#include "stdafx.h"
#include "ITexture.h"
#include "IEngine.h"
#include "IResourcefactory.h"
#include "RenderTargetTexture.h"


RenderTargetTexture::RenderTargetTexture(IEngine& argEngine)
	: RenderTargetBase(argEngine)
	, m_Texture(NULL)
{
}


RenderTargetTexture::~RenderTargetTexture()
{
	delete m_Texture;
	m_Engine.get_ResourceFactory().DeleteRenderTargetTexture(*const_cast<RenderTargetTexture*>(this), true);
}


void RenderTargetTexture::SetTextureParameters(uint32 argWidth, uint32 argHeight, DataFormat::Enumeration argFormat, uint32 argMultiSampleCount, uint32 argMultiSampleQuality)
{
	if (argWidth == this->get_RenderTargetWidth() &&
		argHeight == this->get_RenderTargetHeight() &&
		argFormat == this->get_RenderTargetFormat() &&
		m_MultiSampleCount == argMultiSampleCount &&
		m_MultiSampleQuality == argMultiSampleQuality)
	{
		return;
	}

	RenderTargetBase::Uninitialize();

	// get missing information
	if (argMultiSampleCount == 0)
		argMultiSampleCount = 1;
	if (argWidth == 0)
		argWidth = 1;
	if (argHeight == 0)
		argHeight = 1;
	if (argFormat == DataFormat::Unknown)
		argFormat = DataFormat::R8G8B8A8_UnsignedNormalized;

	if (m_Texture == NULL)
		m_Texture = &m_Engine.get_ResourceFactory().CreateOrFindTexture();
	
	m_MultiSampleCount = argMultiSampleCount;
	m_MultiSampleQuality = argMultiSampleQuality;
	m_Texture->CreateRenderTargetTexture(argWidth, argHeight, argFormat, argMultiSampleCount, argMultiSampleQuality);

	HRESULT lh_Result = m_Engine.get_DX10Device().CreateRenderTargetView(m_Texture->get_Texture2D(), NULL, &m_RenderTargetView);
	if(FAILED(lh_Result))
		throw L"RenderTargetTexture: Unable to retrieve rendertarget view.";

	ViewPort viewPort;
	viewPort.m_Width = argWidth;
	viewPort.m_Height = argHeight;
	this->set_ViewPort(viewPort);
}



void RenderTargetTexture::Resize(int argWidth, int argHeight)
{
	if (m_Texture == NULL)
		throw L"SwapChainResource: Access forbidden until resource has been initialized.";

	if (this->get_RenderTargetWidth() == argWidth
		|| this->get_RenderTargetHeight() == argHeight)
		return;

	bool lb_DepthStencilBuffer = this->get_HasDepthStencilBuffer();

	this->SetTextureParameters(argWidth, argHeight, this->get_RenderTargetFormat(), m_MultiSampleCount, m_MultiSampleQuality);
	
	this->set_HasDepthStencilBuffer(lb_DepthStencilBuffer);
}


void RenderTargetTexture::Uninitialize()
{
	if (m_Texture != NULL)
		m_Engine.get_ResourceFactory().DeleteTexture(*m_Texture);

	RenderTargetBase::Uninitialize();
}


uint32 RenderTargetTexture::get_RenderTargetWidth() const
{
	return m_Texture == NULL ? 0 : m_Texture->get_TextureWidth();
}


uint32 RenderTargetTexture::get_RenderTargetHeight() const
{
	return m_Texture == NULL ? 0 : m_Texture->get_TextureHeight();
}


DataFormat::Enumeration RenderTargetTexture::get_RenderTargetFormat() const
{
	return m_Texture == NULL ? DataFormat::Unknown : m_Texture->get_TextureFormat();
}