mirror of https://github.com/fltk/fltk
104 lines
3.2 KiB
C
104 lines
3.2 KiB
C
//
|
|
// "$Id$"
|
|
//
|
|
// OpenGL header file for the Fast Light Tool Kit (FLTK).
|
|
//
|
|
// Copyright 1998-2018 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 you try to use a visual not returned by glxChooseVisual.
|
|
|
|
Historically, this did not always work well with Fl_Double_Window's!
|
|
It can try to draw into the front buffer.
|
|
Depending on the system this might 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__ // PORTME: OpenGL path abstraction
|
|
# include <OpenGL/gl.h>
|
|
# else
|
|
# include <GL/gl.h>
|
|
# endif // __APPLE__ // PORTME: OpenGL Path abstraction
|
|
|
|
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);
|
|
FL_EXPORT void gl_texture_pile_height(int max);
|
|
FL_EXPORT int gl_texture_pile_height();
|
|
|
|
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 "$Id$".
|
|
//
|