#include <windows.h>
#include <windowsx.h>
#include <d3d9.h>
 
#pragma comment (lib, "d3d9.lib")
 
LPDIRECT3D9 d3d;
LPDIRECT3DDEVICE9 d3ddev;
 
void initD3D(HWND hWnd);
void render_frame(void);
void cleanD3D(void);
 
LRESULT CALLBACK WindowProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam);
 
int WINAPI WinMain(HINSTANCE hInstance,
				   HINSTANCE hPrevInstance,
				   LPSTR lpCmdLine,
				   int nCmdShow)
{
	HWND hWnd;
	WNDCLASSEX wc;
 
	ZeroMemory(&wc, sizeof(WNDCLASSEX));
 
	wc.cbSize = sizeof(WNDCLASSEX);
	wc.style = CS_HREDRAW | CS_VREDRAW;
	wc.lpfnWndProc = WindowProc;
	wc.hInstance = hInstance;
	wc.hCursor = LoadCursor(NULL, IDC_ARROW);
	wc.hbrBackground = (HBRUSH)COLOR_WINDOW;
	wc.lpszClassName = "WindowClass";
 
	RegisterClassEx(&wc);
 
	hWnd = CreateWindowEx(NULL,
					      "WindowClass",
						  "Our First Direct3D Program",
						  WS_OVERLAPPEDWINDOW,
						  300, 300,
						  800, 800,
						  NULL,
						  NULL,
						  hInstance,
						  NULL);
 
	ShowWindow(hWnd, nCmdShow);
 
	initD3D(hWnd);
 
	MSG msg;
 
	while(TRUE)
	{
		while(PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
		{
			TranslateMessage(&msg);
			DispatchMessage(&msg);
		}
		if(msg.message == WM_QUIT)
			break;
 
		render_frame();
	}
 
	cleanD3D();
 
	return msg.wParam;
}
 
void initD3D(HWND hWnd)
{
	d3d = Direct3DCreate9(D3D_SDK_VERSION);
 
	D3DPRESENT_PARAMETERS d3dpp;
 
	ZeroMemory(&d3dpp, sizeof(d3dpp));
	d3dpp.Windowed = TRUE;
	d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD;
	d3dpp.hDeviceWindow = hWnd;
 
	d3d->CreateDevice(D3DADAPTER_DEFAULT,
					  D3DDEVTYPE_HAL,
					  hWnd,
					  D3DCREATE_SOFTWARE_VERTEXPROCESSING,
					  &d3dpp,
					  &d3ddev);
}
 
void render_frame(void)
{
 
	d3ddev->Clear(0, NULL, D3DCLEAR_TARGET, D3DCOLOR_XRBG(0, 40, 0), 1.0f, 0);
 
	d3ddev->BeginScene();
 
 
 
	d3ddev->EndScene();
 
	d3ddev->Present(NULL, NULL, NULL, NULL);
}
 
 
void cleanD3D(void)
{
	d3ddev->Release();
	d3d->Release();
}