Robert Osfield wrote:
Hi Wojtek,
I've just applied your changes to RenderStage.cpp, but still wish to
test them before checking them in. Is there a good example that I can
use for testing?
Robert.
Hi Robert -- I've just tested current svn head with the attached
program. This is the code that instigated this entire long thread and
ultimate code submission from Wojtek.
This code was crashing on Max OS X if both color and depth were included
in the glBlitFramebuffer call. The code sets the implicit buffer
attachments in such a way as to leave depth out of the blit. With
current svn head, this code runs correctly and doesn't crash. You also
get really nice AA from the MSFBO.
Paul Martz
Skew Matrix Software LLC
_http://www.skew-matrix.com_ <http://www.skew-matrix.com/>
+1 303 859 9466
// Copyright (c) 2008 Skew Matrix Software LLC. All rights reserved.
#include <osg/Node>
#include <osg/Camera>
#include <osg/Geode>
#include <osg/Geometry>
#include <osg/Texture2D>
#include <osgDB/ReadFile>
#include <osgViewer/Viewer>
#include <string>
const int winW( 800 ), winH( 600 );
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->setTextureWidth( winW );
tex->setTextureHeight( winH );
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, 8, 8 );
rootCamera->setRenderTargetImplementation(
osg::Camera::FRAME_BUFFER_OBJECT, osg::Camera::FRAME_BUFFER );
// 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( osg::createTexturedQuadGeometry(
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()->setMode( GL_LIGHTING,
osg::StateAttribute::OFF );
postRenderCamera->addChild( geode );
return( postRenderCamera.release() );
}
int
main( int argc, char** argv )
{
osg::ref_ptr< osg::Group > root( new osg::Group );
root->addChild( osgDB::readNodeFile( "cow.osg" ) );
if( root->getNumChildren() == 0 )
return( 1 );
osgViewer::Viewer viewer;
viewer.setThreadingModel( osgViewer::ViewerBase::SingleThreaded );
viewer.setUpViewInWindow( 10, 30, winW, winH );
viewer.setSceneData( root.get() );
viewer.realize();
root->addChild( postRender( viewer ) );
// Clear to white to make AA extremely obvious.
viewer.getCamera()->setClearColor( osg::Vec4( 1., 1., 1., 1. ) );
return( viewer.run() );
}
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