/*
* Opens a window. Requires a SFG_Window object created and attached
* to the freeglut structure. OpenGL context is created here.
*/
void fgOpenWindow( SFG_Window* window, const char* title,
int x, int y, int w, int h,
GLboolean gameMode, GLboolean isSubWindow )
{
#if TARGET_HOST_UNIX_X11
XSetWindowAttributes winAttr;
XTextProperty textProperty;
XSizeHints sizeHints;
XWMHints wmHints;
unsigned long mask;
unsigned int current_DisplayMode = fgState.DisplayMode ;
/* Save the display mode if we are creating a menu window */
if( window->IsMenu && ( ! fgStructure.MenuContext ) )
fgState.DisplayMode = GLUT_DOUBLE | GLUT_RGB ;
window->Window.VisualInfo = fgChooseVisual( );
if( window->IsMenu && ( ! fgStructure.MenuContext ) )
fgState.DisplayMode = current_DisplayMode ;
if( ! window->Window.VisualInfo )
{
/*
* The "fgChooseVisual" returned a null meaning that the visual
* context is not available.
* Try a couple of variations to see if they will work.
*/
if( !( fgState.DisplayMode & GLUT_DOUBLE ) )
{
fgState.DisplayMode |= GLUT_DOUBLE ;
window->Window.VisualInfo = fgChooseVisual( );
fgState.DisplayMode &= ~GLUT_DOUBLE;
}
/*
* GLUT also checks for multi-sampling, but I don't see that
* anywhere else in FREEGLUT so I won't bother with it for the moment.
*/
}
FREEGLUT_INTERNAL_ERROR_EXIT( window->Window.VisualInfo != NULL,
"Visual with necessary capabilities not found", "fgOpenWindow" );
/*
* XXX HINT: the masks should be updated when adding/removing callbacks.
* XXX This might speed up message processing. Is that true?
* XXX
* XXX A: Not appreciably, but it WILL make it easier to debug.
* XXX Try tracing old GLUT and try tracing freeglut. Old GLUT
* XXX turns off events that it doesn't need and is a whole lot
* XXX more pleasant to trace. (Think mouse-motion! Tons of
* XXX ``bonus'' GUI events stream in.)
*/
winAttr.event_mask =
StructureNotifyMask | SubstructureNotifyMask | ExposureMask |
ButtonPressMask | ButtonReleaseMask | KeyPressMask | KeyReleaseMask |
VisibilityChangeMask | EnterWindowMask | LeaveWindowMask |
PointerMotionMask | ButtonMotionMask;
winAttr.background_pixmap = None;
winAttr.background_pixel = 0;
winAttr.border_pixel = 0;
winAttr.colormap = XCreateColormap(
fgDisplay.Display, fgDisplay.RootWindow,
window->Window.VisualInfo->visual, AllocNone
);
mask = CWBackPixmap | CWBorderPixel | CWColormap | CWEventMask;
if( window->IsMenu || ( gameMode == GL_TRUE ) )
{
winAttr.override_redirect = True;
mask |= CWOverrideRedirect;
}
window->Window.Handle = XCreateWindow(
fgDisplay.Display,
window->Parent == NULL ? fgDisplay.RootWindow :
window->Parent->Window.Handle,
x, y, w, h, 0,
window->Window.VisualInfo->depth, InputOutput,
window->Window.VisualInfo->visual, mask,
&winAttr
);
/*
* The GLX context creation, possibly trying the direct context rendering
* or else use the current context if the user has so specified
*/
if( window->IsMenu )
{
/*
* If there isn't already an OpenGL rendering context for menu
* windows, make one
*/
if( !fgStructure.MenuContext )
{
fgStructure.MenuContext =
(SFG_MenuContext *)malloc( sizeof(SFG_MenuContext) );
fgStructure.MenuContext->VisualInfo = window->Window.VisualInfo;
fgStructure.MenuContext->Context = glXCreateContext(
fgDisplay.Display, fgStructure.MenuContext->VisualInfo,
NULL, ( fgState.DirectContext != GLUT_FORCE_INDIRECT_CONTEXT )
);
}
/* window->Window.Context = fgStructure.MenuContext->Context; */
window->Window.Context = glXCreateContext(
fgDisplay.Display, window->Window.VisualInfo,
NULL, ( fgState.DirectContext != GLUT_FORCE_INDIRECT_CONTEXT )
);
}
else if( fgState.UseCurrentContext )
{
window->Window.Context = glXGetCurrentContext( );
if( ! window->Window.Context )
window->Window.Context = glXCreateContext(
fgDisplay.Display, window->Window.VisualInfo,
NULL, ( fgState.DirectContext != GLUT_FORCE_INDIRECT_CONTEXT )
);
}
else
window->Window.Context = glXCreateContext(
fgDisplay.Display, window->Window.VisualInfo,
NULL, ( fgState.DirectContext != GLUT_FORCE_INDIRECT_CONTEXT )
);
#if !defined( __FreeBSD__ ) && !defined( __NetBSD__ )
if( !glXIsDirect( fgDisplay.Display, window->Window.Context ) )
{
if( fgState.DirectContext == GLUT_FORCE_DIRECT_CONTEXT )
fgError( "Unable to force direct context rendering for window '%s'",
title );
else if( fgState.DirectContext == GLUT_TRY_DIRECT_CONTEXT )
fgWarning( "Unable to create direct context rendering for window '%s'\nThis may hurt performance.",
title );
}
#endif
/*
* XXX Assume the new window is visible by default
* XXX Is this a safe assumption?
*/
window->State.Visible = GL_TRUE;
sizeHints.flags = 0;
if ( fgState.Position.Use )
sizeHints.flags |= USPosition;
if ( fgState.Size.Use )
sizeHints.flags |= USSize;
/*
* Fill in the size hints values now (the x, y, width and height
* settings are obsolete, are there any more WMs that support them?)
* Unless the X servers actually stop supporting these, we should
* continue to fill them in. It is *not* our place to tell the user
* that they should replace a window manager that they like, and which
* works, just because *we* think that it's not "modern" enough.
*/
sizeHints.x = x;
sizeHints.y = y;
sizeHints.width = w;
sizeHints.height = h;
wmHints.flags = StateHint;
wmHints.initial_state = fgState.ForceIconic ? IconicState : NormalState;
/* Prepare the window and iconified window names... */
XStringListToTextProperty( (char **) &title, 1, &textProperty );
XSetWMProperties(
fgDisplay.Display,
window->Window.Handle,
&textProperty,
&textProperty,
0,
0,
&sizeHints,
&wmHints,
NULL
);
XFree( textProperty.value );
XSetWMProtocols( fgDisplay.Display, window->Window.Handle,
&fgDisplay.DeleteWindow, 1 );
glXMakeCurrent(
fgDisplay.Display,
window->Window.Handle,
window->Window.Context
);
XMapWindow( fgDisplay.Display, window->Window.Handle );
#elif TARGET_HOST_WIN32 || TARGET_HOST_WINCE
WNDCLASS wc;
DWORD flags;
DWORD exFlags = 0;
ATOM atom;
/* Grab the window class we have registered on glutInit(): */
atom = GetClassInfo( fgDisplay.Instance, _T("FREEGLUT"), &wc );
FREEGLUT_INTERNAL_ERROR_EXIT ( atom, "Window Class Info Not Found",
"fgOpenWindow" );
if( gameMode )
{
FREEGLUT_INTERNAL_ERROR_EXIT ( window->Parent == NULL,
"Game mode being invoked on a subwindow",
"fgOpenWindow" );
/*
* Set the window creation flags appropriately to make the window
* entirely visible:
*/
flags = WS_POPUP | WS_CLIPSIBLINGS | WS_CLIPCHILDREN | WS_VISIBLE;
}
else
{
#if !TARGET_HOST_WINCE
if ( ( ! isSubWindow ) && ( ! window->IsMenu ) )
{
/*
* Update the window dimensions, taking account of window
* decorations. "freeglut" is to create the window with the
* outside of its border at (x,y) and with dimensions (w,h).
*/
w += (GetSystemMetrics( SM_CXSIZEFRAME ) )*2;
h += (GetSystemMetrics( SM_CYSIZEFRAME ) )*2 +
GetSystemMetrics( SM_CYCAPTION );
}
#endif /* TARGET_HOST_WINCE */
if( ! fgState.Position.Use )
{
x = CW_USEDEFAULT;
y = CW_USEDEFAULT;
}
if( ! fgState.Size.Use )
{
w = CW_USEDEFAULT;
h = CW_USEDEFAULT;
}
/*
* There's a small difference between creating the top, child and
* game mode windows
*/
flags = WS_CLIPSIBLINGS | WS_CLIPCHILDREN | WS_VISIBLE;
if ( window->IsMenu )
{
flags |= WS_POPUP;
exFlags |= WS_EX_TOOLWINDOW;
}
#if !TARGET_HOST_WINCE
else if( window->Parent == NULL )
flags |= WS_OVERLAPPEDWINDOW;
#endif
else
flags |= WS_CHILD;
}
#if TARGET_HOST_WINCE
{
wchar_t* wstr = fghWstrFromStr(title);
window->Window.Handle = CreateWindow(
_T("FREEGLUT"),
wstr,
WS_VISIBLE | WS_POPUP,
0,0, 240,320,
NULL,
NULL,
fgDisplay.Instance,
(LPVOID) window
);
free(wstr);
SHFullScreen(window->Window.Handle, SHFS_HIDESTARTICON);
SHFullScreen(window->Window.Handle, SHFS_HIDESIPBUTTON);
SHFullScreen(window->Window.Handle, SHFS_HIDETASKBAR);
MoveWindow(window->Window.Handle, 0, 0, 240, 320, TRUE);
ShowWindow(window->Window.Handle, SW_SHOW);
UpdateWindow(window->Window.Handle);
}
#else
window->Window.Handle = CreateWindowExA(
exFlags,
"FREEGLUT",
title,
flags,
x, y, w, h,
(HWND) window->Parent == NULL ? NULL : window->Parent->Window.Handle,
(HMENU) NULL,
fgDisplay.Instance,
(LPVOID) window
);
#endif /* TARGET_HOST_WINCE */
if( !( window->Window.Handle ) )
fgError( "Failed to create a window (%s)!", title );
#if TARGET_HOST_WINCE
ShowWindow( window->Window.Handle, SW_SHOW );
#else
ShowWindow( window->Window.Handle,
fgState.ForceIconic ? SW_SHOWMINIMIZED : SW_SHOW );
#endif /* TARGET_HOST_WINCE */
UpdateWindow( window->Window.Handle );
ShowCursor( TRUE ); /* XXX Old comments say "hide cursor"! */
#endif
fgSetWindow( window );
window->Window.DoubleBuffered =
( fgState.DisplayMode & GLUT_DOUBLE ) ? 1 : 0;
if ( ! window->Window.DoubleBuffered )
{
glDrawBuffer ( GL_FRONT );
glReadBuffer ( GL_FRONT );
}
}
/*
* General settings query method
*/
int FGAPIENTRY glutGet( GLenum eWhat )
{
#if TARGET_HOST_WIN32 || TARGET_HOST_WINCE
int returnValue ;
GLboolean boolValue ;
#endif
switch (eWhat)
{
case GLUT_INIT_STATE:
return fgState.Initialised;
case GLUT_ELAPSED_TIME:
return fgElapsedTime();
}
FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutGet" );
/* XXX In chronological code add order. (WHY in that order?) */
switch( eWhat )
{
/* Following values are stored in fgState and fgDisplay global structures */
case GLUT_SCREEN_WIDTH: return fgDisplay.ScreenWidth ;
case GLUT_SCREEN_HEIGHT: return fgDisplay.ScreenHeight ;
case GLUT_SCREEN_WIDTH_MM: return fgDisplay.ScreenWidthMM ;
case GLUT_SCREEN_HEIGHT_MM: return fgDisplay.ScreenHeightMM;
case GLUT_INIT_WINDOW_X: return fgState.Position.X ;
case GLUT_INIT_WINDOW_Y: return fgState.Position.Y ;
case GLUT_INIT_WINDOW_WIDTH: return fgState.Size.X ;
case GLUT_INIT_WINDOW_HEIGHT: return fgState.Size.Y ;
case GLUT_INIT_DISPLAY_MODE: return fgState.DisplayMode ;
/*
* The window/context specific queries are handled mostly by
* fghGetConfig().
*/
case GLUT_WINDOW_NUM_SAMPLES:
/* XXX Multisampling. Return what I know about multisampling. */
return 0;
#if TARGET_HOST_UNIX_X11
/*
* The rest of GLX queries under X are general enough to use a macro to
* check them
*/
# define GLX_QUERY(a,b) case a: return fghGetConfig( b );
GLX_QUERY( GLUT_WINDOW_RGBA, GLX_RGBA );
GLX_QUERY( GLUT_WINDOW_DOUBLEBUFFER, GLX_DOUBLEBUFFER );
GLX_QUERY( GLUT_WINDOW_BUFFER_SIZE, GLX_BUFFER_SIZE );
GLX_QUERY( GLUT_WINDOW_STENCIL_SIZE, GLX_STENCIL_SIZE );
GLX_QUERY( GLUT_WINDOW_DEPTH_SIZE, GLX_DEPTH_SIZE );
GLX_QUERY( GLUT_WINDOW_RED_SIZE, GLX_RED_SIZE );
GLX_QUERY( GLUT_WINDOW_GREEN_SIZE, GLX_GREEN_SIZE );
GLX_QUERY( GLUT_WINDOW_BLUE_SIZE, GLX_BLUE_SIZE );
GLX_QUERY( GLUT_WINDOW_ALPHA_SIZE, GLX_ALPHA_SIZE );
GLX_QUERY( GLUT_WINDOW_ACCUM_RED_SIZE, GLX_ACCUM_RED_SIZE );
GLX_QUERY( GLUT_WINDOW_ACCUM_GREEN_SIZE, GLX_ACCUM_GREEN_SIZE );
GLX_QUERY( GLUT_WINDOW_ACCUM_BLUE_SIZE, GLX_ACCUM_BLUE_SIZE );
GLX_QUERY( GLUT_WINDOW_ACCUM_ALPHA_SIZE, GLX_ACCUM_ALPHA_SIZE );
GLX_QUERY( GLUT_WINDOW_STEREO, GLX_STEREO );
# undef GLX_QUERY
/* Colormap size is handled in a bit different way than all the rest */
case GLUT_WINDOW_COLORMAP_SIZE:
if( (fghGetConfig( GLX_RGBA )) || (fgStructure.CurrentWindow == NULL) )
{
/*
* We've got a RGBA visual, so there is no colormap at all.
* The other possibility is that we have no current window set.
*/
return 0;
}
return fgStructure.CurrentWindow->Window.VisualInfo->visual->map_entries;
/*
* Those calls are somewhat similiar, as they use XGetWindowAttributes()
* function
*/
case GLUT_WINDOW_X:
case GLUT_WINDOW_Y:
case GLUT_WINDOW_BORDER_WIDTH:
case GLUT_WINDOW_HEADER_HEIGHT:
{
int x, y;
Window w;
if( fgStructure.CurrentWindow == NULL )
return 0;
XTranslateCoordinates(
fgDisplay.Display,
fgStructure.CurrentWindow->Window.Handle,
fgDisplay.RootWindow,
0, 0, &x, &y, &w);
switch ( eWhat )
{
case GLUT_WINDOW_X: return x;
case GLUT_WINDOW_Y: return y;
}
if ( w == 0 )
return 0;
XTranslateCoordinates(
fgDisplay.Display,
fgStructure.CurrentWindow->Window.Handle,
w, 0, 0, &x, &y, &w);
switch ( eWhat )
{
case GLUT_WINDOW_BORDER_WIDTH: return x;
case GLUT_WINDOW_HEADER_HEIGHT: return y;
}
}
case GLUT_WINDOW_WIDTH:
case GLUT_WINDOW_HEIGHT:
{
XWindowAttributes winAttributes;
if( fgStructure.CurrentWindow == NULL )
return 0;
XGetWindowAttributes(
fgDisplay.Display,
fgStructure.CurrentWindow->Window.Handle,
&winAttributes
);
switch ( eWhat )
{
case GLUT_WINDOW_WIDTH: return winAttributes.width ;
case GLUT_WINDOW_HEIGHT: return winAttributes.height ;
}
}
/* I do not know yet if there will be a fgChooseVisual() function for Win32 */
case GLUT_DISPLAY_MODE_POSSIBLE:
return( fgChooseVisual() == NULL ? 0 : 1 );
/* This is system-dependant */
case GLUT_WINDOW_FORMAT_ID:
if( fgStructure.CurrentWindow == NULL )
return 0;
return fgStructure.CurrentWindow->Window.VisualInfo->visualid;
#elif TARGET_HOST_WIN32 || TARGET_HOST_WINCE
/* Handle the OpenGL inquiries */
case GLUT_WINDOW_RGBA:
glGetBooleanv ( GL_RGBA_MODE, &boolValue );
returnValue = boolValue ? 1 : 0;
return returnValue;
case GLUT_WINDOW_DOUBLEBUFFER:
glGetBooleanv ( GL_DOUBLEBUFFER, &boolValue );
returnValue = boolValue ? 1 : 0;
return returnValue;
case GLUT_WINDOW_STEREO:
glGetBooleanv ( GL_STEREO, &boolValue );
returnValue = boolValue ? 1 : 0;
return returnValue;
case GLUT_WINDOW_RED_SIZE:
glGetIntegerv ( GL_RED_BITS, &returnValue );
return returnValue;
case GLUT_WINDOW_GREEN_SIZE:
glGetIntegerv ( GL_GREEN_BITS, &returnValue );
return returnValue;
case GLUT_WINDOW_BLUE_SIZE:
glGetIntegerv ( GL_BLUE_BITS, &returnValue );
return returnValue;
case GLUT_WINDOW_ALPHA_SIZE:
glGetIntegerv ( GL_ALPHA_BITS, &returnValue );
return returnValue;
case GLUT_WINDOW_ACCUM_RED_SIZE:
glGetIntegerv ( GL_ACCUM_RED_BITS, &returnValue );
return returnValue;
case GLUT_WINDOW_ACCUM_GREEN_SIZE:
glGetIntegerv ( GL_ACCUM_GREEN_BITS, &returnValue );
return returnValue;
case GLUT_WINDOW_ACCUM_BLUE_SIZE:
glGetIntegerv ( GL_ACCUM_BLUE_BITS, &returnValue );
return returnValue;
case GLUT_WINDOW_ACCUM_ALPHA_SIZE:
glGetIntegerv ( GL_ACCUM_ALPHA_BITS, &returnValue );
return returnValue;
case GLUT_WINDOW_DEPTH_SIZE:
glGetIntegerv ( GL_DEPTH_BITS, &returnValue );
return returnValue;
case GLUT_WINDOW_BUFFER_SIZE:
returnValue = 1 ; /* ????? */
return returnValue;
case GLUT_WINDOW_STENCIL_SIZE:
returnValue = 0 ; /* ????? */
return returnValue;
case GLUT_WINDOW_X:
case GLUT_WINDOW_Y:
case GLUT_WINDOW_WIDTH:
case GLUT_WINDOW_HEIGHT:
{
/*
* There is considerable confusion about the "right thing to
* do" concerning window size and position. GLUT itself is
* not consistent between Windows and UNIX/X11; since
* platform independence is a virtue for "freeglut", we
* decided to break with GLUT's behaviour.
*
* Under UNIX/X11, it is apparently not possible to get the
* window border sizes in order to subtract them off the
* window's initial position until some time after the window
* has been created. Therefore we decided on the following
* behaviour, both under Windows and under UNIX/X11:
* - When you create a window with position (x,y) and size
* (w,h), the upper left hand corner of the outside of the
* window is at (x,y) and the size of the drawable area is
* (w,h).
* - When you query the size and position of the window--as
* is happening here for Windows--"freeglut" will return
* the size of the drawable area--the (w,h) that you
* specified when you created the window--and the coordinates
* of the upper left hand corner of the drawable
* area--which is NOT the (x,y) you specified.
*/
RECT winRect;
freeglut_return_val_if_fail( fgStructure.CurrentWindow != NULL, 0 );
/*
* We need to call GetWindowRect() first...
* (this returns the pixel coordinates of the outside of the window)
*/
GetWindowRect( fgStructure.CurrentWindow->Window.Handle, &winRect );
/* ...then we've got to correct the results we've just received... */
#if !TARGET_HOST_WINCE
if ( ( fgStructure.GameMode != fgStructure.CurrentWindow ) && ( fgStructure.CurrentWindow->Parent == NULL ) &&
( ! fgStructure.CurrentWindow->IsMenu ) )
{
winRect.left += GetSystemMetrics( SM_CXSIZEFRAME );
winRect.right -= GetSystemMetrics( SM_CXSIZEFRAME );
winRect.top += GetSystemMetrics( SM_CYSIZEFRAME ) + GetSystemMetrics( SM_CYCAPTION );
winRect.bottom -= GetSystemMetrics( SM_CYSIZEFRAME );
}
#endif /* !TARGET_HOST_WINCE */
switch( eWhat )
{
case GLUT_WINDOW_X: return winRect.left ;
case GLUT_WINDOW_Y: return winRect.top ;
case GLUT_WINDOW_WIDTH: return winRect.right - winRect.left;
case GLUT_WINDOW_HEIGHT: return winRect.bottom - winRect.top;
}
}
break;
case GLUT_WINDOW_BORDER_WIDTH :
#if TARGET_HOST_WINCE
return 0;
#else
return GetSystemMetrics( SM_CXSIZEFRAME );
#endif /* !TARGET_HOST_WINCE */
case GLUT_WINDOW_HEADER_HEIGHT :
#if TARGET_HOST_WINCE
return 0;
#else
return GetSystemMetrics( SM_CYCAPTION );
#endif /* TARGET_HOST_WINCE */
case GLUT_DISPLAY_MODE_POSSIBLE:
#if TARGET_HOST_WINCE
return GL_FALSE;
#else
return fgSetupPixelFormat( fgStructure.CurrentWindow, GL_TRUE,
PFD_MAIN_PLANE );
#endif /* TARGET_HOST_WINCE */
case GLUT_WINDOW_FORMAT_ID:
#if !TARGET_HOST_WINCE
if( fgStructure.CurrentWindow != NULL )
return GetPixelFormat( fgStructure.CurrentWindow->Window.Device );
#endif /* TARGET_HOST_WINCE */
return 0;
#endif
/* The window structure queries */
case GLUT_WINDOW_PARENT:
if( fgStructure.CurrentWindow == NULL ) return 0;
if( fgStructure.CurrentWindow->Parent == NULL ) return 0;
return fgStructure.CurrentWindow->Parent->ID;
case GLUT_WINDOW_NUM_CHILDREN:
if( fgStructure.CurrentWindow == NULL )
return 0;
return fgListLength( &fgStructure.CurrentWindow->Children );
case GLUT_WINDOW_CURSOR:
if( fgStructure.CurrentWindow == NULL )
return 0;
return fgStructure.CurrentWindow->State.Cursor;
case GLUT_MENU_NUM_ITEMS:
if( fgStructure.CurrentMenu == NULL )
return 0;
return fgListLength( &fgStructure.CurrentMenu->Entries );
case GLUT_ACTION_ON_WINDOW_CLOSE:
return fgState.ActionOnWindowClose;
case GLUT_VERSION :
return VERSION_MAJOR * 10000 + VERSION_MINOR * 100 + VERSION_PATCH;
case GLUT_RENDERING_CONTEXT:
return fgState.UseCurrentContext ? GLUT_USE_CURRENT_CONTEXT
: GLUT_CREATE_NEW_CONTEXT;
case GLUT_DIRECT_RENDERING:
return fgState.DirectContext;
break;
default:
fgWarning( "glutGet(): missing enum handle %d", eWhat );
break;
}
return -1;
}
