void
VirtualProgram::accumulateShaders(const osg::State& state,
unsigned mask,
ShaderMap& accumShaderMap,
AttribBindingList& accumAttribBindings,
AttribAliasMap& accumAttribAliases)
{
const StateHack::AttributeVec* av = StateHack::GetAttributeVec(state, VirtualProgram::SA_TYPE);
if ( av && av->size() > 0 )
{
// find the deepest VP that doesn't inherit:
unsigned start = 0;
for( start = (int)av->size()-1; start > 0; --start )
{
const VirtualProgram* vp = dynamic_cast<const VirtualProgram*>( (*av)[start].first );
if ( vp && (vp->_mask & mask) && vp->_inherit == false )
break;
}
// collect shaders from there to here:
for( unsigned i=start; i<av->size(); ++i )
{
const VirtualProgram* vp = dynamic_cast<const VirtualProgram*>( (*av)[i].first );
if ( vp && (vp->_mask && mask) )
{
ShaderMap vpShaderMap;
vp->getShaderMap( vpShaderMap );
for( ShaderMap::const_iterator i = vpShaderMap.begin(); i != vpShaderMap.end(); ++i )
{
if ( i->second.accept(state) )
{
addToAccumulatedMap( accumShaderMap, i->first, i->second );
}
}
const AttribBindingList& abl = vp->getAttribBindingList();
accumAttribBindings.insert( abl.begin(), abl.end() );
#ifdef USE_ATTRIB_ALIASES
const AttribAliasMap& aliases = vp->getAttribAliases();
accumAttribAliases.insert( aliases.begin(), aliases.end() );
#endif
}
}
}
}
void
VirtualProgram::apply( osg::State& state ) const
{
if (_shaderMap.empty() && !_inheritSet)
{
// If there's no data in the VP, and never has been, unload any existing program.
// NOTE: OSG's State processor creates a "global default attribute" for each type.
// Sine we have no way of knowing whether the user created the VP or OSG created it
// as the default fallback, we use the "_inheritSet" flag to differeniate. This
// prevents any shader leakage from a VP-enabled node.
const unsigned int contextID = state.getContextID();
const osg::GL2Extensions* extensions = osg::GL2Extensions::Get(contextID,true);
if( ! extensions->isGlslSupported() ) return;
extensions->glUseProgram( 0 );
state.setLastAppliedProgramObject(0);
return;
}
// first, find and collect all the VirtualProgram attributes:
ShaderMap accumShaderMap;
AttribBindingList accumAttribBindings;
AttribAliasMap accumAttribAliases;
if ( _inherit )
{
const StateHack::AttributeVec* av = StateHack::GetAttributeVec( state, this );
if ( av && av->size() > 0 )
{
// find the deepest VP that doesn't inherit:
unsigned start = 0;
for( start = (int)av->size()-1; start > 0; --start )
{
const VirtualProgram* vp = dynamic_cast<const VirtualProgram*>( (*av)[start].first );
if ( vp && (vp->_mask & _mask) && vp->_inherit == false )
break;
}
// collect shaders from there to here:
for( unsigned i=start; i<av->size(); ++i )
{
const VirtualProgram* vp = dynamic_cast<const VirtualProgram*>( (*av)[i].first );
if ( vp && (vp->_mask && _mask) )
{
for( ShaderMap::const_iterator i = vp->_shaderMap.begin(); i != vp->_shaderMap.end(); ++i )
{
addToAccumulatedMap( accumShaderMap, i->first, i->second );
}
const AttribBindingList& abl = vp->getAttribBindingList();
accumAttribBindings.insert( abl.begin(), abl.end() );
const AttribAliasMap& aliases = vp->getAttribAliases();
accumAttribAliases.insert( aliases.begin(), aliases.end() );
}
}
}
}
// next add the local shader components to the map, respecting the override values:
for( ShaderMap::const_iterator i = _shaderMap.begin(); i != _shaderMap.end(); ++i )
{
addToAccumulatedMap( accumShaderMap, i->first, i->second );
}
const AttribBindingList& abl = this->getAttribBindingList();
accumAttribBindings.insert( abl.begin(), abl.end() );
const AttribAliasMap& aliases = this->getAttribAliases();
accumAttribAliases.insert( aliases.begin(), aliases.end() );
if ( true ) //even with nothing in the map, we still want mains! -gw //accumShaderMap.size() )
{
// next, assemble a list of the shaders in the map so we can use it as our
// program cache key.
// (Note: at present, the "cache key" does not include any information on the vertex
// attribute bindings. Technically it should, but in practice this might not be an
// issue; it is unlikely one would have two identical shader programs with different
// bindings.)
ShaderVector vec;
vec.reserve( accumShaderMap.size() );
for( ShaderMap::iterator i = accumShaderMap.begin(); i != accumShaderMap.end(); ++i )
{
ShaderEntry& entry = i->second;
vec.push_back( entry.first.get() );
}
// see if there's already a program associated with this list:
osg::Program* program = 0L;
// look up the program:
{
Threading::ScopedReadLock shared( _programCacheMutex );
ProgramMap::const_iterator p = _programCache.find( vec );
if ( p != _programCache.end() )
{
program = p->second.get();
}
}
// if not found, lock and build it:
if ( !program )
{
Threading::ScopedWriteLock exclusive( _programCacheMutex );
// look again in case of contention:
ProgramMap::const_iterator p = _programCache.find( vec );
if ( p != _programCache.end() )
{
program = p->second.get();
}
else
{
VirtualProgram* nc = const_cast<VirtualProgram*>(this);
program = nc->buildProgram( state, accumShaderMap, accumAttribBindings, accumAttribAliases);
}
}
// finally, apply the program attribute.
program->apply( state );
}
}
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::apply( osg::State& state ) const
{
if (_shaderMap.empty() && !_inheritSet)
{
// If there's no data in the VP, and never has been, unload any existing program.
// NOTE: OSG's State processor creates a "global default attribute" for each type.
// Sine we have no way of knowing whether the user created the VP or OSG created it
// as the default fallback, we use the "_inheritSet" flag to differeniate. This
// prevents any shader leakage from a VP-enabled node.
const unsigned int contextID = state.getContextID();
const osg::GL2Extensions* extensions = osg::GL2Extensions::Get(contextID,true);
if( ! extensions->isGlslSupported() ) return;
extensions->glUseProgram( 0 );
state.setLastAppliedProgramObject(0);
return;
}
// first, find and collect all the VirtualProgram attributes:
ShaderMap accumShaderMap;
AttribBindingList accumAttribBindings;
AttribAliasMap accumAttribAliases;
// Build the active shader map up to this point:
if ( _inherit )
{
accumulateShaders(state, _mask, accumShaderMap, accumAttribBindings, accumAttribAliases);
}
// next add the local shader components to the map, respecting the override values:
{
Threading::ScopedReadLock readonly(_dataModelMutex);
for( ShaderMap::const_iterator i = _shaderMap.begin(); i != _shaderMap.end(); ++i )
{
if ( i->second.accept(state) )
{
addToAccumulatedMap( accumShaderMap, i->first, i->second );
}
}
const AttribBindingList& abl = this->getAttribBindingList();
accumAttribBindings.insert( abl.begin(), abl.end() );
#ifdef USE_ATTRIB_ALIASES
const AttribAliasMap& aliases = this->getAttribAliases();
accumAttribAliases.insert( aliases.begin(), aliases.end() );
#endif
}
// next, assemble a list of the shaders in the map so we can use it as our
// program cache key.
// (Note: at present, the "cache key" does not include any information on the vertex
// attribute bindings. Technically it should, but in practice this might not be an
// issue; it is unlikely one would have two identical shader programs with different
// bindings.)
ShaderVector vec;
vec.reserve( accumShaderMap.size() );
for( ShaderMap::iterator i = accumShaderMap.begin(); i != accumShaderMap.end(); ++i )
{
ShaderEntry& entry = i->second;
if ( i->second.accept(state) )
{
vec.push_back( entry._shader.get() );
}
}
// see if there's already a program associated with this list:
osg::ref_ptr<osg::Program> program;
// look up the program:
{
Threading::ScopedReadLock shared( _programCacheMutex );
ProgramMap::const_iterator p = _programCache.find( vec );
if ( p != _programCache.end() )
{
program = p->second.get();
}
}
// if not found, lock and build it:
if ( !program.valid() )
{
// build a new set of accumulated functions, to support the creation of main()
ShaderComp::FunctionLocationMap accumFunctions;
accumulateFunctions( state, accumFunctions );
// now double-check the program cache, and failing that, build the
// new shader Program.
{
Threading::ScopedWriteLock exclusive( _programCacheMutex );
// double-check: look again ito negate race conditions
ProgramMap::const_iterator p = _programCache.find( vec );
if ( p != _programCache.end() )
{
program = p->second.get();
}
else
{
ShaderVector keyVector;
//OE_NOTICE << LC << "Building new Program for VP " << getName() << std::endl;
program = buildProgram(
getName(),
state,
accumFunctions,
accumShaderMap,
accumAttribBindings,
accumAttribAliases,
_template.get(),
keyVector);
// global sharing.
s_programRepo.share(program);
// finally, put own new program in the cache.
_programCache[ keyVector ] = program;
}
}
}
// finally, apply the program attribute.
if ( program.valid() )
{
const unsigned int contextID = state.getContextID();
const osg::GL2Extensions* extensions = osg::GL2Extensions::Get(contextID,true);
osg::Program::PerContextProgram* pcp = program->getPCP( contextID );
bool useProgram = state.getLastAppliedProgramObject() != pcp;
#ifdef DEBUG_APPLY_COUNTS
{
// debugging
static int s_framenum = 0;
static Threading::Mutex s_mutex;
static std::map< const VirtualProgram*, std::pair<int,int> > s_counts;
Threading::ScopedMutexLock lock(s_mutex);
int framenum = state.getFrameStamp()->getFrameNumber();
if ( framenum > s_framenum )
{
OE_NOTICE << LC << "Applies in last frame: " << std::endl;
for(std::map<const VirtualProgram*,std::pair<int,int> >::iterator i = s_counts.begin(); i != s_counts.end(); ++i)
{
std::pair<int,int>& counts = i->second;
OE_NOTICE << LC << " "
<< i->first->getName() << " : " << counts.second << "/" << counts.first << std::endl;
}
s_framenum = framenum;
s_counts.clear();
}
s_counts[this].first++;
if ( useProgram )
s_counts[this].second++;
}
#endif
if ( useProgram )
{
if( pcp->needsLink() )
program->compileGLObjects( state );
if( pcp->isLinked() )
{
if( osg::isNotifyEnabled(osg::INFO) )
pcp->validateProgram();
pcp->useProgram();
state.setLastAppliedProgramObject( pcp );
}
else
{
// program not usable, fallback to fixed function.
extensions->glUseProgram( 0 );
state.setLastAppliedProgramObject(0);
OE_WARN << LC << "Program link failure!" << std::endl;
}
}
//program->apply( state );
#if 0 // test code for detecting race conditions
for(int i=0; i<10000; ++i) {
state.setLastAppliedProgramObject(0L);
program->apply( state );
}
#endif
}
}
void
VirtualProgram::apply( osg::State& state ) const
{
if (_shaderMap.empty() && !_inheritSet)
{
// If there's no data in the VP, and never has been, unload any existing program.
// NOTE: OSG's State processor creates a "global default attribute" for each type.
// Sine we have no way of knowing whether the user created the VP or OSG created it
// as the default fallback, we use the "_inheritSet" flag to differeniate. This
// prevents any shader leakage from a VP-enabled node.
const unsigned int contextID = state.getContextID();
const osg::GL2Extensions* extensions = osg::GL2Extensions::Get(contextID,true);
if( ! extensions->isGlslSupported() ) return;
extensions->glUseProgram( 0 );
state.setLastAppliedProgramObject(0);
return;
}
// first, find and collect all the VirtualProgram attributes:
ShaderMap accumShaderMap;
AttribBindingList accumAttribBindings;
AttribAliasMap accumAttribAliases;
if ( _inherit )
{
const StateHack::AttributeVec* av = StateHack::GetAttributeVec( state, this );
if ( av && av->size() > 0 )
{
// find the deepest VP that doesn't inherit:
unsigned start = 0;
for( start = (int)av->size()-1; start > 0; --start )
{
const VirtualProgram* vp = dynamic_cast<const VirtualProgram*>( (*av)[start].first );
if ( vp && (vp->_mask & _mask) && vp->_inherit == false )
break;
}
// collect shaders from there to here:
for( unsigned i=start; i<av->size(); ++i )
{
const VirtualProgram* vp = dynamic_cast<const VirtualProgram*>( (*av)[i].first );
if ( vp && (vp->_mask && _mask) )
{
ShaderMap vpShaderMap;
vp->getShaderMap( vpShaderMap );
for( ShaderMap::const_iterator i = vpShaderMap.begin(); i != vpShaderMap.end(); ++i )
{
addToAccumulatedMap( accumShaderMap, i->first, i->second );
}
const AttribBindingList& abl = vp->getAttribBindingList();
accumAttribBindings.insert( abl.begin(), abl.end() );
#ifdef USE_ATTRIB_ALIASES
const AttribAliasMap& aliases = vp->getAttribAliases();
accumAttribAliases.insert( aliases.begin(), aliases.end() );
#endif
}
}
}
}
// next add the local shader components to the map, respecting the override values:
{
Threading::ScopedReadLock readonly(_dataModelMutex);
for( ShaderMap::const_iterator i = _shaderMap.begin(); i != _shaderMap.end(); ++i )
{
addToAccumulatedMap( accumShaderMap, i->first, i->second );
}
const AttribBindingList& abl = this->getAttribBindingList();
accumAttribBindings.insert( abl.begin(), abl.end() );
#ifdef USE_ATTRIB_ALIASES
const AttribAliasMap& aliases = this->getAttribAliases();
accumAttribAliases.insert( aliases.begin(), aliases.end() );
#endif
}
if ( true ) //even with nothing in the map, we still want mains! -gw //accumShaderMap.size() )
{
// next, assemble a list of the shaders in the map so we can use it as our
// program cache key.
// (Note: at present, the "cache key" does not include any information on the vertex
// attribute bindings. Technically it should, but in practice this might not be an
// issue; it is unlikely one would have two identical shader programs with different
// bindings.)
ShaderVector vec;
vec.reserve( accumShaderMap.size() );
for( ShaderMap::iterator i = accumShaderMap.begin(); i != accumShaderMap.end(); ++i )
{
ShaderEntry& entry = i->second;
vec.push_back( entry.first.get() );
}
// see if there's already a program associated with this list:
osg::ref_ptr<osg::Program> program;
// look up the program:
{
Threading::ScopedReadLock shared( _programCacheMutex );
ProgramMap::const_iterator p = _programCache.find( vec );
if ( p != _programCache.end() )
{
program = p->second.get();
}
}
// if not found, lock and build it:
if ( !program.valid() )
{
// build a new set of accumulated functions, to support the creation of main()
ShaderComp::FunctionLocationMap accumFunctions;
accumulateFunctions( state, accumFunctions );
// now double-check the program cache, and failing that, build the
// new shader Program.
{
Threading::ScopedWriteLock exclusive( _programCacheMutex );
// double-check: look again ito negate race conditions
ProgramMap::const_iterator p = _programCache.find( vec );
if ( p != _programCache.end() )
{
program = p->second.get();
}
else
{
ShaderVector keyVector;
//OE_NOTICE << LC << "Building new Program for VP " << getName() << std::endl;
program = buildProgram(
getName(),
state,
accumFunctions,
accumShaderMap,
accumAttribBindings,
accumAttribAliases,
_template.get(),
keyVector);
// finally, put own new program in the cache.
_programCache[ keyVector ] = program;
}
}
}
// finally, apply the program attribute.
if ( program.valid() )
{
program->apply( state );
#if 0 // test code for detecting race conditions
for(int i=0; i<10000; ++i) {
state.setLastAppliedProgramObject(0L);
program->apply( state );
}
#endif
}
}
}
