void GLAPIENTRY glGetTexLevelParameterfv( GLenum target,
                                                 GLint leve )
       void GLAPIENTRY glGetTexLevelParameteriv( GLenum target,
                                                 GLint leve )

PARAMETERS
       target  Specifies the  symbolic  name  of  the  target  texture,  either
               GL_TEXTURE_1D,           GL_TEXTURE_2D,           GL_TEXTURE_3D,
               GL_PROXY_TEXTURE_1D,           GL_PROXY_TEXTURE_2D,           or
               GL_PROXY_TEXTURE_3D.

       leve    Specifies  the  level-of-detail  number  of  the  desired image.
               Level 0 is the base image level.  Level n is the nth mipmap  re‐
               duction image.

       _param3 Specifies   the   symbolic   name   of   a   texture  parameter.
               GL_TEXTURE_WIDTH,      GL_TEXTURE_HEIGHT,      GL_TEXTURE_DEPTH,
               GL_TEXTURE_INTERNAL_FORMAT,                   GL_TEXTURE_BORDER,
               GL_TEXTURE_RED_SIZE,                      GL_TEXTURE_GREEN_SIZE,
               GL_TEXTURE_BLUE_SIZE,                     GL_TEXTURE_ALPHA_SIZE,
               GL_TEXTURE_LUMINANCE_SIZE, and GL_TEXTURE_INTENSITY_SIZE are ac‐
               cepted.

       _param4 Returns the requested data.

DESCRIPTION
       glGetTexLevelParameter returns in _param4 texture parameter values for a
       specific level-of-detail value, specified as leve.  target  defines  the
       target  texture,  either  GL_TEXTURE_1D,  GL_TEXTURE_2D,  GL_TEXTURE_3D,
       GL_PROXY_TEXTURE_1D, GL_PROXY_TEXTURE_2D, or GL_PROXY_TEXTURE_3D.

       GL_MAX_TEXTURE_SIZE, and GL_MAX_3D_TEXTURE_SIZE are not really  descrip‐
       tive enough.  It has to report the largest square texture image that can
       be accommodated with mipmaps and borders, but a long skinny texture,  or
       a texture without mipmaps and borders, may easily fit in texture memory.
       The proxy targets allow the user to more accurately query whether the GL
       can accommodate a texture of a given configuration.  If the texture can‐
       not be accommodated, the texture state variables, which may  be  queried
       with glGetTexLevelParameter, are set to 0.  If the texture can be accom‐
       modated, the texture state values will be set as they would be set for a
       non-proxy target.

       _param3  specifies  the  texture parameter whose value or values will be
       returned.

       The accepted parameter names are as follows:

       GL_TEXTURE_WIDTH
                 _param4 returns a single value, the width of the  texture  im‐
                 age.  This value includes the border of the texture image. The
                 initial value is 0.

       GL_TEXTURE_BORDER
                 _param4  returns  a  single  value, the width in pixels of the
                 border of the texture image. The initial value is 0.

       GL_TEXTURE_RED_SIZE,

       GL_TEXTURE_GREEN_SIZE,

       GL_TEXTURE_BLUE_SIZE,

       GL_TEXTURE_ALPHA_SIZE,

       GL_TEXTURE_LUMINANCE_SIZE,

       GL_TEXTURE_INTENSITY_SIZE
                 The internal storage resolution of  an  individual  component.
                 The  resolution chosen by the GL will be a close match for the
                 resolution requested by the user with the  component  argument
                 of glTexImage1D, glTexImage2D, glTexImage3D, glCopyTexImage1D,
                 and glCopyTexImage2D. The initial value is 0.

NOTES
       If an error is generated, no change is made to the contents of _param4.

       GL_TEXTURE_INTERNAL_FORMAT is available only if the GL version is 1.1 or
       greater. In version 1.0, use GL_TEXTURE_COMPONENTS instead.

       GL_PROXY_TEXTURE_1D and GL_PROXY_TEXTURE_2D are available only if the GL
       version is 1.1 or greater.

       GL_TEXTURE_3D, GL_PROXY_TEXTURE_3D, and GL_TEXTURE_DEPTH  are  available
       only if the GL version is 1.2 or greater.

       When     the     GL_ARB_multitexture     extension     is     supported,
       glGetTexLevelParameter returns the texture level parameters for the  ac‐
       tive texture unit.

ERRORS
       GL_INVALID_ENUM  is  generated  if  target or _param3 is not an accepted
       value.

       GL_INVALID_VALUE is generated if leve is less than 0.

       GL_INVALID_VALUE may be generated if leve  is  greater  than  log2  max,
       where max is the returned value of GL_MAX_TEXTURE_SIZE.

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

SEE ALSO
       glActiveTextureARB,         glGetTexParameter,         glCopyTexImage1D,