glGetTexParameter.3gl

Name

  glGetTexParameterfv, glGetTexParameteriv - return texture parameter values

C Specification

  void glGetTexParameterfv( GLenum target,

			    GLenum pname,

			    GLfloat *params )

  void glGetTexParameteriv( GLenum target,

			    GLenum pname,

			    GLint *params )

Parameters

  target  Specifies the	symbolic name of the target texture.  GL_TEXTURE_1D

	  and GL_TEXTURE_2D are	accepted.



  pname	  Specifies the	symbolic name of a texture parameter.

	  GL_TEXTURE_MAG_FILTER, GL_TEXTURE_MIN_FILTER,	GL_TEXTURE_WRAP_S,

	  GL_TEXTURE_WRAP_T, and GL_TEXTURE_BORDER_COLOR are accepted.



  params  Returns the texture parameters.

Description

  glGetTexParameter returns in params the value	or values of the texture

  parameter specified as pname.	 target	defines	the target texture, either

  GL_TEXTURE_1D	or GL_TEXTURE_2D, to specify one- or two-dimensional

  texturing.  pname accepts the	same symbols as	glTexParameter,	with the same

  interpretations:



  GL_TEXTURE_MAG_FILTER		     Returns the single-valued texture

				     magnification filter, a symbolic

				     constant.



  GL_TEXTURE_MIN_FILTER		     Returns the single-valued texture

				     minification filter, a symbolic

				     constant.



  GL_TEXTURE_WRAP_S		     Returns the single-valued wrapping

				     function for texture coordinate s,	a

				     symbolic constant.



  GL_TEXTURE_WRAP_T		     Returns the single-valued wrapping

				     function for texture coordinate t,	a

				     symbolic constant.



  GL_TEXTURE_BORDER_COLOR	     Returns four integer or floating-point

				     numbers that comprise the RGBA color of

				     the texture border.  Floating-point

				     values are	returned in the	range [0,1].

				     Integer values are	returned as a linear

				     mapping of	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.

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 glGetTexParameter is called between a

  call to glBegin and the corresponding	call to	glEnd.

See Also

  glTexParameter

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Last Edited: Mon, May 22, 1995

AFV