DDEX3.CPP
资源名称:MSDN_VC98.zip [点击查看]
上传用户:bangxh
上传日期:2007-01-31
资源大小:42235k
文件大小:9k
源码类别:
Windows编程
开发平台:
Visual C++
- /*==========================================================================
- *
- * Copyright (C) 1995-1997 Microsoft Corporation. All Rights Reserved.
- *
- * File: ddex3.cpp
- * Content: Direct Draw example program 3. Adds functionality to
- * example program 2. Creates two offscreen surfaces in
- * addition to the primary surface and back buffer. Loads
- * a bitmap file into each offscreen surface. Uses BltFast
- * to copy the contents of an offscreen surface to the back
- * buffer and then flips the buffers and copies the next
- * offscreen surface to the back buffer. Press F12 to exit
- * the program. This program requires at least 1.2 Megs of
- * video ram.
- *
- ***************************************************************************/
- #define NAME "DDExample3"
- #define TITLE "Direct Draw Example 3"
- #define WIN32_LEAN_AND_MEAN
- #include <windows.h>
- #include <windowsx.h>
- #include <ddraw.h>
- #include <stdlib.h>
- #include <stdarg.h>
- #include "resource.h"
- #include "ddutil.h" // DDLoadPalette, DDCopyBitmap
- // Name of our bitmap resource.
- char szBitmap[] = "DDEX3";
- BOOL InitSurfaces( void );
- #define TIMER_ID 1
- #define TIMER_RATE 500
- LPDIRECTDRAW lpDD; // DirectDraw object
- LPDIRECTDRAWSURFACE lpDDSPrimary; // DirectDraw primary surface
- LPDIRECTDRAWSURFACE lpDDSBack; // DirectDraw back surface
- LPDIRECTDRAWSURFACE lpDDSOne; // Offscreen surface 1
- LPDIRECTDRAWSURFACE lpDDSTwo; // Offscreen surface 2
- LPDIRECTDRAWPALETTE lpDDPal; // DirectDraw palette
- BOOL bActive; // is application active?
- /*
- * finiObjects
- *
- * finished with all objects we use; release them
- */
- static void finiObjects( void )
- {
- if( lpDD != NULL )
- {
- if( lpDDSPrimary != NULL )
- {
- lpDDSPrimary->Release();
- lpDDSPrimary = NULL;
- }
- if( lpDDSOne != NULL )
- {
- lpDDSOne->Release();
- lpDDSOne = NULL;
- }
- if( lpDDSTwo != NULL )
- {
- lpDDSTwo->Release();
- lpDDSTwo = NULL;
- }
- if( lpDDPal != NULL )
- {
- lpDDPal->Release();
- lpDDPal = NULL;
- }
- lpDD->Release();
- lpDD = NULL;
- }
- } /* finiObjects */
- /*
- * restoreAll
- *
- * restore all lost objects
- */
- HRESULT restoreAll( void )
- {
- HRESULT ddrval;
- ddrval = lpDDSPrimary->Restore();
- if( ddrval == DD_OK )
- {
- ddrval = lpDDSOne->Restore();
- if( ddrval == DD_OK )
- {
- ddrval = lpDDSTwo->Restore();
- if( ddrval == DD_OK )
- {
- InitSurfaces();
- }
- }
- }
- return ddrval;
- } /* restoreAll */
- long FAR PASCAL WindowProc( HWND hWnd, UINT message,
- WPARAM wParam, LPARAM lParam )
- {
- static int phase = 0;
- RECT rcRect;
- switch( message )
- {
- case WM_ACTIVATEAPP:
- bActive = wParam;
- break;
- case WM_CREATE:
- break;
- case WM_SETCURSOR:
- SetCursor(NULL);
- return TRUE;
- case WM_TIMER:
- if( bActive )
- {
- HRESULT ddrval;
- LPDIRECTDRAWSURFACE pdds;
- rcRect.left = 0;
- rcRect.top = 0;
- rcRect.right = 640;
- rcRect.bottom = 480;
- if(phase)
- {
- pdds = lpDDSTwo;
- phase = 0;
- }
- else
- {
- pdds = lpDDSOne;
- phase = 1;
- }
- while( 1 )
- {
- ddrval = lpDDSBack->BltFast( 0, 0, pdds, &rcRect, FALSE );
- if( ddrval == DD_OK )
- {
- break;
- }
- if( ddrval == DDERR_SURFACELOST )
- {
- ddrval = restoreAll();
- if( ddrval != DD_OK )
- {
- break;
- }
- }
- if( ddrval != DDERR_WASSTILLDRAWING )
- {
- break;
- }
- }
- // Flip surfaces
- while( 1 )
- {
- ddrval = lpDDSPrimary->Flip( NULL, 0 );
- if( ddrval == DD_OK )
- {
- break;
- }
- if( ddrval == DDERR_SURFACELOST )
- {
- ddrval = restoreAll();
- if( ddrval != DD_OK )
- {
- break;
- }
- }
- if( ddrval != DDERR_WASSTILLDRAWING )
- {
- break;
- }
- }
- }
- break;
- case WM_KEYDOWN:
- switch( wParam )
- {
- case VK_ESCAPE:
- case VK_F12:
- PostMessage(hWnd, WM_CLOSE, 0, 0);
- break;
- }
- break;
- case WM_DESTROY:
- finiObjects();
- PostQuitMessage( 0 );
- break;
- }
- return DefWindowProc(hWnd, message, wParam, lParam);
- } /* WindowProc */
- /*
- * This function is called if the initialization function fails
- */
- BOOL initFail( HWND hwnd )
- {
- finiObjects();
- MessageBox( hwnd, "DirectDraw Init FAILED", TITLE, MB_OK );
- DestroyWindow( hwnd );
- return FALSE;
- } /* initFail */
- /*
- * doInit - do work required for every instance of the application:
- * create the window, initialize data
- */
- static BOOL doInit( HINSTANCE hInstance, int nCmdShow )
- {
- HWND hwnd;
- WNDCLASS wc;
- DDSURFACEDESC ddsd;
- DDSCAPS ddscaps;
- HRESULT ddrval;
- /*
- * 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, IDI_APPLICATION );
- wc.hCursor = LoadCursor( NULL, IDC_ARROW );
- wc.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH);
- wc.lpszMenuName = NAME;
- wc.lpszClassName = NAME;
- RegisterClass( &wc );
- /*
- * create a window
- */
- hwnd = CreateWindowEx(
- 0,
- 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 );
- /*
- * create the main DirectDraw object
- */
- ddrval = DirectDrawCreate( NULL, &lpDD, NULL );
- if( ddrval != DD_OK )
- {
- return initFail(hwnd);
- }
- // Get exclusive mode
- ddrval = lpDD->SetCooperativeLevel( hwnd, DDSCL_EXCLUSIVE | DDSCL_FULLSCREEN );
- if( ddrval != DD_OK )
- {
- return initFail(hwnd);
- }
- // Set the video mode to 640x480x8
- ddrval = lpDD->SetDisplayMode( 640, 480, 8);
- if( ddrval != DD_OK )
- {
- return initFail(hwnd);
- }
- // Create the primary surface with 1 back buffer
- ddsd.dwSize = sizeof( ddsd );
- ddsd.dwFlags = DDSD_CAPS | DDSD_BACKBUFFERCOUNT;
- ddsd.ddsCaps.dwCaps = DDSCAPS_PRIMARYSURFACE |
- DDSCAPS_FLIP |
- DDSCAPS_COMPLEX;
- ddsd.dwBackBufferCount = 1;
- ddrval = lpDD->CreateSurface( &ddsd, &lpDDSPrimary, NULL );
- if( ddrval != DD_OK )
- {
- return initFail(hwnd);
- }
- ddscaps.dwCaps = DDSCAPS_BACKBUFFER;
- ddrval = lpDDSPrimary->GetAttachedSurface(&ddscaps, &lpDDSBack);
- if( ddrval != DD_OK )
- {
- return initFail(hwnd);
- }
- // Create a offscreen bitmap.
- ddsd.dwFlags = DDSD_CAPS | DDSD_HEIGHT | DDSD_WIDTH;
- ddsd.ddsCaps.dwCaps = DDSCAPS_OFFSCREENPLAIN;
- ddsd.dwHeight = 480;
- ddsd.dwWidth = 640;
- ddrval = lpDD->CreateSurface( &ddsd, &lpDDSOne, NULL );
- if( ddrval != DD_OK )
- {
- return initFail(hwnd);
- }
- // Create another offscreen bitmap.
- ddrval = lpDD->CreateSurface( &ddsd, &lpDDSTwo, NULL );
- if( ddrval != DD_OK )
- {
- return initFail(hwnd);
- }
- // Create a Direct Draw Palette and associate it with the front buffer
- lpDDPal = DDLoadPalette(lpDD, szBitmap);
- if (lpDDPal)
- lpDDSPrimary->SetPalette( lpDDPal );
- if( !InitSurfaces() )
- {
- return initFail(hwnd);
- }
- // Create a timer to flip the pages
- if( !SetTimer( hwnd, TIMER_ID, TIMER_RATE, NULL ) )
- {
- return initFail(hwnd);
- }
- return TRUE;
- } /* doInit */
- /*
- * WinMain - initialization, message loop
- */
- int PASCAL WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance,
- LPSTR lpCmdLine, int nCmdShow)
- {
- MSG msg;
- lpCmdLine = lpCmdLine;
- hPrevInstance = hPrevInstance;
- if( !doInit( hInstance, nCmdShow ) )
- {
- return FALSE;
- }
- while( GetMessage( &msg, NULL, 0, 0 ) )
- {
- TranslateMessage(&msg);
- DispatchMessage(&msg);
- }
- return msg.wParam;
- } /* WinMain */
- /*
- * InitSurfaces - This function reads the bitmap file FRNTBACK.BMP
- * and stores half of it in offscreen surface 1 and the other half in
- * offscreen surface 2.
- */
- BOOL InitSurfaces( void )
- {
- HBITMAP hbm;
- // Load our bitmap resource.
- hbm = (HBITMAP)LoadImage(GetModuleHandle(NULL), szBitmap, IMAGE_BITMAP, 0, 0, LR_CREATEDIBSECTION);
- if (hbm == NULL)
- return FALSE;
- DDCopyBitmap(lpDDSOne, hbm, 0, 0, 640, 480);
- DDCopyBitmap(lpDDSTwo, hbm, 0, 480, 640, 480);
- DeleteObject(hbm);
- return TRUE;
- } /* readBMPIntoSurfaces */