[Windows API] implement win32api Full Screen

출처 : http://www.daniweb.com/software-development/cpp/threads/370926/windows-api-screen-resolution

I'm pretty sure I'm doing everything in there except for the OpenGL stuff, I'm not using that yet. Basically I have a Window 'Init' function, it goes like this:

bool CWindow::Init( HINSTANCE hInst, int width, int height, bool fullscreen, char *caption, WindowProcedure_t proc )

{

RECT rScreenRect;

RECT rWndRect = { 0, 0, width, height };

// the actual size of the window, including menu

int iWndWidth = ( rWndRect.right - rWndRect.left );

int iWndHeight = ( rWndRect.bottom - rWndRect.top );

// Register the windows class

memset(&m_WindowClass, 0, sizeof(m_WindowClass));

m_WindowClass.cbSize = sizeof(m_WindowClass);

m_WindowClass.lpfnWndProc = (WNDPROC)WindowProc;

m_WindowClass.hInstance = hInst;

m_WindowClass.hCursor = LoadCursor(0, IDC_ARROW);

m_WindowClass.hbrBackground = (HBRUSH) GetStockObject(LTGRAY_BRUSH);

m_WindowClass.lpszClassName = "WindowClass";

if( !m_bRegistered )

{

if( !RegisterClassEx(&m_WindowClass) )

return false;

//m_bRegistered = true;

}

DWORD dwExStyle = WS_EX_APPWINDOW | WS_EX_WINDOWEDGE;

DWORD dwStyle = WS_OVERLAPPEDWINDOW;

if( fullscreen )

{

DEVMODE dmScreenSettings;

memset( &dmScreenSettings, 0, sizeof( dmScreenSettings ) );

dmScreenSettings.dmSize = sizeof( dmScreenSettings );

dmScreenSettings.dmPelsWidth = width;

dmScreenSettings.dmPelsHeight = height;

dmScreenSettings.dmBitsPerPel = 32;

dmScreenSettings.dmFields = DM_BITSPERPEL | DM_PELSWIDTH | DM_PELSHEIGHT;

if( ChangeDisplaySettings( &dmScreenSettings, CDS_FULLSCREEN ) != DISP_CHANGE_SUCCESSFUL )

return false;

dwExStyle = WS_EX_APPWINDOW;

dwStyle = WS_POPUP;

ShowCursor( FALSE );

}

AdjustWindowRectEx( &rWndRect, dwStyle, false, dwExStyle );

GetWindowRect( GetDesktopWindow(), &rScreenRect );

int iX = ( (rScreenRect.right - rScreenRect.left) - iWndWidth ) >> 1;

int iY = ( (rScreenRect.bottom - rScreenRect.top) - iWndHeight ) >> 1;

m_pWindowHandle = CreateWindowEx( dwExStyle, "WindowClass", caption, dwStyle, 

iX, iY, iWndWidth, iWndHeight, 

NULL, 0, GetModuleHandle( 0 ), 0 );

ShowWindow( m_pWindowHandle, SW_SHOW );

UpdateWindow( m_pWindowHandle );

m_nWidth = iWndWidth;

m_nHeight = iWndHeight;

m_bFullscreen = fullscreen;

m_pModule = hInst;

V_strncpy( m_WindowCaption, caption, 1024 );

s_WindowProcedure = proc;

return true;

}

Which works fine when in windowed mode, but does the thing I described when I try to switch to fullscreen. This is the function I call when I want to change the size/fullscreen state of the window:

NOTE: I have fullscreen as an int here to allow you to specify -1 to tell the function to not change the fullscreen state.

void CWindow::SetSize( int width, int height, int fullscreen )

{

WindowProcedure_t temp = s_WindowProcedure;

s_WindowProcedure = NULL;

DestroyWindow( m_pWindowHandle );

UnregisterClass( m_WindowClass.lpszClassName, m_pModule );

#define fs ( ( fullscreen == -1 ) ? m_bFullscreen : ( ( fullscreen == 1 ) ? true : false ) )

if( !m_bFullscreen )

{

Init( m_pModule, width, height, fs, m_WindowCaption, temp );

return;

}

int screenwidth = 1366; //GetSystemMetrics( SM_CXFULLSCREEN );

int screenheight = 768; //GetSystemMetrics( SM_CYFULLSCREEN );

Init( m_pModule, screenwidth, screenheight, fs, m_WindowCaption, temp );

}