#include "OgreSceneCameraDepthRenderingRun.h"
#include "OgreTechniqueGroup.h"


OgreSceneCameraDepthRenderingRun::OgreSceneCameraDepthRenderingRun(OgreSharedRuns* sharedRuns,
																	String name,
																		Viewport* playerView
														   )
														   :SceneCameraDepthRenderingRun()
														   , OgreRenderingRun(1, 1)
														   , RenderingRun(1, 1)
{
	this->sharedRuns = sharedRuns;
	this->name = name;
	this->playerView = playerView;
	
	createDepthMap();	
}

void OgreSceneCameraDepthRenderingRun::createDepthMap()
{
	int width = playerView->getActualWidth();
	int height = playerView->getActualHeight();
	TexturePtr texPtr = Ogre::TextureManager::getSingleton().createManual(name, 
																		"default",
																		TEX_TYPE_2D,
																		width,
																		height,
																		0,
																		0,
																		PF_FLOAT16_RGBA,
																		TU_RENDERTARGET);
	 depthTexture = texPtr.getPointer();
	 playerCamera = playerView->getCamera();
	 //add viewport to rendertarget
	 HardwarePixelBuffer* hpb = (depthTexture->getBuffer()).getPointer();
	 RenderTarget* rt = hpb->getRenderTarget();
	 Viewport* v = rt->addViewport(playerCamera);
	 v->setOverlaysEnabled(false);
	 rt->setAutoUpdated(false);
}

bool  OgreSceneCameraDepthRenderingRun::renderableQueued (Renderable *rend, uint8 groupID, ushort priority, Technique **ppTech)
{
	if((*ppTech)->isTransparent())
		return false;

	OgreTechniqueGroup* TG = (OgreTechniqueGroup*) rend->getRenderTechniqueGroup();
	if(TG)
	{
		String materialToSet = String("GTP/Basic/CameraDepth");
		String triggeredMaterial = TG->getMaterialNameForTrigger("ILLUM_TRIGGER_CAMERADEPTH");
		if(triggeredMaterial != "")//a trigger is associated
			materialToSet = triggeredMaterial;
		Technique* techn = ((Material*)MaterialManager::getSingleton().getByName(	materialToSet ).getPointer())->getTechnique(0);
		*ppTech = techn;	
	}
	return true;
}

void OgreSceneCameraDepthRenderingRun::updateFrame(unsigned long frameNum)
{
	
	//setMaterialForVisibles(String("GTP/Basic/CameraDepth"), playerCamera, false, true, "ILLUM_TRIGGER_CAMERADEPTH");
	RenderQueue* rq = Root::getSingleton()._getCurrentSceneManager()->getRenderQueue();		
	rq->setRenderableListener(this);

	RenderTarget* rt = depthTexture->getBuffer().getPointer()->getRenderTarget();

	float farPlane = rt->getViewport(0)->getCamera()->getFarClipDistance();
	//ColourValue backColor(1,1,1,1);
	ColourValue backColor(0,0,0,0);
	//ColourValue backColor(farPlane,farPlane,farPlane,1);
	rt->getViewport(0)->setBackgroundColour(backColor);
	
	
	sharedRuns->getRoot()->hide();

	rt->update();	

	//rt->writeContentsToFile("cameraDepth.bmp");
	
	//restoreMaterials();

	sharedRuns->getRoot()->restoreVisibility();
	rq->setRenderableListener(0);
}

void OgreSceneCameraDepthRenderingRun::freeAllResources()
{
	this->depthTexture = 0;
	TextureManager::getSingleton().remove(name);	
}