From Romano Jose Magacho da Silva, added osg:FragmentProgram.
From Robert, add .osg support for FragmentProgram.
This commit is contained in:
Robert Osfield
298
src/osg/FragmentProgram.cpp
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298
src/osg/FragmentProgram.cpp
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/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2003 Robert Osfield
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*
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* This library is open source and may be redistributed and/or modified under
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
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* (at your option) any later version. The full license is in LICENSE file
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* included with this distribution, and on the openscenegraph.org website.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* OpenSceneGraph Public License for more details.
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*/
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#include <osg/Notify>
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#include <osg/GLExtensions>
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#include <osg/FragmentProgram>
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#include <osg/State>
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#include <osg/Timer>
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#include <list>
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using namespace osg;
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// static cache of deleted fragment programs which can only
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// by completely deleted once the appropriate OpenGL context
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// is set.
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typedef std::list<GLuint> FragmentProgramObjectList;
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typedef std::map<unsigned int,FragmentProgramObjectList> DeletedFragmentProgramObjectCache;
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static DeletedFragmentProgramObjectCache s_deletedFragmentProgramObjectCache;
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void FragmentProgram::deleteFragmentProgramObject(unsigned int contextID,GLuint handle)
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{
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if (handle!=0)
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{
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// insert the handle into the cache for the appropriate context.
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s_deletedFragmentProgramObjectCache[contextID].push_back(handle);
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}
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}
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void FragmentProgram::flushDeletedFragmentProgramObjects(unsigned int contextID,double /*currentTime*/, double& availableTime)
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{
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// if no time available don't try to flush objects.
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if (availableTime<=0.0) return;
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const osg::Timer& timer = *osg::Timer::instance();
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osg::Timer_t start_tick = timer.tick();
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double elapsedTime = 0.0;
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DeletedFragmentProgramObjectCache::iterator citr = s_deletedFragmentProgramObjectCache.find(contextID);
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if (citr!=s_deletedFragmentProgramObjectCache.end())
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{
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const Extensions* extensions = getExtensions(contextID,true);
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FragmentProgramObjectList& vpol = citr->second;
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for(FragmentProgramObjectList::iterator titr=vpol.begin();
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titr!=vpol.end() && elapsedTime<availableTime;
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)
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{
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extensions->glDeletePrograms( 1L, &(*titr ) );
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titr = vpol.erase(titr);
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elapsedTime = timer.delta_s(start_tick,timer.tick());
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}
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}
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availableTime -= elapsedTime;
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}
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FragmentProgram::FragmentProgram()
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{
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}
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FragmentProgram::FragmentProgram(const FragmentProgram& vp,const CopyOp& copyop):
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osg::StateAttribute(vp,copyop)
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{
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_fragmentProgram = vp._fragmentProgram;
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for( LocalParamList::const_iterator itr = vp._programLocalParameters.begin();
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itr != vp._programLocalParameters.end(); ++itr )
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{
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_programLocalParameters[itr->first] = itr->second;
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}
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for( MatrixList::const_iterator mitr = vp._matrixList.begin();
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mitr != vp._matrixList.end(); ++mitr )
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{
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_matrixList[mitr->first] = mitr->second;
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}
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}
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// virtual
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FragmentProgram::~FragmentProgram()
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{
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dirtyFragmentProgramObject();
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}
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void FragmentProgram::dirtyFragmentProgramObject()
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{
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for(unsigned int i=0;i<_fragmentProgramIDList.size();++i)
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{
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if (_fragmentProgramIDList[i] != 0)
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{
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FragmentProgram::deleteFragmentProgramObject(i,_fragmentProgramIDList[i]);
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_fragmentProgramIDList[i] = 0;
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}
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}
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}
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void FragmentProgram::apply(State& state) const
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{
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const unsigned int contextID = state.getContextID();
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const Extensions* extensions = getExtensions(contextID,true);
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if (!extensions->isFragmentProgramSupported())
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return;
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GLuint& fragmentProgramId=getFragmentProgramID(state.getContextID());
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// Fragment Program
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if (fragmentProgramId != 0)
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{
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extensions->glBindProgram( GL_FRAGMENT_PROGRAM_ARB, fragmentProgramId );
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}
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else if (!_fragmentProgram.empty())
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{
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glGetError(); // Reset Error flags.
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extensions->glGenPrograms( 1, &fragmentProgramId );
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extensions->glBindProgram( GL_FRAGMENT_PROGRAM_ARB, fragmentProgramId );
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extensions->glProgramString( GL_FRAGMENT_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB,
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_fragmentProgram.length(), _fragmentProgram.c_str());
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// Check for errors
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GLint errorposition;
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glGetIntegerv(GL_PROGRAM_ERROR_POSITION_ARB, &errorposition);
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if (errorposition != -1)
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{
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notify(osg::FATAL) << "FragmentProgram: " << glGetString(GL_PROGRAM_ERROR_STRING_ARB) << std::endl;
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std::string::size_type start = _fragmentProgram.rfind('\n', errorposition);
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std::string::size_type stop = _fragmentProgram.find('\n', errorposition);
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if (start!=std::string::npos && stop!=std::string::npos)
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{
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notify(osg::FATAL) << " : " << _fragmentProgram.substr(start+1, stop-start-2) << std::endl;
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std::string pointAtproblem(errorposition-(start+1), ' ');
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notify(osg::FATAL) << " : " << pointAtproblem << '^' << std::endl;
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}
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return;
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}
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}
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// Update local program parameters
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{
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for(LocalParamList::const_iterator itr=_programLocalParameters.begin();
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itr!=_programLocalParameters.end();
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++itr)
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{
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extensions->glProgramLocalParameter4fv(GL_FRAGMENT_PROGRAM_ARB, (*itr).first, (*itr).second.ptr());
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}
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}
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// Update matrix
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if (!_matrixList.empty())
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{
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for(MatrixList::const_iterator itr = _matrixList.begin();
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itr!=_matrixList.end();
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++itr)
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{
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glMatrixMode((*itr).first);
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glLoadMatrixf((*itr).second.ptr());
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}
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glMatrixMode(GL_MODELVIEW); // restore matrix mode
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}
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}
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typedef buffered_value< ref_ptr<FragmentProgram::Extensions> > BufferedExtensions;
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static BufferedExtensions s_extensions;
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FragmentProgram::Extensions* FragmentProgram::getExtensions(unsigned int contextID,bool createIfNotInitalized)
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{
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if (!s_extensions[contextID] && createIfNotInitalized) s_extensions[contextID] = new Extensions;
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return s_extensions[contextID].get();
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}
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void FragmentProgram::setExtensions(unsigned int contextID,Extensions* extensions)
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{
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s_extensions[contextID] = extensions;
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}
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FragmentProgram::Extensions::Extensions()
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{
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setupGLExtenions();
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}
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FragmentProgram::Extensions::Extensions(const Extensions& rhs):
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Referenced()
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{
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_isFragmentProgramSupported = rhs._isFragmentProgramSupported;
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_glBindProgram = rhs._glBindProgram;
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_glGenPrograms = rhs._glGenPrograms;
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_glDeletePrograms = rhs._glDeletePrograms;
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_glProgramString = rhs._glProgramString;
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_glProgramLocalParameter4fv = rhs._glProgramLocalParameter4fv;
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}
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void FragmentProgram::Extensions::lowestCommonDenominator(const Extensions& rhs)
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{
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if (!rhs._isFragmentProgramSupported) _isFragmentProgramSupported = false;
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if (!rhs._glBindProgram) _glBindProgram = 0;
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if (!rhs._glGenPrograms) _glGenPrograms = 0;
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if (!rhs._glDeletePrograms) _glDeletePrograms = 0;
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if (!rhs._glProgramString) _glProgramString = 0;
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if (!rhs._glProgramLocalParameter4fv) _glProgramLocalParameter4fv = 0;
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}
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void FragmentProgram::Extensions::setupGLExtenions()
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{
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_isFragmentProgramSupported = isGLExtensionSupported("GL_ARB_fragment_program");
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_glBindProgram = osg::getGLExtensionFuncPtr("glBindProgramARB");
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_glGenPrograms = osg::getGLExtensionFuncPtr("glGenProgramsARB");
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_glDeletePrograms = osg::getGLExtensionFuncPtr("glDeleteProgramsARB");
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_glProgramString = osg::getGLExtensionFuncPtr("glProgramStringARB");
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_glProgramLocalParameter4fv = osg::getGLExtensionFuncPtr("glProgramLocalParameter4fvARB");
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}
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void FragmentProgram::Extensions::glBindProgram(GLenum target, GLuint id) const
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{
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if (_glBindProgram)
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{
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typedef void (APIENTRY * BindProgramProc) (GLenum target, GLuint id);
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((BindProgramProc)_glBindProgram)(target,id);
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}
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else
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{
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notify(WARN)<<"Error: glBindProgram not supported by OpenGL driver"<<std::endl;
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}
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}
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void FragmentProgram::Extensions::glGenPrograms(GLsizei n, GLuint *programs) const
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{
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if (_glGenPrograms)
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{
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typedef void (APIENTRY * GenProgramsProc) (GLsizei n, GLuint *programs);
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((GenProgramsProc)_glGenPrograms)(n,programs);
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}
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else
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{
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notify(WARN)<<"Error: glGenPrograms not supported by OpenGL driver"<<std::endl;
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}
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}
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void FragmentProgram::Extensions::glDeletePrograms(GLsizei n, GLuint *programs) const
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{
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if (_glDeletePrograms)
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{
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typedef void (APIENTRY * DeleteProgramsProc) (GLsizei n, GLuint *programs);
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((DeleteProgramsProc)_glDeletePrograms)(n,programs);
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}
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else
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{
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notify(WARN)<<"Error: glDeletePrograms not supported by OpenGL driver"<<std::endl;
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}
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}
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void FragmentProgram::Extensions::glProgramString(GLenum target, GLenum format, GLsizei len, const void *string) const
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{
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if (_glProgramString)
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{
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typedef void (APIENTRY * ProgramStringProc) (GLenum target, GLenum format, GLsizei len, const void *string);
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((ProgramStringProc)_glProgramString)(target,format, len, string);
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}
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else
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{
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notify(WARN)<<"Error: glProgramString not supported by OpenGL driver"<<std::endl;
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}
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}
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void FragmentProgram::Extensions::glProgramLocalParameter4fv(GLenum target, GLuint index, const GLfloat *params) const
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{
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if (_glProgramLocalParameter4fv)
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{
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typedef void (APIENTRY * ProgramLocalParameter4fvProc) (GLenum target, GLuint index, const GLfloat *params);
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((ProgramLocalParameter4fvProc)_glProgramLocalParameter4fv)(target, index, params);
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}
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else
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{
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notify(WARN)<<"Error: glProgramLocalParameter4fv not supported by OpenGL driver"<<std::endl;
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}
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}
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