#ifndef COIN_SOMULTITEXTURECOORDINATEELEMENT_H
#define COIN_SOMULTITEXTURECOORDINATEELEMENT_H

/**************************************************************************\
 * Copyright (c) Kongsberg Oil & Gas Technologies AS
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 * 
 * Redistributions of source code must retain the above copyright notice,
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 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 * 
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\**************************************************************************/

#include <Inventor/elements/SoElement.h>
#include <Inventor/elements/SoSubElement.h>
#include <Inventor/SbVec2f.h>
#include <Inventor/SbVec3f.h>
#include <Inventor/SbVec4f.h>

typedef const SbVec4f & SoTextureCoordinateFunctionCB(void * userdata,
                                                      const SbVec3f & point,
                                                      const SbVec3f & normal);

class SoMultiTextureCoordinateElementP;

class COIN_DLL_API SoMultiTextureCoordinateElement : public SoElement {
  typedef SoElement inherited;

  SO_ELEMENT_HEADER(SoMultiTextureCoordinateElement);
public:
  static void initClass(void);
protected:
  virtual ~SoMultiTextureCoordinateElement();

public:

  enum CoordType {
    NONE = 0,
    TEXGEN = 0,
    EXPLICIT = 1,
    FUNCTION = 2,
    DEFAULT = 3
  };

  virtual void init(SoState * state);

  static void setDefault(SoState * const state, SoNode * const node, const int unit = 0);
  static void setFunction(SoState * const state, SoNode * const node,
                          const int unit,
                          SoTextureCoordinateFunctionCB * const func,
                          void * const userdata);

  static void set2(SoState * const state, SoNode * const node,
                   const int unit,
                   const int32_t numCoords, const SbVec2f * const coords);
  static void set3(SoState * const state, SoNode * const node,
                   const int unit,
                   const int32_t numCoords, const SbVec3f * const coords);
  static void set4(SoState * const state, SoNode * const node,
                   const int unit,
                   const int32_t numCoords, const SbVec4f * const coords);

  static CoordType getType(SoState * const state, const int unit = 0);
  virtual CoordType getType(const int unit = 0) const;
  
  static const SoMultiTextureCoordinateElement * getInstance(SoState * const state);

  const SbVec4f & get(const int unit,
                      const SbVec3f & point,
                      const SbVec3f & normal) const;

  int32_t getNum(const int unit = 0) const;
  SbBool is2D(const int unit = 0) const;
  int32_t getDimension(const int unit = 0) const;

  const SbVec2f & get2(const int unit, const int index) const;
  const SbVec3f & get3(const int unit, const int index) const;
  const SbVec4f & get4(const int unit, const int index) const;

  const SbVec2f * getArrayPtr2(const int unit = 0) const;
  const SbVec3f * getArrayPtr3(const int unit = 0)  const;
  const SbVec4f * getArrayPtr4(const int unit = 0) const;

  class UnitData {
  public:
    UnitData();
    UnitData(const UnitData & org);

    uint32_t nodeid;
    CoordType whatKind;
    SoTextureCoordinateFunctionCB * funcCB;
    void * funcCBData;
    int32_t numCoords;
    const SbVec2f * coords2;
    const SbVec3f * coords3;
    const SbVec4f * coords4;
    int coordsDimension;
  };

  virtual void push(SoState * state);
  virtual SbBool matches(const SoElement * elem) const;
  SoElement * copyMatchInfo(void) const;

  // Coin-3 support
  const SbVec4f & get(const SbVec3f & point,
                      const SbVec3f & normal) const {
    return this->get(0, point, normal);
  }
  
  static void setFunction(SoState * const state, 
                          SoNode * const node,
                          SoTextureCoordinateFunctionCB * const func,
                          void * const userdata) {
    setFunction(state, node, 0, func, userdata);
  }

  static void set2(SoState * const state, SoNode * const node,
                   const int32_t numCoords, const SbVec2f * const coords) {
    set2(state, node, 0, numCoords, coords);
  }
  static void set3(SoState * const state, SoNode * const node,
                   const int32_t numCoords, const SbVec3f * const coords) {
    set3(state, node, 0, numCoords, coords);
  }
  static void set4(SoState * const state, SoNode * const node,
                   const int32_t numCoords, const SbVec4f * const coords) {
    set4(state, node, 0, numCoords, coords);
  }
  const SbVec2f & get2(const int index) const {
    return this->get2(0, index);
  }
  const SbVec3f & get3(const int index) const {
    return this->get3(0, index);
  }
  const SbVec4f & get4(const int index) const {
    return this->get4(0, index);
  }


protected:
  int getMaxUnits() const;
  UnitData & getUnitData(const int unit);
  const UnitData & getUnitData(const int unit) const;
  SbVec2f convert2;
  SbVec3f convert3;
  SbVec4f convert4;

private:
  SoMultiTextureCoordinateElementP * pimpl;
};

#endif // !COIN_SOMULTITEXTURECOORDINATEELEMENT_H
