1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
|
//
// "$Id: Fl_Gl_Choice.H 4052 2005-02-24 21:55:12Z mike $"
//
// OpenGL definitions for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2001 by Bill Spitzak and others.
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Library General Public License for more details.
//
// You should have received a copy of the GNU Library General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA.
//
// Please report all bugs and problems to "fltk-bugs@easysw.com".
//
// Internal interface to set up OpenGL.
//
// A "Fl_Gl_Choice" is created from an OpenGL mode and holds information
// necessary to create a window (on X) and to create an OpenGL "context"
// (on both X and Win32).
//
// fl_create_gl_context takes a window (necessary only on Win32) and an
// Fl_Gl_Choice and returns a new OpenGL context. All contexts share
// display lists with each other.
//
// On X another fl_create_gl_context is provided to create it for any
// X visual.
//
// fl_set_gl_context makes the given OpenGL context current and makes
// it draw into the passed window. It tracks the current one context
// to avoid calling the context switching code when the same context
// is used, though it is a mystery to me why the GLX/WGL libraries
// don't do this themselves...
//
// fl_no_gl_context clears that cache so the next fl_set_gl_context is
// guaranteed to work.
//
// fl_delete_gl_context destroys the context.
//
// This code is used by Fl_Gl_Window, gl_start(), and gl_visual()
#ifndef Fl_Gl_Choice_H
#define Fl_Gl_Choice_H
// Warning: whatever GLContext is defined to must take exactly the same
// space in a structure as a void*!!!
#ifdef WIN32
# include <FL/gl.h>
# define GLContext HGLRC
#elif defined(__APPLE_QD__)
# include <OpenGL/gl.h>
# include <AGL/agl.h>
# define GLContext AGLContext
#elif defined(__APPLE_QUARTZ__)
// warning: the Quartz version should probably use Core GL (CGL) instead of AGL
# include <OpenGL/gl.h>
# include <AGL/agl.h>
# define GLContext AGLContext
#else
# include <GL/glx.h>
# define GLContext GLXContext
#endif
// Describes crap needed to create a GLContext.
class Fl_Gl_Choice {
int mode;
const int *alist;
Fl_Gl_Choice *next;
public:
#ifdef WIN32
int pixelformat; // the visual to use
PIXELFORMATDESCRIPTOR pfd; // some wgl calls need this thing
#elif defined(__APPLE_QD__)
AGLPixelFormat pixelformat;
#elif defined(__APPLE_QUARTZ__)
// warning: the Quartz version should probably use Core GL (CGL) instead of AGL
AGLPixelFormat pixelformat;
#else
XVisualInfo *vis; // the visual to use
Colormap colormap; // a colormap for that visual
#endif
// Return one of these structures for a given gl mode.
// The second argument is a glX attribute list, and is used if mode is
// zero. This is not supported on Win32:
static Fl_Gl_Choice *find(int mode, const int *);
};
class Fl_Window;
#ifdef WIN32
GLContext fl_create_gl_context(Fl_Window*, const Fl_Gl_Choice*, int layer=0);
#elif defined(__APPLE_QD__)
GLContext fl_create_gl_context(Fl_Window*, const Fl_Gl_Choice*, int layer=0);
#elif defined(__APPLE_QUARTZ__)
// warning: the Quartz version should probably use Core GL (CGL) instead of AGL
GLContext fl_create_gl_context(Fl_Window*, const Fl_Gl_Choice*, int layer=0);
#else
GLContext fl_create_gl_context(XVisualInfo* vis);
static inline
GLContext fl_create_gl_context(Fl_Window*, const Fl_Gl_Choice* g) {
return fl_create_gl_context(g->vis);
}
#endif
void fl_set_gl_context(Fl_Window*, GLContext);
void fl_no_gl_context();
void fl_delete_gl_context(GLContext);
#endif
//
// End of "$Id: Fl_Gl_Choice.H 4052 2005-02-24 21:55:12Z mike $".
//
|