1/****************************************************************************
2**
3** Copyright (C) 2016 The Qt Company Ltd.
4** Contact: https://www.qt.io/licensing/
5**
6** This file is part of the plugins of the Qt Toolkit.
7**
8** $QT_BEGIN_LICENSE:LGPL$
9** Commercial License Usage
10** Licensees holding valid commercial Qt licenses may use this file in
11** accordance with the commercial license agreement provided with the
12** Software or, alternatively, in accordance with the terms contained in
13** a written agreement between you and The Qt Company. For licensing terms
14** and conditions see https://www.qt.io/terms-conditions. For further
15** information use the contact form at https://www.qt.io/contact-us.
16**
17** GNU Lesser General Public License Usage
18** Alternatively, this file may be used under the terms of the GNU Lesser
19** General Public License version 3 as published by the Free Software
20** Foundation and appearing in the file LICENSE.LGPL3 included in the
21** packaging of this file. Please review the following information to
22** ensure the GNU Lesser General Public License version 3 requirements
23** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
24**
25** GNU General Public License Usage
26** Alternatively, this file may be used under the terms of the GNU
27** General Public License version 2.0 or (at your option) the GNU General
28** Public license version 3 or any later version approved by the KDE Free
29** Qt Foundation. The licenses are as published by the Free Software
30** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
31** included in the packaging of this file. Please review the following
32** information to ensure the GNU General Public License requirements will
33** be met: https://www.gnu.org/licenses/gpl-2.0.html and
34** https://www.gnu.org/licenses/gpl-3.0.html.
35**
36** $QT_END_LICENSE$
37**
38****************************************************************************/
39
40#include "qxcbglxwindow.h"
41
42#include "qxcbscreen.h"
43#include <QtGlxSupport/private/qglxconvenience_p.h>
44#include <QDebug>
45
46QT_BEGIN_NAMESPACE
47
48QXcbGlxWindow::QXcbGlxWindow(QWindow *window)
49 : QXcbWindow(window)
50{
51}
52
53QXcbGlxWindow::~QXcbGlxWindow()
54{
55}
56
57const xcb_visualtype_t *QXcbGlxWindow::createVisual()
58{
59 QXcbScreen *scr = xcbScreen();
60 if (!scr)
61 return QXcbWindow::createVisual();
62
63 qCDebug(lcQpaGl) << "Requested format before FBConfig/Visual selection:" << m_format;
64
65 Display *dpy = static_cast<Display *>(scr->connection()->xlib_display());
66 const char *glxExts = glXQueryExtensionsString(dpy, screen: scr->screenNumber());
67 int flags = 0;
68 if (glxExts) {
69 qCDebug(lcQpaGl, "Available GLX extensions: %s", glxExts);
70 if (strstr(haystack: glxExts, needle: "GLX_EXT_framebuffer_sRGB") || strstr(haystack: glxExts, needle: "GLX_ARB_framebuffer_sRGB"))
71 flags |= QGLX_SUPPORTS_SRGB;
72 }
73
74 const auto formatBackup = m_format;
75 XVisualInfo *visualInfo = qglx_findVisualInfo(display: dpy, screen: scr->screenNumber(), format: &m_format, GLX_WINDOW_BIT, flags);
76 if (!visualInfo) {
77 qCDebug(lcQpaGl) << "No XVisualInfo for format" << m_format;
78 // restore initial format before requesting it again
79 m_format = formatBackup;
80 return QXcbWindow::createVisual();
81 }
82 const xcb_visualtype_t *xcb_visualtype = scr->visualForId(visualid: visualInfo->visualid);
83 XFree(visualInfo);
84
85 qCDebug(lcQpaGl) << "Got format:" << m_format;
86
87 return xcb_visualtype;
88}
89
90QT_END_NAMESPACE
91

source code of qtbase/src/plugins/platforms/xcb/gl_integrations/xcb_glx/qxcbglxwindow.cpp