SO3GBufferMaterialPermutation.h

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/*
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This source file is part of OpenSpace3D
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Copyright (c) 2012 I-maginer
 
This program is free software; you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License as published by the Free Software
Foundation; either version 2 of the License, or (at your option) any later
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This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
 
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this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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http://www.gnu.org/copyleft/lesser.txt
 
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*/
 
#ifndef __SO3_DEFERRED_SHADING_GBUFFER_MATERIAL_PERMUTATION_H__
#define __SO3_DEFERRED_SHADING_GBUFFER_MATERIAL_PERMUTATION_H__
 
#include "SO3DeferredPermutation.h"
#include <Ogre.h>
 
namespace SO3
{
 
class SGBufferMaterialPermutation : public SDeferredPermutation<Ogre::uint32>
{
public:
  //The relevant options for objects that are rendered to the GBuffer
  enum GBufferPermutations 
  {
    //(Regular) Textures
    SO3_GBP_NO_TEXTURES         = 0x00000000,
    SO3_GBP_ONE_TEXTURE         = 0x00000001,
    SO3_GBP_TWO_TEXTURES        = 0x00000002,
    SO3_GBP_THREE_TEXTURES      = 0x00000003,
    SO3_GBP_TEXTURE_MASK        = 0x0000000F,
                
    //Material properties
    SO3_GBP_HAS_DIFFUSE_COLOUR  = 0x00000010,
    SO3_GBP_HAS_SPECULAR_COLOUR = 0x00000020,
    SO3_GBP_HAS_EMISSIVE_COLOUR = 0x00000040,
    SO3_GBP_HAS_ALPHA_REJECTION = 0x00000080,
 
    //The number of texture coordinate sets
    SO3_GBP_NO_TEXCOORDS        = 0x00000000,
    SO3_GBP_ONE_TEXCOORD        = 0x00000100,
    SO3_GBP_TWO_TEXCOORDS       = 0x00000200,
    SO3_GBP_TEXCOORD_MASK       = 0x00000700,
 
    // Do we have a normal map
    SO3_GBP_NORMAL_MAP          = 0x00000800,
 
    // Do we have a lightmap
    SO3_GBP_LIGHT_MAP           = 0x00001000,
 
    // Do we have a specular map?
    SO3_GBP_SPECULAR_MAP        = 0x00002000,
 
    //Are we skinned?
    SO3_GBP_SKINNED             = 0x00010000
  };
  static const Ogre::uint32 SO3_GBUFFER_MAT_MASK = 0xFF00FFFF; // The mask of the flags that matter for generating the material
  static const Ogre::uint32 SO3_GBUFFER_VS_MASK  = 0x00FFFF00; // The mask of the flags that matter for generating the vertex shader
  static const Ogre::uint32 SO3_GBUFFER_FS_MASK  = 0x0000FFFF; // The mask of the flags that matter for generating the fragment shader
  Ogre::uint32 flags;
protected:
private:
 
public:
  SGBufferMaterialPermutation();
 
  Ogre::uint32 operator &(const GBufferPermutations& perms);
 
  Ogre::uint32 operator |(const GBufferPermutations& perms);
 
  Ogre::uint32 operator |=(const GBufferPermutations& perms);
protected:
  virtual Ogre::uint32 GetPermutationsImpl();
 
  virtual Ogre::uint32 GetMaterialPermutationsImpl();
 
  virtual Ogre::uint32 GetVertexPermutationsImpl();
 
  virtual Ogre::uint32 GetFragmentPermutationsImpl();
 
  virtual std::string ToStringImpl();
private:
};
 
}
 
#endif