ddex1.cpp

Windows Mobile 6 DDraw1案例

//
// Copyright (c) Microsoft Corporation.  All rights reserved.
//
//
// Use of this sample source code is subject to the terms of the Microsoft
// license agreement under which you licensed this sample source code. If
// you did not accept the terms of the license agreement, you are not
// authorized to use this sample source code. For the terms of the license,
// please see the license agreement between you and Microsoft or, if applicable,
// see the LICENSE.RTF on your install media or the root of your tools installation.
// THE SAMPLE SOURCE CODE IS PROVIDED "AS IS", WITH NO WARRANTIES OR INDEMNITIES.
//
//-----------------------------------------------------------------------------
// File: DDEx1.CPP
//
// Desc: Direct Draw example program 1.  Creates a Direct Draw 
//       object and then a primary surface with a back buffer.
//       Slowly flips between the primary surface and the back
//       buffer.  Press F12 to terminate the program.
//
//-----------------------------------------------------------------------------

#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN
#endif
//-----------------------------------------------------------------------------
// Include files
//-----------------------------------------------------------------------------
#include <windows.h>
#include <ddraw.h>
#include "resource.h"
#include "winuserm.h"

//-----------------------------------------------------------------------------
// Local definitions
//-----------------------------------------------------------------------------
#define NAME                TEXT("DDExample1")
#define TITLE               TEXT("Direct Draw Example 1")

//-----------------------------------------------------------------------------
// Default settings
//-----------------------------------------------------------------------------
#define TIMER_ID            1
#define TIMER_RATE          500

//-----------------------------------------------------------------------------
// Global data
//-----------------------------------------------------------------------------
LPDIRECTDRAW                g_pDD = NULL;            // DirectDraw object
LPDIRECTDRAWSURFACE         g_pDDSPrimary = NULL;    // DirectDraw primary surface
LPDIRECTDRAWSURFACE         g_pDDSBack = NULL;       // DirectDraw back surface
BOOL                        g_bActive = FALSE;       // Is application active?
LPCTSTR                     g_szErrorMessage = NULL; // Error message to display.

//-----------------------------------------------------------------------------
// Local data
//-----------------------------------------------------------------------------
static const TCHAR          szMsg[] = TEXT("Page Flipping Test: Press F12 to exit");
static const TCHAR          szFrontMsg[] = TEXT("Front buffer (F12 to quit)");
static const TCHAR          szBackMsg[] = TEXT("Back buffer (F12 to quit)");
static const TCHAR          szDDrawError[] = TEXT("DirectDraw Error");
static const TCHAR          szDDrawFailedMsg[] = TEXT("DirectDrawCreate failed.");
static const TCHAR          szSetCooperativeFailMsg[] = TEXT("SetCooperativeLevel failed.");
static const TCHAR          szNoBackBufferMsg[] = TEXT("Display driver doesn't support a back buffer.");
static const TCHAR          szNoFlipSurfacesMsg[] =TEXT("Display driver doesn't support flipping surfaces.");
static const TCHAR          szEnumAttachedSurfacesFailMsg[] = TEXT("EnumAttachedSurfaces failed.");
static const TCHAR          szCreateSurfaceFailMsg[] = TEXT("CreateSurface failed.");
static const TCHAR          szSetTimerFailMsg[] = TEXT("SetTimer failed.");

//-----------------------------------------------------------------------------
// Name: ReleaseAllObjects()
// Desc: Finished with all objects we use; release them
//-----------------------------------------------------------------------------
static void
ReleaseAllObjects(void)
{
    if (g_pDDSBack != NULL)
    {
        g_pDDSBack->Release();
        g_pDDSBack = NULL;
    }
    if (g_pDDSPrimary != NULL)
    {
        g_pDDSPrimary->Release();
        g_pDDSPrimary = NULL;
    }
    if (g_pDD != NULL)
    {
        g_pDD->Release();
        g_pDD = NULL;
    }
}

//-----------------------------------------------------------------------------
// Name: InitFail()
// Desc: This function is called if an initialization function fails
//-----------------------------------------------------------------------------
HRESULT
InitFail(HWND hWnd, HRESULT hRet, LPCTSTR szError,...)
{
    ReleaseAllObjects();
    DestroyWindow(hWnd);
    g_szErrorMessage = szError;
    return hRet;
}

//-----------------------------------------------------------------------------
// Name: UpdateFrame()
// Desc: Displays the proper text for the page
//-----------------------------------------------------------------------------
static void
UpdateFrame(HWND hWnd)
{
    static BYTE phase = 0;
    HDC hdc;
    RECT rc;
    SIZE size;
    int nMsg;
    DDBLTFX ddbltfx;

    // Use the blter to do a color fill to clear the back buffer
    memset(&ddbltfx, 0, sizeof(ddbltfx));
    ddbltfx.dwSize = sizeof(ddbltfx);
    ddbltfx.dwFillColor = 0;
    g_pDDSBack->Blt(NULL, NULL, NULL, DDBLT_COLORFILL | DDBLT_WAITNOTBUSY, &ddbltfx);

    if (g_pDDSBack->GetDC(&hdc) == DD_OK)
    {
        SetBkColor(hdc, RGB(0, 0, 255));
        SetTextColor(hdc, RGB(255, 255, 0));
        GetClientRect(hWnd, &rc);
        if (phase)
        {
            nMsg = lstrlen(szMsg);
            GetTextExtentPoint(hdc, szMsg, nMsg, &size);
            ExtTextOut(hdc, 
               (rc.right - size.cx) / 2, 
               (rc.bottom - size.cy) / 2,
               0,                        // fuOptions
               NULL,                     // lprc
               szMsg, 
               nMsg,
               NULL);                    // lpDx

            nMsg = lstrlen(szFrontMsg);
            GetTextExtentPoint(hdc, szFrontMsg, nMsg, &size);
            ExtTextOut(hdc, 
               (rc.right - size.cx) / 2, // Center horz. for tv reasons
               0, 
               0,                        // fuOptions
               NULL,                     // lprc
               szFrontMsg, 
               nMsg,
               NULL);                    // lpDx
            phase = 0;
        }
        else
        {
            nMsg = lstrlen(szBackMsg);
            GetTextExtentPoint(hdc, szBackMsg, nMsg, &size);
            ExtTextOut(hdc, 
               (rc.right - size.cx) / 2, // Center horz. for tv reasons 
               0,  
               0,                        // fuOptions
               NULL,                     // lprc
               szBackMsg, 
               nMsg,
               NULL);                    // lpDx
            phase = 1;
        }
        g_pDDSBack->ReleaseDC(hdc);
    }
}




//-----------------------------------------------------------------------------
// Name: WindowProc()
// Desc: The Main Window Procedure
//-----------------------------------------------------------------------------
long FAR PASCAL
WindowProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    HRESULT                     hRet;

    switch (message)
    {
#ifdef UNDER_CE
        case WM_ACTIVATE:
#else
        case WM_ACTIVATEAPP:
#endif
            // Pause if minimized or not the top window
            g_bActive = (wParam == WA_ACTIVE) || (wParam == WA_CLICKACTIVE);
            return 0L;

        case WM_DESTROY:
            // Clean up and close the app
            ReleaseAllObjects();
            PostQuitMessage(0);
            return 0L;

        case WM_KEYDOWN:
            // Handle any non-accelerated key commands
            switch (wParam)
            {
                case VK_ACTION:
                    PostMessage(hWnd, WM_CLOSE, 0, 0);
                    return 0L;
            }
            break;

        case WM_SETCURSOR:
            // Turn off the cursor since this is a full-screen app
            SetCursor(NULL);
            return TRUE;

        case WM_TIMER:
            // Update and flip surfaces
            if (g_bActive && TIMER_ID == wParam)
            {
                UpdateFrame(hWnd);
                while (TRUE)
                {
                    hRet = g_pDDSPrimary->Flip(NULL, 0);
                    if (hRet == DD_OK)
                        break;
                    if (hRet == DDERR_SURFACELOST)
                    {
                        hRet = g_pDDSPrimary->Restore();
                        if (hRet != DD_OK)
                            break;
                    }
                    if (hRet != DDERR_WASSTILLDRAWING)
                        break;
                }
            }
            break;
    }
    return DefWindowProc(hWnd, message, wParam, lParam);
}

//-----------------------------------------------------------------------------
// Name: EnumFunction()
// Desc: Enumeration callback for surfaces in flipping chain. We expect this
//          function to be called once with the surface interface pointer of
//          our back buffer (we only ask for a single back buffer.)
//-----------------------------------------------------------------------------
static HRESULT PASCAL
EnumFunction(LPDIRECTDRAWSURFACE pSurface,
             LPDDSURFACEDESC lpSurfaceDesc,
             LPVOID  lpContext)
{
    static BOOL bCalled = FALSE;

    if (!bCalled) {

        *((LPDIRECTDRAWSURFACE *)lpContext) = pSurface;
        bCalled = TRUE;
        return DDENUMRET_OK;
    }
    else {

        OutputDebugString(L"DDEX1: Enumerated more than surface?");
        pSurface->Release();
        return DDENUMRET_CANCEL;
    }
}

//-----------------------------------------------------------------------------
// Name: InitApp()
// Desc: Do work required for every instance of the application:
//          Create the window, initialize data
//-----------------------------------------------------------------------------
static HRESULT
InitApp(HINSTANCE hInstance, int nCmdShow)
{
    HWND                        hWnd;
    WNDCLASS                    wc;
    DDSURFACEDESC               ddsd;
    HRESULT                     hRet;

    // Set up and register window class
    wc.style = CS_HREDRAW | CS_VREDRAW;
    wc.lpfnWndProc = WindowProc;
    wc.cbClsExtra = 0;
    wc.cbWndExtra = 0;
    wc.hInstance = hInstance;
    wc.hIcon = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_MAIN_ICON));
    wc.hCursor = LoadCursor(NULL, IDC_ARROW);
    wc.hbrBackground = (HBRUSH )GetStockObject(BLACK_BRUSH);
    wc.lpszMenuName = NULL;
    wc.lpszClassName = NAME;
    RegisterClass(&wc);

    // Create a window
    hWnd = CreateWindowEx(WS_EX_TOPMOST,
                          NAME,
                          TITLE,
                          WS_POPUP,
                          0,
                          0,
                          GetSystemMetrics(SM_CXSCREEN),
                          GetSystemMetrics(SM_CYSCREEN),
                          NULL,
                          NULL,
                          hInstance,
                          NULL);
    if (!hWnd)
        return FALSE;
    ShowWindow(hWnd, nCmdShow);
    UpdateWindow(hWnd);
    SetFocus(hWnd);

    ///////////////////////////////////////////////////////////////////////////
    // Create the main DirectDraw object
    ///////////////////////////////////////////////////////////////////////////
    

    hRet = DirectDrawCreate(NULL, &g_pDD, NULL);
    if (hRet != DD_OK)
        return InitFail(hWnd, hRet, szDDrawFailedMsg);

    // Get exclusive mode
    hRet = g_pDD->SetCooperativeLevel(hWnd, DDSCL_FULLSCREEN);
    if (hRet != DD_OK)
        return InitFail(hWnd, hRet, szSetCooperativeFailMsg);

    DDCAPS ddCaps;
    DDCAPS ddHelCaps;

    g_pDD->GetCaps(&ddCaps, &ddHelCaps);

	if (!(ddCaps.ddsCaps.dwCaps & DDSCAPS_BACKBUFFER)) 
    {
        return InitFail(hWnd, E_FAIL, szNoBackBufferMsg);
    }

    if (!(ddCaps.ddsCaps.dwCaps & DDSCAPS_FLIP)) 
    {
        return InitFail(hWnd, E_FAIL, szNoFlipSurfacesMsg);
    }

    // Create the primary surface with 1 back buffer
    memset(&ddsd, 0, sizeof(ddsd));
    ddsd.dwSize = sizeof(ddsd);
    ddsd.dwFlags = DDSD_CAPS | DDSD_BACKBUFFERCOUNT;
    ddsd.ddsCaps.dwCaps = DDSCAPS_PRIMARYSURFACE |
                          DDSCAPS_FLIP;
    ddsd.dwBackBufferCount = 1;
    hRet = g_pDD->CreateSurface(&ddsd, &g_pDDSPrimary, NULL);
    if (hRet != DD_OK)
    {
        return InitFail(hWnd, hRet, szCreateSurfaceFailMsg);
    }

    // Get a pointer to the back buffer
    hRet = g_pDDSPrimary->EnumAttachedSurfaces(&g_pDDSBack, EnumFunction);
   if (hRet != DD_OK)
        return InitFail(hWnd, hRet, szEnumAttachedSurfacesFailMsg);

    // Create a timer to flip the pages
    if (TIMER_ID != SetTimer(hWnd, TIMER_ID, TIMER_RATE, NULL))
        return InitFail(hWnd, hRet, szSetTimerFailMsg);

    return DD_OK;
}




//-----------------------------------------------------------------------------
// Name: WinMain()
// Desc: Initialization, message loop
//-----------------------------------------------------------------------------
int PASCAL
WinMain(HINSTANCE hInstance,
        HINSTANCE hPrevInstance,
        LPWSTR lpCmdLine,
        int nCmdShow)
{
    MSG        msg;

    InitApp(hInstance, nCmdShow);

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

    if (g_szErrorMessage != NULL){
        MessageBox(NULL, g_szErrorMessage, szDDrawError, MB_OK | MB_ICONEXCLAMATION);
        return FALSE;
    }

    return msg.wParam;
}