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//Declarations and prototypes
LPDIRECT3D9 d3d; // the pointer to our Direct3D interface
LPDIRECT3DDEVICE9 d3ddev; // the pointer to the device class
LPD3DXSPRITE d3dspt; // the pointer to our Direct3D Sprite interface
LPDIRECT3DTEXTURE9 sprite; // the pointer to the sprite
void initD3D(HWND hWnd); // sets up and initializes Direct3D
void render_frame(void); // renders a single frame
void cleanD3D(void); // closes Direct3D and releases memory
// the WindowProc function prototype
LRESULT CALLBACK WindowProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam);
int WINAPI WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow)
{
MSG msg;
WNDCLASSEX wc;
ZeroMemory(&wc, sizeof(WNDCLASSEX));
wc.cbSize = sizeof(WNDCLASSEX);
wc.style = CS_HREDRAW | CS_VREDRAW;
wc.lpfnWndProc = (WNDPROC)WindowProc;
wc.hInstance = hInstance;
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
wc.lpszClassName = L"WindowClass1";
wc.hbrBackground = (HBRUSH)COLOR_WINDOW;
RegisterClassEx(&wc);
HWND hWnd = CreateWindowEx(NULL,
L"WindowClass1",
L"Game",
WS_OVERLAPPEDWINDOW,
100, 100,
800, 600,
NULL,
NULL,
hInstance,
NULL);
//Initialize window and directx
ShowWindow(hWnd, nCmdShow);
initD3D(hWnd);
while(TRUE)
{
// find out the starting time of each loop
DWORD starting_point = GetTickCount();
// Check to see if any messages are waiting in the queue
if (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
{
if (msg.message == WM_QUIT)
break;
TranslateMessage(&msg);
DispatchMessage(&msg);
}
render_frame();
if(KEY_DOWN(VK_ESCAPE))
PostMessage(hWnd, WM_DESTROY, 0, 0);
//Make the frame rate consistant
while ((GetTickCount() - starting_point) < 25);
}
//clean up DirectX and exit
cleanD3D();
return msg.wParam;
}
// this is the main message handler for the program
LRESULT CALLBACK WindowProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
switch(message)
{
case WM_DESTROY:
{
PostQuitMessage(0);
return 0;
} break;
}
return DefWindowProc (hWnd, message, wParam, lParam);
}
//--------------------------------------------------------------//
// DirectX functions: //
// Setup neccessary directx components and render images. //
//--------------------------------------------------------------//
// this function initializes and prepares Direct3D for use
void initD3D(HWND hWnd)
{
d3d = Direct3DCreate9(D3D_SDK_VERSION);
D3DPRESENT_PARAMETERS d3dpp;
ZeroMemory(&d3dpp, sizeof(d3dpp)); // clear out the struct for use
d3dpp.Windowed = TRUE; // program windowed, not fullscreen
d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD; // discard old frames
d3dpp.hDeviceWindow = hWnd; // set the window to be used by Direct3D
d3dpp.BackBufferFormat = D3DFMT_X8R8G8B8;
d3dpp.BackBufferWidth = SCREEN_WIDTH;
d3dpp.BackBufferHeight = SCREEN_HEIGHT;
// create a device class using this information and the info from the d3dpp stuct
d3d->CreateDevice(D3DADAPTER_DEFAULT,
D3DDEVTYPE_HAL,
hWnd,
D3DCREATE_SOFTWARE_VERTEXPROCESSING,
&d3dpp,
&d3ddev);
D3DXCreateSprite(d3ddev, &d3dspt); // create the Direct3D Sprite object
D3DXCreateTextureFromFile(d3ddev, L"Panel1.png", &sprite);
return;
}
// this is the function used to render a single frame
void render_frame(void)
{
// clear the window to a deep blue
d3ddev->Clear(0, NULL, D3DCLEAR_TARGET, D3DCOLOR_XRGB(0, 0, 0), 1.0f, 0);
d3ddev->BeginScene(); // begins the 3D scene
d3dspt->Begin(NULL); // begin sprite drawing
// draw the sprite
D3DXVECTOR3 center(0.0f, 0.0f, 0.0f);
D3DXVECTOR3 position(0.0f, 0.0f, 0.0f);
d3dspt->Draw(sprite, NULL, ¢er, &position, D3DCOLOR_XRGB(255, 255, 255));
d3dspt->End(); // end sprite drawing
d3ddev->EndScene(); // ends the 3D scene
d3ddev->Present(NULL, NULL, NULL, NULL);
return;
}
// this is the function that cleans up Direct3D and COM
void cleanD3D(void)
{
sprite->Release();
d3ddev->Release();
d3d->Release();
return;
}
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