osg::Node*
postRender( osgViewer::Viewer& viewer )
{
osg::Camera* rootCamera( viewer.getCamera() );
// Create the texture; we'll use this as our color buffer.
// Note it has no image data; not required.
osg::Texture2D* tex = new osg::Texture2D;
tex->setTextureSize( winW, winH );
tex->dirtyTextureObject();
tex->setInternalFormat( GL_RGBA );
tex->setBorderWidth( 0 );
tex->setFilter( osg::Texture::MIN_FILTER, osg::Texture::NEAREST );
tex->setFilter( osg::Texture::MAG_FILTER, osg::Texture::NEAREST );
// Attach the texture to the camera. Tell it to use multisampling.
// Internally, OSG allocates a multisampled renderbuffer, renders to it,
// and at the end of the frame performs a BlitFramebuffer into our texture.
rootCamera->attach( osg::Camera::COLOR_BUFFER0, tex, 0, 0, false );
rootCamera->setRenderTargetImplementation( osg::Camera::FRAME_BUFFER_OBJECT, osg::Camera::FRAME_BUFFER );
#if( OSGWORKS_OSG_VERSION >= 20906 )
rootCamera->setImplicitBufferAttachmentMask(
osg::Camera::IMPLICIT_COLOR_BUFFER_ATTACHMENT|osg::Camera::IMPLICIT_DEPTH_BUFFER_ATTACHMENT,
osg::Camera::IMPLICIT_COLOR_BUFFER_ATTACHMENT );
#endif
// Configure postRenderCamera to draw fullscreen textured quad
osg::ref_ptr< osg::Camera > postRenderCamera( new osg::Camera );
postRenderCamera->setClearColor( osg::Vec4( 0., 1., 0., 1. ) ); // should never see this.
postRenderCamera->setRenderTargetImplementation( osg::Camera::FRAME_BUFFER, osg::Camera::FRAME_BUFFER );
postRenderCamera->setReferenceFrame( osg::Camera::ABSOLUTE_RF );
postRenderCamera->setRenderOrder( osg::Camera::POST_RENDER );
postRenderCamera->setViewMatrix( osg::Matrixd::identity() );
postRenderCamera->setProjectionMatrix( osg::Matrixd::identity() );
osg::Geode* geode( new osg::Geode );
geode->addDrawable( osgwTools::makePlane(
osg::Vec3( -1,-1,0 ), osg::Vec3( 2,0,0 ), osg::Vec3( 0,2,0 ) ) );
geode->getOrCreateStateSet()->setTextureAttributeAndModes(
0, tex, osg::StateAttribute::ON );
geode->getOrCreateStateSet()->setAttribute(
myCreateEffectProgram( "none" ) );
geode->getOrCreateStateSet()->addUniform( new osg::Uniform(
"inputTextures[0]", 0 ) );
postRenderCamera->addChild( geode );
return( postRenderCamera.release() );
}
osg::Node*
postRender( osgViewer::Viewer& viewer )
{
osg::Camera* rootCamera( viewer.getCamera() );
// MRT: Attach two color buffers to the root camera, one for
// the standard color image, and another for the glow color.
osg::Texture2D* tex0 = new osg::Texture2D;
tex0->setTextureWidth( winW );
tex0->setTextureHeight( winH );
tex0->setInternalFormat( GL_RGBA );
tex0->setBorderWidth( 0 );
tex0->setFilter( osg::Texture::MIN_FILTER, osg::Texture::NEAREST );
tex0->setFilter( osg::Texture::MAG_FILTER, osg::Texture::NEAREST );
// Full color: attachment 0
rootCamera->attach( osg::Camera::COLOR_BUFFER0, tex0, 0, 0, false, 8, 8 );
osg::Texture2D* tex1 = new osg::Texture2D;
tex1->setTextureWidth( winW );
tex1->setTextureHeight( winH );
tex1->setInternalFormat( GL_RGBA );
tex1->setBorderWidth( 0 );
tex1->setFilter( osg::Texture::MIN_FILTER, osg::Texture::NEAREST );
tex1->setFilter( osg::Texture::MAG_FILTER, osg::Texture::NEAREST );
// Glow color: attachment 1
rootCamera->attach( osg::Camera::COLOR_BUFFER1, tex1, 0, 0, false, 8, 8 );
rootCamera->setRenderTargetImplementation( osg::Camera::FRAME_BUFFER_OBJECT, osg::Camera::FRAME_BUFFER );
#if( OSGWORKS_OSG_VERSION >= 20906 )
rootCamera->setImplicitBufferAttachmentMask(
osg::Camera::IMPLICIT_COLOR_BUFFER_ATTACHMENT|osg::Camera::IMPLICIT_DEPTH_BUFFER_ATTACHMENT,
osg::Camera::IMPLICIT_COLOR_BUFFER_ATTACHMENT );
#endif
// Post-draw callback on root camera handles resolving
// multisampling for the MRT case.
MSMRTCallback* msmrt = new MSMRTCallback( rootCamera );
rootCamera->setPostDrawCallback( msmrt );
// Configure postRenderCamera to draw fullscreen textured tri pair.
// This will combine the two (resolved) textures into a single image.
osg::ref_ptr< osg::Camera > postRenderCamera( new osg::Camera );
postRenderCamera->setClearColor( osg::Vec4( 0., 1., 0., 1. ) ); // should never see this.
postRenderCamera->setRenderTargetImplementation( osg::Camera::FRAME_BUFFER, osg::Camera::FRAME_BUFFER );
postRenderCamera->setReferenceFrame( osg::Camera::ABSOLUTE_RF );
postRenderCamera->setRenderOrder( osg::Camera::POST_RENDER );
postRenderCamera->setViewMatrix( osg::Matrixd::identity() );
postRenderCamera->setProjectionMatrix( osg::Matrixd::identity() );
osg::Geode* geode( new osg::Geode );
geode->setCullingActive( false );
geode->addDrawable( osg::createTexturedQuadGeometry(
osg::Vec3( -1,-1,0 ), osg::Vec3( 2,0,0 ), osg::Vec3( 0,2,0 ) ) );
mrtStateSetTriPair( geode->getOrCreateStateSet(), tex0, tex1 );
postRenderCamera->addChild( geode );
return( postRenderCamera.release() );
}
