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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** This file is part of the plugins of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QDebug>
#include <QLibrary>
#include <QGLFormat>
#include "qxlibwindow.h"
#include "qxlibscreen.h"
#include "qxlibdisplay.h"
#if !defined(QT_NO_OPENGL) && !defined(QT_OPENGL_ES_2)
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <GL/glx.h>
#include "private/qglxconvenience_p.h"
#include "qglxintegration.h"
#if defined(Q_OS_LINUX) || defined(Q_OS_BSD4)
#include <dlfcn.h>
#endif
QT_BEGIN_NAMESPACE
QGLXContext::QGLXContext(QXlibScreen *screen, const QSurfaceFormat &format, QPlatformOpenGLContext *share)
: QPlatformOpenGLContext()
, m_screen(screen)
, m_context(0)
{
GLXContext shareGlxContext = 0;
if (share)
shareGlxContext = static_cast<const QGLXContext*>(share)->glxContext();
Display *xDisplay = screen->display()->nativeDisplay();
GLXFBConfig config = qglx_findConfig(xDisplay,screen->xScreenNumber(),format);
if (config) {
m_context = glXCreateNewContext(xDisplay,config,GLX_RGBA_TYPE,shareGlxContext,TRUE);
m_windowFormat = qglx_surfaceFormatFromGLXFBConfig(xDisplay,config,m_context);
} else {
XVisualInfo *visualInfo = qglx_findVisualInfo(xDisplay, screen->xScreenNumber(), format);
if (!visualInfo)
qFatal("Could not initialize GLX");
m_context = glXCreateContext(xDisplay, visualInfo, shareGlxContext, true);
XFree(visualInfo);
}
#ifdef MYX11_DEBUG
qDebug() << "QGLXGLContext::create context" << m_context;
#endif
}
QGLXContext::~QGLXContext()
{
if (m_context) {
qDebug("Destroying GLX context 0x%p", m_context);
glXDestroyContext(m_screen->display()->nativeDisplay(), m_context);
}
}
QSurfaceFormat QGLXContext::format() const
{
return m_windowFormat;
}
bool QGLXContext::makeCurrent(QPlatformSurface *surface)
{
Q_UNUSED(surface);
GLXDrawable glxDrawable = static_cast<QXlibWindow *>(surface)->winId();
#ifdef MYX11_DEBUG
qDebug("QGLXGLContext::makeCurrent(window=0x%x, ctx=0x%x)", glxDrawable, m_context);
#endif
return glXMakeCurrent(m_screen->display()->nativeDisplay(), glxDrawable, m_context);
}
void QGLXContext::doneCurrent()
{
glXMakeCurrent(m_screen->display()->nativeDisplay(), 0, 0);
}
void QGLXContext::swapBuffers(QPlatformSurface *surface)
{
Q_UNUSED(surface);
GLXDrawable glxDrawable = static_cast<QXlibWindow *>(surface)->winId();
glXSwapBuffers(m_screen->display()->nativeDisplay(), glxDrawable);
}
void (*QGLXContext::getProcAddress(const QByteArray& procName))()
{
typedef void *(*qt_glXGetProcAddressARB)(const GLubyte *);
static qt_glXGetProcAddressARB glXGetProcAddressARB = 0;
static bool resolved = false;
if (resolved && !glXGetProcAddressARB)
return 0;
if (!glXGetProcAddressARB) {
QList<QByteArray> glxExt = QByteArray(glXGetClientString(m_screen->display()->nativeDisplay(), GLX_EXTENSIONS)).split(' ');
if (glxExt.contains("GLX_ARB_get_proc_address")) {
#if defined(Q_OS_LINUX) || defined(Q_OS_BSD4)
void *handle = dlopen(NULL, RTLD_LAZY);
if (handle) {
glXGetProcAddressARB = (qt_glXGetProcAddressARB) dlsym(handle, "glXGetProcAddressARB");
dlclose(handle);
}
if (!glXGetProcAddressARB)
#endif
{
extern const QString qt_gl_library_name();
// QLibrary lib(qt_gl_library_name());
QLibrary lib(QLatin1String("GL"));
glXGetProcAddressARB = (qt_glXGetProcAddressARB) lib.resolve("glXGetProcAddressARB");
}
}
resolved = true;
}
if (!glXGetProcAddressARB)
return 0;
return (void (*)())glXGetProcAddressARB(reinterpret_cast<const GLubyte *>(procName.constData()));
}
QSurfaceFormat QGLXContext::surfaceFormat() const
{
return m_windowFormat;
}
QT_END_NAMESPACE
#endif //!defined(QT_NO_OPENGL) && !defined(QT_OPENGL_ES_2)
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