_LINE_STRIP_ADJACENCY_EXT 0xB
	GL_TRIANGLES_ADJACENCY_EXT 0xC
	GL_TRIANGLE_STRIP_ADJACENCY_EXT 0xD
	GL_FRAMEBUFFER_ATTACHMENT_LAYERED_EXT 0x8DA7
	GL_FRAMEBUFFER_INCOMPLETE_LAYER_TARGETS_EXT 0x8DA8
	GL_FRAMEBUFFER_INCOMPLETE_LAYER_COUNT_EXT 0x8DA9
	GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LAYER_EXT 0x8CD4
	GL_PROGRAM_POINT_SIZE_EXT 0x8642
	void glProgramParameteriEXT (GLuint program, GLenum pname, GLint value)
	void glFramebufferTextureEXT (GLenum target, GLenum attachment, GLuint texture, GLint level)
	void glFramebufferTextureLayerEXT (GLenum target, GLenum attachment, GLuint texture, GLint level, GLint layer)
	void glFramebufferTextureFaceEXT (GLenum target, GLenum attachment, GLuint texture, GLint level, GLenum face)