fglgettexenv man page on IRIX

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fglGetTexEnv(3G)	       OpenGL Reference		      fglGetTexEnv(3G)

NAME
     fglGetTexEnvfv, fglGetTexEnviv - return texture environment parameters

FORTRAN SPECIFICATION
     SUBROUTINE fglGetTexEnvfv( INTEGER*4 target,
				INTEGER*4 pname,
				CHARACTER*8 params )
     SUBROUTINE fglGetTexEnviv( INTEGER*4 target,
				INTEGER*4 pname,
				CHARACTER*8 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
     fglGetTexEnv returns in params selected values of a texture environment
     that was specified with fglTexEnv.	 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).

     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.

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

									Page 1

fglGetTexEnv(3G)	       OpenGL Reference		      fglGetTexEnv(3G)

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

     GL_INVALID_OPERATION is generated if fglGetTexEnv is executed between the
     execution of fglBegin and the corresponding execution of fglEnd.

SEE ALSO
     fglTexEnv

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