//
// "$Id: glut.h 3961 2005-01-24 08:07:59Z spitzak $"
//
// GLUT emulation header file for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2003 by Bill Spitzak and others.
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Library General Public License for more details.
//
// You should have received a copy of the GNU Library General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA.
//
// Please report all bugs and problems to "fltk-bugs@fltk.org".
//

// Emulation of Glut using fltk.

// GLUT is Copyright (c) Mark J. Kilgard, 1994, 1995, 1996:
// "This program is freely distributable without licensing fees  and is
// provided without guarantee or warrantee expressed or  implied. This
// program is -not- in the public domain."

// Although I have copied the GLUT API, none of my code is based on
// any Glut implementation details and is therefore covered by the LGPL.

// Fltk does not include the Glut drawing functions (such as
// glutWireTeapot()) or the stroke fonts but the declarations for the
// drawing functions are included here because otherwise there is no
// way to get them along with this.  To use them you will have to
// link in the original Glut library, put -lglut *after* -lfltk.

// Commented out lines indicate parts of Glut that are not emulated.

#ifndef __glut_h__
#define __glut_h__

#include <fltk/run.h>
#include <fltk/GlWindow.h>
#include <fltk/gl.h>
#include <fltk/events.h>
#include <fltk/visual.h>
//#include <GL/glu.h>

////////////////////////////////////////////////////////////////
// Glut is emulated using this window class and these static variables
// (plus several more static variables hidden in glut.C):

class FL_GLUT_API Fl_Glut_Window : public fltk::GlWindow {
  void _init();
  int mouse_down;
protected:
  void draw();
  void draw_overlay();
  int handle(int);
public: // so the inline functions work
  int number;
  int menu[3];
  void make_current();
  void (*display)();
  void (*overlaydisplay)();
  void (*reshape)(int w, int h);
  void (*keyboard)(uchar, int x, int y);
  void (*mouse)(int b, int state, int x, int y);
  void (*motion)(int x, int y);
  void (*passivemotion)(int x, int y);
  void (*entry)(int);
  void (*visibility)(int);
  void (*special)(int, int x, int y);
  Fl_Glut_Window(int w, int h, const char *);
  Fl_Glut_Window(int x, int y, int w, int h, const char *);
  ~Fl_Glut_Window();
};

extern FL_GLUT_API Fl_Glut_Window *glut_window;	// the current window
extern FL_GLUT_API int glut_menu;			// the current menu

// function pointers that are not per-window:
extern FL_GLUT_API void (*glut_idle_function)();
extern FL_GLUT_API void (*glut_menustate_function)(int);
extern FL_GLUT_API void (*glut_menustatus_function)(int,int,int);

////////////////////////////////////////////////////////////////

//#define GLUT_API_VERSION This does not match any version of Glut exactly...

FL_GLUT_API void glutInit(int *argcp, char **argv); // creates first window

FL_GLUT_API void glutInitDisplayMode(unsigned int mode);
// the FL_ symbols have the same value as the GLUT ones:
enum {
  GLUT_RGB	= fltk::RGB_COLOR,
  GLUT_RGBA	= fltk::RGB_COLOR,
  GLUT_INDEX	= fltk::INDEXED_COLOR,
  GLUT_SINGLE	= fltk::SINGLE_BUFFER,
  GLUT_DOUBLE	= fltk::DOUBLE_BUFFER,
  GLUT_ACCUM	= fltk::ACCUM_BUFFER,
  GLUT_ALPHA	= fltk::ALPHA_BUFFER,
  GLUT_DEPTH	= fltk::DEPTH_BUFFER,
  GLUT_STENCIL	= fltk::STENCIL_BUFFER,
  GLUT_MULTISAMPLE = fltk::MULTISAMPLE,
  GLUT_STEREO	= fltk::STEREO
//GLUT_LUMINANCE = 512
};

FL_GLUT_API void glutInitWindowPosition(int x, int y);

FL_GLUT_API void glutInitWindowSize(int w, int h);

FL_GLUT_API void glutMainLoop();

FL_GLUT_API int glutCreateWindow(const char *title);

FL_GLUT_API int glutCreateSubWindow(int win, int x, int y, int width, int height);

FL_GLUT_API void glutDestroyWindow(int win);

inline void glutPostRedisplay() {glut_window->redraw();}

FL_GLUT_API void glutSwapBuffers();

inline int glutGetWindow() {return glut_window->number;}

FL_GLUT_API void glutSetWindow(int win);

inline void glutSetWindowTitle(const char *t) {glut_window->label(t);}

inline void glutSetIconTitle(const char *t) {glut_window->iconlabel(t);}

inline void glutPositionWindow(int x, int y) {glut_window->position(x,y);}

inline void glutReshapeWindow(int w, int h) {glut_window->resize(w,h);}

inline void glutPopWindow() {glut_window->show();}

//inline void glutPushWindow();

inline void glutIconifyWindow() {glut_window->iconize();}

inline void glutShowWindow() {glut_window->show();}

inline void glutHideWindow() {glut_window->hide();}

inline void glutFullScreen() {glut_window->fullscreen();}

inline void glutSetCursor(fltk::Cursor* cursor) {glut_window->cursor(cursor);}

//#define GLUT_CURSOR_RIGHT_ARROW
//#define GLUT_CURSOR_LEFT_ARROW
#define GLUT_CURSOR_INFO	fltk::CURSOR_HAND
//#define GLUT_CURSOR_DESTROY
#define GLUT_CURSOR_HELP	fltk::CURSOR_HELP
//#define GLUT_CURSOR_CYCLE
//#define GLUT_CURSOR_SPRAY
#define GLUT_CURSOR_WAIT	fltk::CURSOR_WAIT
#define GLUT_CURSOR_TEXT	fltk::CURSOR_INSERT
#define GLUT_CURSOR_CROSSHAIR	fltk::CURSOR_CROSS
#define GLUT_CURSOR_UP_DOWN	fltk::CURSOR_NS
#define GLUT_CURSOR_TOP_SIDE	fltk::CURSOR_NS
#define GLUT_CURSOR_BOTTOM_SIDE	fltk::CURSOR_NS
#define GLUT_CURSOR_LEFT_RIGHT	fltk::CURSOR_WE
#define GLUT_CURSOR_LEFT_SIDE	fltk::CURSOR_WE
#define GLUT_CURSOR_RIGHT_SIDE	fltk::CURSOR_WE
#define GLUT_CURSOR_TOP_LEFT_CORNER	fltk::CURSOR_NWSE
#define GLUT_CURSOR_TOP_RIGHT_CORNER	fltk::CURSOR_NESW
#define GLUT_CURSOR_BOTTOM_RIGHT_CORNER	fltk::CURSOR_NWSE
#define GLUT_CURSOR_BOTTOM_LEFT_CORNER	fltk::CURSOR_NESW
#define GLUT_CURSOR_INHERIT		fltk::CURSOR_DEFAULT
#define GLUT_CURSOR_NONE		fltk::CURSOR_NONE
#define GLUT_CURSOR_FULL_CROSSHAIR	fltk::CURSOR_CROSS

//inline void glutWarpPointer(int x, int y);

inline void glutEstablishOverlay() {glut_window->make_overlay_current();}

inline void glutRemoveOverlay() {glut_window->hide_overlay();}

inline void glutUseLayer(GLenum layer) {
  layer ? glut_window->make_overlay_current() : glut_window->make_current();}
enum {GLUT_NORMAL, GLUT_OVERLAY};

inline void glutPostOverlayRedisplay() {glut_window->redraw_overlay();}

inline void glutShowOverlay() {glut_window->redraw_overlay();}

inline void glutHideOverlay() {glut_window->hide_overlay();}

FL_GLUT_API int glutCreateMenu(void (*)(int));

FL_GLUT_API void glutDestroyMenu(int menu);

inline int glutGetMenu() {return glut_menu;}

inline void glutSetMenu(int m) {glut_menu = m;}

FL_GLUT_API void glutAddMenuEntry(const char *label, int value);

FL_GLUT_API void glutAddSubMenu(const char *label, int submenu);

FL_GLUT_API void glutChangeToMenuEntry(int item, const char *label, int value);

FL_GLUT_API void glutChangeToSubMenu(int item, const char *label, int submenu);

FL_GLUT_API void glutRemoveMenuItem(int item);

inline void glutAttachMenu(int b) {glut_window->menu[b] = glut_menu;}

inline void glutDetachMenu(int b) {glut_window->menu[b] = 0;}

inline void glutDisplayFunc(void (*f)()) {glut_window->display = f;}

inline void glutReshapeFunc(void (*f)(int w, int h)) {glut_window->reshape=f;}

inline void glutKeyboardFunc(void (*f)(uchar key, int x, int y)) {
  glut_window->keyboard = f;}

inline void glutMouseFunc(void (*f)(int b, int state, int x, int y)) {
  glut_window->mouse = f;}
enum {
  GLUT_LEFT_BUTTON	= 0,
  GLUT_MIDDLE_BUTTON	= 1,
  GLUT_RIGHT_BUTTON	= 2,
  GLUT_DOWN		= 0,
  GLUT_UP		= 1
};

inline void glutMotionFunc(void (*f)(int x, int y)) {glut_window->motion= f;}

inline void glutPassiveMotionFunc(void (*f)(int x, int y)) {
  glut_window->passivemotion= f;}

inline void glutEntryFunc(void (*f)(int s)) {glut_window->entry = f;}
enum {GLUT_LEFT, GLUT_ENTERED};

inline void glutVisibilityFunc(void (*f)(int s)) {glut_window->visibility=f;}
enum {GLUT_NOT_VISIBLE, GLUT_VISIBLE};

inline void glutIdleFunc(void (*f)()) {fltk::set_idle(f);}

// Warning: this cast may not work on all machines:
inline void glutTimerFunc(unsigned int msec, void (*f)(int), int value) {
  fltk::add_timeout(msec*.001f, (fltk::TimeoutHandler)f, (void *)value);
}

inline void glutMenuStateFunc(void (*f)(int state)) {
  glut_menustate_function = f;}

inline void glutMenuStatusFunc(void (*f)(int status, int x, int y)) {
  glut_menustatus_function = f;}
enum {GLUT_MENU_NOT_IN_USE, GLUT_MENU_IN_USE};

inline void glutSpecialFunc(void (*f)(int key, int x, int y)) {
  glut_window->special = f;}
enum {
  GLUT_KEY_F1		= 1,
  GLUT_KEY_F2		= 2,
  GLUT_KEY_F3		= 3,
  GLUT_KEY_F4		= 4,
  GLUT_KEY_F5		= 5,
  GLUT_KEY_F6		= 6,
  GLUT_KEY_F7		= 7,
  GLUT_KEY_F8		= 8,
  GLUT_KEY_F9		= 9,
  GLUT_KEY_F10		= 10,
  GLUT_KEY_F11		= 11,
  GLUT_KEY_F12		= 12,
// WARNING: Different values than Glut uses:
  GLUT_KEY_LEFT		= fltk::LeftKey,
  GLUT_KEY_UP		= fltk::UpKey,
  GLUT_KEY_RIGHT	= fltk::RightKey,
  GLUT_KEY_DOWN		= fltk::DownKey,
  GLUT_KEY_PAGE_UP	= fltk::PageUpKey,
  GLUT_KEY_PAGE_DOWN	= fltk::PageDownKey,
  GLUT_KEY_HOME		= fltk::HomeKey,
  GLUT_KEY_END		= fltk::EndKey,
  GLUT_KEY_INSERT	= fltk::InsertKey
};

//inline void glutSpaceballMotionFunc(void (*)(int x, int y, int z));

//inline void glutSpaceballRotateFunc(void (*)(int x, int y, int z));

//inline void glutSpaceballButtonFunc(void (*)(int button, int state));

//inline void glutButtonBoxFunc(void (*)(int button, int state));

//inline void glutDialsFunc(void (*)(int dial, int value));

//inline void glutTabletMotionFunc(void (*)(int x, int y));

//inline void glutTabletButtonFunc(void (*)(int button, int state, int x, int y));

inline void glutOverlayDisplayFunc(void (*f)()) {
  glut_window->overlaydisplay = f;}

//inline void glutWindowStatusFunc(void (*)(int state));
//enum {GLUT_HIDDEN, GLUT_FULLY_RETAINED, GLUT_PARTIALLY_RETAINED,
//	GLUT_FULLY_COVERED};

//inline void glutSetColor(int, GLfloat red, GLfloat green, GLfloat blue);

//inline GLfloat glutGetColor(int ndx, int component);
//#define GLUT_RED			0
//#define GLUT_GREEN			1
//#define GLUT_BLUE			2

//inline void glutCopyColormap(int win);

// Warning: values are changed from Glut!
// Also relies on the GL_ symbols having values greater than 100
FL_GLUT_API int glutGet(GLenum type);
enum {
  GLUT_RETURN_ZERO = 0,
  GLUT_WINDOW_X,
  GLUT_WINDOW_Y,
  GLUT_WINDOW_WIDTH,
  GLUT_WINDOW_HEIGHT,
  GLUT_WINDOW_PARENT,
//GLUT_WINDOW_NUM_CHILDREN,
//GLUT_WINDOW_CURSOR,
  GLUT_SCREEN_WIDTH,
  GLUT_SCREEN_HEIGHT,
//GLUT_SCREEN_WIDTH_MM,
//GLUT_SCREEN_HEIGHT_MM,
  GLUT_MENU_NUM_ITEMS,
  GLUT_DISPLAY_MODE_POSSIBLE,
  GLUT_INIT_WINDOW_X,
  GLUT_INIT_WINDOW_Y,
  GLUT_INIT_WINDOW_WIDTH,
  GLUT_INIT_WINDOW_HEIGHT,
  GLUT_INIT_DISPLAY_MODE,
//GLUT_ELAPSED_TIME,
  GLUT_WINDOW_BUFFER_SIZE
};

#define GLUT_WINDOW_STENCIL_SIZE	GL_STENCIL_BITS
#define GLUT_WINDOW_DEPTH_SIZE		GL_DEPTH_BITS
#define GLUT_WINDOW_RED_SIZE		GL_RED_BITS
#define GLUT_WINDOW_GREEN_SIZE		GL_GREEN_BITS
#define GLUT_WINDOW_BLUE_SIZE		GL_BLUE_BITS
#define GLUT_WINDOW_ALPHA_SIZE		GL_ALPHA_BITS
#define GLUT_WINDOW_ACCUM_RED_SIZE	GL_ACCUM_RED_BITS
#define GLUT_WINDOW_ACCUM_GREEN_SIZE	GL_ACCUM_GREEN_BITS
#define GLUT_WINDOW_ACCUM_BLUE_SIZE	GL_ACCUM_BLUE_BITS
#define GLUT_WINDOW_ACCUM_ALPHA_SIZE	GL_ACCUM_ALPHA_BITS
#define GLUT_WINDOW_DOUBLEBUFFER	GL_DOUBLEBUFFER
#define GLUT_WINDOW_RGBA		GL_RGBA
#define GLUT_WINDOW_COLORMAP_SIZE	GL_INDEX_BITS
#ifdef GL_SAMPLES_SGIS
#define GLUT_WINDOW_NUM_SAMPLES		GL_SAMPLES_SGIS
#else
#define GLUT_WINDOW_NUM_SAMPLES		GLUT_RETURN_ZERO
#endif
#define GLUT_WINDOW_STEREO		GL_STEREO

//int glutDeviceGet(GLenum type);
//#define GLUT_HAS_KEYBOARD		600
//#define GLUT_HAS_MOUSE		601
//#define GLUT_HAS_SPACEBALL		602
//#define GLUT_HAS_DIAL_AND_BUTTON_BOX	603
//#define GLUT_HAS_TABLET		604
//#define GLUT_NUM_MOUSE_BUTTONS	605
//#define GLUT_NUM_SPACEBALL_BUTTONS	606
//#define GLUT_NUM_BUTTON_BOX_BUTTONS	607
//#define GLUT_NUM_DIALS		608
//#define GLUT_NUM_TABLET_BUTTONS	609

// WARNING: these values are different than Glut uses:
enum {
  GLUT_ACTIVE_SHIFT	= fltk::SHIFT,
  GLUT_ACTIVE_CTRL	= fltk::CTRL,
  GLUT_ACTIVE_ALT	= fltk::ALT
};
inline int glutGetModifiers() { return fltk::event_state() & (GLUT_ACTIVE_SHIFT | GLUT_ACTIVE_CTRL | GLUT_ACTIVE_ALT) ;}

FL_GLUT_API int glutLayerGet(GLenum);
#define GLUT_OVERLAY_POSSIBLE		800
//#define GLUT_LAYER_IN_USE		801
//#define GLUT_HAS_OVERLAY		802
#define GLUT_TRANSPARENT_INDEX		803
#define GLUT_NORMAL_DAMAGED		804
#define GLUT_OVERLAY_DAMAGED		805

//inline int glutVideoResizeGet(GLenum param);
//#define GLUT_VIDEO_RESIZE_POSSIBLE	900
//#define GLUT_VIDEO_RESIZE_IN_USE	901
//#define GLUT_VIDEO_RESIZE_X_DELTA	902
//#define GLUT_VIDEO_RESIZE_Y_DELTA	903
//#define GLUT_VIDEO_RESIZE_WIDTH_DELTA	904
//#define GLUT_VIDEO_RESIZE_HEIGHT_DELTA 905
//#define GLUT_VIDEO_RESIZE_X		906
//#define GLUT_VIDEO_RESIZE_Y		907
//#define GLUT_VIDEO_RESIZE_WIDTH	908
//#define GLUT_VIDEO_RESIZE_HEIGHT	909

//inline void glutSetupVideoResizing();

//inline void glutStopVideoResizing();

//inline void glutVideoResize(int x, int y, int width, int height);

//inline void glutVideoPan(int x, int y, int width, int height);

////////////////////////////////////////////////////////////////
// Emulated Glut drawing functions:

// Font argument must be a void* for compatability, so...
extern FL_GLUT_API struct Glut_Bitmap_Font {fltk::Font* font; int size;}
  glutBitmap9By15, glutBitmap8By13, glutBitmapTimesRoman10,
  glutBitmapTimesRoman24, glutBitmapHelvetica10, glutBitmapHelvetica12,
  glutBitmapHelvetica18;
#define GLUT_BITMAP_9_BY_15             (&glutBitmap9By15)
#define GLUT_BITMAP_8_BY_13             (&glutBitmap8By13)
#define GLUT_BITMAP_TIMES_ROMAN_10      (&glutBitmapTimesRoman10)
#define GLUT_BITMAP_TIMES_ROMAN_24      (&glutBitmapTimesRoman24)
#define GLUT_BITMAP_HELVETICA_10        (&glutBitmapHelvetica10)
#define GLUT_BITMAP_HELVETICA_12        (&glutBitmapHelvetica12)
#define GLUT_BITMAP_HELVETICA_18        (&glutBitmapHelvetica18)

FL_GLUT_API void glutBitmapCharacter(void *font, int character);
FL_GLUT_API int glutBitmapWidth(void *font, int character);

////////////////////////////////////////////////////////////////
// Glut drawing functions.  These are NOT emulated but you can
// link in the glut library to get them.  This assummes the object
// files in Glut remain as they currently are so that there are
// not symbol conflicts with the above.

extern "C" {
#ifndef APIENTRY
# define APIENTRY
#endif

extern int APIENTRY glutExtensionSupported(const char *name);

/* Stroke font constants (use these in GLUT program). */
#ifdef _WIN32
# define GLUT_STROKE_ROMAN		((void*)0)
# define GLUT_STROKE_MONO_ROMAN		((void*)1)
#else
extern void *glutStrokeRoman;
# define GLUT_STROKE_ROMAN		(&glutStrokeRoman)
extern void *glutStrokeMonoRoman;
# define GLUT_STROKE_MONO_ROMAN		(&glutStrokeMonoRoman)
#endif

/* GLUT font sub-API */
extern void APIENTRY glutStrokeCharacter(void *font, int character);
extern int APIENTRY glutStrokeWidth(void *font, int character);

/* GLUT pre-built models sub-API */
extern void APIENTRY glutWireSphere(GLdouble radius, GLint slices, GLint stacks);
extern void APIENTRY glutSolidSphere(GLdouble radius, GLint slices, GLint stacks);
extern void APIENTRY glutWireCone(GLdouble base, GLdouble height, GLint slices, GLint stacks);
extern void APIENTRY glutSolidCone(GLdouble base, GLdouble height, GLint slices, GLint stacks);
extern void APIENTRY glutWireCube(GLdouble size);
extern void APIENTRY glutSolidCube(GLdouble size);
extern void APIENTRY glutWireTorus(GLdouble innerRadius, GLdouble outerRadius, GLint sides, GLint rings);
extern void APIENTRY glutSolidTorus(GLdouble innerRadius, GLdouble outerRadius, GLint sides, GLint rings);
extern void APIENTRY glutWireDodecahedron();
extern void APIENTRY glutSolidDodecahedron();
extern void APIENTRY glutWireTeapot(GLdouble size);
extern void APIENTRY glutSolidTeapot(GLdouble size);
extern void APIENTRY glutWireOctahedron();
extern void APIENTRY glutSolidOctahedron();
extern void APIENTRY glutWireTetrahedron();
extern void APIENTRY glutSolidTetrahedron();
extern void APIENTRY glutWireIcosahedron();
extern void APIENTRY glutSolidIcosahedron();

}

#endif                  /* __glut_h__ */

//
// End of "$Id: glut.h 3961 2005-01-24 08:07:59Z spitzak $".
//