/*
* This private function creates a menu and adds it to the menus list
*/
SFG_Menu* fgCreateMenu( FGCBMenu menuCallback )
{
int x = 100, y = 100, w = 1, h = 1;
SFG_Window *current_window = fgStructure.CurrentWindow;
/* Have the menu object created */
SFG_Menu* menu = (SFG_Menu *)calloc( sizeof(SFG_Menu), 1 );
menu->ParentWindow = NULL;
/* Create a window for the menu to reside in. */
fgCreateWindow( NULL, "freeglut menu", GL_TRUE, x, y, GL_TRUE, w, h,
GL_FALSE, GL_TRUE );
menu->Window = fgStructure.CurrentWindow;
glutDisplayFunc( fgDisplayMenu );
glutHideWindow( ); /* Hide the window for now */
fgSetWindow( current_window );
/* Initialize the object properties: */
menu->ID = ++fgStructure.MenuID;
menu->Callback = menuCallback;
menu->ActiveEntry = NULL;
fgListInit( &menu->Entries );
fgListAppend( &fgStructure.Menus, &menu->Node );
/* Newly created menus implicitly become current ones */
fgStructure.CurrentMenu = menu;
return menu;
}
/*
* Creates a new top-level freeglut window
*/
int FGAPIENTRY glutCreateWindow( const char* title )
{
/* XXX GLUT does not exit; it simply calls "glutInit" quietly if the
* XXX application has not already done so. The "freeglut" community
* XXX decided not to go this route (freeglut-developer e-mail from
* XXX Steve Baker, 12/16/04, 4:22 PM CST, "Re: [Freeglut-developer]
* XXX Desired 'freeglut' behaviour when there is no current window"
*/
FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutCreateWindow" );
return fgCreateWindow( NULL, title, fgState.Position.X, fgState.Position.Y,
fgState.Size.X, fgState.Size.Y, GL_FALSE,
GL_FALSE )->ID;
}
/*
* This function creates a sub window.
*/
int FGAPIENTRY glutCreateSubWindow( int parentID, int x, int y, int w, int h )
{
int ret = 0;
SFG_Window* window = NULL;
SFG_Window* parent = NULL;
freeglut_assert_ready;
parent = fgWindowByID( parentID );
freeglut_return_val_if_fail( parent != NULL, 0 );
window = fgCreateWindow( parent, "", x, y, w, h, GL_FALSE, GL_FALSE );
ret = window->ID;
return ret;
}
/*
* This function creates a sub window.
*/
int FGAPIENTRY glutCreateSubWindow( int parentID, int x, int y, int w, int h )
{
int ret = 0;
SFG_Window* window = NULL;
SFG_Window* parent = NULL;
FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutCreateSubWindow" );
parent = fgWindowByID( parentID );
freeglut_return_val_if_fail( parent != NULL, 0 );
if ( x < 0 )
{
x = parent->State.Width + x ;
if ( w >= 0 ) x -= w ;
}
if ( w < 0 ) w = parent->State.Width - x + w ;
if ( w < 0 )
{
x += w ;
w = -w ;
}
if ( y < 0 )
{
y = parent->State.Height + y ;
if ( h >= 0 ) y -= h ;
}
if ( h < 0 ) h = parent->State.Height - y + h ;
if ( h < 0 )
{
y += h ;
h = -h ;
}
window = fgCreateWindow( parent, "", x, y, w, h, GL_FALSE, GL_FALSE );
ret = window->ID;
return ret;
}
/*
* Enters the game mode
*/
int FGAPIENTRY glutEnterGameMode( void )
{
FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutEnterGameMode" );
if( fgStructure.GameMode )
fgAddToWindowDestroyList( fgStructure.GameMode );
else
fghRememberState( );
if( ! fghChangeDisplayMode( GL_FALSE ) )
{
fgWarning( "failed to change screen settings" );
return 0;
}
fgStructure.GameMode = fgCreateWindow(
NULL, "FREEGLUT", 0, 0,
fgState.GameModeSize.X, fgState.GameModeSize.Y, GL_TRUE, GL_FALSE
);
fgStructure.GameMode->State.Width = fgState.GameModeSize.X;
fgStructure.GameMode->State.Height = fgState.GameModeSize.Y;
fgStructure.GameMode->State.NeedToResize = GL_TRUE;
fgStructure.GameMode->State.IsGameMode = GL_TRUE;
#if TARGET_HOST_UNIX_X11
/*
* Sync needed to avoid a real race, the Xserver must have really created
* the window before we can grab the pointer into it:
*/
XSync( fgDisplay.Display, False );
/*
* Grab the pointer to confine it into the window after the calls to
* XWrapPointer() which ensure that the pointer really enters the window.
*
* We also need to wait here until XGrabPointer() returns GrabSuccess,
* otherwise the new window is not viewable yet and if the next function
* (XSetInputFocus) is called with a not yet viewable window, it will exit
* the application which we have to aviod, so wait until it's viewable:
*/
while( GrabSuccess != XGrabPointer(
fgDisplay.Display, fgStructure.GameMode->Window.Handle,
TRUE,
ButtonPressMask | ButtonReleaseMask | ButtonMotionMask
| PointerMotionMask,
GrabModeAsync, GrabModeAsync,
fgStructure.GameMode->Window.Handle, None, CurrentTime) )
usleep( 100 );
/*
* Change input focus to the new window. This will exit the application
* if the new window is not viewable yet, see the XGrabPointer loop above.
*/
XSetInputFocus(
fgDisplay.Display,
fgStructure.GameMode->Window.Handle,
RevertToNone,
CurrentTime
);
/* Move the Pointer to the middle of the fullscreen window */
XWarpPointer(
fgDisplay.Display,
None,
fgDisplay.RootWindow,
0, 0, 0, 0,
fgState.GameModeSize.X/2, fgState.GameModeSize.Y/2
);
# ifdef X_XF86VidModeSetViewPort
if( fgDisplay.DisplayModeValid )
{
int x, y;
Window child;
/* Change to viewport to the window topleft edge: */
if( !XF86VidModeSetViewPort( fgDisplay.Display, fgDisplay.Screen, 0, 0 ) )
fgWarning( "XF86VidModeSetViewPort failed" );
/*
* Final window repositioning: It could be avoided using an undecorated
* window using override_redirect, but this * would possily require
* more changes and investigation.
*/
/* Get the current postion of the drawable area on screen */
XTranslateCoordinates(
fgDisplay.Display,
fgStructure.CurrentWindow->Window.Handle,
fgDisplay.RootWindow,
0, 0, &x, &y,
&child
);
/* Move the decorataions out of the topleft corner of the display */
XMoveWindow( fgDisplay.Display, fgStructure.CurrentWindow->Window.Handle,
-x, -y);
}
#endif
/* Grab the keyboard, too */
XGrabKeyboard(
fgDisplay.Display,
fgStructure.GameMode->Window.Handle,
FALSE,
GrabModeAsync, GrabModeAsync,
CurrentTime
);
#endif
return fgStructure.GameMode->ID;
}
/*
* Creates a new top-level freeglut window
*/
int FGAPIENTRY glutCreateWindow( const char* title )
{
return fgCreateWindow( NULL, title, fgState.Position.X, fgState.Position.Y,
fgState.Size.X, fgState.Size.Y, GL_FALSE,
GL_FALSE )->ID;
}