SO3DeferredShadowManager.h

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/*
-----------------------------------------------------------------------------
This source file is part of OpenSpace3D
For the latest info, see http://www.openspace3d.com
 
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
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
 
-----------------------------------------------------------------------------
*/
 
#ifndef __SO3_DEFERRED_SHADOW_MANAGER_H__
#define __SO3_DEFERRED_SHADOW_MANAGER_H__
 
#include <Ogre.h>
#define SO3_ENABLE_DEFERRED_CUSTOM_SHADOWS 0
 
namespace SO3
{
 
// Material scheme name for shadows generation
#define SO3_DEFERRED_SHADOWS_SCHEME_NAME "SO3/Deferred/Shadows"
 
// Shadow caster material name
#define SO3_DEFERRED_SHADOW_CASTER_NAME "SO3/Deferred/Shadows/Caster"
 
// Seting up usefull names
#define SO3_DEFERRED_SHADOWS_STANDARD_BASE_NAME "/Standard"
#define SO3_DEFERRED_SHADOWS_CUBIC_BASE_NAME    "/Cubic"
#define SO3_DEFERRED_SHADOWS_TEXTURE_NAME       "/Texture"
#define SO3_DEFERRED_SHADOWS_CAMERA_NAME        "/Camera"
#define SO3_DEFERRED_SHADOWS_MATERIAL_NAME      "/Material"
 
class SDeferredShadowManager : public Ogre::Singleton<SDeferredShadowManager>,
                               public Ogre::MaterialManager::Listener
{
public:
protected:
private:
        typedef std::set<Ogre::SceneManager*> OgreSceneManagerList;
        OgreSceneManagerList ogreSceneManagerList;
        typedef std::map<Ogre::SceneManager*, Ogre::Camera*> StandardTextureCameraByScene;
        StandardTextureCameraByScene standardTextureCameraByScene;
        typedef std::map<Ogre::SceneManager*, std::vector<Ogre::Camera*> > CubicTextureCamerasByScene;
        CubicTextureCamerasByScene cubicTextureCamerasByScene;
        Ogre::TexturePtr shadowStandardTexture;
        Ogre::MaterialPtr shadowStandardMaterial;
        bool standardTextureNeedRebuild;
        unsigned short standardTextureFsaa;
        unsigned short standardTextureSize;
        Ogre::PixelFormat standardTexturePixelFormat;
        Ogre::TexturePtr shadowCubicTexture;
        Ogre::MaterialPtr shadowCubicMaterial;
        bool cubicTextureNeedRebuild;
        unsigned short cubicTextureFsaa;
        unsigned short cubicTextureSize;
        Ogre::PixelFormat cubicTexturePixelFormat;
        Ogre::Matrix4 PROJECTIONCLIPSPACE2DTOIMAGESPACE_PERSPECTIVE;
        std::string deferredShadowStandardTextureName;
        std::string deferredShadowStandardCameraName;
        std::string deferredShadowStandardMaterialName;
        std::string deferredShadowCubicTextureName;
        std::string deferredShadowCubicCameraName;
        std::string deferredShadowCubicMaterialName;
  Ogre::ShadowCameraSetup* spotShadowCameraSetup;
  Ogre::ShadowCameraSetup* pointShadowCameraSetup;
  Ogre::ShadowCameraSetup* directionalShadowCameraSetup;
 
public:
        SDeferredShadowManager();
 
        ~SDeferredShadowManager();
 
        static SDeferredShadowManager& getSingleton();
 
        static SDeferredShadowManager* getSingletonPtr();
 
        void RegisterSceneManager(Ogre::SceneManager* targetScene);
 
        void UnregisterSceneManager(Ogre::SceneManager* existingScene);
 
        void SetShadowTextureSize(unsigned short size);
 
        void SetShadowTexturePixelFormat(Ogre::PixelFormat fmt);
      
  void SetShadowTextureFSAA(unsigned short fsaa);
 
        void SetShadowStandardTextureSize(unsigned short size);
 
        void SetShadowStandardTexturePixelFormat(Ogre::PixelFormat fmt);
 
        void SetShadowStandardTextureFSAA(unsigned short fsaa);
 
        void SetShadowCubicTextureSize(unsigned short size);
 
        void SetShadowCubicTexturePixelFormat(Ogre::PixelFormat fmt);
 
        void SetShadowCubicTextureFSAA(unsigned short fsaa);
 
        Ogre::TexturePtr& PrepareShadowTexture(Ogre::Camera* ogreCamera, Ogre::Viewport* ogreViewport, const Ogre::Light* light, Ogre::Pass* ogrePass);
 
        virtual Ogre::Technique* handleSchemeNotFound(unsigned short schemeIndex, const Ogre::String& schemeName, Ogre::Material* originalMaterial, unsigned short lodIndex, const Ogre::Renderable* rend);
protected:
private:
        void CreateShadowStandardTexture();
 
        void CreateShadowCubicTexture();
 
        void DestroyShadowStandardTexture();
 
        void DestroyShadowCubicTexture();
 
        void PrepareShadowTextureImpl(Ogre::SceneManager* ogreTargetScene, Ogre::Camera* ogreCamera, Ogre::Viewport* ogreViewport, const Ogre::Light* ogreLight);
 
        void PrepareShadowCubicTextureImpl(Ogre::SceneManager* ogreTargetScene, Ogre::Camera* ogreCamera, Ogre::Viewport* ogreViewport, const Ogre::Light* ogreLight);
};
 
}
 
#endif