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
133
134
|
//
// "$Id: gl_start.cxx 5190 2006-06-09 16:16:34Z mike $"
//
// OpenGL context routines for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2005 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 on the following page:
//
// http://www.fltk.org/str.php
//
// You MUST use gl_visual() to select the default visual before doing
// show() of any windows. Mesa will crash if you try to use a visual
// not returned by glxChooseVisual.
// 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)
#include <config.h>
#if HAVE_GL
#include <FL/Fl.H>
#include <FL/Fl_Window.H>
#include <FL/x.H>
#include <FL/fl_draw.H>
#include "Fl_Gl_Choice.H"
extern int fl_clip_state_number; // in fl_rect.cxx
static GLContext context;
static int clip_state_number=-1;
static int pw, ph;
#ifdef WIN32
static Fl_Gl_Choice* gl_choice;
#endif
#ifdef __APPLE__
static Fl_Gl_Choice* gl_choice;
#endif
Fl_Region XRectangleRegion(int x, int y, int w, int h); // in fl_rect.cxx
void gl_start() {
if (!context) {
#ifdef WIN32
if (!gl_choice) Fl::gl_visual(0);
context = fl_create_gl_context(Fl_Window::current(), gl_choice);
#elif defined(__APPLE_QD__)
// \todo Mac : We need to check the code and verify it with Apple Sample code. The 'shiny'-test should at least work with the software OpenGL emulator
context = fl_create_gl_context(Fl_Window::current(), gl_choice);
#elif defined(__APPLE_QUARTZ__)
// warning: the Quartz version should probably use Core GL (CGL) instead of AGL
context = fl_create_gl_context(Fl_Window::current(), gl_choice);
#else
context = fl_create_gl_context(fl_visual);
#endif
}
fl_set_gl_context(Fl_Window::current(), context);
#if !defined(WIN32) && !defined(__APPLE__)
glXWaitX();
#endif
if (pw != Fl_Window::current()->w() || ph != Fl_Window::current()->h()) {
pw = Fl_Window::current()->w();
ph = Fl_Window::current()->h();
glLoadIdentity();
glViewport(0, 0, pw, ph);
glOrtho(0, pw, 0, ph, -1, 1);
glDrawBuffer(GL_FRONT);
}
if (clip_state_number != fl_clip_state_number) {
clip_state_number = fl_clip_state_number;
int x, y, w, h;
if (fl_clip_box(0, 0, Fl_Window::current()->w(), Fl_Window::current()->h(),
x, y, w, h)) {
fl_clip_region(XRectangleRegion(x,y,w,h));
glScissor(x, Fl_Window::current()->h()-(y+h), w, h);
glEnable(GL_SCISSOR_TEST);
} else {
glDisable(GL_SCISSOR_TEST);
}
}
}
void gl_finish() {
glFlush();
#if !defined(WIN32) && !defined(__APPLE__)
glXWaitGL();
#endif
}
int Fl::gl_visual(int mode, int *alist) {
Fl_Gl_Choice *c = Fl_Gl_Choice::find(mode,alist);
if (!c) return 0;
#ifdef WIN32
gl_choice = c;
#elif defined(__APPLE_QD__)
gl_choice = c;
#elif defined(__APPLE_QUARTZ__)
// warning: the Quartz version should probably use Core GL (CGL) instead of AGL
gl_choice = c;
#else
fl_visual = c->vis;
fl_colormap = c->colormap;
#endif
return 1;
}
#endif
//
// End of "$Id: gl_start.cxx 5190 2006-06-09 16:16:34Z mike $".
//
|