/*
* freeglut_state.c
*
* Adapted from the FreeGLUT library by Hans de Ruiter.
* The FreeGLUT license holds for this file.
*
* Freeglut state query methods.
*
* Copyright (c) 1999-2000 Pawel W. Olszta. All Rights Reserved.
* Written by Pawel W. Olszta, <olszta@sourceforge.net>
* Creation date: Thu Dec 16 1999
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
* PAWEL W. OLSZTA BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/

#include <GL/glut.h>
#include <proto/timer.h>
#include <devices/timer.h>
#include "glut_internal.h"

extern struct TimerIFace *__ITimer;

/*
* TODO BEFORE THE STABLE RELEASE:
*
*  glutGet()               -- X11 tests passed, but check if all enums
*                             handled (what about Win32?)
*  glutDeviceGet()         -- X11 tests passed, but check if all enums
*                             handled (what about Win32?)
*  glutGetModifiers()      -- OK, but could also remove the limitation
*  glutLayerGet()          -- what about GLUT_NORMAL_DAMAGED?
*
* The fail-on-call policy will help adding the most needed things imho.
*/

/* -- LOCAL DEFINITIONS ---------------------------------------------------- */

/* -- PRIVATE FUNCTIONS ---------------------------------------------------- */

#if TARGET_HOST_UNIX_X11
/*
* Queries the GL context about some attributes
*/
static int fghGetConfig( int attribute )
{
	int returnValue = 0;

	if( fgStructure.CurrentWindow )
			glXGetConfig( fgDisplay.Display, fgStructure.CurrentWindow->Window.VisualInfo,
										attribute, &returnValue );

	return returnValue;
}
#endif

/* -- INTERFACE FUNCTIONS -------------------------------------------------- */

/*
* General settings assignment method
*/
void glut_GLUTSetOption(struct GlutIFace *Self, GLenum eWhat, int value)
{
	GLUTcontext ctx = (GLUTcontext)GET_INSTANCE(Self);
	FREEGLUT_EXIT_IF_NOT_INITIALISED_NR ( "glutSetOption" );

		/*
		* XXX In chronological code add order.  (WHY in that order?)
		*/
	switch( eWhat ) {
		case GLUT_INIT_WINDOW_X:
			ctx->__glutWindowX = (GLint)value;
			break;

		case GLUT_INIT_WINDOW_Y:
			ctx->__glutWindowY = (GLint)value;
			break;

		case GLUT_INIT_WINDOW_WIDTH:
			ctx->__glutWindowWidth = (GLint)value;
			break;

		case GLUT_INIT_WINDOW_HEIGHT:
			ctx->__glutWindowHeight = (GLint)value;
			break;

		case GLUT_INIT_DISPLAY_MODE:
			ctx->__glutDisplayMode = (unsigned int)value;
			break;

		case GLUT_ACTION_ON_WINDOW_CLOSE:
			ctx->actionOnWindowClose = value;
			break;

		case GLUT_RENDERING_CONTEXT:
			ctx->useCurrentContext =
				( value == GLUT_USE_CURRENT_CONTEXT ) ? GL_TRUE : GL_FALSE;
			break;

#ifndef __amigaos4__ // #### NOT SUPPORTED YET ####
		case GLUT_DIRECT_RENDERING:
			fgState.DirectContext = value;
			break;

		case GLUT_WINDOW_CURSOR:
			if( fgStructure.CurrentWindow != NULL ) {
				fgStructure.CurrentWindow->State.Cursor = value;
			}
			break;
#endif
		default:
			dprintf( "glutSetOption(): missing enum handle %d", eWhat );
			break;
		}
}

/*
* General settings query method
*/
int glut_GLUTGet(struct GlutIFace *Self, GLenum eWhat )
{
	GLUTcontext ctx = (GLUTcontext)GET_INSTANCE(Self);

#if TARGET_HOST_WIN32 || TARGET_HOST_WINCE
	int returnValue ;
	GLboolean boolValue ;
#endif

	switch (eWhat) {
		case GLUT_INIT_STATE:
			return (ctx->__glutContext ? GL_TRUE : GL_FALSE);

		case GLUT_ELAPSED_TIME: {
			struct TimeVal now;
			__ITimer->GetSysTime(&now);
			__ITimer->SubTime(&now, &ctx->__glutStartTime);
			return 1000 * now.Seconds + now.Microseconds/1000;
			break;
		}

		case GLUT_INIT_WINDOW_X:        return ctx->__glutWindowX;
		case GLUT_INIT_WINDOW_Y:        return ctx->__glutWindowY;
		case GLUT_INIT_WINDOW_WIDTH:    return ctx->__glutWindowWidth;
		case GLUT_INIT_WINDOW_HEIGHT:   return ctx->__glutWindowHeight;
		case GLUT_INIT_DISPLAY_MODE:    return ctx->__glutDisplayMode;
		default:
			break;
	}

		FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutGet" );

		/* XXX In chronological code add order.  (WHY in that order?) */
		switch( eWhat ) {
	/** ##### FIXME! ##### Not implemented yet
	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;    */


		/*
		* 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;
			break;
		/*
		* 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;
			}
			break;
		}

		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 ;
			}
			break;
		}

		/* I do not know yet if there will be a fgChooseVisual() function for Win32 */
		case GLUT_DISPLAY_MODE_POSSIBLE:
			return( fgChooseVisual() == NULL ? 0 : 1 );
			break;

		/* This is system-dependant */
		case GLUT_WINDOW_FORMAT_ID:
			if( fgStructure.CurrentWindow == NULL ) {
				return 0;
			}
			return fgStructure.CurrentWindow->Window.VisualInfo->visualid;
			break;

#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;
			break;

		case GLUT_WINDOW_DOUBLEBUFFER:
			glGetBooleanv ( GL_DOUBLEBUFFER, &boolValue );
			returnValue = boolValue ? 1 : 0;
			return returnValue;
			break;

		case GLUT_WINDOW_STEREO:
			glGetBooleanv ( GL_STEREO, &boolValue );
			returnValue = boolValue ? 1 : 0;
			return returnValue;
			break;

		case GLUT_WINDOW_RED_SIZE:
			glGetIntegerv ( GL_RED_BITS, &returnValue );
			return returnValue;
			break;

		case GLUT_WINDOW_GREEN_SIZE:
			glGetIntegerv ( GL_GREEN_BITS, &returnValue );
			return returnValue;
			break;

		case GLUT_WINDOW_BLUE_SIZE:
			glGetIntegerv ( GL_BLUE_BITS, &returnValue );
			return returnValue;
			break;

		case GLUT_WINDOW_ALPHA_SIZE:
			glGetIntegerv ( GL_ALPHA_BITS, &returnValue );
			return returnValue;
			break;

		case GLUT_WINDOW_ACCUM_RED_SIZE:
			glGetIntegerv ( GL_ACCUM_RED_BITS, &returnValue );
			return returnValue;
			break;

		case GLUT_WINDOW_ACCUM_GREEN_SIZE:
			glGetIntegerv ( GL_ACCUM_GREEN_BITS, &returnValue );
			return returnValue;
			break;

		case GLUT_WINDOW_ACCUM_BLUE_SIZE:
			glGetIntegerv ( GL_ACCUM_BLUE_BITS, &returnValue );
			return returnValue;
			break;

		case GLUT_WINDOW_ACCUM_ALPHA_SIZE:
			glGetIntegerv ( GL_ACCUM_ALPHA_BITS, &returnValue );
			return returnValue;
			break;

		case GLUT_WINDOW_DEPTH_SIZE:
			glGetIntegerv ( GL_DEPTH_BITS, &returnValue );
			return returnValue;
			break;

		case GLUT_WINDOW_BUFFER_SIZE:
			returnValue = 1 ;                                      /* ????? */
			return returnValue;
			break;

		case GLUT_WINDOW_STENCIL_SIZE:
			returnValue = 0 ;                                      /* ????? */
			return returnValue;
			break;

		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 ctx->actionOnWindowClose;

		case GLUT_VERSION :
				return VERSION_MAJOR * 10000 + VERSION_MINOR * 100 + VERSION_PATCH;

		case GLUT_RENDERING_CONTEXT:
		return ctx->useCurrentContext ? GLUT_USE_CURRENT_CONTEXT
																				: GLUT_CREATE_NEW_CONTEXT;

#ifndef __amigaos4__ // Not supported
		case GLUT_DIRECT_RENDERING:
				return fgState.DirectContext;
				break;
#endif

		default:
				dprintf( "missing enum handle %d", eWhat );
				break;
		}
		return -1;
}

/*
* Returns various device information.
*/
int glut_GLUTDeviceGet(struct GlutIFace *Self, GLenum eWhat )
{
	GLUTcontext ctx = (GLUTcontext)GET_INSTANCE(Self);

		FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutDeviceGet" );

		/* XXX WARNING: we are mostly lying in this function. */
		switch( eWhat )
		{
		case GLUT_HAS_KEYBOARD:
				/*
				* We always have a keyboard present on PC machines...
				*
				* XXX I think that some of my PCs will boot without a keyboard.
				* XXX Also, who says that we are running on a PC?  UNIX/X11
				* XXX is much more generic, and X11 can go over a network.
				* XXX Though in actuality, we can probably assume BOTH a
				* XXX mouse and keyboard for most/all of our users.
				*/
				return TRUE ;

#if defined(TARGET_HOST_UNIX_X11) || defined(__amigaos4__)

		case GLUT_HAS_MOUSE:
				return TRUE ;

		case GLUT_NUM_MOUSE_BUTTONS:
				/*
				* Return the number of mouse buttons available. This is a big guess.
				*
				* XXX We can probe /var/run/dmesg.boot which is world-readable.
				* XXX This would be somewhat system-dependant, but is doable.
				* XXX E.g., on NetBSD, my USB mouse registers:
				* XXX   ums0 at uhidev0: 3 buttons and Z dir.
				* XXX We can also probe /var/log/XFree86\..*\.log to get
				* XXX lines such as:
				* XXX   (**) Option "Buttons" "5"
				* XXX   (**) Option "ZAxisMapping" "4 5"
				* XXX   (**) Mouse0: ZAxisMapping: buttons 4 and 5
				* XXX   (**) Mouse0: Buttons: 5
				* XXX ...which tells us even more, and is a bit less
				* XXX system-dependant.  (Other than MS-WINDOWS, all
				* XXX target hosts with actual users are probably running
				* XXX XFree86...)  It is at least worth taking a look at
				* XXX this file.
				*/
				return 3 ;

#elif TARGET_HOST_WIN32 || TARGET_HOST_WINCE

		case GLUT_HAS_MOUSE:
				/*
				* The Windows can be booted without a mouse.
				* It would be nice to have this reported.
				*/
				return GetSystemMetrics( SM_MOUSEPRESENT );

		case GLUT_NUM_MOUSE_BUTTONS:
				/* We are much more fortunate under Win32 about this... */
#if TARGET_HOST_WINCE
				return 1;
#else
				return GetSystemMetrics( SM_CMOUSEBUTTONS );
#endif /* TARGET_HOST_WINCE */

#endif
	// ##### FIXME! ##### no joystick support yet
		case GLUT_HAS_JOYSTICK:
		return GL_FALSE;//return fgJoystickDetect ();

		case GLUT_OWNS_JOYSTICK:
		return GL_FALSE;//return fgState.JoysticksInitialised;

		case GLUT_JOYSTICK_POLL_RATE:
		return 0;//return fgStructure.CurrentWindow ? fgStructure.CurrentWindow->State.JoystickPollRate : 0;

		/* XXX The following two are only for Joystick 0 but this is an improvement */
		case GLUT_JOYSTICK_BUTTONS:
		return 0;//return glutJoystickGetNumButtons ( 0 );

		case GLUT_JOYSTICK_AXES:
		return 0;//return glutJoystickGetNumAxes ( 0 );

		case GLUT_HAS_SPACEBALL:
		case GLUT_HAS_DIAL_AND_BUTTON_BOX:
		case GLUT_HAS_TABLET:
				return FALSE;

		case GLUT_NUM_SPACEBALL_BUTTONS:
		case GLUT_NUM_BUTTON_BOX_BUTTONS:
		case GLUT_NUM_DIALS:
		case GLUT_NUM_TABLET_BUTTONS:
				return 0;

		case GLUT_DEVICE_IGNORE_KEY_REPEAT:
		return ctx->ignoreKeyRepeat; // ##### FIXME! ##### this needs to change for multiple windows

	/* ##### NOT SUPPORTED YET #####
		case GLUT_DEVICE_KEY_REPEAT:
		return fgState.KeyRepeat;   */

		default:
				dprintf( "missing enum handle %d", eWhat );
				break;
		}

		/* And now -- the failure. */
		return -1;
}

/*
* This should return the current state of ALT, SHIFT and CTRL keys.
*/
int glut_GLUTGetModifiers(struct GlutIFace *Self)
{
		GLUTcontext ctx = (GLUTcontext)GET_INSTANCE(Self);
		FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutGetModifiers" );
	if( ctx->modifiers == MODIFIERS_INVALID )
		{
				dprintf( "called outside an input callback" );
				return 0;
		}

	return ctx->modifiers;
}

/*
* Return the state of the GLUT API overlay subsystem. A misery ;-)
*/
int glut_GLUTLayerGet(struct GlutIFace *Self, GLenum eWhat )
{
	GLUTcontext ctx = (GLUTcontext)GET_INSTANCE(Self);

	FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutLayerGet" );

		/*
		* This is easy as layers are not implemented ;-)
		*
		* XXX Can we merge the UNIX/X11 and WIN32 sections?  Or
		* XXX is overlay support planned?
		*/
	switch ( eWhat ) {

#if defined(TARGET_HOST_UNIX_X11) || defined(__amigaos4__)

		case GLUT_OVERLAY_POSSIBLE:
			return FALSE;

		case GLUT_LAYER_IN_USE:
			return GLUT_NORMAL;

		case GLUT_HAS_OVERLAY:
			return FALSE;

		case GLUT_TRANSPARENT_INDEX:
			/*
			 * Return just anything, which is always defined as zero
			 *
			 * XXX HUH?
			 */
			return 0;

		case GLUT_NORMAL_DAMAGED:
			/* XXX Actually I do not know. Maybe. */
			return FALSE;

		case GLUT_OVERLAY_DAMAGED:
			return -1;

#elif TARGET_HOST_WIN32 || TARGET_HOST_WINCE

		case GLUT_OVERLAY_POSSIBLE:
/*      return fgSetupPixelFormat( fgStructure.CurrentWindow, GL_TRUE,
																	PFD_OVERLAY_PLANE ); */
		return FALSE ;

		case GLUT_LAYER_IN_USE:
			return GLUT_NORMAL;

		case GLUT_HAS_OVERLAY:
			return FALSE;

		case GLUT_TRANSPARENT_INDEX:
			/*
			 * Return just anything, which is always defined as zero
			 *
			 * XXX HUH?
			 */
			return 0;

		case GLUT_NORMAL_DAMAGED:
			/* XXX Actually I do not know. Maybe. */
			return FALSE;

		case GLUT_OVERLAY_DAMAGED:
			return -1;
#endif

		default:
			dprintf( "missing enum handle %d", eWhat );
			break;
		}

		/* And fail. That's good. Programs do love failing. */
		return -1;
}

/*** END OF FILE ***/