WGL_NV_float_buffer
http://oss.sgi.com/projects/ogl-sample/registry/NV/float_buffer.txt
	WGL_FLOAT_COMPONENTS_NV 0x20B0
	WGL_BIND_TO_TEXTURE_RECTANGLE_FLOAT_R_NV 0x20B1
	WGL_BIND_TO_TEXTURE_RECTANGLE_FLOAT_RG_NV 0x20B2
	WGL_BIND_TO_TEXTURE_RECTANGLE_FLOAT_RGB_NV 0x20B3
	WGL_BIND_TO_TEXTURE_RECTANGLE_FLOAT_RGBA_NV 0x20B4
	WGL_TEXTURE_FLOAT_R_NV 0x20B5
	WGL_TEXTURE_FLOAT_RG_NV 0x20B6
	WGL_TEXTURE_FLOAT_RGB_NV 0x20B7
	WGL_TEXTURE_FLOAT_RGBA_NV 0x20B8