20775caf08
also corrected function signatures in opengl.dox added doxygen comments to FL/gl.h, src/gl_start.cxx, src/gl_draw.cxx git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@6749 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
109 lines
3.5 KiB
C
109 lines
3.5 KiB
C
//
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// "$Id$"
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//
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// OpenGL header file for the Fast Light Tool Kit (FLTK).
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//
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// Copyright 1998-2009 by Bill Spitzak and others.
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//
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// You must include this instead of GL/gl.h to get the Microsoft
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// APIENTRY stuff included (from <windows.h>) prior to the OpenGL
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// header files.
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//
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// This file also provides "missing" OpenGL functions, and
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// gl_start() and gl_finish() to allow OpenGL to be used in any window
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Library General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Library General Public License for more details.
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//
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// You should have received a copy of the GNU Library General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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// USA.
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//
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// Please report all bugs and problems on the following page:
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//
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// http://www.fltk.org/str.php
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//
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/** \file gl.h
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* This file defines wrapper functions for OpenGL in FLTK
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*
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* To use OpenGL from within an FLTK application you MUST use gl_visual()
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* to select the default visual before doing show() on any windows. Mesa
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* will crash if yoy try to use a visual not returned by glxChooseVidual.
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*
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* This does not work with Fl_Double_Window's! It will try to draw
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* into the front buffer. Depending on the system this will either
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* crash or do nothing (when pixmaps are being used as back buffer
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* and GL is being done by hardware), work correctly (when GL is done
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* with software, such as Mesa), or draw into the front buffer and
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* be erased when the buffers are swapped (when double buffer hardware
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* is being used)
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*/
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#ifndef FL_gl_H
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# define FL_gl_H
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# include "Enumerations.H" // for color names
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# ifdef WIN32
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# include <windows.h>
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# endif
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# ifndef APIENTRY
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# if defined(__CYGWIN__)
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# define APIENTRY __attribute__ ((__stdcall__))
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# else
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# define APIENTRY
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# endif
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# endif
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# ifdef __APPLE__
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# include <OpenGL/gl.h>
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# else
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# include <GL/gl.h>
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# endif
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FL_EXPORT void gl_start();
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FL_EXPORT void gl_finish();
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FL_EXPORT void gl_color(Fl_Color i);
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/** back compatability */
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inline void gl_color(int c) {gl_color((Fl_Color)c);}
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FL_EXPORT void gl_rect(int x,int y,int w,int h);
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/**
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Fills the given rectangle with the current color.
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\see gl_rect(int x, int y, int w, int h)
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*/
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inline void gl_rectf(int x,int y,int w,int h) {glRecti(x,y,x+w,y+h);}
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FL_EXPORT void gl_font(int fontid, int size);
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FL_EXPORT int gl_height();
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FL_EXPORT int gl_descent();
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FL_EXPORT double gl_width(const char *);
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FL_EXPORT double gl_width(const char *, int n);
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FL_EXPORT double gl_width(uchar);
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FL_EXPORT void gl_draw(const char*);
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FL_EXPORT void gl_draw(const char*, int n);
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FL_EXPORT void gl_draw(const char*, int x, int y);
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FL_EXPORT void gl_draw(const char*, float x, float y);
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FL_EXPORT void gl_draw(const char*, int n, int x, int y);
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FL_EXPORT void gl_draw(const char*, int n, float x, float y);
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FL_EXPORT void gl_draw(const char*, int x, int y, int w, int h, Fl_Align);
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FL_EXPORT void gl_measure(const char*, int& x, int& y);
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FL_EXPORT void gl_draw_image(const uchar *, int x,int y,int w,int h, int d=3, int ld=0);
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#endif // !FL_gl_H
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//
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// End of "$Id$".
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//
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