glGetTexEnv(3G)		       OpenGL Reference		       glGetTexEnv(3G)



NAME
     glGetTexEnvfv, glGetTexEnviv - return texture environment parameters


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


PARAMETERS
     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, GL_TEXTURE_ENV_COLOR,
	     and GL_TEXTURE_ENV_BIAS_SGIX.

     params  Returns the requested data.


DESCRIPTION
     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.  The	parameters are
     as	follows:

     GL_TEXTURE_ENV_MODE
	       params returns the single-valued	texture	environment mode, a
	       symbolic	constant.

     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.

     GL_TEXTURE_ENV_BIAS_SGIX
	       params returns four integer or floating-point values that are
	       the texture environment bias color.  Integer values are mapped
	       in the same way as those	for GL_TEXTURE_ENV_COLOR.







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glGetTexEnv(3G)		       OpenGL Reference		       glGetTexEnv(3G)



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

ERRORS
     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.


SEE ALSO
     glTexEnv











































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