glgettexfilterfuncsgis(3G)



glGetTexFilterFuncSGIS(3G)     OpenGL Reference     glGetTexFilterFuncSGIS(3G)



NAME
     glGetTexFilterFuncSGIS - return user-defined texture filtering function


C SPECIFICATION
     void glGetTexFilterFuncSGIS( GLenum target,
                                  GLenum filter,
                                  GLfloat *weights )


PARAMETERS
     target   Specifies the target texture whose filtering function weights
              are to be returned.  Must be GLTEXTURE1D or GLTEXTURE2D.

     filter   Specifies the filter function whose weights are to be returned.
              Must be GLFILTER4SGIS.

     weights  Specifies an array to receive the floating-point weight values.

DESCRIPTION
     glGetTexFilterFuncSGIS returns in weights the user-defined filtering
     function specified by glTexFilterFuncSGIS.  weights must have Size
     elements, where Size is determined by calling glGetTexParameter with
     argument GLTEXTUREFILTER4SIZESGIS.

NOTES
     glGetTexFilterFuncSGIS is part of the SGIStexturefilter4 extension, not
     part of the core GL command set.  If GLSGIStexturefilter4 is included
     in the string returned by glGetString when called with argument
     GLEXTENSIONS, extension SGIStexturefilter4 is supported by the
     connection.  See glIntro for more information about using extensions.

ERRORS
     GLINVALIDENUM is generated if either target or filter is not one of the
     allowable values.

     GLINVALIDOPERATION is generated if glGetTexFilterFuncSGIS is executed
     between the execution of glBegin and the corresponding execution of
     glEnd.


MACHINE DEPENDENCIES
     The SGIStexturefilter4 extension is supported only on InfiniteReality
     systems.

     On InfiniteReality systems, GLINVALIDVALUE is generated if the value of
     the argument n to the command glTexFilterFuncSGIS does not equal the
     value of the implementation dependent constant Size, which can be
     determined by calling glGetTexParameter with argument
     GLTEXTUREFILTER4SIZESGIS.  This restriction will be removed in a
     future release.




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glGetTexFilterFuncSGIS(3G)     OpenGL Reference     glGetTexFilterFuncSGIS(3G)



SEE ALSO
     glTexFilterFuncSGIS, glTexParameter.





















































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