/************************************************************************
 *
 * Copyright (C) 2018-2022 IRCAD France
 * Copyright (C) 2018 IHU Strasbourg
 *
 * This file is part of Sight.
 *
 * Sight 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 3 of the License, or
 * (at your option) any later version.
 *
 * Sight 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 Sight. If not, see <https://www.gnu.org/licenses/>.
 *
 ***********************************************************************/

#include "viz/scene3d/compositor/listener/RayExitDepth.hpp"

#include "viz/scene3d/helper/Technique.hpp"
#include "viz/scene3d/ogre.hpp"

#include <core/spyLog.hpp>

#include <OGRE/OgrePass.h>
#include <OGRE/OgreTechnique.h>

namespace sight::viz::scene3d
{

namespace compositor
{

namespace listener
{

//-----------------------------------------------------------------------------

RayExitDepthListener::RayExitDepthListener()
{
}

//------------------------------------------------------------------------------

RayExitDepthListener::~RayExitDepthListener()
{
}

//------------------------------------------------------------------------------

Ogre::Technique* RayExitDepthListener::handleSchemeNotFound(
    unsigned short /*_schemeIndex*/,
    const Ogre::String& _schemeName,
    Ogre::Material* _originalMaterial,
    unsigned short /*_lodIndex*/,
    const Ogre::Renderable* /*_renderable*/
)
{
    Ogre::Technique* newTechnique = nullptr;
    const auto mtlName            = _originalMaterial->getName();

    if(_schemeName == "VolumeEntries_FrontFacesMin" && !Ogre::StringUtil::startsWith(mtlName, "RTV_Mat"))
    {
        auto entryPointsMtl   = Ogre::MaterialManager::getSingleton().getByName("RayEntryPoints", RESOURCE_GROUP);
        auto frontFaceMinTech = entryPointsMtl->getTechnique("FrontFacesMin");

        newTechnique = viz::scene3d::helper::Technique::copyToMaterial(
            frontFaceMinTech,
            _schemeName,
            _originalMaterial
        );
    }

    return newTechnique;
}

//------------------------------------------------------------------------------

} // namespace listener

} // namespace compositor

} // namespace sight::viz::scene3d
