Added osgViewer::View::setUpViewInWindow(...) method and command line option into

osgViewer::Viewer to allow you to specify the window dimentions and screen for
the window on startup.

applications/osgviewer/osgviewer.cpp

@@ -118,12 +118,6 @@ int main(int argc, char** argv)
     // add the record camera path handler
     viewer.addEventHandler(new osgViewer::RecordCameraPathHandler);
 
-    unsigned int screenNum;
-    while (arguments.read("--screen",screenNum))
-    {
-        viewer.setUpViewOnSingleScreen(screenNum);
-    }
-
     // load the data
     osg::ref_ptr<osg::Node> loadedModel = osgDB::readNodeFiles(arguments);
     if (!loadedModel) 

include/osgViewer/View

@@ -148,6 +148,9 @@ class OSGVIEWER_EXPORT View : public osg::View, public osgGA::GUIActionAdapter
         /** Convinience method for creating slave Cameras and associated GraphicsWindows across all screens.*/
         void setUpViewAcrossAllScreens();
 
+        /** Convinience method for a single Camara on a single window.*/
+        void setUpViewInWindow(int x, int y, int width, int height, unsigned int screenNum=0);
+
         /** Convinience method for a single Camara associated with a single full screen GraphicsWindow.*/
         void setUpViewOnSingleScreen(unsigned int screenNum=0);
         

src/osgViewer/View.cpp

@@ -272,7 +272,8 @@ void View::setUpViewAcrossAllScreens()
         traits->sharedContext = 0;
         traits->sampleBuffers = ds->getMultiSamples();
         traits->samples = ds->getNumMultiSamples();
-        if (ds->getStereo() && (ds->getStereoMode() == osg::DisplaySettings::QUAD_BUFFER)) {
+        if (ds->getStereo() && (ds->getStereoMode() == osg::DisplaySettings::QUAD_BUFFER))
+        {
             traits->quadBufferStereo = true;
         }
         osg::ref_ptr<osg::GraphicsContext> gc = osg::GraphicsContext::createGraphicsContext(traits.get());
@@ -392,6 +393,61 @@ void View::setUpViewAcrossAllScreens()
     assignSceneDataToCameras();
 }
 
+void View::setUpViewInWindow(int x, int y, int width, int height, unsigned int screenNum)
+{
+    osg::DisplaySettings* ds = _displaySettings.valid() ? _displaySettings.get() : osg::DisplaySettings::instance();
+
+    osg::ref_ptr<osg::GraphicsContext::Traits> traits = new osg::GraphicsContext::Traits;
+    traits->screenNum = screenNum;
+    traits->x = x;
+    traits->y = y;
+    traits->width = width;
+    traits->height = height;
+    traits->alpha = ds->getMinimumNumAlphaBits();
+    traits->stencil = ds->getMinimumNumStencilBits();
+    traits->windowDecoration = true;
+    traits->doubleBuffer = true;
+    traits->sharedContext = 0;
+    traits->sampleBuffers = ds->getMultiSamples();
+    traits->samples = ds->getNumMultiSamples();
+    if (ds->getStereo() && (ds->getStereoMode() == osg::DisplaySettings::QUAD_BUFFER))
+    {
+        traits->quadBufferStereo = true;
+    }
+
+    osg::ref_ptr<osg::GraphicsContext> gc = osg::GraphicsContext::createGraphicsContext(traits.get());
+
+    _camera->setGraphicsContext(gc.get());
+
+    osgViewer::GraphicsWindow* gw = dynamic_cast<osgViewer::GraphicsWindow*>(gc.get());
+    if (gw)
+    {
+        osg::notify(osg::INFO)<<"View::setUpViewOnSingleScreen - GraphicsWindow has been created successfully."<<std::endl;
+        gw->getEventQueue()->getCurrentEventState()->setWindowRectangle(x, y, width, height );
+    }
+    else
+    {
+        osg::notify(osg::NOTICE)<<"  GraphicsWindow has not been created successfully."<<std::endl;
+    }
+
+    double fovy, aspectRatio, zNear, zFar;        
+    _camera->getProjectionMatrixAsPerspective(fovy, aspectRatio, zNear, zFar);
+
+    double newAspectRatio = double(traits->width) / double(traits->height);
+    double aspectRatioChange = newAspectRatio / aspectRatio;
+    if (aspectRatioChange != 1.0)
+    {
+        _camera->getProjectionMatrix() *= osg::Matrix::scale(1.0/aspectRatioChange,1.0,1.0);
+    }
+
+    _camera->setViewport(new osg::Viewport(0, 0, traits->width, traits->height));
+
+    GLenum buffer = traits->doubleBuffer ? GL_BACK : GL_FRONT;
+
+    _camera->setDrawBuffer(buffer);
+    _camera->setReadBuffer(buffer);
+}
+
 void View::setUpViewOnSingleScreen(unsigned int screenNum)
 {
     osg::GraphicsContext::WindowingSystemInterface* wsi = osg::GraphicsContext::getWindowingSystemInterface();
@@ -419,7 +475,8 @@ void View::setUpViewOnSingleScreen(unsigned int screenNum)
     traits->sharedContext = 0;
     traits->sampleBuffers = ds->getMultiSamples();
     traits->samples = ds->getNumMultiSamples();
-    if (ds->getStereo() && (ds->getStereoMode() == osg::DisplaySettings::QUAD_BUFFER)) {
+    if (ds->getStereo() && (ds->getStereoMode() == osg::DisplaySettings::QUAD_BUFFER))
+    {
         traits->quadBufferStereo = true;
     }
 

src/osgViewer/Viewer.cpp

@@ -617,6 +617,24 @@ Viewer::Viewer(osg::ArgumentParser& arguments)
         if( cnt==3 || cnt==4 ) getCamera()->setClearColor( osg::Vec4(r,g,b,a) );
         else osg::notify(osg::WARN)<<"Invalid clear color \""<<colorStr<<"\""<<std::endl;
     }
+    
+    int screenNum = -1;
+    while (arguments.read("--screen",screenNum)) {}
+    
+    int x = -1, y = -1, width = -1, height = -1;
+    while (arguments.read("--window",x,y,width,height)) {}
+
+    if (width>0 && height>0)
+    {
+        if (screenNum>=0) setUpViewInWindow(x, y, width, height, screenNum);
+        else setUpViewInWindow(x,y,width,height);
+        
+    }
+    else if (screenNum>=0)
+    {
+        setUpViewOnSingleScreen(screenNum);
+    }
+
 }
 
 void Viewer::constructorInit()