SetDisplayMode 只是改变分辨率，为什么会导致程序全屏？

[unhappyless]

如题

[unhappyless]

// DEMO6_1.CPP basic DirectDraw initialization demo

// INCLUDES ///////////////////////////////////////////////

#define WIN32_LEAN_AND_MEAN  // just say no to MFC

#define INITGUID // make sure directX guids are included

#include <windows.h>   // include important windows stuff
#include <windowsx.h> 
#include <mmsystem.h>
#include <iostream> // include important C/C++ stuff
#include <conio.h>
#include <stdlib.h>
#include <malloc.h>
#include <memory.h>
#include <string.h>
#include <stdarg.h>
#include <stdio.h> 
#include <math.h>
#include <io.h>
#include <fcntl.h>

#include <ddraw.h> // include directdraw

// DEFINES ////////////////////////////////////////////////

// defines for windows 
#define WINDOW_CLASS_NAME "WINCLASS1"

// default screen size
#define SCREEN_WIDTH    640  // size of screen
#define SCREEN_HEIGHT   480
#define SCREEN_BPP      8    // bits per pixel
#define MAX_COLORS      256  // maximum colors

// TYPES //////////////////////////////////////////////////////

// basic unsigned types
typedef unsigned short USHORT;
typedef unsigned short WORD;
typedef unsigned char  UCHAR;
typedef unsigned char  BYTE;

// MACROS /////////////////////////////////////////////////

#define KEYDOWN(vk_code) ((GetAsyncKeyState(vk_code) & 0x8000) ? 1 : 0)
#define KEYUP(vk_code)   ((GetAsyncKeyState(vk_code) & 0x8000) ? 0 : 1)

// initializes a direct draw struct
#define DD_INIT_STRUCT(ddstruct) { memset(&ddstruct,0,sizeof(ddstruct)); ddstruct.dwSize=sizeof(ddstruct); }

// GLOBALS ////////////////////////////////////////////////
HWND      main_window_handle = NULL; // globally track main window
HINSTANCE hinstance_app      = NULL; // globally track hinstance

// directdraw stuff

LPDIRECTDRAW7         lpdd         = NULL;   // dd object
LPDIRECTDRAWSURFACE7  lpddsprimary = NULL;   // dd primary surface
LPDIRECTDRAWSURFACE7  lpddsback    = NULL;   // dd back surface
LPDIRECTDRAWPALETTE   lpddpal      = NULL;   // a pointer to the created dd palette
LPDIRECTDRAWCLIPPER   lpddclipper  = NULL;   // dd clipper
PALETTEENTRY          palette[256];          // color palette
PALETTEENTRY          save_palette[256];     // used to save palettes
DDSURFACEDESC2        ddsd;                  // a direct draw surface description struct
DDBLTFX               ddbltfx;               // used to fill
DDSCAPS2              ddscaps;               // a direct draw surface capabilities struct
HRESULT               ddrval;                // result back from dd calls
DWORD                 start_clock_count = 0; // used for timing

// these defined the general clipping rectangle
int min_clip_x = 0,                          // clipping rectangle 
max_clip_x = SCREEN_WIDTH-1,
min_clip_y = 0,
max_clip_y = SCREEN_HEIGHT-1;

// these are overwritten globally by DD_Init()
int screen_width  = SCREEN_WIDTH,            // width of screen
screen_height = SCREEN_HEIGHT,           // height of screen
screen_bpp    = SCREEN_BPP;              // bits per pixel


char buffer[80];                     // general printing buffer

// FUNCTIONS //////////////////////////////////////////////
LRESULT CALLBACK WindowProc(HWND hwnd, 
							UINT msg, 
							WPARAM wparam, 
							LPARAM lparam)
{
	// this is the main message handler of the system
	PAINTSTRUCT		ps;		// used in WM_PAINT
	HDC				hdc;	// handle to a device context
	char buffer[80];        // used to print strings

	// what is the message 
	switch(msg)
	{	
	case WM_CREATE: 
		{
			// do initialization stuff here
			// return success
			return(0);
		} break;

	case WM_PAINT: 
		{
			// simply validate the window 
			hdc = BeginPaint(hwnd,&ps);	 

			// end painting
			EndPaint(hwnd,&ps);

			// return success
			return(0);
		} break;

	case WM_DESTROY: 
		{

			// kill the application, this sends a WM_QUIT message 
			PostQuitMessage(0);

			// return success
			return(0);
		} break;

	default:break;

	} // end switch

	// process any messages that we didn't take care of 
	return (DefWindowProc(hwnd, msg, wparam, lparam));

} // end WinProc

///////////////////////////////////////////////////////////

int Game_Main(void *parms = NULL, int num_parms = 0)
{
	// this is the main loop of the game, do all your processing
	// here

	// for now test if user is hitting ESC and send WM_CLOSE
	if (KEYDOWN(VK_ESCAPE))
		SendMessage(main_window_handle,WM_CLOSE,0,0);

	// return success or failure or your own return code here
	return(1);

} // end Game_Main

[unhappyless]

////////////////////////////////////////////////////////////

int Game_Init(void *parms = NULL, int num_parms = 0)
{
	// this is called once after the initial window is created and
	// before the main event loop is entered, do all your initialization
	// here

	// create IDirectDraw interface 7.0 object and test for error
	if (FAILED(DirectDrawCreateEx(NULL, (void **)&lpdd, IID_IDirectDraw7, NULL)))
		return(0);

	// set cooperation to normal since this will be a windowed app
	lpdd->SetCooperativeLevel(main_window_handle, DDSCL_NORMAL);

	//@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
	//需要：DDraw.lib
	
	//把下面函数注释掉就不全屏了


	//
	//@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
	// set display mode to 640x480x8
	if (FAILED(lpdd->SetDisplayMode(SCREEN_WIDTH, SCREEN_HEIGHT, SCREEN_BPP,0,0)))
	{
		// error
		return(0);
	} // end if
	// return success or failure or your own return code here
	return(1);

} // end Game_Init

/////////////////////////////////////////////////////////////

int Game_Shutdown(void *parms = NULL, int num_parms = 0)
{
	// this is called after the game is exited and the main event
	// loop while is exited, do all you cleanup and shutdown here

	// simply blow away the IDirectDraw4 interface
	if (lpdd)
	{
		lpdd->Release();
		lpdd = NULL;
	} // end if

	// return success or failure or your own return code here
	return(1);

} // end Game_Shutdown

// WINMAIN ////////////////////////////////////////////////
int WINAPI WinMain(	HINSTANCE hinstance,
				   HINSTANCE hprevinstance,
				   LPSTR lpcmdline,
				   int ncmdshow)
{

	WNDCLASSEX winclass; // this will hold the class we create
	HWND	   hwnd;	 // generic window handle
	MSG		   msg;		 // generic message
	HDC        hdc;      // graphics device context

	// first fill in the window class stucture
	winclass.cbSize         = sizeof(WNDCLASSEX);
	winclass.style			= CS_DBLCLKS | CS_OWNDC | 
		CS_HREDRAW | CS_VREDRAW;
	winclass.lpfnWndProc	= WindowProc;
	winclass.cbClsExtra		= 0;
	winclass.cbWndExtra		= 0;
	winclass.hInstance		= hinstance;
	winclass.hIcon			= LoadIcon(NULL, IDI_APPLICATION);
	winclass.hCursor		= LoadCursor(NULL, IDC_ARROW); 
	winclass.hbrBackground	= (HBRUSH)GetStockObject(BLACK_BRUSH);
	winclass.lpszMenuName	= NULL;
	winclass.lpszClassName	= WINDOW_CLASS_NAME;
	winclass.hIconSm        = LoadIcon(NULL, IDI_APPLICATION);

	// save hinstance in global
	hinstance_app = hinstance;

	// register the window class
	if (!RegisterClassEx(&winclass))
		return(0);

	// create the window
	if (!(hwnd = CreateWindowEx(NULL,                  // extended style
		WINDOW_CLASS_NAME,     // class
		"DirectDraw Initialization Demo", // title
		WS_OVERLAPPEDWINDOW | WS_VISIBLE,
		0,0,	  // initial x,y
		400,300,  // initial width, height
		NULL,	  // handle to parent 
		NULL,	  // handle to menu
		hinstance,// instance of this application
		NULL)))	// extra creation parms
		return(0);

	// save main window handle
	main_window_handle = hwnd;

	// initialize game here
	Game_Init();

	// enter main event loop
	while(TRUE)
	{
		// test if there is a message in queue, if so get it
		if (PeekMessage(&msg,NULL,0,0,PM_REMOVE))
		{ 
			// test if this is a quit
			if (msg.message == WM_QUIT)
				break;

			// translate any accelerator keys
			TranslateMessage(&msg);

			// send the message to the window proc
			DispatchMessage(&msg);
		} // end if

		// main game processing goes here
		Game_Main();

	} // end while

	// closedown game here
	Game_Shutdown();

	// return to Windows like this
	return(msg.wParam);

} // end WinMain

///////////////////////////////////////////////////////////

[帅得不敢出门]

这个改的又不是分辨率,而是显示模式
定义文件在显示出来的模式。可以设定(缩小放大)的级数：使到显示出来的页面为全画面、窗口的全宽度、使用真正的大小、安比例(缩小放大)或使用默认值
http://www.21andy.com/fpdf-manual/setdisplaymode.htm

[unhappyless]

// set display mode to 640x480x8
if (FAILED(lpdd->SetDisplayMode(SCREEN_WIDTH, SCREEN_HEIGHT, SCREEN_BPP,0,0)))


640x480x8 这大小也不是全屏大小吧

[having_hr]

SetCooperativeLevel也没有设错的话，就很奇怪了

[having_hr]

我的这样写都没问题

#include "stdafx.h"
#include "MyDraw.h"

LPDIRECTDRAW7 lpDDraw7 = NULL; //----------DirectDraw 对象接口

LPDIRECTDRAWSURFACE7 lpDDprimary=NULL;
LPDIRECTDRAWSURFACE7 lpDDback=NULL;
DDSURFACEDESC2 ddsd;

int SCREEN_WIDTH = 1024; //屏幕宽度
int SCREEN_HEIGHT = 768; //屏幕高度
const int SCREEN_BPP = 32; //色深

int MyDrawInit(bool fullscreen)

{
LPDIRECTDRAW lpDDraw_temp; //临时指针指向创建的DirectDraw 对象，并用来查询最新的DirectDraw接口。

//------------------------------------------------------------------------------------------------------------------------------
if( FAILED( DirectDrawCreate( NULL, &lpDDraw_temp,NULL ) ) ) //创建Direct Draw对象，指针存放在lpDDraw_temp。
{
MessageBox(NULL,TEXT("DirectDraw Create error!"),TEXT("wrong!"),MB_OK);
return 0;
}


//------------------------------------------------------------------------------------------------------------------------------
if(FAILED(lpDDraw_temp->QueryInterface(IID_IDirectDraw7,(LPVOID*)&lpDDraw7))) //通过查询获得最新DirectDraw接口，把指针存放在 lpDDraw7中。
{
MessageBox(NULL,TEXT("DirectDraw QueryInterface error!"),TEXT("wrong!"),MB_OK);
return 0;
}

//------------------------------------------------------------------------------------------------------------------------------
if(fullscreen)
{
if(FAILED(lpDDraw7->SetCooperativeLevel(main_hwnd,DDSCL_FULLSCREEN|DDSCL_EXCLUSIVE))) // 设置协同等级，这里是全屏幕模式。
{
MessageBox(NULL,TEXT("DirectDraw SetCooperativeLevel error!"),TEXT("wrong!"),MB_OK);
return 0;
}

//------------------------------------------------------------------------------------------------------------------------------
if(FAILED(lpDDraw7->SetDisplayMode(SCREEN_WIDTH,SCREEN_HEIGHT,SCREEN_BPP,0,0))) //设置游戏的显示模式，分辨率与色深。先尝试1024 x 768
{
MessageBox(NULL,TEXT("This display card does not support 1024x768x16."),TEXT("DirectDraw Sample"),MB_ICONERROR|MB_OK );

SCREEN_WIDTH = 800;
SCREEN_HEIGHT= 600;

if(FAILED(lpDDraw7->SetDisplayMode(SCREEN_WIDTH,SCREEN_HEIGHT,SCREEN_BPP,0,0))) //设置游戏的显示模式，分辨率与色深。再尝试800 x 600
{
MessageBox(NULL,TEXT("DirectDraw SetDisplayMode error!"),TEXT("wrong!"),MB_OK);
return 0;
}
}
memset(&ddsd,0,sizeof(ddsd));
ddsd.dwSize=sizeof(ddsd);
ddsd.dwFlags=DDSD_CAPS|DDSD_BACKBUFFERCOUNT;
ddsd.dwBackBufferCount=1;
ddsd.ddsCaps.dwCaps=DDSCAPS_PRIMARYSURFACE|DDSCAPS_COMPLEX|DDSCAPS_FLIP;

if(FAILED(lpDDraw7->CreateSurface(&ddsd,&lpDDprimary,NULL)))
{
MessageBox(NULL,TEXT("DirectDraw Create Primary Surface error!"),TEXT("wrong!"),MB_OK);
return 0;
}

ddsd.ddsCaps.dwCaps=DDSCAPS_BACKBUFFER;

if(FAILED(lpDDprimary->GetAttachedSurface(&ddsd.ddsCaps,&lpDDback)))
{
MessageBox(NULL,TEXT("DirectDraw Create Back Surface error!"),TEXT("wrong!"),MB_OK);
return 0;
}
}
else // 在窗口模式下的设置
{
if(FAILED(lpDDraw7->SetCooperativeLevel(main_hwnd,DDSCL_NORMAL))) // 设置协同等级，这里是窗口模式。
{
MessageBox(NULL,TEXT("DirectDraw SetCooperativeLevel error!"),TEXT("wrong!"),MB_OK);
return 0;
}
memset(&ddsd, 0,sizeof(ddsd)); //把结构体清零
ddsd.dwSize = sizeof(ddsd); //获得结构体大小
ddsd.dwFlags = DDSD_CAPS; //表明下面需要被填充的结构体参数
ddsd.ddsCaps.dwCaps = DDSCAPS_PRIMARYSURFACE; //设置表面的特性，这里把画面设为：主画面
if(FAILED(lpDDraw7->CreateSurface(&ddsd,&lpDDprimary,NULL))) //创建主表面，把设置好的ddsd结构参数传递给系统，并把创建好的主表面指针存放于lpDDprimary中
{
MessageBox(NULL,TEXT("DirectDraw Create Primary Surface error!"),TEXT("wrong!"),MB_OK);
return 0;
}

RECT rect; // 创立窗口模式的后备表面。
GetClientRect(main_hwnd, &rect); // 通过main_hwnd得到用户区范围
memset(&ddsd, 0,sizeof(ddsd));
ddsd.dwSize = sizeof(ddsd);
ddsd.dwFlags = DDSD_CAPS | DDSD_WIDTH | DDSD_HEIGHT;
ddsd.dwWidth = rect.right - rect.left; // 该离屏表面的大小和用户区的大小一样
ddsd.dwHeight = rect.bottom - rect.top;
ddsd.ddsCaps.dwCaps = DDSCAPS_OFFSCREENPLAIN; // 把此后备表面设置为离屏表面

if(FAILED(lpDDraw7->CreateSurface(&ddsd, &lpDDback, NULL))) // 这次lpDDback指向的不是后备表面,而是离屏表面
{
MessageBox(NULL, TEXT("DirectDraw Create Window Surface error!"), TEXT("Wrong"), MB_OK);
return 0;
}
}




LPDIRECTDRAWCLIPPER pcClipper; //声明剪切板对象指针

if( FAILED( lpDDraw7->CreateClipper(0, &pcClipper, NULL))) //创建剪切板对象
return 0;

if( FAILED( pcClipper->SetHWnd( 0, main_hwnd))) //设置剪切板裁剪区域为指定（通过窗口句柄main_hwnd指定）窗口大小
{
pcClipper->Release();
return 0;
}

if(fullscreen)
{
if( FAILED( lpDDback->SetClipper(pcClipper))) //把制定好剪切板与后备缓冲表面关联
{
pcClipper->Release();
return 0;
}
}
else
{
if(FAILED(lpDDprimary->SetClipper(pcClipper)))
{
pcClipper->Release();
return 0;
}
}
pcClipper->Release();


//------------------------------------------------------------------------------------------------------------------------------
//请在这加入创建主表面的代码：

//------------------------------------------------------------------------------------------------------------------------------
return 1;
}

int MyDrawShut()
{
if(lpDDback)
{
lpDDback->Release();
lpDDback=NULL;
}
if(lpDDprimary)
{
lpDDprimary->Release();
lpDDprimary=NULL;
}

if(lpDDraw7)
{
lpDDraw7->Release();
lpDDraw7=NULL;
}


return 1;
}


LPDIRECTDRAWSURFACE7 DDLoadBitmap(LPCTSTR FileName)
{
HBITMAP hbmp; //位图的句柄
HDC hdc,dhdc; //设备环境的句柄
hbmp=(HBITMAP)::LoadImage(NULL,FileName,IMAGE_BITMAP,0,0,LR_LOADFROMFILE); //以文件形式读取位图给hbmp，

if(hbmp==NULL)
{
MessageBox(NULL,TEXT("读取位图失败!"),TEXT("Wrong!"),MB_OK);
return NULL;
}
BITMAP bm; //BITMAP结构
GetObject(hbmp,sizeof(bm),&bm); //得到hbmp的信息，存放在bm里

DDSURFACEDESC2 ddsd2; //建立表面结构信息ddsd2
LPDIRECTDRAWSURFACE7 lpdds; //建立一个理屏表面的指针lpdds
memset(&ddsd2,0,sizeof(ddsd2));
ddsd2.dwSize=sizeof(ddsd2);
ddsd2.dwFlags=DDSD_CAPS|DDSD_WIDTH|DDSD_HEIGHT; // 标明接着需要填充的表面内容
ddsd2.dwWidth=bm.bmWidth; // 表面的宽度等于位图的宽度
ddsd2.dwHeight=bm.bmHeight; // 表面的高度等于位图的高度
ddsd2.ddsCaps.dwCaps=DDSCAPS_OFFSCREENPLAIN|DDSCAPS_SYSTEMMEMORY; //标明离屏表面| 存放于系统内存中

if(FAILED(lpDDraw7->CreateSurface(&ddsd2,&lpdds,NULL))) //创建离屏表面，并把该表面指针存放在lpdds中
{
MessageBox(NULL,TEXT("创建表面失败!"),TEXT("Wrong!"),MB_OK);
return 0;
}
hdc=::CreateCompatibleDC(NULL); //为当前屏幕创建与设备环境兼容的内存
::SelectObject(hdc,hbmp); //挑选位图对象hbmp到HDC中
lpdds->GetDC(&dhdc); //让离屏表面lpdds获得HDC句柄；
::BitBlt(dhdc,0,0,bm.bmWidth ,bm.bmHeight ,hdc,0,0,SRCCOPY);//把整个位图Blt 到离屏表面上
lpdds->ReleaseDC(dhdc); //释放dhdc资源
return lpdds; //完成离屏表面的建立并把返回该表面指针

}


int Clear(DWORD Color) //清屏函数
{
DDBLTFX ddbltfx; //建立DDBLTFX结构ddbltfx
memset(&ddbltfx,0,sizeof(DDBLTFX));
ddbltfx.dwSize=sizeof(ddbltfx);
ddbltfx.dwFillColor =Color; //为该绘图区填充颜色,这也就是游戏背景的颜色

lpDDback->Blt(NULL,NULL,NULL,DDBLT_WAIT|DDBLT_COLORFILL,&ddbltfx); //把ddbltfx Blt上后备表面,作清屏之用
return 1;
}