// Filename: texMatrixAttrib.I
// Created by:  drose (14Mar02)
//
////////////////////////////////////////////////////////////////////
//
// PANDA 3D SOFTWARE
// Copyright (c) 2001 - 2004, Disney Enterprises, Inc.  All rights reserved
//
// All use of this software is subject to the terms of the Panda 3d
// Software license.  You should have received a copy of this license
// along with this source code; you will also find a current copy of
// the license at http://etc.cmu.edu/panda3d/docs/license/ .
//
// To contact the maintainers of this program write to
// panda3d-general@lists.sourceforge.net .
//
////////////////////////////////////////////////////////////////////


////////////////////////////////////////////////////////////////////
//     Function: TexMatrixAttrib::Constructor
//       Access: Protected
//  Description: Use TexMatrixAttrib::make() to construct a new
//               TexMatrixAttrib object.
////////////////////////////////////////////////////////////////////
INLINE TexMatrixAttrib::
TexMatrixAttrib() : _stage_list_stale(true) {
}

////////////////////////////////////////////////////////////////////
//     Function: TexMatrixAttrib::Copy Constructor
//       Access: Protected
//  Description: Use TexMatrixAttrib::make() to construct a new
//               TexMatrixAttrib object.
////////////////////////////////////////////////////////////////////
INLINE TexMatrixAttrib::
TexMatrixAttrib(const TexMatrixAttrib &copy) :
  _stages(copy._stages),
  _stage_list_stale(true)
{
}

////////////////////////////////////////////////////////////////////
//     Function: TexMatrixAttrib::get_geom_rendering
//       Access: Published
//  Description: Returns the union of the Geom::GeomRendering bits
//               that will be required once this TexMatrixAttrib is
//               applied to a geom which includes the indicated
//               geom_rendering bits.
////////////////////////////////////////////////////////////////////
INLINE int TexMatrixAttrib::
get_geom_rendering(int geom_rendering) const {
  if ((geom_rendering & Geom::GR_point_sprite) != 0) {
    if (!is_empty()) {
      geom_rendering |= Geom::GR_point_sprite_tex_matrix;
    }
  }

  return geom_rendering;
}

////////////////////////////////////////////////////////////////////
//     Function: TexMatrixAttrib::check_stage_list
//       Access: Private
//  Description: Builds the linear list of TextureStages if it needs
//               to be built.
////////////////////////////////////////////////////////////////////
INLINE void TexMatrixAttrib::
check_stage_list() const {
  if (_stage_list_stale) {
    ((TexMatrixAttrib *)this)->rebuild_stage_list();
  }
}