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From Holger Helmich, Tessellation shader support

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This commit is contained in:
Robert Osfield
2010-11-23 14:50:31 +00:00
parent 5b3691e602
commit d7747685b3
9 changed files with 181 additions and 8 deletions
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56
src/osg/Program.cpp
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@@ -2,6 +2,7 @@
* Copyright (C) 2003-2005 3Dlabs Inc. Ltd.
* Copyright (C) 2004-2005 Nathan Cournia
* Copyright (C) 2008 Zebra Imaging
* Copyright (C) 2010 VIRES Simulationstechnologie GmbH
*
* This application is open source and may be redistributed and/or modified
* freely and without restriction, both in commercial and non commercial
@@ -15,6 +16,7 @@
/* file: src/osg/Program.cpp
* author: Mike Weiblen 2008-01-19
* Holger Helmich 2010-10-21
*/
#include <list>
@@ -97,7 +99,8 @@ void Program::discardDeletedGlPrograms(unsigned int contextID)
Program::Program() :
_geometryVerticesOut(1), _geometryInputType(GL_TRIANGLES),
_geometryOutputType(GL_TRIANGLE_STRIP)
_geometryOutputType(GL_TRIANGLE_STRIP),
_patchVertices(3)
{
}
@@ -125,6 +128,8 @@ Program::Program(const Program& rhs, const osg::CopyOp& copyop):
_geometryVerticesOut = rhs._geometryVerticesOut;
_geometryInputType = rhs._geometryInputType;
_geometryOutputType = rhs._geometryOutputType;
_patchVertices = rhs._patchVertices;
}
@@ -159,6 +164,9 @@ int Program::compare(const osg::StateAttribute& sa) const
if( _geometryOutputType < rhs._geometryOutputType ) return -1;
if( rhs._geometryOutputType < _geometryOutputType ) return 1;
if( _patchVertices < rhs._patchVertices ) return -1;
if( rhs._patchVertices < _patchVertices ) return 1;
ShaderList::const_iterator litr=_shaderList.begin();
ShaderList::const_iterator ritr=rhs._shaderList.begin();
for(;
@@ -299,7 +307,11 @@ void Program::setParameter( GLenum pname, GLint value )
break;
case GL_GEOMETRY_OUTPUT_TYPE_EXT:
_geometryOutputType = value;
dirtyProgram(); // needed?
//dirtyProgram(); // needed?
break;
case GL_PATCH_VERTICES:
_patchVertices = value;
dirtyProgram();
break;
default:
OSG_WARN << "setParameter invalid param " << pname << std::endl;
@@ -307,6 +319,35 @@ void Program::setParameter( GLenum pname, GLint value )
}
}
void Program::setParameterfv( GLenum pname, const GLfloat* value )
{
switch( pname )
{
// todo tessellation default level
case GL_PATCH_DEFAULT_INNER_LEVEL:
break;
case GL_PATCH_DEFAULT_OUTER_LEVEL:
break;
default:
OSG_WARN << "setParameter invalid param " << pname << std::endl;
break;
}
}
const GLfloat* Program::getParameterfv( GLenum pname ) const
{
switch( pname )
{
;
// todo tessellation default level
// case GL_PATCH_DEFAULT_INNER_LEVEL: return _patchDefaultInnerLevel;
// case GL_PATCH_DEFAULT_OUTER_LEVEL: return _patchDefaultOuterLevel;
}
OSG_WARN << "getParameter invalid param " << pname << std::endl;
return 0;
}
GLint Program::getParameter( GLenum pname ) const
{
switch( pname )
@@ -314,6 +355,7 @@ GLint Program::getParameter( GLenum pname ) const
case GL_GEOMETRY_VERTICES_OUT_EXT: return _geometryVerticesOut;
case GL_GEOMETRY_INPUT_TYPE_EXT: return _geometryInputType;
case GL_GEOMETRY_OUTPUT_TYPE_EXT: return _geometryOutputType;
case GL_PATCH_VERTICES: return _patchVertices;
}
OSG_WARN << "getParameter invalid param " << pname << std::endl;
return 0;
@@ -464,14 +506,20 @@ void Program::PerContextProgram::linkProgram(osg::State& state)
_extensions->glProgramParameteri( _glProgramHandle, GL_GEOMETRY_INPUT_TYPE_EXT, _program->_geometryInputType );
_extensions->glProgramParameteri( _glProgramHandle, GL_GEOMETRY_OUTPUT_TYPE_EXT, _program->_geometryOutputType );
}
if (_extensions->areTessellationShadersSupported() )
{
_extensions->glPatchParameteri( GL_PATCH_VERTICES, _program->_patchVertices );
// todo: add default tessellation level
}
// Detach removed shaders
for( unsigned int i=0; i < _shadersToDetach.size(); ++i )
{
_shadersToDetach[i]->detachShader( _contextID, _glProgramHandle );
}
_shadersToDetach.clear();
// Attach new shaders
for( unsigned int i=0; i < _shadersToAttach.size(); ++i )
{