1 /*
2 * The ManaPlus Client
3 * Copyright (C) 2014-2019 The ManaPlus Developers
4 * Copyright (C) 2019-2021 Andrei Karas
5 *
6 * This file is part of The ManaPlus Client.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * any later version.
12 *
13 * This program 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
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program. If not, see <http://www.gnu.org/licenses/>.
20 */
21
22 #include "utils/glxhelper.h"
23
24 #if defined(USE_OPENGL) && defined(USE_X11)
25
26 #include "logger.h"
27
28 #include "render/opengl/mglcheck.h"
29
30 #include "render/openglx/mglx.h"
31
32 #include "render/opengl/mgldefines.h"
33 RENDER_OPENGL_MGLDEFINES_H
34
35 #include "debug.h"
36
ErrorHandler(Display * d A_UNUSED,XErrorEvent * e A_UNUSED)37 static int ErrorHandler(Display *d A_UNUSED, XErrorEvent *e A_UNUSED)
38 {
39 return 0;
40 }
41
createContext(const unsigned long window,void * const display0,const int major,const int minor,const int profile)42 void *GlxHelper::createContext(const unsigned long window,
43 void *const display0,
44 const int major,
45 const int minor,
46 const int profile)
47 {
48 Display *const display = static_cast<Display*>(display0);
49 XSync(display, false);
50 int (*handler)(Display *, XErrorEvent *) = XSetErrorHandler(ErrorHandler);
51 void *context = mglXGetCurrentContext();
52 if (!display)
53 return context;
54 if (isGLNull(mglXGetCurrentContext)
55 || isGLNull(mglXCreateContextAttribs)
56 || isGLNull(mglXChooseFBConfig))
57 {
58 logger->log("Can't change context, functions in driver "
59 "not implemented");
60 XSetErrorHandler(handler);
61 return context;
62 }
63 if (!context)
64 {
65 logger->log("Can't change context, because current "
66 "context not created");
67 XSetErrorHandler(handler);
68 return context;
69 }
70 int glxAttribs[] =
71 {
72 GLX_RENDER_TYPE, GLX_RGBA_BIT,
73 GLX_RED_SIZE, 3,
74 GLX_GREEN_SIZE, 3,
75 GLX_BLUE_SIZE, 2,
76 GLX_DOUBLEBUFFER, 1,
77 0
78 };
79
80 int fbcount = 0;
81 GLXFBConfig *framebuffer_config = mglXChooseFBConfig(display,
82 DefaultScreen(display),
83 glxAttribs,
84 &fbcount);
85
86 if (!framebuffer_config || !fbcount)
87 {
88 logger->log("No correct fb profile found");
89 XSetErrorHandler(handler);
90 return nullptr;
91 }
92 logger->log("Found %d frame buffer contexts.", fbcount);
93
94 int attribs[] =
95 {
96 GLX_CONTEXT_MAJOR_VERSION_ARB, major,
97 GLX_CONTEXT_MINOR_VERSION_ARB, minor,
98 GLX_CONTEXT_PROFILE_MASK_ARB, profile,
99 0, 0
100 };
101
102 void *const context2 = mglXCreateContextAttribs(display,
103 framebuffer_config[0], context, true, attribs);
104 if (!context2)
105 {
106 logger->log("context %d.%d creation failed", major, minor);
107 XSetErrorHandler(handler);
108 return nullptr;
109 }
110
111 XSync(display, false);
112 XSetErrorHandler(handler);
113
114 if (!mglXMakeCurrent(display, window, context2))
115 {
116 mglXDestroyContext(display, context2);
117 logger->log("make current context %d.%d failed", major, minor);
118 return nullptr;
119 }
120
121 if (mglXGetCurrentContext() != context2)
122 {
123 mglXDestroyContext(display, context2);
124 logger->log("context cant be changed to %d.%d.", major, minor);
125 return nullptr;
126 }
127
128 // do not delete SDL context, because on exit it will crash
129 // mglXDestroyContext(display, context);
130 logger->log("Context for %d.%d created", major, minor);
131 return context2;
132 }
133
makeCurrent(const unsigned long window,void * const display,void * const context)134 bool GlxHelper::makeCurrent(const unsigned long window,
135 void *const display,
136 void *const context)
137 {
138 if (!display)
139 return false;
140 return mglXMakeCurrent(static_cast<Display*>(display), window, context);
141 }
142
143 #endif // defined(USE_OPENGL) && defined(USE_X11)
144