SO3RtssCustom.h

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/*
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This source file is part of OpenSpace3D
For the latest info, see http://www.openspace3d.com
 
Copyright (c) 2023 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
version.
 
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.
 
You should have received a copy of the GNU Lesser General Public License along with
this program; if not, write to the Free Software Foundation, Inc., 59 Temple
Place - Suite 330, Boston, MA 02111-1307, USA, or go to
http://www.gnu.org/copyleft/lesser.txt
 
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*/
 
#ifndef __SO3RTSS_CUSTOM_H__
#define __SO3RTSS_CUSTOM_H__
 
#include "SCOLBasic/SO3Prerequisites.h"
#include "SO3Renderer/SO3Root.h"
#include "OgreShaderPrecompiledHeaders.h"
 
//From Ogre::RTShader::LayeredBlending
namespace SO3
{
  extern const Ogre::String SRS_ADV_COOK_TORRANCE_LIGHTING;
  class AdvancedCookTorranceLighting : public Ogre::RTShader::SubRenderState
  {
  public:
    AdvancedCookTorranceLighting();
 
    const Ogre::String& getType() const override;
 
    int getExecutionOrder() const override { return Ogre::RTShader::FFP_LIGHTING; }
 
    void copyFrom(const Ogre::RTShader::SubRenderState& rhs) override;
 
    bool preAddToRenderState(const Ogre::RTShader::RenderState* renderState, Ogre::Pass* srcPass, Ogre::Pass* dstPass) override;
 
    const Ogre::String& getMetalRoughnessMapName() const { return mMetalRoughnessMapName; }
 
    bool setParameter(const Ogre::String& name, const Ogre::String& value) override;
 
    bool createCpuSubPrograms(Ogre::RTShader::ProgramSet* programSet) override;
 
  private:
    Ogre::String mMetalRoughnessMapName;
    bool mUseOcclusion;
    int mLightCount;
    uint8 mMRMapSamplerIndex;
    Ogre::int8 mLtcLUT1SamplerIndex;
  };
 
  class AdvancedCookTorranceLightingFactory : public Ogre::RTShader::SubRenderStateFactory
  {
  public:
    const Ogre::String& getType() const override;
 
    Ogre::RTShader::SubRenderState* createInstance(Ogre::ScriptCompiler* compiler, Ogre::PropertyAbstractNode* prop, Ogre::Pass* pass,
      Ogre::RTShader::SGScriptTranslator* translator) override;
    void writeInstance(Ogre::MaterialSerializer* ser, Ogre::RTShader::SubRenderState* subRenderState, Ogre::Pass* srcPass, Ogre::Pass* dstPass) override;
 
  protected:
    Ogre::RTShader::SubRenderState* createInstanceImpl() override;
  };
 
}
 
#endif