bool FileFormatInstance::ReadDisplayFunction( DisplayFunction& df )
{
try
{
df = DisplayFunction();
if ( (*API->FileFormat->BeginDisplayFunctionExtraction)( handle ) == api_false )
return false;
DVector m, s, h, l, r;
df.GetDisplayFunctionParameters( m, s, h, l, r );
bool ok = (*API->FileFormat->GetImageDisplayFunction)( handle, m.Begin(), s.Begin(), h.Begin(), l.Begin(), r.Begin() ) != api_false;
if ( ok )
df = DisplayFunction( m, s, h, l, r );
(*API->FileFormat->EndDisplayFunctionExtraction)( handle );
return ok;
}
catch ( ... )
{
(*API->FileFormat->EndDisplayFunctionExtraction)( handle );
throw;
}
}
void FileFormatImplementation::EndDisplayFunctionEmbedding()
{
if ( !m_data->displayFunction.IsIdentityTransformation() )
WriteDisplayFunction( m_data->displayFunction );
m_data->displayFunction = DisplayFunction();
}
void FileFormatImplementation::BeginDisplayFunctionEmbedding()
{
BeginPrivate();
m_data->displayFunction = DisplayFunction();
}
void FileFormatImplementation::EndDisplayFunctionExtraction()
{
m_data->displayFunction = DisplayFunction();
}
DisplayFunction FileFormatImplementation::ReadDisplayFunction()
{
MANDATORY( "ReadDisplayFunction" );
return DisplayFunction();
}
