ShaderUtil.h

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/********************************************************************
**                Image Component Library (ICL)                    **
**                                                                 **
** Copyright (C) 2006-2013 CITEC, University of Bielefeld          **
**                         Neuroinformatics Group                  **
** Website: www.iclcv.org and                                      **
**          http://opensource.cit-ec.de/projects/icl               **
**                                                                 **
** File   : ICLGeom/src/ICLGeom/ShaderUtil.h                       **
** Module : ICLGeom                                                **
** Authors: Matthias Esau                                          **
**                                                                 **
**                                                                 **
** GNU LESSER GENERAL PUBLIC LICENSE                               **
** This file may be used under the terms of the GNU Lesser General **
** Public License version 3.0 as published by the                  **
**                                                                 **
** Free Software Foundation and appearing in the file LICENSE.LGPL **
** included in the packaging of this file.  Please review the      **
** following information to ensure the license requirements will   **
** be met: http://www.gnu.org/licenses/lgpl-3.0.txt                **
**                                                                 **
** The development of this software was supported by the           **
** Excellence Cluster EXC 277 Cognitive Interaction Technology.    **
** The Excellence Cluster EXC 277 is a grant of the Deutsche       **
** Forschungsgemeinschaft (DFG) in the context of the German       **
** Excellence Initiative.                                          **
**                                                                 **
********************************************************************/

#pragma once
#include <ICLUtils/CompatMacros.h>
#include <ICLGeom/Primitive.h>
#include <ICLGeom/GeomDefs.h>
#include <ICLGeom/SceneLight.h>

#include <ICLUtils/Uncopyable.h>

namespace icl{
  namespace qt {class GLFragmentShader;}
  namespace geom{

    class ICLGeom_API ShaderUtil : public utils::Uncopyable{
      const Camera *m_camera;
      icl::qt::GLFragmentShader** m_shaders;
      icl::qt::GLFragmentShader* activeShader;
      const std::vector<Mat> *project2shadow;
      float m_shadowBias;
      bool renderingShadow;
      public:
      enum ShaderType{SHADOW, SHADOW_TEXTURE, NO_SHADOW, NO_SHADOW_TEXTURE, COUNT};
      ShaderUtil(const Camera *camera, icl::qt::GLFragmentShader** shaders, const std::vector<Mat> *project2shadow, float shadowBias);
      ShaderUtil();

      void activateShader(Primitive::Type type, bool withShadow);
      void deactivateShaders();
      const Camera &getCurrentCamera() const ;
      static void recompilePerPixelShader(icl::qt::GLFragmentShader** shaders, const icl::utils::SmartPtr<SceneLight>* lights, int numShadowLights);
    };
  }
}