属于Win32程序的基本框架的我们用蓝色标出,而用红色表出的是我们要重点学习的。下面的所有程序都是 FullScreenMode.cpp 文件中的内容,其中“IDB_DIRECTX”和“IDB_WinXP”都是图片资源的ID号,我想如何向程序中添加资源应该不用我多说了吧:)
工程文件:FullScreenMode.cpp
#define STRICT
#include
#include
#include
#include "resource.h"
#include "ddutil.h"
//定义删除指针和释放对象的宏
#define SAFE_DELETE(p)
{
if(p)
{
delete (p);
(p)=NULL;
}
}
#define SAFE_RELEASE(p)
{
if(p)
{
(p)-Release();
(p)=NULL;
}
}
#define SCREEN_WIDTH 1024 //定义屏幕宽度
#define SCREEN_HEIGHT 768 //定义屏幕高度
#define SCREEN_BPP 8 //定义调色板位数
#define SPRITE_DIAMETER 32 //定义飘动的子画面 的直径(宽度和高度一样)
#define NUM_SPRITES 10 //定义飘动的子画面 的个数
#define HELPTEXT TEXT("Press Escape to quit.") //定义文本住表面
上面出现的这个 TEXT( ) 是一个系统头文件里定义的宏,起作用是检查程序中是否定义了 Unicode ,如果有,就将括号中的文本转化成宽自负,如果没有,则转化成ASCLL 码。以下定义的是子画面飘动时的属性:
struct SPRITE_STRUCT
{
FLOAT fPosX; //sprite当前坐标的x值,如果在初始化时,即为初始坐标x值
FLOAT fPosY; //sprite当前坐标的y值,如果在初始化时,即为初始坐标y值
FLOAT fVelX; //sprite在x轴上的速度
FLOAT fVelY; //sprite在y轴上的速度
};
CDisplay* g_pDisplay = NULL; /*CDisplay就是ddutil.h(我们又新加入的目录中的)中定义的类,用于处理表面之间的拷贝翻页等操作的类,再次定义一个全局变量,用于以后对指向的表面之间进行操作*/
CSurface* g_pBackSurface = NULL; /* CSurface也是ddutil.h头文件中定义的类,用于对表面本身进行操作,如设置色彩键码,在此定义的是背景图画指针*/
CSurface* g_pLogoSurface = NULL; /*子画面图画指针*/
CSurface* g_pTextSurface = NULL; /*背景文本指针*/
BOOL g_bActive = FALSE; /*定义一个bool形变量,起到一个开关的作用,对程序流程进行控制*/
DWORD g_dwLastTick; /*用于记录最后一次的系统时间*/
SPRITE_STRUCT g_Sprite[NUM_SPRITES]; /*定义多个子画面,其中包括多个 运动时的属性*/
Function-prototypes
LRESULT CALLBACK MainWndProc( HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam );//主窗口消息处理函数
HRESULT WinInit( HINSTANCE hInst, int nCmdShow, HWND* phWnd, HACCEL* phAccel );//窗口类设置,注册,并创建窗口
HRESULT InitDirectDraw( HWND hWnd );
VOID FreeDirectDraw();
HRESULT ProcessNextFrame();
VOID UpdateSprite( SPRITE_STRUCT* pSprite, FLOAT fTimeDelta );
HRESULT DisplayFrame();
HRESULT RestoreSurfaces();
WinMain()
Desc: Entry point to the program. Initializes everything and calls
UpdateFrame() when idle from the message pump.
int APIENTRY WinMain( HINSTANCE hInst, HINSTANCE hPrevInst, LPSTR pCmdLine, int nCmdShow )
{
MSG msg;
HWND hWnd;
HACCEL hAccel;
ZeroMemory( &g_Sprite, sizeof(SPRITE_STRUCT) * NUM_SPRITES );//清空内存
srand( GetTickCount() /*用于获取自windows启动以来经历的时间长度(毫秒)*/ ); //设置随机数随时间变化而变化
if( FAILED( WinInit( hInst, nCmdShow, &hWnd, &hAccel ) ) )
return FALSE;
if( FAILED( InitDirectDraw( hWnd ) ) )
{
MessageBox( hWnd, TEXT("DirectDraw init failed. ")
TEXT("The sample will now exit. "), TEXT("DirectDraw Sample"),
MB_ICONERROR | MB_OK );
return FALSE;
}
g_dwLastTick = timeGetTime();//获得当前系统时间
while( TRUE )
{
// Look for messages, if none are found then
// update the state and display it
if( PeekMessage( &msg, NULL, 0, 0, PM_NOREMOVE ) )
{
if( 0 == GetMessage(&msg, NULL, 0, 0 ) )
{
// WM_QUIT was posted, so exit
return (int)msg.wParam;
}
// Translate and dispatch the message
if( 0 == TranslateAccelerator( hWnd, hAccel, &msg ) )
{
TranslateMessage( &msg );
DispatchMessage( &msg );
}
}
else
{
if( g_bActive )
{
// Move the sprites, blt them to the back buffer, then
// flip or blt the back buffer to the primary buffer
if( FAILED( ProcessNextFrame() ) /*设置下张页面的子画面的位置*/)
{
SAFE_DELETE( g_pDisplay );
MessageBox( hWnd, TEXT("Displaying the next frame failed. ")
TEXT("The sample will now exit. "), TEXT("DirectDraw Sample"),
MB_ICONERROR | MB_OK );
return FALSE;
}
}
else
{
// Make sure we go to sleep if we have nothing else to do
WaitMessage();
// Ignore time spent inactive
g_dwLastTick = timeGetTime();//获得当前系统时间
}
}
}
}
WinInit()
Desc: Init the window
HRESULT WinInit( HINSTANCE hInst, int nCmdShow, HWND* phWnd, HACCEL* phAccel )
{
WNDCLASS wc;
HWND hWnd;
HACCEL hAccel;
// Register the Window Class 设置窗口类
wc.lpszClassName = TEXT("FullScreenMode");
wc.lpfnWndProc = MainWndProc;
wc.style = CS_VREDRAW | CS_HREDRAW;
wc.hInstance = hInst;
wc.hIcon = LoadIcon( hInst, MAKEINTRESOURCE(IDI_MAIN) );
wc.hCursor = LoadCursor( NULL, IDC_ARROW );
wc.hbrBackground = (HBRUSH) (COLOR_WINDOW + 1);
wc.lpszMenuName = NULL;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
if( RegisterClass( &wc ) == 0 /*注册窗口类*/ )
return E_FAIL;
// Load keyboard accelerators
hAccel = LoadAccelerators( hInst, MAKEINTRESOURCE(IDR_MAIN_ACCEL) );
// Create and show the main window
hWnd = CreateWindowEx( 0, TEXT("FullScreenMode"), TEXT("DirectDraw FullScreenMode Sample"),
WS_POPUP, CW_USEDEFAULT, CW_USEDEFAULT,
CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, hInst, NULL );
if( hWnd == NULL )
return E_FAIL;
ShowWindow( hWnd, nCmdShow );
UpdateWindow( hWnd );
*phWnd = hWnd;
*phAccel = hAccel;
return S_OK;
}
InitDirectDraw()
Desc: Create the DirectDraw object, and init the surfaces
HRESULT InitDirectDraw( HWND hWnd )
{
HRESULT hr; //接受返回值,其实是long型变量
LPDIRECTDRAWPALETTE pDDPal = NULL; //定义程序中的调色板
int iSprite; //定义与sprite个数有关的计数器
g_pDisplay = new CDisplay();//动态开辟一个CDisplay类
if( FAILED( hr = g_pDisplay-CreateFullScreenDisplay( hWnd, SCREEN_WIDTH, SCREEN_HEIGHT, SCREEN_BPP ) ) ) //设置程序为全屏,并且g_pDisplay就为后备缓冲区表面的句柄,即指向后备缓冲区表面的指针。
{
MessageBox( hWnd, TEXT("This display card does not support 1024x768x8. "),
TEXT("DirectDraw Sample"), MB_ICONERROR | MB_OK );
return hr;
}
// Create and set the palette when in palettized color
if( FAILED( hr = g_pDisplay-CreatePaletteFromBitmap( &pDDPal, MAKEINTRESOURCE( IDB_DIRECTX ) ) ) ) //顾名思义,就是从bmp图片中获得调色板值,并赋值在pDDPal结构指针中。
return hr;
if( FAILED( hr = g_pDisplay-S