ShaderTextureFilterBase::ShaderTextureFilterBase(void) :
    _sfInternalParameters     (SHLParameterChunkPtr(NullFC)), 
    _sfInternalShader         (SHLChunkPtr(NullFC)), 
    _sfInternalFBO            (FBOViewportPtr(NullFC)), 
    _sfFBOSize                (Vec2f(-1,-1)), 
    _sfShaderOutputSlot       (TextureFilterOutputSlot(OSG_TEXTURE_INTERNAL_FORMAT_COLOR,OSG_TEXTURE_DATA_TYPE_UINT,"")), 
    _sfShaderInputSlot        (TextureFilterInputSlot(OSG_TEXTURE_INTERNAL_FORMAT_COLOR | OSG_TEXTURE_INTERNAL_FORMAT_DEPTH | OSG_TEXTURE_INTERNAL_FORMAT_STENCIL,OSG_TEXTURE_DATA_TYPE_UINT | OSG_TEXTURE_DATA_TYPE_INT | OSG_TEXTURE_DATA_TYPE_FLOAT,"")), 
    Inherited() 
{
}
SHLParameterChunkBase::SHLParameterChunkBase(void) :
    _sfSHLChunk               (SHLChunkPtr(NullFC)), 
    Inherited() 
{
}