Hello, I have found a problem when building OSG with Qt 5 support. Qt has the following in the qopengl.h header:
# include <QtGui/qopengles2ext.h> # ifndef GL_DOUBLE # define GL_DOUBLE GL_FLOAT # endif # ifndef GLdouble typedef GLfloat GLdouble; # endif Unfortunately, when building for normal OpenGL (not GL/ES!) on Windows with MSVC2012, GLdouble is not defined (it is not a macro but typedef) and the code above produces a conflicting definition, making the compile fail. I am attaching a bit hackish workaround for this problem in osg/GL and reordering of #includes in GraphicsWindowQt.cpp. Regards, Jan
GL
Description: Binary data
/* -*-c++-*- OpenSceneGraph - Copyright (C) 2009 Wang Rui
*
* This library is open source and may be redistributed and/or modified under
* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
* (at your option) any later version. The full license is in LICENSE file
* included with this distribution, and on the openscenegraph.org website.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* OpenSceneGraph Public License for more details.
*/
#include <osg/DeleteHandler>
#include <osgQt/GraphicsWindowQt>
#include <osgViewer/ViewerBase>
#include <QInputEvent>
using namespace osgQt;
class QtKeyboardMap
{
public:
QtKeyboardMap()
{
mKeyMap[Qt::Key_Escape ] = osgGA::GUIEventAdapter::KEY_Escape;
mKeyMap[Qt::Key_Delete ] = osgGA::GUIEventAdapter::KEY_Delete;
mKeyMap[Qt::Key_Home ] = osgGA::GUIEventAdapter::KEY_Home;
mKeyMap[Qt::Key_Enter ] = osgGA::GUIEventAdapter::KEY_KP_Enter;
mKeyMap[Qt::Key_End ] = osgGA::GUIEventAdapter::KEY_End;
mKeyMap[Qt::Key_Return ] = osgGA::GUIEventAdapter::KEY_Return;
mKeyMap[Qt::Key_PageUp ] = osgGA::GUIEventAdapter::KEY_Page_Up;
mKeyMap[Qt::Key_PageDown ] = osgGA::GUIEventAdapter::KEY_Page_Down;
mKeyMap[Qt::Key_Left ] = osgGA::GUIEventAdapter::KEY_Left;
mKeyMap[Qt::Key_Right ] = osgGA::GUIEventAdapter::KEY_Right;
mKeyMap[Qt::Key_Up ] = osgGA::GUIEventAdapter::KEY_Up;
mKeyMap[Qt::Key_Down ] = osgGA::GUIEventAdapter::KEY_Down;
mKeyMap[Qt::Key_Backspace ] = osgGA::GUIEventAdapter::KEY_BackSpace;
mKeyMap[Qt::Key_Tab ] = osgGA::GUIEventAdapter::KEY_Tab;
mKeyMap[Qt::Key_Space ] = osgGA::GUIEventAdapter::KEY_Space;
mKeyMap[Qt::Key_Delete ] = osgGA::GUIEventAdapter::KEY_Delete;
mKeyMap[Qt::Key_Alt ] = osgGA::GUIEventAdapter::KEY_Alt_L;
mKeyMap[Qt::Key_Shift ] = osgGA::GUIEventAdapter::KEY_Shift_L;
mKeyMap[Qt::Key_Control ] = osgGA::GUIEventAdapter::KEY_Control_L;
mKeyMap[Qt::Key_Meta ] = osgGA::GUIEventAdapter::KEY_Meta_L;
mKeyMap[Qt::Key_F1 ] = osgGA::GUIEventAdapter::KEY_F1;
mKeyMap[Qt::Key_F2 ] = osgGA::GUIEventAdapter::KEY_F2;
mKeyMap[Qt::Key_F3 ] = osgGA::GUIEventAdapter::KEY_F3;
mKeyMap[Qt::Key_F4 ] = osgGA::GUIEventAdapter::KEY_F4;
mKeyMap[Qt::Key_F5 ] = osgGA::GUIEventAdapter::KEY_F5;
mKeyMap[Qt::Key_F6 ] = osgGA::GUIEventAdapter::KEY_F6;
mKeyMap[Qt::Key_F7 ] = osgGA::GUIEventAdapter::KEY_F7;
mKeyMap[Qt::Key_F8 ] = osgGA::GUIEventAdapter::KEY_F8;
mKeyMap[Qt::Key_F9 ] = osgGA::GUIEventAdapter::KEY_F9;
mKeyMap[Qt::Key_F10 ] = osgGA::GUIEventAdapter::KEY_F10;
mKeyMap[Qt::Key_F11 ] = osgGA::GUIEventAdapter::KEY_F11;
mKeyMap[Qt::Key_F12 ] = osgGA::GUIEventAdapter::KEY_F12;
mKeyMap[Qt::Key_F13 ] = osgGA::GUIEventAdapter::KEY_F13;
mKeyMap[Qt::Key_F14 ] = osgGA::GUIEventAdapter::KEY_F14;
mKeyMap[Qt::Key_F15 ] = osgGA::GUIEventAdapter::KEY_F15;
mKeyMap[Qt::Key_F16 ] = osgGA::GUIEventAdapter::KEY_F16;
mKeyMap[Qt::Key_F17 ] = osgGA::GUIEventAdapter::KEY_F17;
mKeyMap[Qt::Key_F18 ] = osgGA::GUIEventAdapter::KEY_F18;
mKeyMap[Qt::Key_F19 ] = osgGA::GUIEventAdapter::KEY_F19;
mKeyMap[Qt::Key_F20 ] = osgGA::GUIEventAdapter::KEY_F20;
mKeyMap[Qt::Key_hyphen ] = '-';
mKeyMap[Qt::Key_Equal ] = '=';
mKeyMap[Qt::Key_division ] = osgGA::GUIEventAdapter::KEY_KP_Divide;
mKeyMap[Qt::Key_multiply ] = osgGA::GUIEventAdapter::KEY_KP_Multiply;
mKeyMap[Qt::Key_Minus ] = '-';
mKeyMap[Qt::Key_Plus ] = '+';
//mKeyMap[Qt::Key_H ] = osgGA::GUIEventAdapter::KEY_KP_Home;
//mKeyMap[Qt::Key_ ] = osgGA::GUIEventAdapter::KEY_KP_Up;
//mKeyMap[92 ] = osgGA::GUIEventAdapter::KEY_KP_Page_Up;
//mKeyMap[86 ] = osgGA::GUIEventAdapter::KEY_KP_Left;
//mKeyMap[87 ] = osgGA::GUIEventAdapter::KEY_KP_Begin;
//mKeyMap[88 ] = osgGA::GUIEventAdapter::KEY_KP_Right;
//mKeyMap[83 ] = osgGA::GUIEventAdapter::KEY_KP_End;
//mKeyMap[84 ] = osgGA::GUIEventAdapter::KEY_KP_Down;
//mKeyMap[85 ] = osgGA::GUIEventAdapter::KEY_KP_Page_Down;
mKeyMap[Qt::Key_Insert ] = osgGA::GUIEventAdapter::KEY_KP_Insert;
//mKeyMap[Qt::Key_Delete ] = osgGA::GUIEventAdapter::KEY_KP_Delete;
}
~QtKeyboardMap()
{
}
int remapKey(QKeyEvent* event)
{
KeyMap::iterator itr = mKeyMap.find(event->key());
if (itr == mKeyMap.end())
{
return int(*(event->text().toLatin1().data()));
}
else
return itr->second;
}
private:
typedef std::map<unsigned int, int> KeyMap;
KeyMap mKeyMap;
};
static QtKeyboardMap s_QtKeyboardMap;
/// The object responsible for the scene re-rendering.
class HeartBeat : public QObject {
public:
int _timerId;
osg::Timer _lastFrameStartTime;
osg::observer_ptr< osgViewer::ViewerBase > _viewer;
HeartBeat();
virtual ~HeartBeat();
void init( osgViewer::ViewerBase *viewer );
void stopTimer();
void timerEvent( QTimerEvent *event );
};
static HeartBeat heartBeat;
GLWidget::GLWidget( QWidget* parent, const QGLWidget* shareWidget, Qt::WindowFlags f, bool forwardKeyEvents )
: QGLWidget(parent, shareWidget, f),
_gw( NULL ),
_forwardKeyEvents( forwardKeyEvents )
{
}
GLWidget::GLWidget( QGLContext* context, QWidget* parent, const QGLWidget* shareWidget, Qt::WindowFlags f,
bool forwardKeyEvents )
: QGLWidget(context, parent, shareWidget, f),
_gw( NULL ),
_forwardKeyEvents( forwardKeyEvents )
{
}
GLWidget::GLWidget( const QGLFormat& format, QWidget* parent, const QGLWidget* shareWidget, Qt::WindowFlags f,
bool forwardKeyEvents )
: QGLWidget(format, parent, shareWidget, f),
_gw( NULL ),
_forwardKeyEvents( forwardKeyEvents )
{
}
GLWidget::~GLWidget()
{
// close GraphicsWindowQt and remove the reference to us
if( _gw )
{
_gw->close();
_gw->_widget = NULL;
_gw = NULL;
}
}
void GLWidget::processDeferredEvents()
{
QQueue<QEvent::Type> deferredEventQueueCopy;
{
QMutexLocker lock(&_deferredEventQueueMutex);
deferredEventQueueCopy = _deferredEventQueue;
_eventCompressor.clear();
_deferredEventQueue.clear();
}
while (!deferredEventQueueCopy.isEmpty())
{
QEvent event(deferredEventQueueCopy.dequeue());
QGLWidget::event(&event);
}
}
bool GLWidget::event( QEvent* event )
{
// QEvent::Hide
//
// workaround "Qt-workaround" that does glFinish before hiding the widget
// (the Qt workaround was seen at least in Qt 4.6.3 and 4.7.0)
//
// Qt makes the context current, performs glFinish, and releases the context.
// This makes the problem in OSG multithreaded environment as the context
// is active in another thread, thus it can not be made current for the purpose
// of glFinish in this thread.
// QEvent::ParentChange
//
// Reparenting GLWidget may create a new underlying window and a new GL context.
// Qt will then call doneCurrent on the GL context about to be deleted. The thread
// where old GL context was current has no longer current context to render to and
// we cannot make new GL context current in this thread.
// We workaround above problems by deferring execution of problematic event requests.
// These events has to be enqueue and executed later in a main GUI thread (GUI operations
// outside the main thread are not allowed) just before makeCurrent is called from the
// right thread. The good place for doing that is right after swap in a swapBuffersImplementation.
if (event->type() == QEvent::Hide)
{
// enqueue only the last of QEvent::Hide and QEvent::Show
enqueueDeferredEvent(QEvent::Hide, QEvent::Show);
return true;
}
else if (event->type() == QEvent::Show)
{
// enqueue only the last of QEvent::Show or QEvent::Hide
enqueueDeferredEvent(QEvent::Show, QEvent::Hide);
return true;
}
else if (event->type() == QEvent::ParentChange)
{
// enqueue only the last QEvent::ParentChange
enqueueDeferredEvent(QEvent::ParentChange);
return true;
}
// perform regular event handling
return QGLWidget::event( event );
}
void GLWidget::setKeyboardModifiers( QInputEvent* event )
{
int modkey = event->modifiers() & (Qt::ShiftModifier | Qt::ControlModifier | Qt::AltModifier);
unsigned int mask = 0;
if ( modkey & Qt::ShiftModifier ) mask |= osgGA::GUIEventAdapter::MODKEY_SHIFT;
if ( modkey & Qt::ControlModifier ) mask |= osgGA::GUIEventAdapter::MODKEY_CTRL;
if ( modkey & Qt::AltModifier ) mask |= osgGA::GUIEventAdapter::MODKEY_ALT;
_gw->getEventQueue()->getCurrentEventState()->setModKeyMask( mask );
}
void GLWidget::resizeEvent( QResizeEvent* event )
{
const QSize& size = event->size();
_gw->resized( x(), y(), size.width(), size.height() );
_gw->getEventQueue()->windowResize( x(), y(), size.width(), size.height() );
_gw->requestRedraw();
}
void GLWidget::moveEvent( QMoveEvent* event )
{
const QPoint& pos = event->pos();
_gw->resized( pos.x(), pos.y(), width(), height() );
_gw->getEventQueue()->windowResize( pos.x(), pos.y(), width(), height() );
}
void GLWidget::glDraw()
{
_gw->requestRedraw();
}
void GLWidget::keyPressEvent( QKeyEvent* event )
{
setKeyboardModifiers( event );
int value = s_QtKeyboardMap.remapKey( event );
_gw->getEventQueue()->keyPress( value );
// this passes the event to the regular Qt key event processing,
// among others, it closes popup windows on ESC and forwards the event to the parent widgets
if( _forwardKeyEvents )
inherited::keyPressEvent( event );
}
void GLWidget::keyReleaseEvent( QKeyEvent* event )
{
setKeyboardModifiers( event );
int value = s_QtKeyboardMap.remapKey( event );
_gw->getEventQueue()->keyRelease( value );
// this passes the event to the regular Qt key event processing,
// among others, it closes popup windows on ESC and forwards the event to the parent widgets
if( _forwardKeyEvents )
inherited::keyReleaseEvent( event );
}
void GLWidget::mousePressEvent( QMouseEvent* event )
{
int button = 0;
switch ( event->button() )
{
case Qt::LeftButton: button = 1; break;
case Qt::MidButton: button = 2; break;
case Qt::RightButton: button = 3; break;
case Qt::NoButton: button = 0; break;
default: button = 0; break;
}
setKeyboardModifiers( event );
_gw->getEventQueue()->mouseButtonPress( event->x(), event->y(), button );
}
void GLWidget::mouseReleaseEvent( QMouseEvent* event )
{
int button = 0;
switch ( event->button() )
{
case Qt::LeftButton: button = 1; break;
case Qt::MidButton: button = 2; break;
case Qt::RightButton: button = 3; break;
case Qt::NoButton: button = 0; break;
default: button = 0; break;
}
setKeyboardModifiers( event );
_gw->getEventQueue()->mouseButtonRelease( event->x(), event->y(), button );
}
void GLWidget::mouseDoubleClickEvent( QMouseEvent* event )
{
int button = 0;
switch ( event->button() )
{
case Qt::LeftButton: button = 1; break;
case Qt::MidButton: button = 2; break;
case Qt::RightButton: button = 3; break;
case Qt::NoButton: button = 0; break;
default: button = 0; break;
}
setKeyboardModifiers( event );
_gw->getEventQueue()->mouseDoubleButtonPress( event->x(), event->y(), button );
}
void GLWidget::mouseMoveEvent( QMouseEvent* event )
{
setKeyboardModifiers( event );
_gw->getEventQueue()->mouseMotion( event->x(), event->y() );
}
void GLWidget::wheelEvent( QWheelEvent* event )
{
setKeyboardModifiers( event );
_gw->getEventQueue()->mouseScroll(
event->orientation() == Qt::Vertical ?
(event->delta()>0 ? osgGA::GUIEventAdapter::SCROLL_UP : osgGA::GUIEventAdapter::SCROLL_DOWN) :
(event->delta()>0 ? osgGA::GUIEventAdapter::SCROLL_LEFT : osgGA::GUIEventAdapter::SCROLL_RIGHT) );
}
GraphicsWindowQt::GraphicsWindowQt( osg::GraphicsContext::Traits* traits, QWidget* parent, const QGLWidget* shareWidget, Qt::WindowFlags f )
: _realized(false)
{
_widget = NULL;
_traits = traits;
init( parent, shareWidget, f );
}
GraphicsWindowQt::GraphicsWindowQt( GLWidget* widget )
: _realized(false)
{
_widget = widget;
_traits = _widget ? createTraits( _widget ) : new osg::GraphicsContext::Traits;
init( NULL, NULL, 0 );
}
GraphicsWindowQt::~GraphicsWindowQt()
{
close();
// remove reference from GLWidget
if ( _widget )
_widget->_gw = NULL;
}
bool GraphicsWindowQt::init( QWidget* parent, const QGLWidget* shareWidget, Qt::WindowFlags f )
{
// update _widget and parent by WindowData
WindowData* windowData = _traits.get() ? dynamic_cast<WindowData*>(_traits->inheritedWindowData.get()) : 0;
if ( !_widget )
_widget = windowData ? windowData->_widget : NULL;
if ( !parent )
parent = windowData ? windowData->_parent : NULL;
// create widget if it does not exist
_ownsWidget = _widget == NULL;
if ( !_widget )
{
// shareWidget
if ( !shareWidget ) {
GraphicsWindowQt* sharedContextQt = dynamic_cast<GraphicsWindowQt*>(_traits->sharedContext.get());
if ( sharedContextQt )
shareWidget = sharedContextQt->getGLWidget();
}
// WindowFlags
Qt::WindowFlags flags = f | Qt::Window | Qt::CustomizeWindowHint;
if ( _traits->windowDecoration )
flags |= Qt::WindowTitleHint | Qt::WindowMinMaxButtonsHint | Qt::WindowSystemMenuHint
#if (QT_VERSION_CHECK(4, 5, 0) <= QT_VERSION)
| Qt::WindowCloseButtonHint
#endif
;
// create widget
_widget = new GLWidget( traits2qglFormat( _traits.get() ), parent, shareWidget, flags );
}
// set widget name and position
// (do not set it when we inherited the widget)
if ( _ownsWidget )
{
_widget->setWindowTitle( _traits->windowName.c_str() );
_widget->move( _traits->x, _traits->y );
if ( !_traits->supportsResize ) _widget->setFixedSize( _traits->width, _traits->height );
else _widget->resize( _traits->width, _traits->height );
}
// initialize widget properties
_widget->setAutoBufferSwap( false );
_widget->setMouseTracking( true );
_widget->setFocusPolicy( Qt::WheelFocus );
_widget->setGraphicsWindow( this );
useCursor( _traits->useCursor );
// initialize State
setState( new osg::State );
getState()->setGraphicsContext(this);
// initialize contextID
if ( _traits.valid() && _traits->sharedContext.valid() )
{
getState()->setContextID( _traits->sharedContext->getState()->getContextID() );
incrementContextIDUsageCount( getState()->getContextID() );
}
else
{
getState()->setContextID( osg::GraphicsContext::createNewContextID() );
}
// make sure the event queue has the correct window rectangle size and input range
getEventQueue()->syncWindowRectangleWithGraphcisContext();
return true;
}
QGLFormat GraphicsWindowQt::traits2qglFormat( const osg::GraphicsContext::Traits* traits )
{
QGLFormat format( QGLFormat::defaultFormat() );
format.setAlphaBufferSize( traits->alpha );
format.setRedBufferSize( traits->red );
format.setGreenBufferSize( traits->green );
format.setBlueBufferSize( traits->blue );
format.setDepthBufferSize( traits->depth );
format.setStencilBufferSize( traits->stencil );
format.setSampleBuffers( traits->sampleBuffers );
format.setSamples( traits->samples );
format.setAlpha( traits->alpha>0 );
format.setDepth( traits->depth>0 );
format.setStencil( traits->stencil>0 );
format.setDoubleBuffer( traits->doubleBuffer );
format.setSwapInterval( traits->vsync ? 1 : 0 );
format.setStereo( traits->quadBufferStereo ? 1 : 0 );
return format;
}
void GraphicsWindowQt::qglFormat2traits( const QGLFormat& format, osg::GraphicsContext::Traits* traits )
{
traits->red = format.redBufferSize();
traits->green = format.greenBufferSize();
traits->blue = format.blueBufferSize();
traits->alpha = format.alpha() ? format.alphaBufferSize() : 0;
traits->depth = format.depth() ? format.depthBufferSize() : 0;
traits->stencil = format.stencil() ? format.stencilBufferSize() : 0;
traits->sampleBuffers = format.sampleBuffers() ? 1 : 0;
traits->samples = format.samples();
traits->quadBufferStereo = format.stereo();
traits->doubleBuffer = format.doubleBuffer();
traits->vsync = format.swapInterval() >= 1;
}
osg::GraphicsContext::Traits* GraphicsWindowQt::createTraits( const QGLWidget* widget )
{
osg::GraphicsContext::Traits *traits = new osg::GraphicsContext::Traits;
qglFormat2traits( widget->format(), traits );
QRect r = widget->geometry();
traits->x = r.x();
traits->y = r.y();
traits->width = r.width();
traits->height = r.height();
traits->windowName = widget->windowTitle().toLocal8Bit().data();
Qt::WindowFlags f = widget->windowFlags();
traits->windowDecoration = ( f & Qt::WindowTitleHint ) &&
( f & Qt::WindowMinMaxButtonsHint ) &&
( f & Qt::WindowSystemMenuHint );
QSizePolicy sp = widget->sizePolicy();
traits->supportsResize = sp.horizontalPolicy() != QSizePolicy::Fixed ||
sp.verticalPolicy() != QSizePolicy::Fixed;
return traits;
}
bool GraphicsWindowQt::setWindowRectangleImplementation( int x, int y, int width, int height )
{
if ( _widget == NULL )
return false;
_widget->setGeometry( x, y, width, height );
return true;
}
void GraphicsWindowQt::getWindowRectangle( int& x, int& y, int& width, int& height )
{
if ( _widget )
{
const QRect& geom = _widget->geometry();
x = geom.x();
y = geom.y();
width = geom.width();
height = geom.height();
}
}
bool GraphicsWindowQt::setWindowDecorationImplementation( bool windowDecoration )
{
Qt::WindowFlags flags = Qt::Window|Qt::CustomizeWindowHint;//|Qt::WindowStaysOnTopHint;
if ( windowDecoration )
flags |= Qt::WindowTitleHint|Qt::WindowMinMaxButtonsHint|Qt::WindowSystemMenuHint;
_traits->windowDecoration = windowDecoration;
if ( _widget )
{
_widget->setWindowFlags( flags );
return true;
}
return false;
}
bool GraphicsWindowQt::getWindowDecoration() const
{
return _traits->windowDecoration;
}
void GraphicsWindowQt::grabFocus()
{
if ( _widget )
_widget->setFocus( Qt::ActiveWindowFocusReason );
}
void GraphicsWindowQt::grabFocusIfPointerInWindow()
{
if ( _widget->underMouse() )
_widget->setFocus( Qt::ActiveWindowFocusReason );
}
void GraphicsWindowQt::raiseWindow()
{
if ( _widget )
_widget->raise();
}
void GraphicsWindowQt::setWindowName( const std::string& name )
{
if ( _widget )
_widget->setWindowTitle( name.c_str() );
}
std::string GraphicsWindowQt::getWindowName()
{
return _widget ? _widget->windowTitle().toStdString() : "";
}
void GraphicsWindowQt::useCursor( bool cursorOn )
{
if ( _widget )
{
_traits->useCursor = cursorOn;
if ( !cursorOn ) _widget->setCursor( Qt::BlankCursor );
else _widget->setCursor( _currentCursor );
}
}
void GraphicsWindowQt::setCursor( MouseCursor cursor )
{
if ( cursor==InheritCursor && _widget )
{
_widget->unsetCursor();
}
switch ( cursor )
{
case NoCursor: _currentCursor = Qt::BlankCursor; break;
case RightArrowCursor: case LeftArrowCursor: _currentCursor = Qt::ArrowCursor; break;
case InfoCursor: _currentCursor = Qt::SizeAllCursor; break;
case DestroyCursor: _currentCursor = Qt::ForbiddenCursor; break;
case HelpCursor: _currentCursor = Qt::WhatsThisCursor; break;
case CycleCursor: _currentCursor = Qt::ForbiddenCursor; break;
case SprayCursor: _currentCursor = Qt::SizeAllCursor; break;
case WaitCursor: _currentCursor = Qt::WaitCursor; break;
case TextCursor: _currentCursor = Qt::IBeamCursor; break;
case CrosshairCursor: _currentCursor = Qt::CrossCursor; break;
case HandCursor: _currentCursor = Qt::OpenHandCursor; break;
case UpDownCursor: _currentCursor = Qt::SizeVerCursor; break;
case LeftRightCursor: _currentCursor = Qt::SizeHorCursor; break;
case TopSideCursor: case BottomSideCursor: _currentCursor = Qt::UpArrowCursor; break;
case LeftSideCursor: case RightSideCursor: _currentCursor = Qt::SizeHorCursor; break;
case TopLeftCorner: _currentCursor = Qt::SizeBDiagCursor; break;
case TopRightCorner: _currentCursor = Qt::SizeFDiagCursor; break;
case BottomRightCorner: _currentCursor = Qt::SizeBDiagCursor; break;
case BottomLeftCorner: _currentCursor = Qt::SizeFDiagCursor; break;
default: break;
};
if ( _widget ) _widget->setCursor( _currentCursor );
}
bool GraphicsWindowQt::valid() const
{
return _widget && _widget->isValid();
}
bool GraphicsWindowQt::realizeImplementation()
{
// save the current context
// note: this will save only Qt-based contexts
const QGLContext *savedContext = QGLContext::currentContext();
// initialize GL context for the widget
if ( !valid() )
_widget->glInit();
// make current
_realized = true;
bool result = makeCurrent();
_realized = false;
// fail if we do not have current context
if ( !result )
{
if ( savedContext )
const_cast< QGLContext* >( savedContext )->makeCurrent();
OSG_WARN << "Window realize: Can make context current." << std::endl;
return false;
}
_realized = true;
// make sure the event queue has the correct window rectangle size and input range
getEventQueue()->syncWindowRectangleWithGraphcisContext();
// make this window's context not current
// note: this must be done as we will probably make the context current from another thread
// and it is not allowed to have one context current in two threads
if( !releaseContext() )
OSG_WARN << "Window realize: Can not release context." << std::endl;
// restore previous context
if ( savedContext )
const_cast< QGLContext* >( savedContext )->makeCurrent();
return true;
}
bool GraphicsWindowQt::isRealizedImplementation() const
{
return _realized;
}
void GraphicsWindowQt::closeImplementation()
{
if ( _widget )
_widget->close();
_realized = false;
}
void GraphicsWindowQt::runOperations()
{
// While in graphics thread this is last chance to do something useful before
// graphics thread will execute its operations.
if (_widget->getNumDeferredEvents() > 0)
_widget->processDeferredEvents();
if (QGLContext::currentContext() != _widget->context())
_widget->makeCurrent();
GraphicsWindow::runOperations();
}
bool GraphicsWindowQt::makeCurrentImplementation()
{
if (_widget->getNumDeferredEvents() > 0)
_widget->processDeferredEvents();
_widget->makeCurrent();
return true;
}
bool GraphicsWindowQt::releaseContextImplementation()
{
_widget->doneCurrent();
return true;
}
void GraphicsWindowQt::swapBuffersImplementation()
{
_widget->swapBuffers();
// FIXME: the processDeferredEvents should really be executed in a GUI (main) thread context but
// I couln't find any reliable way to do this. For now, lets hope non of *GUI thread only operations* will
// be executed in a QGLWidget::event handler. On the other hand, calling GUI only operations in the
// QGLWidget event handler is an indication of a Qt bug.
if (_widget->getNumDeferredEvents() > 0)
_widget->processDeferredEvents();
// We need to call makeCurrent here to restore our previously current context
// which may be changed by the processDeferredEvents function.
if (QGLContext::currentContext() != _widget->context())
_widget->makeCurrent();
}
void GraphicsWindowQt::requestWarpPointer( float x, float y )
{
if ( _widget )
QCursor::setPos( _widget->mapToGlobal(QPoint((int)x,(int)y)) );
}
class QtWindowingSystem : public osg::GraphicsContext::WindowingSystemInterface
{
public:
QtWindowingSystem()
{
OSG_INFO << "QtWindowingSystemInterface()" << std::endl;
}
~QtWindowingSystem()
{
if (osg::Referenced::getDeleteHandler())
{
osg::Referenced::getDeleteHandler()->setNumFramesToRetainObjects(0);
osg::Referenced::getDeleteHandler()->flushAll();
}
}
// Access the Qt windowing system through this singleton class.
static QtWindowingSystem* getInterface()
{
static QtWindowingSystem* qtInterface = new QtWindowingSystem;
return qtInterface;
}
// Return the number of screens present in the system
virtual unsigned int getNumScreens( const osg::GraphicsContext::ScreenIdentifier& si )
{
OSG_WARN << "osgQt: getNumScreens() not implemented yet." << std::endl;
return 0;
}
// Return the resolution of specified screen
// (0,0) is returned if screen is unknown
virtual void getScreenSettings( const osg::GraphicsContext::ScreenIdentifier& si, osg::GraphicsContext::ScreenSettings & resolution )
{
OSG_WARN << "osgQt: getScreenSettings() not implemented yet." << std::endl;
}
// Set the resolution for given screen
virtual bool setScreenSettings( const osg::GraphicsContext::ScreenIdentifier& si, const osg::GraphicsContext::ScreenSettings & resolution )
{
OSG_WARN << "osgQt: setScreenSettings() not implemented yet." << std::endl;
return false;
}
// Enumerates available resolutions
virtual void enumerateScreenSettings( const osg::GraphicsContext::ScreenIdentifier& screenIdentifier, osg::GraphicsContext::ScreenSettingsList & resolution )
{
OSG_WARN << "osgQt: enumerateScreenSettings() not implemented yet." << std::endl;
}
// Create a graphics context with given traits
virtual osg::GraphicsContext* createGraphicsContext( osg::GraphicsContext::Traits* traits )
{
if (traits->pbuffer)
{
OSG_WARN << "osgQt: createGraphicsContext - pbuffer not implemented yet." << std::endl;
return NULL;
}
else
{
osg::ref_ptr< GraphicsWindowQt > window = new GraphicsWindowQt( traits );
if (window->valid()) return window.release();
else return NULL;
}
}
private:
// No implementation for these
QtWindowingSystem( const QtWindowingSystem& );
QtWindowingSystem& operator=( const QtWindowingSystem& );
};
// declare C entry point for static compilation.
extern "C" void OSGQT_EXPORT graphicswindow_Qt(void)
{
osg::GraphicsContext::setWindowingSystemInterface(QtWindowingSystem::getInterface());
}
void osgQt::initQtWindowingSystem()
{
graphicswindow_Qt();
}
void osgQt::setViewer( osgViewer::ViewerBase *viewer )
{
heartBeat.init( viewer );
}
/// Constructor. Must be called from main thread.
HeartBeat::HeartBeat() : _timerId( 0 )
{
}
/// Destructor. Must be called from main thread.
HeartBeat::~HeartBeat()
{
stopTimer();
}
void HeartBeat::stopTimer()
{
if ( _timerId != 0 )
{
killTimer( _timerId );
_timerId = 0;
}
}
/// Initializes the loop for viewer. Must be called from main thread.
void HeartBeat::init( osgViewer::ViewerBase *viewer )
{
if( _viewer == viewer )
return;
stopTimer();
_viewer = viewer;
if( viewer )
{
_timerId = startTimer( 0 );
_lastFrameStartTime.setStartTick( 0 );
}
}
void HeartBeat::timerEvent( QTimerEvent *event )
{
osg::ref_ptr< osgViewer::ViewerBase > viewer;
if( !_viewer.lock( viewer ) )
{
// viewer has been deleted -> stop timer
stopTimer();
return;
}
// limit the frame rate
if( viewer->getRunMaxFrameRate() > 0.0)
{
double dt = _lastFrameStartTime.time_s();
double minFrameTime = 1.0 / viewer->getRunMaxFrameRate();
if (dt < minFrameTime)
OpenThreads::Thread::microSleep(static_cast<unsigned int>(1000000.0*(minFrameTime-dt)));
}
else
{
// avoid excessive CPU loading when no frame is required in ON_DEMAND mode
if( viewer->getRunFrameScheme() == osgViewer::ViewerBase::ON_DEMAND )
{
double dt = _lastFrameStartTime.time_s();
if (dt < 0.01)
OpenThreads::Thread::microSleep(static_cast<unsigned int>(1000000.0*(0.01-dt)));
}
// record start frame time
_lastFrameStartTime.setStartTick();
// make frame
if( viewer->getRunFrameScheme() == osgViewer::ViewerBase::ON_DEMAND )
{
if( viewer->checkNeedToDoFrame() )
{
viewer->frame();
}
}
else
{
viewer->frame();
}
}
}
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