genesis-3d_engine/Engine/app/Lightmap/lightmapSetting.cc

/****************************************************************************
Copyright (c) 2011-2013,WebJet Business Division,CYOU

http://www.genesis-3d.com.cn

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****************************************************************************/
#include "stdneb.h"
#include "lightmapSetting.h"
#include "rendersystem/base/RenderDeviceTypes.h"
#include "app/appframework/actormanager.h"
#include "app/graphicfeature/components/meshrendercomponent.h"
#include "app/terrainfeature/components/TerrainRenderComponent.h"

namespace App
{

	//------------------------------------------------------------------------
	LightmapSetting::LightmapSetting()
	{
	}

	//------------------------------------------------------------------------
	LightmapSetting::~LightmapSetting()
	{
		ClearLightmapInfos();
	}
	//------------------------------------------------------------------------
	RenderBase::TextureHandle LightmapSetting::GetLightmapTexHandle(int lightmapIndex,int subIndex)
	{
		Resources::ResourceId lightmapID = Resources::ResourceManager::DefaultTextureID;
		RenderBase::TextureHandle  lightmapHandle;

		IndexT finalIndex = lightmapIndex << 2 | subIndex;
		IndexT indexOfName = indexToName.FindIndex( finalIndex );

		if ( indexOfName != InvalidIndex)
		{
			lightmapID = indexToName.ValueAtIndex( indexOfName );

			IndexT findtex = m_LightmapInfos.FindIndex( lightmapID );

			GPtr<Resources::TextureResInfo> texRI;

			if ( findtex != InvalidIndex )
			{
				texRI = m_LightmapInfos.ValueAtIndex(findtex);

				n_assert(texRI->GetResID() == lightmapID);
			}
			else
			{
				// it is Synchronization ,that is used by editor;
				texRI = Resources::ResourceManager::Instance()->CreateTextureInfo(lightmapID,0);
				m_LightmapInfos.Add(lightmapID,texRI);
			}
			// Do this use Default Resource.
			if ( !texRI->IsDefaultResUsed() )
			{
				lightmapHandle = texRI->GetHandle();
			}
		}
		
		return lightmapHandle;
	}

	void LightmapSetting::PreLoadLightmaps()
	{
		LightmapIndexToName::Iterator itBegin = indexToName.Begin();
		LightmapIndexToName::Iterator itEnd = indexToName.End();

		for (; itBegin != itEnd; ++itBegin)
		{
			int lightmapIndex = itBegin->Key();
			int subIndex = lightmapIndex & 0x03;
			// load the lightmap
			GetLightmapTexHandle( lightmapIndex, subIndex );
		}
	}

	void LightmapSetting::ClearLightmapInfos()
	{
		m_LightmapInfos.Clear();
		indexToName.Clear();
	}

#ifdef __GENESIS_EDITOR__
	void LightmapSetting::UpdateLightmaps()
	{
		LightMapInfos::Iterator itBegin = m_LightmapInfos.Begin();
		LightMapInfos::Iterator itEnd = m_LightmapInfos.End();

		for (; itBegin != itEnd; ++itBegin)
		{
			Resources::ResourceId resID = itBegin->Key();
			// reflush the lightmap texture
			Resources::ResourceManager::Instance()->UpdateTexResource( resID );
		}

		// refresh all components that used lightmap
		App::ActorManager* pActorMgr = App::ActorManager::Instance();
		Util::Array<GPtr<App::MeshRenderComponent>> pMeshRenderComponents;

		SizeT componentCounts = pActorMgr->GetAllActorComponents(pMeshRenderComponents);
		for ( IndexT i = 0; i < componentCounts; ++i )
		{
			GPtr<App::MeshRenderComponent>& pMeshRenderComponent = pMeshRenderComponents[i];

			if ( pMeshRenderComponent->IsUseLM() )
			{
				pMeshRenderComponent->SetLMDirty();
			}
		}

		Util::Array<GPtr<App::TerrainRenderComponent>> pTerrainRenderComponents;

		componentCounts = pActorMgr->GetAllActorComponents(pTerrainRenderComponents);
		for ( IndexT i = 0; i < componentCounts; ++i )
		{
			GPtr<App::TerrainRenderComponent>& pTerrainRenderComponent = pTerrainRenderComponents[i];

			if ( pTerrainRenderComponent->IsUseLM() )
			{
				pTerrainRenderComponent->SetLMDirty();
			}
		}
	}

	void LightmapSetting::UpdateSingleLightmap(Resources::ResourceId resID)
	{
		//index can be used when lightmap files is useless ,for recoveing when delete lightmap files;
		LightmapIndexToName::Iterator itBegin = indexToName.Begin();
		LightmapIndexToName::Iterator itEnd = indexToName.End();
		unsigned int lightmapIndex = 0xFF << 2;;

		for (; itBegin != itEnd; ++itBegin)
		{
			Resources::ResourceId currentResID = itBegin->Value();

			if (currentResID == resID)
			{
				lightmapIndex = itBegin->Key();
				break;
			}
		}

		if (0xFF == (lightmapIndex >> 2))
		{
			// we dont use this resource
			return;
		}
		
		// refresh all meshRenderComponent that use this lightmap
		App::ActorManager* pActorMgr = App::ActorManager::Instance();
		Util::Array<GPtr<App::MeshRenderComponent>> pMeshRenderComponents;

		SizeT componentCounts = pActorMgr->GetAllActorComponents(pMeshRenderComponents);
		for ( IndexT i = 0; i < componentCounts; ++i )
		{
			GPtr<App::MeshRenderComponent>& pMeshRenderComponent = pMeshRenderComponents[i];
			bool bEnableLightmap = pMeshRenderComponent->IsUseLM();

			if ( pMeshRenderComponent->IsUseLM() )
			{
				unsigned int  currLightmapIndex = pMeshRenderComponent->GetLMIndex();

				if (currLightmapIndex == (lightmapIndex >> 2))
				{
					pMeshRenderComponent->SetLMDirty();
				}
			}
		}

		// refresh all terrainRenderComponent that use this lightmap
		Util::Array<GPtr<App::TerrainRenderComponent>> pTerrainRenderComponents;

		componentCounts = pActorMgr->GetAllActorComponents(pTerrainRenderComponents);

		for ( IndexT i = 0; i < componentCounts; ++i )
		{
			GPtr<App::TerrainRenderComponent>& pTerrainRenderComponent = pTerrainRenderComponents[i];
			bool bEnableLightmap = pTerrainRenderComponent->IsUseLM();

			if ( pTerrainRenderComponent->IsUseLM() )
			{
				unsigned int  currLightmapIndex = pTerrainRenderComponent->GetLMIndex();

				if (currLightmapIndex == (lightmapIndex >> 2))
				{
					pTerrainRenderComponent->SetLMDirty();
				}
			}
		}

	}
#endif
	void LightmapSetting::SetLightmap(int lightmapIndex, int subIndex, Util::String & lightmapName)
	{
		n_assert(subIndex >= 0 && subIndex <= 2);

		IndexT finalIndex = lightmapIndex << 2 | subIndex;
		IndexT indexOfName = indexToName.FindIndex(finalIndex);

		if ( indexOfName != InvalidIndex)
		{
			LightmapIndexToName::key_value_pair_type & pair = indexToName.KeyValuePairAtIndex( indexOfName );
			pair.Value() = lightmapName;
		}
		else
		{
			indexToName.Add(finalIndex, lightmapName);
		}
	}

	void LightmapSetting::SetLightmap(int lightmapCombinIndex, Util::String & lightmapName)
	{
		IndexT indexOfName = indexToName.FindIndex(lightmapCombinIndex);

		if ( indexOfName != InvalidIndex)
		{
			LightmapIndexToName::key_value_pair_type & pair = indexToName.KeyValuePairAtIndex( indexOfName );
			pair.Value() = lightmapName;
		}
		else
		{
			indexToName.Add(lightmapCombinIndex, lightmapName);
		}
	}

	void LightmapSetting::GetLightmap( int lightmapIndex, int subIndex, LightmapName &LightmapName ) const
	{
		IndexT finalIndex = lightmapIndex << 2 | subIndex;
		IndexT indexOfName = indexToName.FindIndex( finalIndex );

		if ( indexOfName != InvalidIndex )
		{
			LightmapIndexToName::key_value_pair_type& pair = indexToName.KeyValuePairAtIndex( indexOfName );
			LightmapName = pair.Value();
		}
	}

}