source: downloads/ogre/OgreMain/src/OgreCompositorManager.cpp @ 48

/*
-----------------------------------------------------------------------------
This source file is part of OGRE
    (Object-oriented Graphics Rendering Engine)
For the latest info, see http://www.ogre3d.org/

Copyright (c) 2000-2006 Torus Knot Software Ltd
Also see acknowledgements in Readme.html

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.

You may alternatively use this source under the terms of a specific version of
the OGRE Unrestricted License provided you have obtained such a license from
Torus Knot Software Ltd.
-----------------------------------------------------------------------------
*/
#include "OgreStableHeaders.h"
#include "OgreCompositorManager.h"
#include "OgreCompositor.h"
#include "OgreCompositorChain.h"
#include "OgreCompositionPass.h"
#include "OgreCompositionTargetPass.h"
#include "OgreCompositionTechnique.h"
#include "OgreRoot.h"

namespace Ogre {

template<> CompositorManager* Singleton<CompositorManager>::ms_Singleton = 0;
CompositorManager* CompositorManager::getSingletonPtr(void)
{
        return ms_Singleton;
}
CompositorManager& CompositorManager::getSingleton(void)
{  
        assert( ms_Singleton );  return ( *ms_Singleton );  
}//-----------------------------------------------------------------------
CompositorManager::CompositorManager():
        mRectangle(0)
{
        initialise();

        // Loading order (just after materials)
        mLoadOrder = 110.0f;
        // Scripting is supported by this manager
        mScriptPatterns.push_back("*.compositor");
        ResourceGroupManager::getSingleton()._registerScriptLoader(this);

        // Resource type
        mResourceType = "Compositor";

        // Create default thread serializer instance (also non-threaded)
        OGRE_THREAD_POINTER_SET(mSerializer, new CompositorSerializer());

        // Register with resource group manager
        ResourceGroupManager::getSingleton()._registerResourceManager(mResourceType, this);

}
//-----------------------------------------------------------------------
CompositorManager::~CompositorManager()
{
    freeChains();
        delete mRectangle;

        OGRE_THREAD_POINTER_DELETE(mSerializer);

        // Resources cleared by superclass
        // Unregister with resource group manager
        ResourceGroupManager::getSingleton()._unregisterResourceManager(mResourceType);
        ResourceGroupManager::getSingleton()._unregisterScriptLoader(this);
}
//-----------------------------------------------------------------------
Resource* CompositorManager::createImpl(const String& name, ResourceHandle handle,
    const String& group, bool isManual, ManualResourceLoader* loader,
    const NameValuePairList* params)
{
    return new Compositor(this, name, handle, group, isManual, loader);
}
//-----------------------------------------------------------------------
void CompositorManager::initialise(void)
{
    /// Create "default" compositor
    /** Compositor that is used to implicitly represent the original
        render in the chain. This is an identity compositor with only an output pass:
    compositor Ogre/Scene
    {
        technique
        {
            target_output
            {
                                pass clear
                                {
                                        /// Clear frame
                                }
                pass render_scene
                {
                                        visibility_mask FFFFFFFF
                                        render_queues SKIES_EARLY SKIES_LATE
                }
            }
        }
    };
    */
    CompositorPtr scene = create("Ogre/Scene", ResourceGroupManager::INTERNAL_RESOURCE_GROUP_NAME);
    CompositionTechnique *t = scene->createTechnique();
    CompositionTargetPass *tp = t->getOutputTargetPass();
    tp->setVisibilityMask(0xFFFFFFFF);
        {
                CompositionPass *pass = tp->createPass();
                pass->setType(CompositionPass::PT_CLEAR);
        }
        {
                CompositionPass *pass = tp->createPass();
                pass->setType(CompositionPass::PT_RENDERSCENE);
                /// Render everything, including skies
                pass->setFirstRenderQueue(RENDER_QUEUE_SKIES_EARLY);
                pass->setLastRenderQueue(RENDER_QUEUE_SKIES_LATE);
        }

}
//-----------------------------------------------------------------------
void CompositorManager::parseScript(DataStreamPtr& stream, const String& groupName)
{
#if OGRE_THREAD_SUPPORT
        // check we have an instance for this thread 
        if (!mSerializer.get())
        {
                // create a new instance for this thread - will get deleted when
                // the thread dies
                mSerializer.reset(new CompositorSerializer());
        }
#endif
    mSerializer->parseScript(stream, groupName);
}
//-----------------------------------------------------------------------
CompositorChain *CompositorManager::getCompositorChain(Viewport *vp)
{
    Chains::iterator i=mChains.find(vp);
    if(i != mChains.end())
    {
        return i->second;
    }
    else
    {
        CompositorChain *chain = new CompositorChain(vp);
        mChains[vp] = chain;
        return chain;
    }
}
//-----------------------------------------------------------------------
bool CompositorManager::hasCompositorChain(Viewport *vp) const
{
    return mChains.find(vp) != mChains.end();
}
//-----------------------------------------------------------------------
void CompositorManager::removeCompositorChain(Viewport *vp)
{
    Chains::iterator i = mChains.find(vp);
    if (i != mChains.end())
    {
        delete i->second;
        mChains.erase(i);
    }
}
//-----------------------------------------------------------------------
void CompositorManager::removeAll(void)
{
        freeChains();
        ResourceManager::removeAll();
}
//-----------------------------------------------------------------------
void CompositorManager::freeChains()
{
    Chains::iterator i, iend=mChains.end();
    for(i=mChains.begin(); i!=iend;++i)
    {
        delete i->second;
    }
    mChains.clear();
}
//-----------------------------------------------------------------------
Renderable *CompositorManager::_getTexturedRectangle2D()
{
        if(!mRectangle)
        {
                /// 2D rectangle, to use for render_quad passes
                mRectangle = new Rectangle2D(true);
        }
        RenderSystem* rs = Root::getSingleton().getRenderSystem();
        Viewport* vp = rs->_getViewport();
        Real hOffset = rs->getHorizontalTexelOffset() / (0.5 * vp->getActualWidth());
        Real vOffset = rs->getVerticalTexelOffset() / (0.5 * vp->getActualHeight());
        mRectangle->setCorners(-1 + hOffset, 1 - vOffset, 1 + hOffset, -1 - vOffset);
        return mRectangle;
}
//-----------------------------------------------------------------------
CompositorInstance *CompositorManager::addCompositor(Viewport *vp, const String &compositor, int addPosition)
{
        CompositorPtr comp = getByName(compositor);
        if(comp.isNull())
                return 0;
        CompositorChain *chain = getCompositorChain(vp);
        return chain->addCompositor(comp, addPosition==-1 ? CompositorChain::LAST : (size_t)addPosition);
}
//-----------------------------------------------------------------------
void CompositorManager::removeCompositor(Viewport *vp, const String &compositor)
{
        CompositorChain *chain = getCompositorChain(vp);
        CompositorChain::InstanceIterator it = chain->getCompositors();
        for(size_t pos=0; pos < chain->getNumCompositors(); ++pos)
        {
                CompositorInstance *instance = chain->getCompositor(pos);
                if(instance->getCompositor()->getName() == compositor)
                {
                        chain->removeCompositor(pos);
                        break;
                }
        }
}
//-----------------------------------------------------------------------
void CompositorManager::setCompositorEnabled(Viewport *vp, const String &compositor, bool value)
{
        CompositorChain *chain = getCompositorChain(vp);
        CompositorChain::InstanceIterator it = chain->getCompositors();
        for(size_t pos=0; pos < chain->getNumCompositors(); ++pos)
        {
                CompositorInstance *instance = chain->getCompositor(pos);
                if(instance->getCompositor()->getName() == compositor)
                {
                        chain->setCompositorEnabled(pos, value);
                        break;
                }
        }
}

}