#include "Light.h"
#include "Utilities.h"

UINT Light::init(ID3D11Device* pD3DDevice, LightBuffer& lightData)
{
    D3D11_BUFFER_DESC desc = {};
    desc.ByteWidth = sizeof(LightBuffer);
    desc.BindFlags = D3D11_BIND_CONSTANT_BUFFER;
    desc.Usage = D3D11_USAGE_IMMUTABLE; // no light update possible
    //desc.Usage = D3D11_USAGE_DYNAMIC; // light update possible

    D3D11_SUBRESOURCE_DATA initialData = {};
    initialData.pSysMem = &lightData;

    HRESULT hr = pD3DDevice->CreateBuffer(&desc, &initialData, &_pLightBuffer);
    CheckFailed(hr, 70);

    return 0;
}

void Light::update(FLOAT dt)
{
}

void Light::render(ID3D11DeviceContext* pD3DDeviceContext)
{
    pD3DDeviceContext->PSSetConstantBuffers(0, 1, &_pLightBuffer);
}

void Light::deInit()
{
    safeRelease(_pLightBuffer);
}