glGetTexParameter man page on DigitalUNIX

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glGetTexParameter(3G)					 glGetTexParameter(3G)

NAME
       glGetTexParameter,  glGetTexParameterfv,	 glGetTexParameteriv  - return
       texture parameter values

SYNOPSIS
       void glGetTexParameterfv(
	       GLenum target,
	       GLenum pname,
	       GLfloat *params ); void glGetTexParameteriv(
	       GLenum target,
	       GLenum pname,
	       GLint *params );

PARAMETERS
       Specifies  the  symbolic	 name  of   the	  target   texture.    GL_TEX‐
       TURE_1D,GL_TEXTURE_2D,  and  GL_TEXTURE_3D are accepted.	 Specifies the
       symbolic name of a texture parameter.   GL_TEXTURE_MAG_FILTER,  GL_TEX‐
       TURE_MIN_FILTER,	   GL_TEXTURE_MIN_LOD,	 GL_TEXTURE_MAX_LOD,   GL_TEX‐
       TURE_BASE_LEVEL,	  GL_TEXTURE_MAX_LEVEL,	  GL_TEXTURE_WRAP_S,   GL_TEX‐
       TURE_WRAP_T,    GL_TEXTURE_WRAP_R,   GL_TEXTURE_BORDER_COLOR,   GL_TEX‐
       TURE_PRIORITY, and GL_TEXTURE_RESIDENT are accepted.  Returns the  tex‐
       ture parameters.

DESCRIPTION
       glGetTexParameter()  returns  in params the value or values of the tex‐
       ture parameter specified as pname.  target defines the target  texture,
       either  GL_TEXTURE_1D, GL_TEXTURE_2D, or GL_TEXTURE_3D to specify one-,
       two-, or three-dimensional texturing.  pname accepts the	 same  symbols
       as glTexParameter(), with the same interpretations: Returns the single-
       valued texture magnification filter, a symbolic constant.  The  initial
       value  is  GL_LINEAR.   Returns	the single-valued texture minification
       filter,	a  symbolic  constant.	 The   initial	 value	 is   GL_NEAR‐
       EST_MIPMAP_LINEAR.  Returns the single-valued texture minimum level-of-
       detail value.  The initial value is -1000.  Returns  the	 single-valued
       texture	maximum	 level-of-detail  value.  The  initial	value is 1000.
       Returns the single-valued base texture mipmap level.  The initial value
       is  0.	Returns	 the single-valued maximum texture mipmap array level.
       The initial value is 1000.  Returns the single-valued wrapping function
       for  texture  coordinate	 s,  a symbolic constant. The initial value is
       GL_REPEAT.  Returns the single-valued  wrapping	function  for  texture
       coordinate  t,  a  symbolic  constant.  The initial value is GL_REPEAT.
       Returns the single-valued wrapping function for texture coordinate r, a
       symbolic	 constant. The initial value is GL_REPEAT.  Returns four inte‐
       ger or floating-point numbers that comprise the RGBA color of the  tex‐
       ture  border.  Floating-point  values are returned in the range [0, 1].
       Integer values are returned as a linear mapping of the internal	float‐
       ing-point representation such that 1.0 maps to the most positive repre‐
       sentable integer and -1.0 maps to the most negative representable inte‐
       ger. The initial value is (0, 0, 0, 0).	Returns the residence priority
       of the target texture (or the named texture bound to it).  The  initial
       value  is  1. See glPrioritizeTextures().  Returns the residence status
       of the target texture. If the value returned in params is GL_TRUE,  the
       texture is resident in texture memory. See glAreTexturesResident().

NOTES
       GL_TEXTURE_PRIORITY  and	 GL_TEXTURE_RESIDENT are available only if the
       GL version is 1.1 or greater.

       GL_TEXTURE_3D,	 GL_TEXTURE_MIN_LOD,	GL_TEXTURE_MAX_LOD,    GL_TEX‐
       TURE_BASE_LEVEL, GL_TEXTURE_MAX_LEVEL, and GL_TEXTURE_WRAP_R are avail‐
       able only if the GL version is 1.2 or greater.

       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 executed
       between the execution of glBegin() and the corresponding	 execution  of
       glEnd().

SEE ALSO
       glAreTexturesResident(3), glPrioritizeTextures(3), glTexParameter(3)

							 glGetTexParameter(3G)
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