Question

求一个只用window api写的能全屏显示的程序

在VS2005编译器,项目类型是Visual C++下的Win32(不是mfc),用windows api写一个能全屏显示的程序(系统任务栏也要盖住).

Answer 1

#pragma comment(lib,"opengl32.lib")
#pragma comment(lib,"glu32.lib")
#pragma comment(lib,"glaux.lib")

#include <windows.h>
#include <gl/gl.h>
#include <gl/glu.h>
#include <gl/glaux.h>

HDC hDC=NULL;
HGLRC hRC=NULL;
HWND hWnd=NULL;
HINSTANCE hInstance;

BOOL keys[256];
BOOL active=TRUE;
BOOL fullscreen=TRUE;

GLfloat rtri;
GLfloat rquad;

LRESULT CALLBACK WndProc(HWND,UINT,WPARAM,LPARAM);

GLvoid ResizeGLScene(GLsizei width,GLsizei height)
{
if(height==0)
height=1;
glViewport(0,0,width,height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();

gluPerspective(45.0f,(GLfloat)width/(GLfloat)height,0.1f,100.0f);

glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}

int InitGL(GLvoid)
{
glShadeModel(GL_SMOOTH);
glClearColor(0.0f,0.0f,0.0f,0.5f);
glClearDepth(1.0f);
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LEQUAL);

glHint(GL_PERSPECTIVE_CORRECTION_HINT,GL_NICEST);
return TRUE;
}

int DrawGLScene(GLvoid)
{
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
glLoadIdentity();

glTranslatef(-1.5f,0.0f,-6.0f);
glRotatef(rtri,0.0f,1.0f,0.0f);
glBegin(GL_TRIANGLES);
glColor3f(1.0f,0.0f,0.0f);
glVertex3f(0.0f,1.0f,0.0f);
glColor3f(0.0f,1.0f,0.0f);
glVertex3f(-1.0f,-1.0f,1.0f);
glColor3f(0.0f,0.0f,1.0f);
glVertex3f(1.0f,-1.0f,1.0f);

glColor3f(1.0f,0.0f,0.0f);
glVertex3f(0.0f,1.0f,0.0f);
glColor3f(0.0f,0.0f,1.0f);
glVertex3f(1.0f,-1.0f,1.0f);
glColor3f(0.0f,1.0f,0.0f);
glVertex3f(1.0f,-1.0f,-1.0f);

glColor3f(1.0f,0.0f,0.0f);
glVertex3f(0.0f,1.0f,0.0f);
glColor3f(0.0f,1.0f,0.0f);
glVertex3f(1.0f,-1.0f,-1.0f);
glColor3f(0.0f,0.0f,1.0f);
glVertex3f(-1.0f,-1.0f,-1.0f);

glColor3f(1.0f,0.0f,0.0f);
glVertex3f(0.0f,1.0f,0.0f);
glColor3f(0.0f,0.0f,1.0f);
glVertex3f(-1.0f,-1.0f,-1.0f);
glColor3f(0.0f,1.0f,0.0f);
glVertex3f(-1.0f,-1.0f,1.0f);
glEnd();

glLoadIdentity();
glTranslatef(1.5f,0.0f,-7.0f);
glRotatef(rquad,1.0f,1.0f,1.0f);
glBegin(GL_QUADS);
glColor3f(0.0f,1.0f,0.0f);
glVertex3f(1.0f,1.0f,-1.0f);
glVertex3f(-1.0f,1.0f,-1.0f);
glVertex3f(-1.0f,1.0f,1.0f);
glVertex3f(1.0f,1.0f,1.0f);

glColor3f(1.0f,0.5f,0.0f);
glVertex3f(1.0f,-1.0f,1.0f);
glVertex3f(-1.0f,-1.0f,1.0f);
glVertex3f(-1.0f,-1.0f,-1.0f);
glVertex3f(1.0f,-1.0f,-1.0f);

glColor3f(1.0f,0.0f,0.0f);
glVertex3f(1.0f,1.0f,1.0f);
glVertex3f(-1.0f,1.0f,1.0f);
glVertex3f(-1.0f,-1.0f,1.0f);
glVertex3f(1.0f,-1.0f,1.0f);

glColor3f(1.0f,1.0f,0.0f);
//glVertex3f(1.0f,-1.0f,-1.0f);
//glVertex3f(-1.0f,-1.0f,-1.0f);
//glVertex3f(-1.0f,1.0f,-1.0f);
//glVertex3f(1.0f,1.0f,-1.0f);
glVertex3f(-1.0f,1.0f,-1.0f);
glVertex3f(1.0f,1.0f,-1.0f);
glVertex3f(1.0f,-1.0f,-1.0f);
glVertex3f(-1.0f,-1.0f,-1.0f);

glColor3f(0.0f,0.0f,1.0f);
glVertex3f(-1.0f,1.0f,1.0f);
glVertex3f(-1.0f,1.0f,-1.0f);
glVertex3f(-1.0f,-1.0f,-1.0f);
glVertex3f(-1.0f,-1.0f,1.0f);

glColor3f(1.0f,0.0f,1.0f);
glVertex3f(1.0f,1.0f,-1.0f);
glVertex3f(1.0f,1.0f,1.0f);
glVertex3f(1.0f,-1.0f,1.0f);
glVertex3f(1.0f,-1.0f,-1.0f);
glEnd();

rtri+=0.2f;
rquad-=0.15f;

return TRUE;
}

GLvoid KillGLWindow(GLvoid)
{
if(fullscreen)
{
ChangeDisplaySettings(NULL,0);
ShowCursor(TRUE);
}

if(hRC)
{
if(!wglMakeCurrent(NULL,NULL))
MessageBox(NULL,"释放DC或RC失败","关闭错误",MB_OK|MB_ICONINFORMATION);
if(!wglDeleteContext(hRC))
MessageBox(NULL,"释放RC失败","关闭错误",MB_OK|MB_ICONINFORMATION);
hRC=NULL;
}

if(hDC && !ReleaseDC(hWnd,hDC))
{
MessageBox(NULL,"释放DC失败","关闭错误",MB_OK|MB_ICONINFORMATION);
hDC=NULL;
}

if(hWnd && !DestroyWindow(hWnd))
{
MessageBox(NULL,"释放窗口句柄失败","关闭错误",MB_OK|MB_ICONINFORMATION);
hWnd=NULL;
}

if(!UnregisterClass("OpenG",hInstance))
{
MessageBox(NULL,"不能注销窗口类","关闭错误",MB_OK|MB_ICONINFORMATION);
hInstance=NULL;
}
}

BOOL CreateGLWindow(char* title,int width,int height,int bits,BOOL fullscreenflag)
{
GLuint PixelFormat;
WNDCLASS wc;
DWORD dwExStyle;
DWORD dwStyle;

RECT WindowRect;
WindowRect.left=(long)0;
WindowRect.right=(long)width;
WindowRect.top=(long)0;
WindowRect.bottom=(long)height;

fullscreen=fullscreenflag;

hInstance=GetModuleHandle(NULL);
wc.style=CS_HREDRAW|CS_VREDRAW|CS_OWNDC;
wc.lpfnWndProc=(WNDPROC)WndProc;
wc.cbClsExtra=0;
wc.cbWndExtra=0;
wc.hInstance=hInstance;
wc.hIcon=LoadIcon(NULL,IDI_WINLOGO);
wc.hCursor=LoadCursor(NULL,IDC_ARROW);
wc.hbrBackground=NULL;
wc.lpszMenuName=NULL;
wc.lpszClassName="OpenG";

if(!RegisterClass(&wc))
{
MessageBox(NULL,"注册窗口失败","错误",MB_OK|MB_ICONINFORMATION);
return FALSE;
}

if(fullscreen)
{
DEVMODE dmScreenSettings;
memset(&dmScreenSettings,0,sizeof(dmScreenSettings));
dmScreenSettings.dmSize=sizeof(dmScreenSettings);
dmScreenSettings.dmPelsWidth=width;
dmScreenSettings.dmPelsHeight=height;
dmScreenSettings.dmBitsPerPel=bits;
dmScreenSettings.dmFields=DM_BITSPERPEL|DM_PELSWIDTH|DM_PELSHEIGHT;

if(ChangeDisplaySettings(&dmScreenSettings,CDS_FULLSCREEN)!=DISP_CHANGE_SUCCESSFUL)
{
if(MessageBox(NULL,"全屏模式设置失败！\n使用窗口模式？","OpenGL 3D游戏编程",MB_YESNO|MB_ICONEXCLAMATION)==IDYES)
{
fullscreen=FALSE;
}
else
{
MessageBox(NULL,"程序将被关闭","错误",MB_OK|MB_ICONINFORMATION);
return FALSE;
}
}
}

if(fullscreen)
{
dwExStyle=WS_EX_APPWINDOW;
dwStyle=WS_POPUP;
ShowCursor(FALSE);
}
else
{
dwExStyle=WS_EX_APPWINDOW|WS_EX_WINDOWEDGE;
dwStyle=WS_OVERLAPPEDWINDOW;
}
AdjustWindowRectEx(&WindowRect,dwStyle,FALSE,dwExStyle);

if(!(hWnd=CreateWindowEx(dwExStyle,"OpenG",title,
dwStyle|WS_CLIPSIBLINGS|WS_CLIPCHILDREN,0,0,
WindowRect.right-WindowRect.left,WindowRect.bottom-WindowRect.top,
NULL,NULL,hInstance,NULL)))
{
KillGLWindow();
MessageBox(NULL,"窗口创建失败","错误",MB_OK|MB_ICONINFORMATION);
return FALSE;
}

static PIXELFORMATDESCRIPTOR pfd=
{
sizeof(PIXELFORMATDESCRIPTOR),1,
PFD_DRAW_TO_WINDOW|PFD_SUPPORT_OPENGL|PFD_DOUBLEBUFFER,
PFD_TYPE_RGBA,bits,
0,0,0,0,0,0,
0,
0,
0,
0,0,0,0,
16,
0,
0,
PFD_MAIN_PLANE,
0,
0,0,0
};

if(!(hDC=GetDC(hWnd)))
{
KillGLWindow();
MessageBox(NULL,"不能创建一个窗口设备描述表","错误",MB_OK|MB_ICONINFORMATION);
return FALSE;
}

if(!(PixelFormat=ChoosePixelFormat(hDC,&pfd)))
{
KillGLWindow();
MessageBox(NULL,"不能创建一个匹配的像素格式","错误",MB_OK|MB_ICONINFORMATION);
return FALSE;
}

if(!SetPixelFormat(hDC,PixelFormat,&pfd))
{
KillGLWindow();
MessageBox(NULL,"不能设置像素格式","错误",MB_OK|MB_ICONINFORMATION);
return FALSE;
}

if(!(hRC=wglCreateContext(hDC)))
{
KillGLWindow();
MessageBox(NULL,"不能创建OpenGL渲染描述表","错误",MB_OK|MB_ICONINFORMATION);
return FALSE;
}

if(!wglMakeCurrent(hDC,hRC))
{
KillGLWindow();
MessageBox(NULL,"不能激活当前的OpenGL渲染描述表","错误",MB_OK|MB_ICONINFORMATION);
return FALSE;
}

ShowWindow(hWnd,SW_SHOW);
SetForegroundWindow(hWnd);
SetFocus(hWnd);
ResizeGLScene(width,height);

if(!InitGL())
{
KillGLWindow();
MessageBox(NULL,"初始化失败","错误",MB_OK|MB_ICONINFORMATION);
return FALSE;
}

return TRUE;
}

LRESULT CALLBACK WndProc(HWND hWnd,UINT uMsg,WPARAM wParam,LPARAM lParam)
{
switch(uMsg)
{
case WM_ACTIVATE:
{
if(!HIWORD(wParam))
active=TRUE;
else
active=FALSE;
return 0;
}
case WM_SYSCOMMAND:
{
switch(wParam)
{
case SC_SCREENSAVE:
case SC_MONITORPOWER:
return 0;
}
break;
}
case WM_CLOSE:
{
PostQuitMessage(0);
return 0;
}
case WM_KEYDOWN:
{
keys[wParam]=TRUE;
return 0;
}
case WM_KEYUP:
{
keys[wParam]=FALSE;
return 0;
}
case WM_SIZE:
{
ResizeGLScene(LOWORD(lParam),HIWORD(lParam));
return 0;
}
}
return DefWindowProc(hWnd,uMsg,wParam,lParam);
}

int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,LPSTR lpCmdLine,int nCmdShow)
{
MSG msg;
BOOL done=FALSE;

if(MessageBox(NULL,"你想在全屏模式下运行吗？","设置全屏模式",MB_YESNO|MB_ICONQUESTION)==IDNO)
{
fullscreen=FALSE;
}

if(!CreateGLWindow("Win32 SDK风格 OpenGL程序框架",640,480,16,fullscreen))
return 0;

while(!done)
{
if(PeekMessage(&msg,NULL,0,0,PM_REMOVE))
{
if(msg.message==WM_QUIT)
done=TRUE;
else
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
else
{
if(active)
{
if(keys[VK_ESCAPE])
done=TRUE;
else
{
DrawGLScene();
SwapBuffers(hDC);
}
}
if(keys[VK_F1])
{
keys[VK_F1]=FALSE;
KillGLWindow();
fullscreen=!fullscreen;
if(!CreateGLWindow("Win32 SDK风格 OpenGL程序框架",640,480,16,fullscreen))
return 0;
}
}
}
KillGLWindow();
return msg.wParam;
}

这是一个OpenGL API程序，VC6.0下可以运行，VS2005应该也没有问题，

全屏的关键代码在这
if(fullscreen)
{
DEVMODE dmScreenSettings;
memset(&dmScreenSettings,0,sizeof(dmScreenSettings));
dmScreenSettings.dmSize=sizeof(dmScreenSettings);
dmScreenSettings.dmPelsWidth=width;
dmScreenSettings.dmPelsHeight=height;
dmScreenSettings.dmBitsPerPel=bits;
dmScreenSettings.dmFields=DM_BITSPERPEL|DM_PELSWIDTH|DM_PELSHEIGHT;

if(ChangeDisplaySettings(&dmScreenSettings,CDS_FULLSCREEN)!=DISP_CHANGE_SUCCESSFUL)
{
if(MessageBox(NULL,"全屏模式设置失败！\n使用窗口模式？","OpenGL 3D游戏编程",MB_YESNO|MB_ICONEXCLAMATION)==IDYES)
{
fullscreen=FALSE;
}
else
{
MessageBox(NULL,"程序将被关闭","错误",MB_OK|MB_ICONINFORMATION);
return FALSE;
}
}
}

ChangeDisplaySettings(&dmScreenSettings,CDS_FULLSCREEN)
将窗口切换为全屏模式

Answer 2

//请用alt+f4关闭该窗口，以下代码可运行于vc6至vc9(vs2008)版本
#include <windows.h>

LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;

int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
PSTR szCmdLine, int iCmdShow)
{
static TCHAR szAppName[] = TEXT ("HelloWin") ;
HWND hwnd ;
MSG msg ;
WNDCLASS wndclass ;

wndclass.style = CS_HREDRAW | CS_VREDRAW ;
wndclass.lpfnWndProc = WndProc ;
wndclass.cbClsExtra = 0 ;
wndclass.cbWndExtra = 0 ;
wndclass.hInstance = hInstance ;
wndclass.hIcon = LoadIcon (NULL, IDI_APPLICATION) ;
wndclass.hCursor = LoadCursor (NULL, IDC_ARROW) ;
wndclass.hbrBackground= (HBRUSH) GetStockObject (WHITE_BRUSH) ;
wndclass.lpszMenuName = NULL ;
wndclass.lpszClassName= szAppName ;

if (!RegisterClass (&wndclass))
{
MessageBox ( NULL, TEXT ("This program requires Windows NT!"),
szAppName, MB_ICONERROR) ;
return 0 ;
}

hwnd = CreateWindow( szAppName, // window class name
TEXT ("Full Screen Display"), // window caption
// WS_OVERLAPPEDWINDOW, // window style
WS_POPUP,
// CW_USEDEFAULT,// initial x position
// CW_USEDEFAULT,// initial y position
// CW_USEDEFAULT,// initial x size
// CW_USEDEFAULT,// initial y size
0,
0,
::GetSystemMetrics(SM_CXSCREEN),
::GetSystemMetrics(SM_CYSCREEN),
NULL, // parent window handle
NULL, // window menu handle
hInstance, // program instance handle
NULL) ; // creation parameters

ShowWindow (hwnd, iCmdShow) ;
UpdateWindow (hwnd) ;

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

LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
HDC hdc ;
PAINTSTRUCT ps ;
RECT rect ;

switch (message)
{
case WM_CREATE:
// PlaySound (TEXT ("hellowin.wav"), NULL, SND_FILENAME | SND_ASYNC) ;
return 0 ;
case WM_PAINT:
hdc = BeginPaint (hwnd, &ps) ;
GetClientRect (hwnd, &rect) ;
DrawText (hdc, TEXT ("This window can cover the task item!"), -1, &rect,
DT_SINGLELINE | DT_CENTER | DT_VCENTER) ;
EndPaint (hwnd, &ps) ;
return 0 ;
case WM_DESTROY:
PostQuitMessage (0) ;
return 0 ;
}
return DefWindowProc (hwnd, message, wParam, lParam) ;
}