2 // "$Id: Fl_Gl_Choice.H 7913 2010-11-29 18:18:27Z greg.ercolano $"
4 // OpenGL definitions for the Fast Light Tool Kit (FLTK).
6 // Copyright 1998-2010 by Bill Spitzak and others.
8 // This library is free software; you can redistribute it and/or
9 // modify it under the terms of the GNU Library General Public
10 // License as published by the Free Software Foundation; either
11 // version 2 of the License, or (at your option) any later version.
13 // This library is distributed in the hope that it will be useful,
14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 // Library General Public License for more details.
18 // You should have received a copy of the GNU Library General Public
19 // License along with this library; if not, write to the Free Software
20 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
23 // Please report all bugs and problems on the following page:
25 // http://www.fltk.org/str.php
28 // Internal interface to set up OpenGL.
30 // A "Fl_Gl_Choice" is created from an OpenGL mode and holds information
31 // necessary to create a window (on X) and to create an OpenGL "context"
32 // (on both X and Win32).
34 // fl_create_gl_context takes a window (necessary only on Win32) and an
35 // Fl_Gl_Choice and returns a new OpenGL context. All contexts share
36 // display lists with each other.
38 // On X another fl_create_gl_context is provided to create it for any
41 // fl_set_gl_context makes the given OpenGL context current and makes
42 // it draw into the passed window. It tracks the current one context
43 // to avoid calling the context switching code when the same context
44 // is used, though it is a mystery to me why the GLX/WGL libraries
45 // don't do this themselves...
47 // fl_no_gl_context clears that cache so the next fl_set_gl_context is
48 // guaranteed to work.
50 // fl_delete_gl_context destroys the context.
52 // This code is used by Fl_Gl_Window, gl_start(), and gl_visual()
54 #ifndef Fl_Gl_Choice_H
55 #define Fl_Gl_Choice_H
57 // Warning: whatever GLContext is defined to must take exactly the same
58 // space in a structure as a void*!!!
61 # define GLContext HGLRC
62 #elif defined(__APPLE_QUARTZ__)
63 // warning: the Quartz version should probably use Core GL (CGL) instead of AGL
64 # include <OpenGL/gl.h>
66 # define GLContext AGLContext
69 # define GLContext GLXContext
72 // Describes crap needed to create a GLContext.
79 int pixelformat; // the visual to use
80 PIXELFORMATDESCRIPTOR pfd; // some wgl calls need this thing
81 #elif defined(__APPLE_QUARTZ__)
82 // warning: the Quartz version should probably use Core GL (CGL) instead of AGL
83 AGLPixelFormat pixelformat;
85 XVisualInfo *vis; // the visual to use
86 Colormap colormap; // a colormap for that visual
88 // Return one of these structures for a given gl mode.
89 // The second argument is a glX attribute list, and is used if mode is
90 // zero. This is not supported on Win32:
91 static Fl_Gl_Choice *find(int mode, const int *);
98 GLContext fl_create_gl_context(Fl_Window*, const Fl_Gl_Choice*, int layer=0);
100 #elif defined(__APPLE_QUARTZ__)
101 // warning: the Quartz version should probably use Core GL (CGL) instead of AGL
103 GLContext fl_create_gl_context(Fl_Window*, const Fl_Gl_Choice*, int layer=0);
107 GLContext fl_create_gl_context(XVisualInfo* vis);
110 GLContext fl_create_gl_context(Fl_Window*, const Fl_Gl_Choice* g) {
111 return fl_create_gl_context(g->vis);
116 void fl_set_gl_context(Fl_Window*, GLContext);
117 void fl_no_gl_context();
118 void fl_delete_gl_context(GLContext);
123 // End of "$Id: Fl_Gl_Choice.H 7913 2010-11-29 18:18:27Z greg.ercolano $".