void
VirtualProgram::addShadersToProgram(const ShaderVector& shaders,
const AttribBindingList& attribBindings,
const AttribAliasMap& attribAliases,
osg::Program* program )
{
#ifdef USE_ATTRIB_ALIASES
// apply any vertex attribute aliases. But first, sort them from longest to shortest
// so we don't get any overlap and bad replacements.
AttribAliasVector sortedAliases;
sortedAliases.reserve( attribAliases.size() );
sortedAliases.insert(sortedAliases.begin(), attribAliases.begin(), attribAliases.end());
std::sort( sortedAliases.begin(), sortedAliases.end(), s_attribAliasSortFunc );
for( VirtualProgram::ShaderVector::const_iterator i = shaders.begin(); i != shaders.end(); ++i )
{
osg::Shader* shader = i->get();
applyAttributeAliases( shader, sortedAliases );
}
#endif
// merge the shaders if necessary.
if ( s_mergeShaders )
{
unsigned vertVersion = 0;
HeaderMap vertHeaders;
std::stringstream vertBody;
unsigned fragVersion = 0;
HeaderMap fragHeaders;
std::stringstream fragBody;
// parse the shaders, combining header lines and finding the highest version:
for( VirtualProgram::ShaderVector::const_iterator i = shaders.begin(); i != shaders.end(); ++i )
{
osg::Shader* s = i->get();
if ( s->getType() == osg::Shader::VERTEX )
{
parseShaderForMerging( s->getShaderSource(), vertVersion, vertHeaders, vertBody );
}
else if ( s->getType() == osg::Shader::FRAGMENT )
{
parseShaderForMerging( s->getShaderSource(), fragVersion, fragHeaders, fragBody );
}
}
// write out the merged shader code:
std::string vertBodyText;
vertBodyText = vertBody.str();
std::stringstream vertShaderBuf;
if ( vertVersion > 0 )
vertShaderBuf << "#version " << vertVersion << "\n";
for( HeaderMap::const_iterator h = vertHeaders.begin(); h != vertHeaders.end(); ++h )
vertShaderBuf << h->second << "\n";
vertShaderBuf << vertBodyText << "\n";
vertBodyText = vertShaderBuf.str();
std::string fragBodyText;
fragBodyText = fragBody.str();
std::stringstream fragShaderBuf;
if ( fragVersion > 0 )
fragShaderBuf << "#version " << fragVersion << "\n";
for( HeaderMap::const_iterator h = fragHeaders.begin(); h != fragHeaders.end(); ++h )
fragShaderBuf << h->second << "\n";
fragShaderBuf << fragBodyText << "\n";
fragBodyText = fragShaderBuf.str();
// add them to the program.
program->addShader( new osg::Shader(osg::Shader::VERTEX, vertBodyText) );
program->addShader( new osg::Shader(osg::Shader::FRAGMENT, fragBodyText) );
if ( s_dumpShaders )
{
OE_NOTICE << LC
<< "\nMERGED VERTEX SHADER: \n\n" << vertBodyText << "\n\n"
<< "MERGED FRAGMENT SHADER: \n\n" << fragBodyText << "\n" << std::endl;
}
}
else
{
for( VirtualProgram::ShaderVector::const_iterator i = shaders.begin(); i != shaders.end(); ++i )
{
program->addShader( i->get() );
if ( s_dumpShaders )
OE_NOTICE << LC << "SHADER " << i->get()->getName() << ":\n" << i->get()->getShaderSource() << "\n" << std::endl;
}
}
// add the attribute bindings
for( VirtualProgram::AttribBindingList::const_iterator abl = attribBindings.begin(); abl != attribBindings.end(); ++abl )
{
program->addBindAttribLocation( abl->first, abl->second );
}
}
void
VirtualProgram::addShadersToProgram(const ShaderVector& shaders,
const AttribBindingList& attribBindings,
osg::Program* program )
{
if ( s_mergeShaders )
{
unsigned vertVersion = 0;
HeaderMap vertHeaders;
std::stringstream vertBody;
unsigned fragVersion = 0;
HeaderMap fragHeaders;
std::stringstream fragBody;
// parse the shaders, combining header lines and finding the highest version:
for( VirtualProgram::ShaderVector::const_iterator i = shaders.begin(); i != shaders.end(); ++i )
{
osg::Shader* s = i->get();
if ( s->getType() == osg::Shader::VERTEX )
{
parseShaderForMerging( s->getShaderSource(), vertVersion, vertHeaders, vertBody );
}
else if ( s->getType() == osg::Shader::FRAGMENT )
{
parseShaderForMerging( s->getShaderSource(), fragVersion, fragHeaders, fragBody );
}
}
// write out the merged shader code:
std::string vertBodyText;
vertBodyText = vertBody.str();
std::stringstream vertShaderBuf;
if ( vertVersion > 0 )
vertShaderBuf << "#version " << vertVersion << "\n";
for( HeaderMap::const_iterator h = vertHeaders.begin(); h != vertHeaders.end(); ++h )
vertShaderBuf << h->second << "\n";
vertShaderBuf << vertBodyText << "\n";
vertBodyText = vertShaderBuf.str();
std::string fragBodyText;
fragBodyText = fragBody.str();
std::stringstream fragShaderBuf;
if ( fragVersion > 0 )
fragShaderBuf << "#version " << fragVersion << "\n";
for( HeaderMap::const_iterator h = fragHeaders.begin(); h != fragHeaders.end(); ++h )
fragShaderBuf << h->second << "\n";
fragShaderBuf << fragBodyText << "\n";
fragBodyText = fragShaderBuf.str();
// add them to the program.
program->addShader( new osg::Shader(osg::Shader::VERTEX, vertBodyText) );
program->addShader( new osg::Shader(osg::Shader::FRAGMENT, fragBodyText) );
if ( s_dumpShaders )
{
OE_NOTICE << LC
<< "\nMERGED VERTEX SHADER: \n\n" << vertBodyText << "\n\n"
<< "MERGED FRAGMENT SHADER: \n\n" << fragBodyText << "\n" << std::endl;
}
}
else
{
for( VirtualProgram::ShaderVector::const_iterator i = shaders.begin(); i != shaders.end(); ++i )
{
program->addShader( i->get() );
if ( s_dumpShaders )
OE_NOTICE << LC << "SHADER " << i->get()->getName() << ":\n" << i->get()->getShaderSource() << "\n" << std::endl;
}
}
// add the attribute bindings
for( VirtualProgram::AttribBindingList::const_iterator abl = attribBindings.begin(); abl != attribBindings.end(); ++abl )
{
program->addBindAttribLocation( abl->first, abl->second );
}
}
