Added GraphicsContextImplementation

2005-07-21 19:37:44 +00:00
parent 302c58fc93
commit 9b34bc5c86
3 changed files with 210 additions and 0 deletions
--- a/src/osgProducer/GraphicsContextImplementation.cpp
+++ b/src/osgProducer/GraphicsContextImplementation.cpp
@@ -0,0 +1,129 @@
+/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2005 Robert Osfield 
+ *
+ * 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 <osgProducer/GraphicsContextImplementation>
+#include <osg/Notify>
+
+using namespace osgProducer;
+
+namespace osgProducer
+{
+    struct MyCreateGraphicContexCallback : public osg::GraphicsContext::CreateGraphicContexCallback
+    {
+        virtual osg::GraphicsContext* createGraphicsContext(osg::GraphicsContext::Traits* traits)
+        {
+            return new GraphicsContextImplementation(traits);
+        }
+    };
+
+    struct RegisterCreateGraphicsContextCallbackProxy
+    {
+        RegisterCreateGraphicsContextCallbackProxy()
+        {
+            osg::GraphicsContext::setCreateGraphicsContextCallback(new MyCreateGraphicContexCallback);
+        }
+    };
+    
+    RegisterCreateGraphicsContextCallbackProxy createGraphicsContextCallbackProxy;
+};
+    
+
+
+GraphicsContextImplementation::GraphicsContextImplementation(Traits* traits)
+{
+    _rs = new Producer::RenderSurface;
+    _rs->setWindowName(traits->_windowName);
+    _rs->setWindowRectangle(traits->_x, traits->_y, traits->_width, traits->_height);
+    _rs->useBorder(traits->_windowDecoration);
+ 
+    if (traits->_pbuffer)
+    {
+        _rs->setDrawableType( Producer::RenderSurface::DrawableType_PBuffer );
+        
+        if (_trais->_alpha>0)
+        {
+            _rs->setRenderToTextureMode(Producer::RenderSurface::RenderToRGBATexture);
+        }
+        else
+        {
+            _rs->setRenderToTextureMode(Producer::RenderSurface::RenderToRGBTexture);
+        }
+    }
+    
+    setState(new osg::State);
+    getState()->setContextID(1);
+    
+    _rs->realize();
+
+   _traits = traits;
+}
+
+GraphicsContextImplementation::GraphicsContextImplementation(Producer::RenderSurface* rs)
+{
+    _rs = rs;
+}
+
+GraphicsContextImplementation::~GraphicsContextImplementation()
+{
+    release();
+}
+
+void GraphicsContextImplementation::makeCurrent()
+{
+    if (!_rs) return;
+
+    _rs->setReadDrawable( 0 );
+
+    _rs->makeCurrent();
+}
+
+void GraphicsContextImplementation::makeContextCurrent(GraphicsContext* readContext)
+{
+    if (!_rs) return;
+
+    GraphicsContextImplementation* readContextImplemention = dynamic_cast<GraphicsContextImplementation*>(readContext);
+
+    if (readContextImplemention)
+    {
+        _rs->setReadDrawable( readContextImplemention->getRenderSurface() );
+    }
+
+    _rs->makeCurrent();
+}
+
+void GraphicsContextImplementation::release()
+{
+    if (!_rs) return;
+    
+    // need to close render surface... 
+}
+
+void GraphicsContextImplementation::bindPBufferToTexture(GLenum buffer)
+{
+    if (!_rs) return;
+ 
+    Producer::RenderSurface::BufferType bufferType = Producer::RenderSurface::FrontBuffer;
+    switch(buffer)
+    {
+        case(GL_BACK): bufferType = Producer::RenderSurface::BackBuffer; break;
+        case(GL_FRONT): bufferType = Producer::RenderSurface::FrontBuffer; break;
+        default: bufferType = Producer::RenderSurface::FrontBuffer; break;
+    }
+
+    _rs->bindPBufferToTexture(bufferType);
+}
+
+void GraphicsContextImplementation::swapBuffers()
+{
+    _rs->swapBuffers();
+}