RenderTexture.cpp

#include "RenderTexture.h"
#include "Utility.h"

RenderTexture::RenderTexture()
{
	renderTargetTexture = 0;
	renderTargetView = 0;
	shaderResourceView = 0;
}


RenderTexture::RenderTexture(const RenderTexture& other)
{

}


RenderTexture::~RenderTexture()
{
    SafeRelease(renderTargetView);
    SafeRelease(shaderResourceView);
}

bool RenderTexture::Init(ID3D11Device* device, int textureWidth, int textureHeight)
{
	HRESULT result;
    D3D11_TEXTURE2D_DESC textureDesc;
	ZeroMemory(&textureDesc, sizeof(textureDesc));

	textureDesc.Width = textureWidth;
	textureDesc.Height = textureHeight;
	textureDesc.MipLevels = 1;
	textureDesc.ArraySize = 1;
	textureDesc.Format = DXGI_FORMAT_R32G32B32A32_FLOAT;
	textureDesc.SampleDesc.Count = 1;
	textureDesc.Usage = D3D11_USAGE_DEFAULT;
	textureDesc.BindFlags = D3D11_BIND_RENDER_TARGET | D3D11_BIND_SHADER_RESOURCE;
	textureDesc.CPUAccessFlags = 0;
	textureDesc.MiscFlags = 0;

	result = device->CreateTexture2D(&textureDesc, NULL, &renderTargetTexture);
	if(FAILED(result))
	{
		return false;
	}

    D3D11_RENDER_TARGET_VIEW_DESC renderTargetViewDesc;
	renderTargetViewDesc.Format = textureDesc.Format;
	renderTargetViewDesc.ViewDimension = D3D11_RTV_DIMENSION_TEXTURE2D;
	renderTargetViewDesc.Texture2D.MipSlice = 0;

	result = device->CreateRenderTargetView(renderTargetTexture, &renderTargetViewDesc, &renderTargetView);
	if(FAILED(result))
	{
		return false;
	}

    D3D11_SHADER_RESOURCE_VIEW_DESC shaderResourceViewDesc;
	shaderResourceViewDesc.Format = textureDesc.Format;
	shaderResourceViewDesc.ViewDimension = D3D11_SRV_DIMENSION_TEXTURE2D;
	shaderResourceViewDesc.Texture2D.MostDetailedMip = 0;
	shaderResourceViewDesc.Texture2D.MipLevels = 1;

	result = device->CreateShaderResourceView(renderTargetTexture, &shaderResourceViewDesc, &shaderResourceView);
	if(FAILED(result))
	{
		return false;
	}
    SafeRelease(renderTargetTexture);
	return true;
}

void RenderTexture::SetRenderTarget(ID3D11DeviceContext* deviceContext, ID3D11DepthStencilView* depthStencilView)
{
	deviceContext->OMSetRenderTargets(1, &renderTargetView, depthStencilView);
	return;
}

void RenderTexture::ClearRenderTarget(ID3D11DeviceContext* deviceContext, ID3D11DepthStencilView* depthStencilView, 
					   float red, float green, float blue, float alpha)
{
	float color[4];

	color[0] = red;
	color[1] = green;
	color[2] = blue;
	color[3] = alpha;

	deviceContext->ClearRenderTargetView(renderTargetView, color);
    
	deviceContext->ClearDepthStencilView(depthStencilView, D3D11_CLEAR_DEPTH, 1.0f, 0);

}

ID3D11ShaderResourceView* RenderTexture::GetShaderResourceView()
{
	return shaderResourceView;
}