GL_NV_register_combiners
https://www.khronos.org/registry/OpenGL/extensions/NV/NV_register_combiners.txt
GL_NV_register_combiners

	GL_REGISTER_COMBINERS_NV 0x8522
	GL_VARIABLE_A_NV 0x8523
	GL_VARIABLE_B_NV 0x8524
	GL_VARIABLE_C_NV 0x8525
	GL_VARIABLE_D_NV 0x8526
	GL_VARIABLE_E_NV 0x8527
	GL_VARIABLE_F_NV 0x8528
	GL_VARIABLE_G_NV 0x8529
	GL_CONSTANT_COLOR0_NV 0x852A
	GL_CONSTANT_COLOR1_NV 0x852B
	GL_PRIMARY_COLOR_NV 0x852C
	GL_SECONDARY_COLOR_NV 0x852D
	GL_SPARE0_NV 0x852E
	GL_SPARE1_NV 0x852F
	GL_DISCARD_NV 0x8530
	GL_E_TIMES_F_NV 0x8531
	GL_SPARE0_PLUS_SECONDARY_COLOR_NV 0x8532
	GL_UNSIGNED_IDENTITY_NV 0x8536
	GL_UNSIGNED_INVERT_NV 0x8537
	GL_EXPAND_NORMAL_NV 0x8538
	GL_EXPAND_NEGATE_NV 0x8539
	GL_HALF_BIAS_NORMAL_NV 0x853A
	GL_HALF_BIAS_NEGATE_NV 0x853B
	GL_SIGNED_IDENTITY_NV 0x853C
	GL_SIGNED_NEGATE_NV 0x853D
	GL_SCALE_BY_TWO_NV 0x853E
	GL_SCALE_BY_FOUR_NV 0x853F
	GL_SCALE_BY_ONE_HALF_NV 0x8540
	GL_BIAS_BY_NEGATIVE_ONE_HALF_NV 0x8541
	GL_COMBINER_INPUT_NV 0x8542
	GL_COMBINER_MAPPING_NV 0x8543
	GL_COMBINER_COMPONENT_USAGE_NV 0x8544
	GL_COMBINER_AB_DOT_PRODUCT_NV 0x8545
	GL_COMBINER_CD_DOT_PRODUCT_NV 0x8546
	GL_COMBINER_MUX_SUM_NV 0x8547
	GL_COMBINER_SCALE_NV 0x8548
	GL_COMBINER_BIAS_NV 0x8549
	GL_COMBINER_AB_OUTPUT_NV 0x854A
	GL_COMBINER_CD_OUTPUT_NV 0x854B
	GL_COMBINER_SUM_OUTPUT_NV 0x854C
	GL_MAX_GENERAL_COMBINERS_NV 0x854D
	GL_NUM_GENERAL_COMBINERS_NV 0x854E
	GL_COLOR_SUM_CLAMP_NV 0x854F
	GL_COMBINER0_NV 0x8550
	GL_COMBINER1_NV 0x8551
	GL_COMBINER2_NV 0x8552
	GL_COMBINER3_NV 0x8553
	GL_COMBINER4_NV 0x8554
	GL_COMBINER5_NV 0x8555
	GL_COMBINER6_NV 0x8556
	GL_COMBINER7_NV 0x8557
	void glCombinerInputNV (GLenum stage, GLenum portion, GLenum variable, GLenum input, GLenum mapping, GLenum componentUsage)
	void glCombinerOutputNV (GLenum stage, GLenum portion, GLenum abOutput, GLenum cdOutput, GLenum sumOutput, GLenum scale, GLenum bias, GLboolean abDotProduct, GLboolean cdDotProduct, GLboolean muxSum)
	void glCombinerParameterfNV (GLenum pname, GLfloat param)
	void glCombinerParameterfvNV (GLenum pname, const GLfloat* params)
	void glCombinerParameteriNV (GLenum pname, GLint param)
	void glCombinerParameterivNV (GLenum pname, const GLint* params)
	void glFinalCombinerInputNV (GLenum variable, GLenum input, GLenum mapping, GLenum componentUsage)
	void glGetCombinerInputParameterfvNV (GLenum stage, GLenum portion, GLenum variable, GLenum pname, GLfloat* params)
	void glGetCombinerInputParameterivNV (GLenum stage, GLenum portion, GLenum variable, GLenum pname, GLint* params)
	void glGetCombinerOutputParameterfvNV (GLenum stage, GLenum portion, GLenum pname, GLfloat* params)
	void glGetCombinerOutputParameterivNV (GLenum stage, GLenum portion, GLenum pname, GLint* params)
	void glGetFinalCombinerInputParameterfvNV (GLenum variable, GLenum pname, GLfloat* params)
	void glGetFinalCombinerInputParameterivNV (GLenum variable, GLenum pname, GLint* params)
