Changed OsgCameraGroup so that it shares osg::State between Producer::Camera's which

share the same Producer::RenderSurface.

Added support for more colors in slideshow3D's constructor code.

examples/osgwindows/osgwindows.cpp

@@ -15,6 +15,9 @@
 
 static Producer::CameraConfig *BuildConfig(void)
 {
+#define TWO_SEPERATE_WINDOWS
+
+#ifdef TWO_SEPERATE_WINDOWS
     Producer::RenderSurface *rs1 = new Producer::RenderSurface;
     rs1->setScreenNum(0);
     rs1->setWindowName("osgwindows");
@@ -45,6 +48,32 @@ static Producer::CameraConfig *BuildConfig(void)
     cfg->addCamera("Camera 2", camera2);
     cfg->setInputArea(ia);
     return cfg;
+
+#else
+    // one window with four camera's.
+    Producer::Camera* pcam1 = new Producer::Camera ();
+    pcam1->setProjectionRectangle (0.0f, 0.5f, 0.5f, 1.0f);
+   
+    Producer::Camera* pcam2 = new Producer::Camera ();
+    pcam2->setRenderSurface (pcam1->getRenderSurface ());
+    pcam2->setProjectionRectangle (0.5f, 1.0f, 0.5f, 1.0f);
+
+    Producer::Camera* pcam3 = new Producer::Camera ();
+    pcam3->setRenderSurface (pcam1->getRenderSurface ());
+    pcam3->setProjectionRectangle (0.0f, 0.5f, 0.0f, 0.5f);
+
+    Producer::Camera* pcam4 = new Producer::Camera ();
+    pcam4->setRenderSurface (pcam1->getRenderSurface ());
+    pcam4->setProjectionRectangle (0.5f, 1.0f, 0.0f, 0.5f);
+
+    Producer::CameraConfig *cfg = new Producer::CameraConfig;
+    cfg->addCamera("Camera 1",pcam1);
+    cfg->addCamera("Camera 2",pcam2);
+    cfg->addCamera("Camera 3",pcam3);
+    cfg->addCamera("Camera 4",pcam4);
+    
+    return cfg;
+#endif
 }
 
 int main( int argc, char **argv )

examples/slideshow3D/ReaderWriterXML.cpp

@@ -17,7 +17,17 @@
 class ReaderWriterSS3D : public osgDB::ReaderWriter
 {
 public:
-    ReaderWriterSS3D() { }
+    ReaderWriterSS3D()
+    {
+        _colorMap["WHITE"]  .set(1.0f,1.0f,1.0f,1.0f);
+        _colorMap["BLACK"]  .set(0.0f,0.0f,0.0f,1.0f);
+        _colorMap["PURPLE"] .set(1.0f,0.0f,1.0f,1.0f);
+        _colorMap["BLUE"]   .set(0.0f,0.0f,1.0f,1.0f);
+        _colorMap["RED"]    .set(1.0f,0.0f,0.0f,1.0f);
+        _colorMap["CYAN"]   .set(0.0f,1.0f,1.0f,1.0f);
+        _colorMap["YELLOW"] .set(1.0f,1.0f,0.0f,1.0f);
+        _colorMap["GREEN"]  .set(0.0f,1.0f,0.0f,1.0f);
+    }
     
     virtual const char* className()
     {
@@ -42,10 +52,12 @@ public:
 
     osg::Vec4 mapStringToColor(const std::string& str)
     {
-        if (str=="BLACK") return osg::Vec4(0.0f,0.0f,0.0f,1.0f);
-        else return osg::Vec4(1.0f,1.0f,1.0f,1.0f);
+        return _colorMap[str];
     }
     
+    
+    std::map<std::string,osg::Vec4> _colorMap;
+
 };
 
 // Register with Registry to instantiate the above reader/writer.

src/osgProducer/OsgCameraGroup.cpp

@@ -322,9 +322,16 @@ bool OsgCameraGroup::realize()
     if (_ds->getDepthBuffer())      clear_mask |= GL_DEPTH_BUFFER_BIT;
     if (_ds->getStencilBuffer())    clear_mask |= GL_STENCIL_BUFFER_BIT;
 
-    for( unsigned int i = 0; i < _cfg->getNumberOfCameras(); i++ )
+    // make sure any camera's which share the same render surface also share the same osg::State.
+    // use a std::map to keep track of what render surfaces are associated with what state.
+    typedef std::map<Producer::RenderSurface*,osg::State*> RenderSurfaceStateMap;
+    RenderSurfaceStateMap _renderSurfaceStateMap;
+    unsigned int contextID = 0;
+
+    for(unsigned int i = 0; i < _cfg->getNumberOfCameras(); i++ )
     {
         Producer::Camera *cam = _cfg->getCamera(i);
+        Producer::RenderSurface* rs = cam->getRenderSurface();
         
         // create the scene handler.
         osgProducer::OsgSceneHandler *sh = new osgProducer::OsgSceneHandler(_ds.get());
@@ -332,7 +339,15 @@ bool OsgCameraGroup::realize()
         osgUtil::SceneView* sv = sh->getSceneView();
         sv->setDefaults();
         
-        sh->setContextID(i);
+        if (_renderSurfaceStateMap.count(rs)==0)
+        {
+            _renderSurfaceStateMap[rs] = sv->getState();
+            sv->getState()->setContextID(contextID++);
+        }
+        else
+        {
+            sv->setState(_renderSurfaceStateMap[rs]);
+        }
 
         _shvec.push_back( sh );
         cam->setSceneHandler( sh );
@@ -342,7 +357,6 @@ bool OsgCameraGroup::realize()
         if (stage) stage->setClearMask(clear_mask);
 
         // set the realize callback.
-        Producer::RenderSurface* rs = cam->getRenderSurface();
         rs->setRealizeCallback( new RenderSurfaceRealizeCallback(this, sh));
         
         // set up the visual chooser.
@@ -374,6 +388,7 @@ bool OsgCameraGroup::realize()
         }        
     }
 
+    
     if( _global_stateset == NULL && _shvec.size() > 0 )
     {
         SceneHandlerList::iterator p = _shvec.begin();