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 // Copyright (c) 2013-2014 OPEN CASCADE SAS
 //
 // This file is part of Open CASCADE Technology software library.
 //
 // This library is free software; you can redistribute it and/or modify it under
 // the terms of the GNU Lesser General Public License version 2.1 as published
 // by the Free Software Foundation, with special exception defined in the file
 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
 // distribution for complete text of the license and disclaimer of any warranty.
 //
 // Alternatively, this file may be used under the terms of Open CASCADE
 // commercial license or contractual agreement.
 
 #ifndef _Graphic3d_TextureParams_HeaderFile
 #define _Graphic3d_TextureParams_HeaderFile
 
 #include <Graphic3d_LevelOfTextureAnisotropy.hxx>
 #include <Graphic3d_Vec2.hxx>
 #include <Graphic3d_Vec4.hxx>
 #include <Graphic3d_TextureUnit.hxx>
 #include <Graphic3d_TypeOfTextureFilter.hxx>
 #include <Graphic3d_TypeOfTextureMode.hxx>
 #include <Standard.hxx>
 #include <Standard_ShortReal.hxx>
 #include <Standard_Type.hxx>
 #include <Standard_Transient.hxx>
 
 //! This class describes texture parameters.
 class Graphic3d_TextureParams : public Standard_Transient
 {
   DEFINE_STANDARD_RTTIEXT(Graphic3d_TextureParams, Standard_Transient)
 public:
 
   //! Default constructor.
   Standard_EXPORT Graphic3d_TextureParams();
 
   //! Destructor.
   Standard_EXPORT virtual ~Graphic3d_TextureParams();
 
   //! Default texture unit to be used, default is Graphic3d_TextureUnit_BaseColor.
   Graphic3d_TextureUnit TextureUnit() const { return myTextureUnit; }
 
   //! Setup default texture unit.
   void SetTextureUnit (Graphic3d_TextureUnit theUnit) { myTextureUnit = theUnit; }
 
   //! @return TRUE if the texture is modulate.
   //! Default value is FALSE.
   Standard_Boolean IsModulate() const { return myToModulate; }
   
   //! @param theToModulate turn modulation on/off.
   Standard_EXPORT void SetModulate (const Standard_Boolean theToModulate);
   
   //! @return TRUE if the texture repeat is enabled.
   //! Default value is FALSE.
   Standard_Boolean IsRepeat() const { return myToRepeat; }
   
   //! @param theToRepeat turn texture repeat mode ON or OFF (clamping).
   Standard_EXPORT void SetRepeat (const Standard_Boolean theToRepeat);
   
   //! @return texture interpolation filter.
   //! Default value is Graphic3d_TOTF_NEAREST.
   Graphic3d_TypeOfTextureFilter Filter() const { return myFilter; }
   
   //! @param theFilter texture interpolation filter.
   Standard_EXPORT void SetFilter (const Graphic3d_TypeOfTextureFilter theFilter);
   
   //! @return level of anisontropy texture filter.
   //! Default value is Graphic3d_LOTA_OFF.
   Graphic3d_LevelOfTextureAnisotropy AnisoFilter() const { return myAnisoLevel; }
   
   //! @param theLevel level of anisontropy texture filter.
   Standard_EXPORT void SetAnisoFilter (const Graphic3d_LevelOfTextureAnisotropy theLevel);
   
   //! Return rotation angle in degrees; 0 by default.
   //! Complete transformation matrix: Rotation -> Translation -> Scale.
   Standard_ShortReal Rotation() const { return myRotAngle; }
   
   //! @param theAngleDegrees rotation angle.
   Standard_EXPORT void SetRotation (const Standard_ShortReal theAngleDegrees);
   
   //! Return scale factor; (1.0; 1.0) by default, which means no scaling.
   //! Complete transformation matrix: Rotation -> Translation -> Scale.
   const Graphic3d_Vec2& Scale() const { return myScale; }
   
   //! @param theScale scale factor.
   Standard_EXPORT void SetScale (const Graphic3d_Vec2 theScale);
 
   //! Return translation vector; (0.0; 0.0), which means no translation.
   //! Complete transformation matrix: Rotation -> Translation -> Scale.
   const Graphic3d_Vec2& Translation() const { return myTranslation; }
   
   //! @param theVec translation vector.
   Standard_EXPORT void SetTranslation (const Graphic3d_Vec2 theVec);
   
   //! @return texture coordinates generation mode.
   //! Default value is Graphic3d_TOTM_MANUAL.
   Graphic3d_TypeOfTextureMode GenMode() const { return myGenMode; }
   
   //! @return texture coordinates generation plane S.
   const Graphic3d_Vec4& GenPlaneS() const { return myGenPlaneS; }
   
   //! @return texture coordinates generation plane T.
   const Graphic3d_Vec4& GenPlaneT() const { return myGenPlaneT; }
   
   //! Setup texture coordinates generation mode.
   Standard_EXPORT void SetGenMode (const Graphic3d_TypeOfTextureMode theMode, const Graphic3d_Vec4 thePlaneS, const Graphic3d_Vec4 thePlaneT);
 
   //! @return base texture mipmap level; 0 by default.
   Standard_Integer BaseLevel() const { return myBaseLevel; }
 
   //! Return maximum texture mipmap array level; 1000 by default.
   //! Real rendering limit will take into account mipmap generation flags and presence of mipmaps in loaded image.
   Standard_Integer MaxLevel() const { return myMaxLevel; }
 
   //! Setups texture mipmap array levels range.
   //! The lowest value will be the base level.
   //! The remaining one will be the maximum level.
   void SetLevelsRange (Standard_Integer theFirstLevel, Standard_Integer theSecondLevel = 0)
   {
     myMaxLevel  = theFirstLevel > theSecondLevel ? theFirstLevel : theSecondLevel;
     myBaseLevel = theFirstLevel > theSecondLevel ? theSecondLevel : theFirstLevel;
   }
 
   //! Return modification counter of parameters related to sampler state.
   unsigned int SamplerRevision() const { return mySamplerRevision; }
 
 private:
 
   //! Increment revision.
   void updateSamplerRevision() { ++mySamplerRevision; }
 
 private:
 
   Graphic3d_Vec4                     myGenPlaneS;       //!< texture coordinates generation plane S
   Graphic3d_Vec4                     myGenPlaneT;       //!< texture coordinates generation plane T
   Graphic3d_Vec2                     myScale;           //!< texture coordinates scale factor vector; (1,1) by default
   Graphic3d_Vec2                     myTranslation;     //!< texture coordinates translation vector;  (0,0) by default
   unsigned int                       mySamplerRevision; //!< modification counter of parameters related to sampler state
   Graphic3d_TextureUnit              myTextureUnit;     //!< default texture unit to bind texture; Graphic3d_TextureUnit_BaseColor by default
   Graphic3d_TypeOfTextureFilter      myFilter;          //!< texture filter, Graphic3d_TOTF_NEAREST by default
   Graphic3d_LevelOfTextureAnisotropy myAnisoLevel;      //!< level of anisotropy filter, Graphic3d_LOTA_OFF by default
   Graphic3d_TypeOfTextureMode        myGenMode;         //!< texture coordinates generation mode, Graphic3d_TOTM_MANUAL by default
   Standard_Integer                   myBaseLevel;       //!< base texture mipmap level (0 by default)
   Standard_Integer                   myMaxLevel;        //!< maximum texture mipmap array level (1000 by default)
   Standard_ShortReal                 myRotAngle;        //!< texture coordinates rotation angle in degrees, 0 by default
   Standard_Boolean                   myToModulate;      //!< flag to modulate texture with material color, FALSE by default
   Standard_Boolean                   myToRepeat;        //!< flag to repeat (true) or wrap (false) texture coordinates out of [0,1] range
 
 };
 
 DEFINE_STANDARD_HANDLE(Graphic3d_TextureParams, Standard_Transient)
 
 #endif // _Graphic3d_TextureParams_HeaderFile

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