/*
* General settings query method
*/
int FGAPIENTRY glutGet( GLenum eWhat )
{
#if TARGET_HOST_MS_WINDOWS
int returnValue ;
GLboolean boolValue ;
#endif
int nsamples = 0;
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.Use ?
fgState.Position.X : -1 ;
case GLUT_INIT_WINDOW_Y: return fgState.Position.Use ?
fgState.Position.Y : -1 ;
case GLUT_INIT_WINDOW_WIDTH: return fgState.Size.Use ?
fgState.Size.X : -1 ;
case GLUT_INIT_WINDOW_HEIGHT: return fgState.Size.Use ?
fgState.Size.Y : -1 ;
case GLUT_INIT_DISPLAY_MODE: return fgState.DisplayMode ;
case GLUT_INIT_MAJOR_VERSION: return fgState.MajorVersion ;
case GLUT_INIT_MINOR_VERSION: return fgState.MinorVersion ;
case GLUT_INIT_FLAGS: return fgState.ContextFlags ;
case GLUT_INIT_PROFILE: return fgState.ContextProfile ;
#if TARGET_HOST_POSIX_X11
/*
* The window/context specific queries are handled mostly by
* fghGetConfig().
*/
case GLUT_WINDOW_NUM_SAMPLES:
#ifdef GLX_VERSION_1_3
glGetIntegerv(GL_SAMPLES, &nsamples);
#endif
return nsamples;
/*
* 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;
}
else
{
const GLXFBConfig * fbconfig =
fgStructure.CurrentWindow->Window.FBConfig;
XVisualInfo * visualInfo =
glXGetVisualFromFBConfig( fgDisplay.Display, *fbconfig );
const int result = visualInfo->visual->map_entries;
XFree(visualInfo);
return result;
}
/*
* 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:
{
/* We should not have to call fgChooseFBConfig again here. */
GLXFBConfig * fbconfig;
int isPossible;
fbconfig = fgChooseFBConfig();
if (fbconfig == NULL)
{
isPossible = 0;
}
else
{
isPossible = 1;
XFree(fbconfig);
}
return isPossible;
}
/* This is system-dependant */
case GLUT_WINDOW_FORMAT_ID:
if( fgStructure.CurrentWindow == NULL )
return 0;
return fghGetConfig( GLX_VISUAL_ID );
#elif TARGET_HOST_MS_WINDOWS
case GLUT_WINDOW_NUM_SAMPLES:
glGetIntegerv(WGL_SAMPLES_ARB, &nsamples);
return nsamples;
/* Handle the OpenGL inquiries */
case GLUT_WINDOW_RGBA:
#if defined(_WIN32_WCE)
boolValue = (GLboolean)0; /* WinCE doesn't support this feature */
#else
glGetBooleanv ( GL_RGBA_MODE, &boolValue );
returnValue = boolValue ? 1 : 0;
#endif
return returnValue;
case GLUT_WINDOW_DOUBLEBUFFER:
#if defined(_WIN32_WCE)
boolValue = (GLboolean)0; /* WinCE doesn't support this feature */
#else
glGetBooleanv ( GL_DOUBLEBUFFER, &boolValue );
returnValue = boolValue ? 1 : 0;
#endif
return returnValue;
case GLUT_WINDOW_STEREO:
#if defined(_WIN32_WCE)
boolValue = (GLboolean)0; /* WinCE doesn't support this feature */
#else
glGetBooleanv ( GL_STEREO, &boolValue );
returnValue = boolValue ? 1 : 0;
#endif
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:
#if defined(_WIN32_WCE)
returnValue = 0; /* WinCE doesn't support this feature */
#else
glGetIntegerv ( GL_ACCUM_RED_BITS, &returnValue );
#endif
return returnValue;
case GLUT_WINDOW_ACCUM_GREEN_SIZE:
#if defined(_WIN32_WCE)
returnValue = 0; /* WinCE doesn't support this feature */
#else
glGetIntegerv ( GL_ACCUM_GREEN_BITS, &returnValue );
#endif
return returnValue;
case GLUT_WINDOW_ACCUM_BLUE_SIZE:
#if defined(_WIN32_WCE)
returnValue = 0; /* WinCE doesn't support this feature */
#else
glGetIntegerv ( GL_ACCUM_BLUE_BITS, &returnValue );
#endif
return returnValue;
case GLUT_WINDOW_ACCUM_ALPHA_SIZE:
#if defined(_WIN32_WCE)
returnValue = 0; /* WinCE doesn't support this feature */
#else
glGetIntegerv ( GL_ACCUM_ALPHA_BITS, &returnValue );
#endif
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 !defined(_WIN32_WCE)
if ( ( fgStructure.GameModeWindow != 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 /* !defined(_WIN32_WCE) */
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 defined(_WIN32_WCE)
return 0;
#else
return GetSystemMetrics( SM_CXSIZEFRAME );
#endif /* !defined(_WIN32_WCE) */
case GLUT_WINDOW_HEADER_HEIGHT :
#if defined(_WIN32_WCE)
return 0;
#else
return GetSystemMetrics( SM_CYCAPTION );
#endif /* defined(_WIN32_WCE) */
case GLUT_DISPLAY_MODE_POSSIBLE:
#if defined(_WIN32_WCE)
return 0;
#else
return fgSetupPixelFormat( fgStructure.CurrentWindow, GL_TRUE,
PFD_MAIN_PLANE );
#endif /* defined(_WIN32_WCE) */
case GLUT_WINDOW_FORMAT_ID:
#if !defined(_WIN32_WCE)
if( fgStructure.CurrentWindow != NULL )
return GetPixelFormat( fgStructure.CurrentWindow->Window.Device );
#endif /* defined(_WIN32_WCE) */
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;
case GLUT_FULL_SCREEN:
return fghCheckFullScreen();
case GLUT_AUX:
return fgState.AuxiliaryBufferNumber;
case GLUT_MULTISAMPLE:
return fgState.SampleNumber;
default:
fgWarning( "glutGet(): missing enum handle %d", eWhat );
break;
}
return -1;
}
/*
* General settings query method
*/
int FGAPIENTRY glutGet( GLenum eWhat )
{
#if TARGET_HOST_MS_WINDOWS
int returnValue ;
GLboolean boolValue ;
#endif
int nsamples = 0;
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.Use ?
fgState.Position.X : -1 ;
case GLUT_INIT_WINDOW_Y: return fgState.Position.Use ?
fgState.Position.Y : -1 ;
case GLUT_INIT_WINDOW_WIDTH: return fgState.Size.Use ?
fgState.Size.X : -1 ;
case GLUT_INIT_WINDOW_HEIGHT: return fgState.Size.Use ?
fgState.Size.Y : -1 ;
case GLUT_INIT_DISPLAY_MODE: return fgState.DisplayMode ;
case GLUT_INIT_MAJOR_VERSION: return fgState.MajorVersion ;
case GLUT_INIT_MINOR_VERSION: return fgState.MinorVersion ;
case GLUT_INIT_FLAGS: return fgState.ContextFlags ;
case GLUT_INIT_PROFILE: return fgState.ContextProfile ;
#if TARGET_HOST_POSIX_X11
/*
* The window/context specific queries are handled mostly by
* fghGetConfig().
*/
case GLUT_WINDOW_NUM_SAMPLES:
#ifdef GLX_VERSION_1_3
glGetIntegerv(GL_SAMPLES, &nsamples);
#endif
return nsamples;
/*
* 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;
}
else
{
const GLXFBConfig * fbconfig =
fgStructure.CurrentWindow->Window.FBConfig;
XVisualInfo * visualInfo =
glXGetVisualFromFBConfig( fgDisplay.Display, *fbconfig );
const int result = visualInfo->visual->map_entries;
XFree(visualInfo);
return result;
}
/*
* 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:
{
/* We should not have to call fgChooseFBConfig again here. */
GLXFBConfig * fbconfig;
int isPossible;
fbconfig = fgChooseFBConfig(NULL);
if (fbconfig == NULL)
{
isPossible = 0;
}
else
{
isPossible = 1;
XFree(fbconfig);
}
return isPossible;
}
/* This is system-dependant */
case GLUT_WINDOW_FORMAT_ID:
if( fgStructure.CurrentWindow == NULL )
return 0;
return fghGetConfig( GLX_VISUAL_ID );
#elif TARGET_HOST_MS_WINDOWS
case GLUT_WINDOW_NUM_SAMPLES:
glGetIntegerv(WGL_SAMPLES_ARB, &nsamples);
return nsamples;
/* Handle the OpenGL inquiries */
case GLUT_WINDOW_RGBA:
#if defined(_WIN32_WCE)
boolValue = (GLboolean)0; /* WinCE doesn't support this feature */
#else
glGetBooleanv ( GL_RGBA_MODE, &boolValue );
returnValue = boolValue ? 1 : 0;
#endif
return returnValue;
case GLUT_WINDOW_DOUBLEBUFFER:
#if defined(_WIN32_WCE)
boolValue = (GLboolean)0; /* WinCE doesn't support this feature */
#else
glGetBooleanv ( GL_DOUBLEBUFFER, &boolValue );
returnValue = boolValue ? 1 : 0;
#endif
return returnValue;
case GLUT_WINDOW_STEREO:
#if defined(_WIN32_WCE)
boolValue = (GLboolean)0; /* WinCE doesn't support this feature */
#else
glGetBooleanv ( GL_STEREO, &boolValue );
returnValue = boolValue ? 1 : 0;
#endif
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:
#if defined(_WIN32_WCE)
returnValue = 0; /* WinCE doesn't support this feature */
#else
glGetIntegerv ( GL_ACCUM_RED_BITS, &returnValue );
#endif
return returnValue;
case GLUT_WINDOW_ACCUM_GREEN_SIZE:
#if defined(_WIN32_WCE)
returnValue = 0; /* WinCE doesn't support this feature */
#else
glGetIntegerv ( GL_ACCUM_GREEN_BITS, &returnValue );
#endif
return returnValue;
case GLUT_WINDOW_ACCUM_BLUE_SIZE:
#if defined(_WIN32_WCE)
returnValue = 0; /* WinCE doesn't support this feature */
#else
glGetIntegerv ( GL_ACCUM_BLUE_BITS, &returnValue );
#endif
return returnValue;
case GLUT_WINDOW_ACCUM_ALPHA_SIZE:
#if defined(_WIN32_WCE)
returnValue = 0; /* WinCE doesn't support this feature */
#else
glGetIntegerv ( GL_ACCUM_ALPHA_BITS, &returnValue );
#endif
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 );
#if defined(_WIN32_WCE)
GetWindowRect( fgStructure.CurrentWindow->Window.Handle, &winRect );
#else
fghGetClientArea(&winRect,fgStructure.CurrentWindow, FALSE);
if (fgStructure.CurrentWindow->Parent && (eWhat==GLUT_WINDOW_X || eWhat==GLUT_WINDOW_Y))
{
/* For child window, we should return relative to upper-left
* of parent's client area.
*/
POINT topleft;
topleft.x = winRect.left;
topleft.y = winRect.top;
ScreenToClient(fgStructure.CurrentWindow->Parent->Window.Handle,&topleft);
winRect.left = topleft.x;
winRect.top = topleft.y;
}
#endif /* defined(_WIN32_WCE) */
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 :
case GLUT_WINDOW_BORDER_HEIGHT :
#if defined(_WIN32_WCE)
return 0;
#else
{
/* We can't get the border width or header height in the simple way
* with some calls to GetSystemMetrics. We'd then have to assume which
* elements are present for a given decoration, and such calculations
* wouldn't be valid for every version of Windows. The below should be
* robust. */
int borderWidth, captionHeight;
DWORD windowStyle, windowExStyle;
RECT clientRect, winRect;
/* Get style of window, or default style */
fghGetStyleFromWindow( fgStructure.CurrentWindow, &windowStyle, &windowExStyle );
/* Get client area if any window */
if (fgStructure.CurrentWindow && fgStructure.CurrentWindow->Window.Handle)
fghGetClientArea(&clientRect,fgStructure.CurrentWindow,FALSE);
else
SetRect(&clientRect,0,0,200,200);
/* Compute window rect (including non-client area) */
CopyRect(&winRect,&clientRect);
fghComputeWindowRectFromClientArea_UseStyle(&winRect,windowStyle,windowExStyle,FALSE);
/* Calculate border width by taking width of whole window minus width of client area and divide by two
* NB: we assume horizontal and vertical borders have the same size, which should always be the case
* unless the user bypassed FreeGLUT and messed with the windowstyle himself.
* Once borderwidth is known, account for it when comparing height of window to height of client area.
* all other extra pixels are assumed to be atop the window, forming the caption.
*/
borderWidth = ((winRect.right-winRect.left)-(clientRect.right-clientRect.left))/2;
captionHeight = (winRect.bottom-winRect.top)-(clientRect.bottom-clientRect.top)-borderWidth*2;
switch( eWhat )
{
case GLUT_WINDOW_BORDER_WIDTH:
return borderWidth;
case GLUT_WINDOW_BORDER_HEIGHT:
return captionHeight;
}
}
#endif /* defined(_WIN32_WCE) */
case GLUT_DISPLAY_MODE_POSSIBLE:
#if defined(_WIN32_WCE)
return 0;
#else
return fgSetupPixelFormat( fgStructure.CurrentWindow, GL_TRUE,
PFD_MAIN_PLANE );
#endif /* defined(_WIN32_WCE) */
case GLUT_WINDOW_FORMAT_ID:
#if !defined(_WIN32_WCE)
if( fgStructure.CurrentWindow != NULL )
return GetPixelFormat( fgStructure.CurrentWindow->Window.Device );
#endif /* defined(_WIN32_WCE) */
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;
case GLUT_FULL_SCREEN:
return fgStructure.CurrentWindow->State.IsFullscreen;
case GLUT_AUX:
return fgState.AuxiliaryBufferNumber;
case GLUT_MULTISAMPLE:
return fgState.SampleNumber;
case GLUT_SKIP_STALE_MOTION_EVENTS:
return fgState.SkipStaleMotion;
default:
fgWarning( "glutGet(): missing enum handle %d", eWhat );
break;
}
return -1;
}