GL_SGIX_texture_coordinate_clamp
https://www.khronos.org/registry/OpenGL/extensions/SGIX/SGIX_texture_coordinate_clamp.txt
GL_SGIX_texture_coordinate_clamp

	GL_TEXTURE_MAX_CLAMP_S_SGIX 0x8369
	GL_TEXTURE_MAX_CLAMP_T_SGIX 0x836A
	GL_TEXTURE_MAX_CLAMP_R_SGIX 0x836B