NAME    [Toc]    [Back]

       glGetTexEnv, glGetTexEnvfv, glGetTexEnviv - return texture
       environment parameters

SYNOPSIS    [Toc]    [Back]

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

PARAMETERS    [Toc]    [Back]

       Specifies a texture environment. Must  be  GL_TEXTURE_ENV.
       Specifies  the  symbolic  name  of  a  texture environment
       parameter. Accepted  values  are  GL_TEXTURE_ENV_MODE  and
       GL_TEXTURE_ENV_COLOR.  Returns the requested data.

DESCRIPTION    [Toc]    [Back]

       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, as
       follows: params returns the single-valued texture environment
  mode,  a  symbolic  constant.  The  initial value is
       GL_MODULATE.  params returns  four  integer  or  floatingpoint
 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).

NOTES    [Toc]    [Back]

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

       When   the  GL_ARB_multitexture  extension  is  supported,
       glGetTexEnv() returns the texture  environment  parameters
       for the active texture unit.

ERRORS    [Toc]    [Back]

       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    [Toc]    [Back]

       glActiveTextureARB(3), glTexEnv(3)



                                                  glGetTexEnv(3G)