www.pudn.com > CDX.rar > Ex4.cpp

// ------------------------------------------------------------------------------------------ 
// CDX example 4 - Fullscreen scrolling & keyboard input 
// You must link to cdx.lib, ddraw.lib, dinput and dxguid 
// ------------------------------------------------------------------------------------------ 
 
#include  
#include  
#include  
 
#define CDXINCLUDEALL           // include all CDX headers 
#include  
 
CDXScreen   * Screen    = 0;    // The screen object, every program must have one 
CDXTile     * Tiles     = 0;    // The background tiles 
CDXMap      * Map       = 0;    // The scrolling map object 
CDXInput    * Input     = 0;    // The input object 
 
BOOL        bActive     = TRUE;                 // Is the program running? 
char        Bitmap[]    = "TILES.BMP";          // tiles filename 
RECT        Window      = { 0, 0, 640, 480 };   // clip rectangle 
 
#define NAME		"CDXExample4" 
#define TITLE		"CDX Example 4" 
 
 
// ------------------------------------------------------------------------------------------ 
// FiniApp - Destroy the CDX objects 
// ------------------------------------------------------------------------------------------ 
void FiniApp(void) 
{ 
	SAFEDELETE( Map ); 
	SAFEDELETE( Tiles ); 
	SAFEDELETE( Screen ); 
} 
 
 
// ------------------------------------------------------------------------------------------ 
// WinProc, this handles all windows messages 
// ------------------------------------------------------------------------------------------ 
long PASCAL WinProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam) 
{ 
	switch(message) 
	{ 
		case WM_ACTIVATEAPP:    bActive = wParam;   // set if app is active or not 
			                    break; 
 
		case WM_KEYDOWN:		switch(wParam)      // if ESC key is hit, quit program 
			                    { 
				                    case VK_ESCAPE: 
					                PostMessage(hWnd, WM_CLOSE, 0, 0); 
				                    break; 
			                    } 
		                        break; 
 
		case WM_DESTROY:		FiniApp();			// destroy all objects 
								PostQuitMessage(0); // terminate program 
		                        break; 
	} 
 
	return DefWindowProc(hWnd, message, wParam, lParam); 
} 
 
 
 
///////////////////////////////////////////////////////////////////////////////////////////// 
// InitApp - Create the window and the CDX objects 
///////////////////////////////////////////////////////////////////////////////////////////// 
BOOL InitApp(HINSTANCE hInst, int nCmdShow) 
{ 
	HWND hWnd; 
	WNDCLASS WndClass; 
 
	WndClass.style = CS_HREDRAW | CS_VREDRAW; 
	WndClass.lpfnWndProc = WinProc; 
	WndClass.cbClsExtra = 0; 
	WndClass.cbWndExtra = 0; 
	WndClass.hInstance = hInst; 
	WndClass.hIcon = LoadIcon(0, IDI_APPLICATION); 
	WndClass.hCursor = LoadCursor(0, IDC_ARROW); 
	WndClass.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH); 
	WndClass.lpszMenuName = 0; 
	WndClass.lpszClassName = NAME; 
	RegisterClass(&WndClass); 
 
    // create the main window 
	hWnd = CreateWindowEx( 
		WS_EX_TOPMOST, 
		NAME, 
		TITLE, 
		WS_POPUP, 
		0,0, 
		GetSystemMetrics(SM_CXSCREEN), 
		GetSystemMetrics(SM_CYSCREEN), 
		NULL, 
		NULL, 
		hInst, 
		NULL); 
 
    // when hWnd = -1 there was an error creating the main window 
    // CDXError needs a CDXScreen object, if there is none at this early 
    // program stage, pass it NULL 
	if(!hWnd)  
        CDXError( NULL , "could not create the main window" ); 
 
    // show the main window 
	ShowWindow(hWnd, nCmdShow); 
	UpdateWindow(hWnd); 
 
	// Create the CDXSreen object 
	Screen = new CDXScreen(); 
 
    // This is a special case because some graphics cards support 16bit, other 15bit 
    // so we have to check this 
    // check if the 16bit mode exists 
    if( Screen->CheckIfVideoModeExists( 640 , 480 , 16 ) == FALSE ) 
    {   // no, set 15 bit mode and display ewrror if it fails 
        if( FAILED(Screen->CreateFullScreen( hWnd , 640 , 480 , 15 ))) 
            CDXError( Screen , "could not set video mode 640x480x15" ); 
    } 
    else 
    {   // yes, set 16 bit mode and display error if it fails 
        if( FAILED(Screen->CreateFullScreen( hWnd , 640 , 480 , 16 ))) 
            CDXError( Screen , "could not set video mode 640x480x16" ); 
    } 
 
	// Load the tiles 
    Tiles = new CDXTile(); 
    if( Tiles->Create( Screen , Bitmap , 64 , 64 , 0 ) == FALSE ) 
        CDXError( Screen , "could not load tiles from file TILES.BMP" ); 
 
	// Create and load the map 
	Map = new CDXMap(Tiles, Screen); 
	Map->Create(512, 512, 1); 
	Map->MoveTo(0,0); 
 
	Map->EnableScrollWrapping(TRUE); 
 
	// Create input devices 
    Input = new CDXInput(); 
	if( FAILED(Input->Create( hInst , hWnd ))) 
		CDXError( Screen , "could not create direct input object" ); 
 
	return TRUE; 
} 
 
 
 
// ------------------------------------------------------------------------------------------ 
// WinMain 
// ------------------------------------------------------------------------------------------ 
int PASCAL WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, LPSTR lpCmdLine, int nCmdShow) 
{ 
	MSG     msg; 
	LONG    JoyX , JoyY; 
 
	if(!InitApp(hInst, nCmdShow)) 
        CDXError( NULL , "could not initialize CDX application" ); 
 
 
	while(1) 
	{ 
		if(PeekMessage(&msg, NULL, 0, 0, PM_NOREMOVE)) 
		{ 
			if(!GetMessage(&msg, NULL, 0, 0 )) return msg.wParam; 
			TranslateMessage(&msg);  
			DispatchMessage(&msg); 
		} 
		else if(bActive)                            // if application has the focus, process 
		{ 
			Input->Update();                        // Refresh the input devices 
			Input->GetJoystickPos( &JoyX , &JoyY ); // get joystick position 
 
            // check how far the joystick moved and move the map corresponding 
			if(JoyY < 0 || Input->GetKeyState(CDXKEY_UPARROW)) Map->ScrollUp(1); 
			if(JoyY > 0 || Input->GetKeyState(CDXKEY_DOWNARROW)) Map->ScrollDown(1); 
			if(JoyX < 0 || Input->GetKeyState(CDXKEY_LEFTARROW)) Map->ScrollLeft(1); 
			if(JoyX > 0 || Input->GetKeyState(CDXKEY_RIGHTARROW)) Map->ScrollRight(1); 
 
			Map->DrawClipped(Screen->GetBack(), &Window);   // Draw the map to the back buffer 
			Screen->Flip();                                 // Then display it 
		} 
		else WaitMessage(); 
	} 
}