The following OpenGL extensions are supported
    by the HP VisualizeFX graphics hardware:

        GL_EXT_bgr
        GL_EXT_bgra
        GL_EXT_depth_texture
        GL_EXT_generate_mipmap
        GL_EXT_shadow
        GL_EXT_texture_border_clamp
        GL_EXT_texture_edge_clamp
        GL_EXT_texture3D
        GL_EXT_subtexture
        GL_EXT_rescale_normal
        GL_WIN_overlay
        GL_WIN_swap_hint
        GL_KTX_buffer_region
        GL_EXT_polygon_offset
        GL_Autodesk_valid_back_buffer_hint

    The following HP specific extensions are also
    supported:

        GL_HP_occlusion
            This extension provides a mechanism
            for applications to test whether a
            complicated primitive would be visible
            or not, without having to draw the
            whole primitive.

        GL_HP_visibility_test
            The Visibility Test extension improves upon HP's
            occlusion test extension by letting applications
            perform multiple visibility tests before getting
            back the results. This is different than the occlusion
            test extension which provides only a single visibility
            test result. To perform multiple visibility tests with
            the occlusion test extension, the result of the previous
            test must be obtained before starting a new test. With the 
            Visibility Test extension, performance is improved
            because the results of many tests can be obtained in
            a single call.

        GL_HP_visibility_stats
            Visibility Statistics is a logical extension
            to HP's occlusion test and visibility test
            extensions. While visibility testing gives a
            binary answer of visible or NOT visible,
            visibility statistics gives a quantative answer
            of how visible in the form of a pass count and
            a fail count. Applications can use these counts
            to compute "percent visible" numbers and use
            the results in Level Of Detail (LOD) algorithms.

        GL_HP_texture_lighting
            This extension provides a way for
            specular highlights not to blend with
            texture colors.  This creates a more
            realistic effect for certain surfaces.

        GL_HP_draw_array_set
            This extension provides the HP-only function
            glDrawArraySetHP(). It allows one to pass a
            set of glDrawArrays() calls in one call.
            Applications can use glDrawArraySetHP() to
            specify multiple primitives of the same type
            with a single function call.

        GL_HP_supersample
            This extension allows the user to
            turn on super sampling in order
            to accomplish full-scene anti-aliasing

        GL_HP_texture_color_table
            This extension adds a color lookup table to the
            texture mechanism. The table can be applied either
            prior to the filtering the texture lookup, or to the
            filtered result of the texture lookup. The result
            of this operation is used in the texture environment
            equations.


The include file for these extensions, as well as
other demos and utilities, can be obtained by
running the setup program provided on the CD.