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//
// GLUT emulation header file for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2023 by Bill Spitzak and others.
//
// This library is free software. Distribution and use rights are outlined in
// the file "COPYING" which should have been included with this file. If this
// file is missing or damaged, see the license at:
//
// https://www.fltk.org/COPYING.php
//
// Please see the following page on how to report bugs and issues:
//
// https://www.fltk.org/bugs.php
//
// 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.
// Commented out lines indicate parts of GLUT that are not emulated.
// Notes: as pointed out in STR #3458 the current GLUT window,
// i.e. the global static variable 'glut_window' can be NULL ...
// (a) if not (yet) initialized
// (b) if the current GLUT window is deleted at any time.
// The FLTK implementation silently ignores function calls if the current
// window is NULL to avoid dereferencing a NULL pointer. This is obviously
// compatible with GLUT version 3.7 according to comment #5 on STR #3458.
// According to the same comment FreeGLUT 3.0 would issue an error message
// and quit.
// Albrecht-S, Oct 2023
#ifndef _FL_glut_H_
# define _FL_glut_H_
# include "gl.h"
# include "Fl.H"
# include "Fl_Gl_Window.H"
/**
GLUT is emulated using this window class and these static variables
(plus several more static variables hidden in glut_compatibility.cxx):
*/
class FL_EXPORT Fl_Glut_Window : public Fl_Gl_Window {
void _init();
int mouse_down;
protected:
void draw() FL_OVERRIDE;
void draw_overlay() FL_OVERRIDE;
int handle(int) FL_OVERRIDE;
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 *t=0);
Fl_Glut_Window(int x, int y, int w, int h, const char *t=0);
~Fl_Glut_Window();
};
extern FL_EXPORT Fl_Glut_Window *glut_window; // the current window
extern FL_EXPORT int glut_menu; // the current menu
// function pointers that are not per-window:
extern FL_EXPORT void (*glut_idle_function)();
extern FL_EXPORT void (*glut_menustate_function)(int);
extern FL_EXPORT void (*glut_menustatus_function)(int,int,int);
////////////////////////////////////////////////////////////////
//# define GLUT_API_VERSION This does not match any version of GLUT exactly...
FL_EXPORT void glutInit(int *argcp, char **argv); // creates first window
FL_EXPORT void glutInitDisplayMode(unsigned int mode);
// the FL_ symbols have the same value as the GLUT ones:
# define GLUT_RGB FL_RGB
# define GLUT_RGBA FL_RGB
# define GLUT_INDEX FL_INDEX
# define GLUT_SINGLE FL_SINGLE
# define GLUT_DOUBLE FL_DOUBLE
# define GLUT_ACCUM FL_ACCUM
# define GLUT_ALPHA FL_ALPHA
# define GLUT_DEPTH FL_DEPTH
# define GLUT_STENCIL FL_STENCIL
# define GLUT_MULTISAMPLE FL_MULTISAMPLE
# define GLUT_STEREO FL_STEREO
// # define GLUT_LUMINANCE 512
FL_EXPORT void glutInitWindowPosition(int x, int y);
FL_EXPORT void glutInitWindowSize(int w, int h);
FL_EXPORT void glutMainLoop();
FL_EXPORT int glutCreateWindow(char *title);
FL_EXPORT int glutCreateWindow(const char *title);
FL_EXPORT int glutCreateSubWindow(int win, int x, int y, int width, int height);
FL_EXPORT void glutDestroyWindow(int win);
inline void glutPostRedisplay() {
if (glut_window) glut_window->redraw();
}
FL_EXPORT void glutPostWindowRedisplay(int win);
FL_EXPORT void glutSwapBuffers();
inline int glutGetWindow() {
return glut_window ? glut_window->number : 0;
}
FL_EXPORT void glutSetWindow(int win);
inline void glutSetWindowTitle(char *t) {
if (glut_window) glut_window->label(t);
}
inline void glutSetIconTitle(char *t) {
if (glut_window) glut_window->iconlabel(t);
}
inline void glutPositionWindow(int x, int y) {
if (glut_window) glut_window->position(x,y);
}
inline void glutReshapeWindow(int w, int h) {
if (glut_window) glut_window->size(w,h);
}
inline void glutPopWindow() {
if (glut_window) glut_window->show();
}
inline void glutPushWindow() { /* do nothing */ }
inline void glutIconifyWindow() {
if (glut_window) glut_window->iconize();
}
inline void glutShowWindow() {
if (glut_window) glut_window->show();
}
inline void glutHideWindow() {
if (glut_window) glut_window->hide();
}
inline void glutFullScreen() {
if (glut_window) glut_window->fullscreen();
}
inline void glutSetCursor(Fl_Cursor cursor) {
if (glut_window) glut_window->cursor(cursor);
}
// notice that the numeric values are different than glut:
# define GLUT_CURSOR_RIGHT_ARROW ((Fl_Cursor)2)
# define GLUT_CURSOR_LEFT_ARROW ((Fl_Cursor)67)
# define GLUT_CURSOR_INFO FL_CURSOR_HAND
# define GLUT_CURSOR_DESTROY ((Fl_Cursor)45)
# define GLUT_CURSOR_HELP FL_CURSOR_HELP
# define GLUT_CURSOR_CYCLE ((Fl_Cursor)26)
# define GLUT_CURSOR_SPRAY ((Fl_Cursor)63)
# define GLUT_CURSOR_WAIT FL_CURSOR_WAIT
# define GLUT_CURSOR_TEXT FL_CURSOR_INSERT
# define GLUT_CURSOR_CROSSHAIR FL_CURSOR_CROSS
# define GLUT_CURSOR_UP_DOWN FL_CURSOR_NS
# define GLUT_CURSOR_LEFT_RIGHT FL_CURSOR_WE
# define GLUT_CURSOR_TOP_SIDE FL_CURSOR_N
# define GLUT_CURSOR_BOTTOM_SIDE FL_CURSOR_S
# define GLUT_CURSOR_LEFT_SIDE FL_CURSOR_W
# define GLUT_CURSOR_RIGHT_SIDE FL_CURSOR_E
# define GLUT_CURSOR_TOP_LEFT_CORNER FL_CURSOR_NW
# define GLUT_CURSOR_TOP_RIGHT_CORNER FL_CURSOR_NE
# define GLUT_CURSOR_BOTTOM_RIGHT_CORNER FL_CURSOR_SE
# define GLUT_CURSOR_BOTTOM_LEFT_CORNER FL_CURSOR_SW
# define GLUT_CURSOR_INHERIT FL_CURSOR_DEFAULT
# define GLUT_CURSOR_NONE FL_CURSOR_NONE
# define GLUT_CURSOR_FULL_CROSSHAIR FL_CURSOR_CROSS
inline void glutWarpPointer(int, int) { /* do nothing */ }
inline void glutEstablishOverlay() {
if (glut_window) glut_window->make_overlay_current();
}
inline void glutRemoveOverlay() {
if (glut_window) glut_window->hide_overlay();
}
inline void glutUseLayer(GLenum layer) {
if (!glut_window)
return;
layer ? glut_window->make_overlay_current() : glut_window->make_current();
}
enum {GLUT_NORMAL, GLUT_OVERLAY};
inline void glutPostOverlayRedisplay() {
if (glut_window) glut_window->redraw_overlay();
}
inline void glutShowOverlay() {
if (glut_window) glut_window->redraw_overlay();
}
inline void glutHideOverlay() {
if (glut_window) glut_window->hide_overlay();
}
FL_EXPORT int glutCreateMenu(void (*)(int));
FL_EXPORT void glutDestroyMenu(int menu);
inline int glutGetMenu() {return glut_menu;}
inline void glutSetMenu(int m) {glut_menu = m;}
FL_EXPORT void glutAddMenuEntry(const char *label, int value);
FL_EXPORT void glutAddSubMenu(char *label, int submenu);
FL_EXPORT void glutChangeToMenuEntry(int item, char *labela, int value);
FL_EXPORT void glutChangeToSubMenu(int item, char *label, int submenu);
FL_EXPORT void glutRemoveMenuItem(int item);
inline void glutAttachMenu(int b) {
if (glut_window) glut_window->menu[b] = glut_menu;
}
inline void glutDetachMenu(int b) {
if (glut_window) glut_window->menu[b] = 0;
}
inline void glutDisplayFunc(void (*f)()) {
if (glut_window) glut_window->display = f;
}
inline void glutReshapeFunc(void (*f)(int w, int h)) {
if (glut_window) glut_window->reshape = f;
}
inline void glutKeyboardFunc(void (*f)(uchar key, int x, int y)) {
if (glut_window) glut_window->keyboard = f;
}
inline void glutMouseFunc(void (*f)(int b, int state, int x, int y)) {
if (glut_window) glut_window->mouse = f;
}
# define GLUT_LEFT_BUTTON 0
# define GLUT_MIDDLE_BUTTON 1
# define GLUT_RIGHT_BUTTON 2
# define GLUT_DOWN 0
# define GLUT_UP 1
inline void glutMotionFunc(void (*f)(int x, int y)) {
if (glut_window) glut_window->motion = f;
}
inline void glutPassiveMotionFunc(void (*f)(int x, int y)) {
if (glut_window) glut_window->passivemotion = f;
}
inline void glutEntryFunc(void (*f)(int s)) {
if (glut_window) glut_window->entry = f;
}
enum {GLUT_LEFT, GLUT_ENTERED};
inline void glutVisibilityFunc(void (*f)(int s)) {
if (glut_window) glut_window->visibility = f;
}
enum {GLUT_NOT_VISIBLE, GLUT_VISIBLE};
FL_EXPORT void glutIdleFunc(void (*f)());
inline void glutTimerFunc(unsigned int msec, void (*f)(int), int value) {
Fl::add_timeout(msec*.001, (void (*)(void *))f, (void *)(fl_intptr_t)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)) {
if (glut_window) glut_window->special = f;
}
# define GLUT_KEY_F1 1
# define GLUT_KEY_F2 2
# define GLUT_KEY_F3 3
# define GLUT_KEY_F4 4
# define GLUT_KEY_F5 5
# define GLUT_KEY_F6 6
# define GLUT_KEY_F7 7
# define GLUT_KEY_F8 8
# define GLUT_KEY_F9 9
# define GLUT_KEY_F10 10
# define GLUT_KEY_F11 11
# define GLUT_KEY_F12 12
// WARNING: Different values than GLUT uses:
# define GLUT_KEY_LEFT FL_Left
# define GLUT_KEY_UP FL_Up
# define GLUT_KEY_RIGHT FL_Right
# define GLUT_KEY_DOWN FL_Down
# define GLUT_KEY_PAGE_UP FL_Page_Up
# define GLUT_KEY_PAGE_DOWN FL_Page_Down
# define GLUT_KEY_HOME FL_Home
# define GLUT_KEY_END FL_End
# define GLUT_KEY_INSERT FL_Insert
// 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)()) {
if (glut_window) 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_EXPORT 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_SCREEN_WIDTH,
GLUT_SCREEN_HEIGHT,
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_WINDOW_BUFFER_SIZE,
GLUT_VERSION,
//GLUT_WINDOW_NUM_CHILDREN,
//GLUT_WINDOW_CURSOR,
//GLUT_SCREEN_WIDTH_MM,
//GLUT_SCREEN_HEIGHT_MM,
GLUT_ELAPSED_TIME
};
# 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
# 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
FL_EXPORT int glutDeviceGet(GLenum type);
// WARNING: these values are different than GLUT uses:
# define GLUT_ACTIVE_SHIFT FL_SHIFT
# define GLUT_ACTIVE_CTRL FL_CTRL
# define GLUT_ACTIVE_ALT FL_ALT
inline int glutGetModifiers() {
return Fl::event_state() & (GLUT_ACTIVE_SHIFT | GLUT_ACTIVE_CTRL | GLUT_ACTIVE_ALT);
}
FL_EXPORT 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
extern "C" {
typedef void (*GLUTproc)();
}
FL_EXPORT GLUTproc glutGetProcAddress(const char *procName);
// 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);
// Font argument must be a void* for compatibility, so...
/** fltk glut font/size attributes used in the glutXXX functions */
struct Fl_Glut_Bitmap_Font {Fl_Font font; Fl_Fontsize size;};
extern FL_EXPORT struct Fl_Glut_Bitmap_Font
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_EXPORT void glutBitmapCharacter(void *font, int character);
FL_EXPORT int glutBitmapHeight(void *font);
FL_EXPORT int glutBitmapLength(void *font, const unsigned char *string);
FL_EXPORT void glutBitmapString(void *font, const unsigned char *string);
FL_EXPORT int glutBitmapWidth(void *font, int character);
FL_EXPORT int glutExtensionSupported(char *name);
/* GLUT stroked font sub-API */
struct Fl_Glut_StrokeVertex {
GLfloat X, Y;
};
struct Fl_Glut_StrokeStrip {
int Number;
const Fl_Glut_StrokeVertex* Vertices;
};
struct Fl_Glut_StrokeChar {
GLfloat Right;
int Number;
const Fl_Glut_StrokeStrip* Strips;
};
struct Fl_Glut_StrokeFont {
char* Name; // The source font name
int Quantity; // Number of chars in font
GLfloat Height; // Height of the characters
const Fl_Glut_StrokeChar** Characters;// The characters mapping
};
extern FL_EXPORT Fl_Glut_StrokeFont glutStrokeRoman;
extern FL_EXPORT Fl_Glut_StrokeFont glutStrokeMonoRoman;
# define GLUT_STROKE_ROMAN (&glutStrokeRoman)
# define GLUT_STROKE_MONO_ROMAN (&glutStrokeMonoRoman)
FL_EXPORT void glutStrokeCharacter(void *font, int character);
FL_EXPORT GLfloat glutStrokeHeight(void *font);
FL_EXPORT int glutStrokeLength(void *font, const unsigned char *string);
FL_EXPORT void glutStrokeString(void *font, const unsigned char *string);
FL_EXPORT int glutStrokeWidth(void *font, int character);
/* GLUT pre-built models sub-API */
FL_EXPORT void glutWireSphere(GLdouble radius, GLint slices, GLint stacks);
FL_EXPORT void glutSolidSphere(GLdouble radius, GLint slices, GLint stacks);
FL_EXPORT void glutWireCone(GLdouble base, GLdouble height, GLint slices, GLint stacks);
FL_EXPORT void glutSolidCone(GLdouble base, GLdouble height, GLint slices, GLint stacks);
FL_EXPORT void glutWireCube(GLdouble size);
FL_EXPORT void glutSolidCube(GLdouble size);
FL_EXPORT void glutWireTorus(GLdouble innerRadius, GLdouble outerRadius, GLint sides, GLint rings);
FL_EXPORT void glutSolidTorus(GLdouble innerRadius, GLdouble outerRadius, GLint sides, GLint rings);
FL_EXPORT void glutWireDodecahedron();
FL_EXPORT void glutSolidDodecahedron();
FL_EXPORT void glutWireTeapot(GLdouble size);
FL_EXPORT void glutSolidTeapot(GLdouble size);
FL_EXPORT void glutWireOctahedron();
FL_EXPORT void glutSolidOctahedron();
FL_EXPORT void glutWireTetrahedron();
FL_EXPORT void glutSolidTetrahedron();
FL_EXPORT void glutWireIcosahedron();
FL_EXPORT void glutSolidIcosahedron();
#endif // !_FL_glut_H_
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