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
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
|
/*************************************************************************/
/* context_gl_x11.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "context_gl_x11.h"
#ifdef X11_ENABLED
#if defined(OPENGL_ENABLED)
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#define GLX_GLXEXT_PROTOTYPES
#include <GL/glx.h>
#include <GL/glxext.h>
#define GLX_CONTEXT_MAJOR_VERSION_ARB 0x2091
#define GLX_CONTEXT_MINOR_VERSION_ARB 0x2092
typedef GLXContext (*GLXCREATECONTEXTATTRIBSARBPROC)(Display *, GLXFBConfig, GLXContext, Bool, const int *);
struct ContextGL_X11_Private {
::GLXContext glx_context;
};
void ContextGL_X11::release_current() {
glXMakeCurrent(x11_display, None, NULL);
}
void ContextGL_X11::make_current() {
glXMakeCurrent(x11_display, x11_window, p->glx_context);
}
void ContextGL_X11::swap_buffers() {
glXSwapBuffers(x11_display, x11_window);
}
static bool ctxErrorOccurred = false;
static int ctxErrorHandler(Display *dpy, XErrorEvent *ev) {
ctxErrorOccurred = true;
return 0;
}
static void set_class_hint(Display *p_display, Window p_window) {
XClassHint *classHint;
/* set the name and class hints for the window manager to use */
classHint = XAllocClassHint();
if (classHint) {
classHint->res_name = (char *)"Godot_Engine";
classHint->res_class = (char *)"Godot";
}
XSetClassHint(p_display, p_window, classHint);
XFree(classHint);
}
Error ContextGL_X11::initialize() {
//const char *extensions = glXQueryExtensionsString(x11_display, DefaultScreen(x11_display));
GLXCREATECONTEXTATTRIBSARBPROC glXCreateContextAttribsARB = (GLXCREATECONTEXTATTRIBSARBPROC)glXGetProcAddress((const GLubyte *)"glXCreateContextAttribsARB");
ERR_FAIL_COND_V(!glXCreateContextAttribsARB, ERR_UNCONFIGURED);
static int visual_attribs[] = {
GLX_RENDER_TYPE, GLX_RGBA_BIT,
GLX_DRAWABLE_TYPE, GLX_WINDOW_BIT,
GLX_DOUBLEBUFFER, true,
GLX_RED_SIZE, 1,
GLX_GREEN_SIZE, 1,
GLX_BLUE_SIZE, 1,
GLX_DEPTH_SIZE, 24,
None
};
static int visual_attribs_layered[] = {
GLX_RENDER_TYPE, GLX_RGBA_BIT,
GLX_DRAWABLE_TYPE, GLX_WINDOW_BIT,
GLX_DOUBLEBUFFER, true,
GLX_RED_SIZE, 8,
GLX_GREEN_SIZE, 8,
GLX_BLUE_SIZE, 8,
GLX_ALPHA_SIZE, 8,
GLX_DEPTH_SIZE, 24,
None
};
int fbcount;
GLXFBConfig fbconfig = 0;
XVisualInfo *vi = NULL;
XSetWindowAttributes swa;
swa.event_mask = StructureNotifyMask;
swa.border_pixel = 0;
unsigned long valuemask = CWBorderPixel | CWColormap | CWEventMask;
if (OS::get_singleton()->is_layered_allowed()) {
GLXFBConfig *fbc = glXChooseFBConfig(x11_display, DefaultScreen(x11_display), visual_attribs_layered, &fbcount);
ERR_FAIL_COND_V(!fbc, ERR_UNCONFIGURED);
for (int i = 0; i < fbcount; i++) {
vi = (XVisualInfo *)glXGetVisualFromFBConfig(x11_display, fbc[i]);
if (!vi)
continue;
XRenderPictFormat *pict_format = XRenderFindVisualFormat(x11_display, vi->visual);
if (!pict_format) {
XFree(vi);
vi = NULL;
continue;
}
fbconfig = fbc[i];
if (pict_format->direct.alphaMask > 0) {
break;
}
}
XFree(fbc);
ERR_FAIL_COND_V(!fbconfig, ERR_UNCONFIGURED);
swa.background_pixmap = None;
swa.background_pixel = 0;
swa.border_pixmap = None;
valuemask |= CWBackPixel;
} else {
GLXFBConfig *fbc = glXChooseFBConfig(x11_display, DefaultScreen(x11_display), visual_attribs, &fbcount);
ERR_FAIL_COND_V(!fbc, ERR_UNCONFIGURED);
vi = glXGetVisualFromFBConfig(x11_display, fbc[0]);
fbconfig = fbc[0];
XFree(fbc);
}
int (*oldHandler)(Display *, XErrorEvent *) = XSetErrorHandler(&ctxErrorHandler);
switch (context_type) {
case GLES_2_0_COMPATIBLE: {
p->glx_context = glXCreateNewContext(x11_display, fbconfig, GLX_RGBA_TYPE, 0, true);
ERR_FAIL_COND_V(!p->glx_context, ERR_UNCONFIGURED);
} break;
}
swa.colormap = XCreateColormap(x11_display, RootWindow(x11_display, vi->screen), vi->visual, AllocNone);
x11_window = XCreateWindow(x11_display, RootWindow(x11_display, vi->screen), 0, 0, OS::get_singleton()->get_video_mode().width, OS::get_singleton()->get_video_mode().height, 0, vi->depth, InputOutput, vi->visual, valuemask, &swa);
XStoreName(x11_display, x11_window, "Godot Engine");
ERR_FAIL_COND_V(!x11_window, ERR_UNCONFIGURED);
set_class_hint(x11_display, x11_window);
XMapWindow(x11_display, x11_window);
XSync(x11_display, False);
XSetErrorHandler(oldHandler);
glXMakeCurrent(x11_display, x11_window, p->glx_context);
XFree(vi);
return OK;
}
int ContextGL_X11::get_window_width() {
XWindowAttributes xwa;
XGetWindowAttributes(x11_display, x11_window, &xwa);
return xwa.width;
}
int ContextGL_X11::get_window_height() {
XWindowAttributes xwa;
XGetWindowAttributes(x11_display, x11_window, &xwa);
return xwa.height;
}
void ContextGL_X11::set_use_vsync(bool p_use) {
static bool setup = false;
static PFNGLXSWAPINTERVALEXTPROC glXSwapIntervalEXT = NULL;
static PFNGLXSWAPINTERVALSGIPROC glXSwapIntervalMESA = NULL;
static PFNGLXSWAPINTERVALSGIPROC glXSwapIntervalSGI = NULL;
if (!setup) {
setup = true;
String extensions = glXQueryExtensionsString(x11_display, DefaultScreen(x11_display));
if (extensions.find("GLX_EXT_swap_control") != -1)
glXSwapIntervalEXT = (PFNGLXSWAPINTERVALEXTPROC)glXGetProcAddressARB((const GLubyte *)"glXSwapIntervalEXT");
if (extensions.find("GLX_MESA_swap_control") != -1)
glXSwapIntervalMESA = (PFNGLXSWAPINTERVALSGIPROC)glXGetProcAddressARB((const GLubyte *)"glXSwapIntervalMESA");
if (extensions.find("GLX_SGI_swap_control") != -1)
glXSwapIntervalSGI = (PFNGLXSWAPINTERVALSGIPROC)glXGetProcAddressARB((const GLubyte *)"glXSwapIntervalSGI");
}
int val = p_use ? 1 : 0;
if (glXSwapIntervalMESA) {
glXSwapIntervalMESA(val);
} else if (glXSwapIntervalSGI) {
glXSwapIntervalSGI(val);
} else if (glXSwapIntervalEXT) {
GLXDrawable drawable = glXGetCurrentDrawable();
glXSwapIntervalEXT(x11_display, drawable, val);
} else
return;
use_vsync = p_use;
}
bool ContextGL_X11::is_using_vsync() const {
return use_vsync;
}
ContextGL_X11::ContextGL_X11(::Display *p_x11_display, ::Window &p_x11_window, const OS::VideoMode &p_default_video_mode, ContextType p_context_type) :
x11_window(p_x11_window) {
default_video_mode = p_default_video_mode;
x11_display = p_x11_display;
context_type = p_context_type;
double_buffer = false;
direct_render = false;
glx_minor = glx_major = 0;
p = memnew(ContextGL_X11_Private);
p->glx_context = 0;
use_vsync = false;
}
ContextGL_X11::~ContextGL_X11() {
release_current();
glXDestroyContext(x11_display, p->glx_context);
memdelete(p);
}
#endif
#endif
|