Sourcecodes - Das erste Direct3D Programm

Code:


// Headerdatei
#include <windows.h>
#include <d3d9.h>
#include <d3dx9.h>

HWND hWnd = 0;

// Anwendungsfenster erzeugen
HWND CreateMainWindow(HINSTANCE hInstance);

// Callback Funktion zur Nachrichtenbehandlung
LRESULT CALLBACK MessageHandler(HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam);

LPDIRECT3D9 g_pD3D =NULL;
LPDIRECT3DDEVICE9 pDevice = NULL;

// Windows main-Funktion
int WINAPI WinMain(HINSTANCE hInstance,      // Handle der Programminstanz
                   HINSTANCE hPrevInstance,  // Handle der letzten Instanz
                   LPSTR lpCmdLine,          // Kommandozeile
                   int nCmdShow)             // Art wie das Fenster angezeigt werden soll
{   
    hWnd = CreateMainWindow(hInstance);

    if(0 == hWnd)
    {
        MessageBox(0,"Fenster konnte nicht erzeugt werden","Fehler",MB_OK);
        return 0;
    }

    // Struktur, in der Informationen zur Nachricht gespeichert werden
    MSG msg;
    
    if(!(g_pD3D =Direct3DCreate9(D3D_SDK_VERSION)))
    {
        MessageBox(0,"Fehler beim erzeugen eines D3D Objekts","Fehler beim Initialisieren von Direct3D",MB_OK);
    }

     D3DPRESENT_PARAMETERS PParams;
    ZeroMemory(&PParams,sizeof(PParams));

    PParams.SwapEffect=D3DSWAPEFFECT_DISCARD;
    PParams.hDeviceWindow=hWnd;
    PParams.Windowed =FALSE;

    PParams.BackBufferWidth=800;
    PParams.BackBufferHeight=600;

    PParams.BackBufferFormat = D3DFMT_X8R8G8B8;
    PParams.Flags            = D3DPRESENTFLAG_LOCKABLE_BACKBUFFER;

    if(FAILED(g_pD3D ->CreateDevice(D3DADAPTER_DEFAULT,D3DDEVTYPE_HAL,
                hWnd,D3DCREATE_SOFTWARE_VERTEXPROCESSING,&PParams,& pDevice)))
    {
        MessageBox(hWnd,"Fehler beim anlegen des Geräts","Fehler beim Initialisieren von Direct3D",MB_OK);
    }

    while(GetMessage(&msg,NULL,0,0))
    {
         TranslateMessage(&msg);
        DispatchMessage(&msg);
    }

    if(NULL !=g_pD3D)
    {
        g_pD3D->Release();
        g_pD3D=NULL;
    }

    if(NULL !=pDevice)
    {
        pDevice->Release();
        pDevice=NULL;
    }

    return 0;
}

// Fenster erzeugen
HWND CreateMainWindow(HINSTANCE hInstance)
{
    WNDCLASSEX wndClass = 
    { 
        sizeof(WNDCLASSEX),                                 // Größe angeben
        CS_DBLCLKS | CS_OWNDC | CS_HREDRAW | CS_VREDRAW,    // Standardstile        
        MessageHandler,                                     // Callback-Funktion
        0,                                                  // Zusätzliche Angaben
        0,                                                  // nicht benötigt
        hInstance,                                          // Anwendungsinstanz
        LoadIcon(NULL, IDI_WINLOGO),                        // Windows-Logo
        LoadCursor(NULL, IDC_ARROW),                        // Normaler Cursor
        (HBRUSH)GetStockObject(WHITE_BRUSH),                // Weißer Pinsel
        NULL,                                               // kein Menü
        "WindowClass",                                      // Der Name der Klasse
        LoadIcon(NULL, IDI_WINLOGO)                         // Windows Logo
    };


    RegisterClassEx(&wndClass);

    return CreateWindowEx(NULL,                   // Keine erweiterten Stile nutzen
                          "WindowClass",          // Klassenname
                          "Hello Windows",        // Fenstertitel
                          WS_OVERLAPPEDWINDOW |   // Fenster
                          WS_VISIBLE,             // Eigenschaften
                          100, 100, 400, 300,     // Anfangsposition und Größe
                          NULL,                   // Handle des Elternfensters
                          NULL,                   // Handle des Menüs
                          hInstance,              // Anwendungsinstanz
                          NULL);                  // wird nicht benötigt
}


LRESULT CALLBACK MessageHandler(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
    switch(msg)
    {
        case WM_DESTROY:
                    PostQuitMessage(0);
                    return 0;
                break;   
        case WM_PAINT:

                pDevice->Clear(0,0,D3DCLEAR_TARGET,D3DCOLOR_XRGB(0,0,0xFF),0,0);
                pDevice->BeginScene();

                LPDIRECT3DSURFACE9 lpBackBuffer;
                HDC hDC;

                pDevice->GetBackBuffer(0,0, D3DBACKBUFFER_TYPE_MONO,&lpBackBuffer);

                if(FAILED(lpBackBuffer->GetDC(&hDC)))
                {
                    MessageBox(hwnd,"Fehler","Fehler beim Abfragen von DC handle",MB_OK);
                }

                TextOut(hDC,10,30,"Hallo Direct3D",14);
                    
                lpBackBuffer->ReleaseDC(hDC);


                pDevice->EndScene();
                pDevice->Present(0,0,0,0);
            return 0;
        break;
    }

    return DefWindowProc(hwnd, msg, wParam, lParam);
}