void HBAODrawCallback::operator()( osg::RenderInfo& renderInfo ) const
{
osg::State& state = *(renderInfo.getState());
if ( !_aoContext )
{
// Initialize AO
HBAODrawCallback* nonconst = const_cast<HBAODrawCallback*>( this );
if ( !nonconst->initializeContext(renderInfo) ) return;
}
// Handle scene elements
osg::Matrixf projMatrix = state.getProjectionMatrix();
osg::Matrixf viewMatrix = state.getModelViewMatrix();
if ( !_depthTexture || !_outputTexture ) return;
unsigned int contextID = renderInfo.getContextID();
GLuint fboID = _fbo->getHandle(contextID);
if ( _dirtyFBO )
{
_fbo->setAttachment( osg::Camera::COLOR_BUFFER,
osg::FrameBufferAttachment(_outputTexture.get()) );
_dirtyFBO = false;
}
if ( fboID==0 )
{
_fbo->apply( state );
fboID = _fbo->getHandle(contextID);
}
osg::Texture::TextureObject* depthObj = _depthTexture->getTextureObject(contextID);
osg::Texture::TextureObject* normalObj =
_normalTexture.valid() ? _normalTexture->getTextureObject(contextID) : NULL;
if ( fboID==0 || !depthObj ) return;
// Render AO
GFSDK_SSAO_Parameters_GL aoParams;
aoParams.Radius = 2.0f;
aoParams.Bias = 0.2f;
aoParams.DetailAO = 1.0f;
aoParams.CoarseAO = 1.0f;
aoParams.DepthStorage = GFSDK_SSAO_FP32_VIEW_DEPTHS;//GFSDK_SSAO_FP16_VIEW_DEPTHS;
aoParams.PowerExponent = 10.0f;
aoParams.Output.BlendMode = GFSDK_SSAO_OVERWRITE_RGB;
aoParams.Blur.Enable = true;
aoParams.Blur.Sharpness = 4.0f;
aoParams.Blur.Radius = GFSDK_SSAO_BLUR_RADIUS_2;//GFSDK_SSAO_BLUR_RADIUS_4;//GFSDK_SSAO_BLUR_RADIUS_8;
GFSDK_SSAO_InputData_GL input;
input.DepthData.DepthTextureType = GFSDK_SSAO_HARDWARE_DEPTHS;
input.DepthData.FullResDepthTexture = GFSDK_SSAO_Texture_GL(GL_TEXTURE_2D, depthObj->id());
input.DepthData.ProjectionMatrix.Data = GFSDK_SSAO_Float4x4(projMatrix.ptr());
input.DepthData.ProjectionMatrix.Layout = GFSDK_SSAO_ROW_MAJOR_ORDER;
input.DepthData.MetersToViewSpaceUnits = 1.0f;
if ( normalObj )
{
input.NormalData.Enable = true;
input.NormalData.FullResNormalTexture = GFSDK_SSAO_Texture_GL(GL_TEXTURE_2D, normalObj->id());
input.NormalData.WorldToViewMatrix.Data = GFSDK_SSAO_Float4x4(viewMatrix.ptr());
input.NormalData.WorldToViewMatrix.Layout = GFSDK_SSAO_ROW_MAJOR_ORDER;
input.NormalData.DecodeScale = 2.0f;
input.NormalData.DecodeBias = -1.0f;
}
GFSDK_SSAO_RenderMask renderMask = GFSDK_SSAO_RENDER_AO;//GFSDK_SSAO_RENDER_DEBUG_NORMAL;
glDisable( GL_DEPTH_TEST );
GFSDK_SSAO_Status status = _aoContext->RenderAO( &input, &aoParams, fboID, renderMask );
if ( status!=GFSDK_SSAO_OK )
{
OSG_WARN << "[HBAODrawCallback] Failed to render AO: " << status << std::endl;
}
}
