ref: ce8b5651bc33720a4f34309c81d0b12d7ce5791e
dir: /DoConfig/fltk/FL/gl.h/
//
// "$Id$"
//
// OpenGL header file for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2011 by Bill Spitzak and others.
//
// You must include this instead of GL/gl.h to get the Microsoft
// APIENTRY stuff included (from <windows.h>) prior to the OpenGL
// header files.
//
// This file also provides "missing" OpenGL functions, and
// gl_start() and gl_finish() to allow OpenGL to be used in any window
//
// 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:
//
// http://www.fltk.org/COPYING.php
//
// Please report all bugs and problems on the following page:
//
// http://www.fltk.org/str.php
//
/** \file gl.h
* This file defines wrapper functions for OpenGL in FLTK
*
* To use OpenGL from within an FLTK application you MUST use gl_visual()
* to select the default visual before doing show() on any windows. Mesa
* will crash if yoy try to use a visual not returned by glxChooseVidual.
*
* This does not work with Fl_Double_Window's! It will try to draw
* into the front buffer. Depending on the system this will either
* crash or do nothing (when pixmaps are being used as back buffer
* and GL is being done by hardware), work correctly (when GL is done
* with software, such as Mesa), or draw into the front buffer and
* be erased when the buffers are swapped (when double buffer hardware
* is being used)
*/
#ifndef FL_gl_H
# define FL_gl_H
# include "Enumerations.H" // for color names
# ifdef WIN32
# include <windows.h>
# endif
# ifndef APIENTRY
# if defined(__CYGWIN__)
# define APIENTRY __attribute__ ((__stdcall__))
# else
# define APIENTRY
# endif
# endif
# ifdef __APPLE__
# include <OpenGL/gl.h>
# else
# include <GL/gl.h>
# endif // __APPLE__
FL_EXPORT void gl_start();
FL_EXPORT void gl_finish();
FL_EXPORT void gl_color(Fl_Color i);
/** back compatibility */
inline void gl_color(int c) {gl_color((Fl_Color)c);}
FL_EXPORT void gl_rect(int x,int y,int w,int h);
/**
Fills the given rectangle with the current color.
\see gl_rect(int x, int y, int w, int h)
*/
inline void gl_rectf(int x,int y,int w,int h) {glRecti(x,y,x+w,y+h);}
FL_EXPORT void gl_font(int fontid, int size);
FL_EXPORT int gl_height();
FL_EXPORT int gl_descent();
FL_EXPORT double gl_width(const char *);
FL_EXPORT double gl_width(const char *, int n);
FL_EXPORT double gl_width(uchar);
FL_EXPORT void gl_draw(const char*);
FL_EXPORT void gl_draw(const char*, int n);
FL_EXPORT void gl_draw(const char*, int x, int y);
FL_EXPORT void gl_draw(const char*, float x, float y);
FL_EXPORT void gl_draw(const char*, int n, int x, int y);
FL_EXPORT void gl_draw(const char*, int n, float x, float y);
FL_EXPORT void gl_draw(const char*, int x, int y, int w, int h, Fl_Align);
FL_EXPORT void gl_measure(const char*, int& x, int& y);
#ifdef __APPLE__
extern FL_EXPORT void gl_texture_pile_height(int max);
extern FL_EXPORT int gl_texture_pile_height();
#endif
FL_EXPORT void gl_draw_image(const uchar *, int x,int y,int w,int h, int d=3, int ld=0);
#endif // !FL_gl_H
//
// End of "$Id$".
//