glGetTexEnvfv, glGetTexEnviv - return	texture	environment
parameters

glGetTexEnvfv
	glGetTexEnvfv(target, pname) -> params
glGetTexEnviv
	glGetTexEnviv(target, pname) -> params

void glGetTexEnvfv( GLenum target,
                    GLenum pname,
                    GLfloat *params )
void glGetTexEnviv( GLenum target,
                    GLenum pname,
                    GLint *params )

target  Specifies a texture environment.  Must be
        GL_TEXTURE_ENV.

pname	  Specifies the	symbolic name of a texture environment
        parameter.  Accepted values are GL_TEXTURE_ENV_MODE
        and GL_TEXTURE_ENV_COLOR.

params  Returns the requested	data.

glGetTexEnv returns in params	selected values	of a texture
environment that was specified with glTexEnv.	 target
specifies a texture environment.  Currently, only one
texture environment is defined and supported:
GL_TEXTURE_ENV.

pname	names a	specific texture environment parameter,	as
follows:

GL_TEXTURE_ENV_MODE
          params returns the single-valued texture
          environment	mode, a	symbolic constant. The initial
          value is GL_MODULATE.

GL_TEXTURE_ENV_COLOR
          params returns four	integer	or floating-point
          values that	are the	texture	environment color.
          Integer values, when requested, are	linearly
          mapped from	the internal floating-point
          representation such	that 1.0 maps to the most
          positive representable integer, and	-1.0 maps to
          the	most negative representable integer. The
          initial value is (0, 0, 0, 0).

If an	error is generated, no change is made to the contents
of params.

GL_INVALID_ENUM is generated if target or pname is not an
accepted value.

GL_INVALID_OPERATION is generated if glGetTexEnv is executed
between the execution	of glBegin and the corresponding
execution of glEnd.

glTexEnv