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/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the plugins of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, 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.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QDebug>
#include <QLibrary>
#include <QGLFormat>
#include "qxcbwindow.h"
#include "qxcbscreen.h"
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <GL/glx.h>
#include "qglxintegration.h"
#include "qglxconvenience.h"
#if defined(Q_OS_LINUX) || defined(Q_OS_BSD4)
#include <dlfcn.h>
#endif
QMutex QGLXContext::m_defaultSharedContextMutex(QMutex::Recursive);
QGLXContext::QGLXContext(Window window, QXcbScreen *screen, const QPlatformWindowFormat &format)
: QPlatformGLContext()
, m_screen(screen)
, m_drawable((Drawable)window)
, m_context(0)
{
Q_XCB_NOOP(m_screen->connection());
const QPlatformGLContext *sharePlatformContext;
if (format.useDefaultSharedContext()) {
if (!QPlatformGLContext::defaultSharedContext()) {
if (m_defaultSharedContextMutex.tryLock()){
createDefaultSharedContext(screen);
m_defaultSharedContextMutex.unlock();
} else {
m_defaultSharedContextMutex.lock(); //wait to the the shared context is created
m_defaultSharedContextMutex.unlock();
}
}
sharePlatformContext = QPlatformGLContext::defaultSharedContext();
} else {
sharePlatformContext = format.sharedGLContext();
}
GLXContext shareGlxContext = 0;
if (sharePlatformContext)
shareGlxContext = static_cast<const QGLXContext*>(sharePlatformContext)->glxContext();
GLXFBConfig config = qglx_findConfig(DISPLAY_FROM_XCB(screen),screen->screenNumber(),format);
m_context = glXCreateNewContext(DISPLAY_FROM_XCB(screen), config, GLX_RGBA_TYPE, shareGlxContext, TRUE);
m_windowFormat = qglx_platformWindowFromGLXFBConfig(DISPLAY_FROM_XCB(screen), config, m_context);
Q_XCB_NOOP(m_screen->connection());
}
QGLXContext::QGLXContext(QXcbScreen *screen, Drawable drawable, GLXContext context)
: QPlatformGLContext(), m_screen(screen), m_drawable(drawable), m_context(context)
{
}
QGLXContext::~QGLXContext()
{
Q_XCB_NOOP(m_screen->connection());
if (m_context)
glXDestroyContext(DISPLAY_FROM_XCB(m_screen), m_context);
Q_XCB_NOOP(m_screen->connection());
}
void QGLXContext::createDefaultSharedContext(QXcbScreen *screen)
{
Q_XCB_NOOP(screen->connection());
int x = 0;
int y = 0;
int w = 3;
int h = 3;
QPlatformWindowFormat format = QPlatformWindowFormat::defaultFormat();
GLXContext context;
GLXFBConfig config = qglx_findConfig(DISPLAY_FROM_XCB(screen),screen->screenNumber(),format);
if (config) {
XVisualInfo *visualInfo = glXGetVisualFromFBConfig(DISPLAY_FROM_XCB(screen), config);
Colormap cmap = XCreateColormap(DISPLAY_FROM_XCB(screen), screen->root(), visualInfo->visual, AllocNone);
XSetWindowAttributes a;
a.colormap = cmap;
Window sharedWindow = XCreateWindow(DISPLAY_FROM_XCB(screen), screen->root(), x, y, w, h,
0, visualInfo->depth, InputOutput, visualInfo->visual,
CWColormap, &a);
context = glXCreateNewContext(DISPLAY_FROM_XCB(screen), config, GLX_RGBA_TYPE, 0, TRUE);
QPlatformGLContext *sharedContext = new QGLXContext(screen, sharedWindow, context);
QPlatformGLContext::setDefaultSharedContext(sharedContext);
} else {
qWarning("Warning no shared context created");
}
Q_XCB_NOOP(screen->connection());
}
void QGLXContext::makeCurrent()
{
Q_XCB_NOOP(m_screen->connection());
m_screen->connection()->setEventProcessingEnabled(false);
QPlatformGLContext::makeCurrent();
glXMakeCurrent(DISPLAY_FROM_XCB(m_screen), m_drawable, m_context);
Q_XCB_NOOP(m_screen->connection());
}
void QGLXContext::doneCurrent()
{
Q_XCB_NOOP(m_screen->connection());
QPlatformGLContext::doneCurrent();
glXMakeCurrent(DISPLAY_FROM_XCB(m_screen), 0, 0);
m_screen->connection()->setEventProcessingEnabled(true);
Q_XCB_NOOP(m_screen->connection());
}
void QGLXContext::swapBuffers()
{
Q_XCB_NOOP(m_screen->connection());
glXSwapBuffers(DISPLAY_FROM_XCB(m_screen), m_drawable);
doneCurrent();
Q_XCB_NOOP(m_screen->connection());
}
void* QGLXContext::getProcAddress(const QString& procName)
{
Q_XCB_NOOP(m_screen->connection());
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(DISPLAY_FROM_XCB(m_screen), 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 glXGetProcAddressARB(reinterpret_cast<const GLubyte *>(procName.toLatin1().data()));
}
QPlatformWindowFormat QGLXContext::platformWindowFormat() const
{
return m_windowFormat;
}
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