/***************************************************************************/
/*                                                                         */
/* File: init.cpp                                                          */
/*                                                                         */
/***************************************************************************/

LPDIRECT3D8 g_pD3D = NULL;
LPDIRECT3DDEVICE8 g_pD3DDevice = NULL;


void init(HWND hWnd)
{
    //First of all, create the main D3D object. If it is created successfully we 
    //should get a pointer to an IDirect3D8 interface.
    g_pD3D = Direct3DCreate8(D3D_SDK_VERSION);

    //Get the current display mode
    D3DDISPLAYMODE d3ddm;
    g_pD3D->GetAdapterDisplayMode(D3DADAPTER_DEFAULT, &d3ddm);

    //Create a structure to hold the settings for our device
    D3DPRESENT_PARAMETERS d3dpp; 
    ZeroMemory(&d3dpp, sizeof(d3dpp));

    //Fill the structure. 
    //We want our program to be windowed, and set the back buffer to a format
    //that matches our current display mode
    d3dpp.Windowed = TRUE;
    d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD;
    d3dpp.BackBufferFormat = d3ddm.Format;

	//For depth buffering (e.g.) the z-buffer
	d3dpp.BackBufferCount=1;
	d3dpp.AutoDepthStencilFormat = D3DFMT_D16;
	d3dpp.EnableAutoDepthStencil = TRUE;

    //Create a Direct3D device.
    g_pD3D->CreateDevice(D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, hWnd, D3DCREATE_SOFTWARE_VERTEXPROCESSING, &d3dpp, &g_pD3DDevice);
 
	
	g_pD3DDevice->SetTextureStageState(0, D3DTSS_COLOROP, D3DTOP_SELECTARG1);
	g_pD3DDevice->SetTextureStageState(0,D3DTSS_COLORARG1, D3DTA_TEXTURE);
	g_pD3DDevice->SetTextureStageState(0,D3DTSS_ALPHAOP, D3DTOP_DISABLE);
	g_pD3DDevice->SetTextureStageState(0,D3DTSS_MAGFILTER,D3DTEXF_LINEAR);
	g_pD3DDevice->SetTextureStageState(0,D3DTSS_MAGFILTER,D3DTEXF_LINEAR);

	//Turn on back face culling. This is becuase we want to hide the back of our polygons
    //g_pD3DDevice->SetRenderState(D3DRS_CULLMODE, D3DCULL_CCW);

	//Turn off lighting becuase we are specifying that our vertices have colour
    g_pD3DDevice->SetRenderState(D3DRS_LIGHTING, FALSE);

	//Turn on z-buffering
	g_pD3DDevice->SetRenderState(D3DRS_ZENABLE, D3DZB_TRUE);


}

void de_init()
{
	g_pD3DDevice->Release();
	g_pD3DDevice = NULL;

	g_pD3D->Release();
	g_pD3D = NULL;
}