// Ceres Solver - A fast non-linear least squares minimizer
// Copyright 2013 Google Inc. All rights reserved.
// http://code.google.com/p/ceres-solver/
//
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// modification, are permitted provided that the following conditions are met:
//
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//   this list of conditions and the following disclaimer.
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// Author: sameeragarwal@google.com (Sameer Agarwal)

#include "ceres/covariance.h"

#include <utility>
#include <vector>
#include "ceres/covariance_impl.h"
#include "ceres/problem.h"
#include "ceres/problem_impl.h"

namespace ceres {

using std::pair;
using std::vector;

Covariance::Covariance(const Covariance::Options& options) {
  impl_.reset(new internal::CovarianceImpl(options));
}

Covariance::~Covariance() {
}

bool Covariance::Compute(
    const vector<pair<const double*, const double*> >& covariance_blocks,
    Problem* problem) {
  return impl_->Compute(covariance_blocks, problem->problem_impl_.get());
}

bool Covariance::GetCovarianceBlock(const double* parameter_block1,
                                    const double* parameter_block2,
                                    double* covariance_block) const {
  return impl_->GetCovarianceBlockInTangentOrAmbientSpace(parameter_block1,
                                                          parameter_block2,
                                                          true,  // ambient
                                                          covariance_block);
}

bool Covariance::GetCovarianceBlockInTangentSpace(
    const double* parameter_block1,
    const double* parameter_block2,
    double* covariance_block) const {
  return impl_->GetCovarianceBlockInTangentOrAmbientSpace(parameter_block1,
                                                          parameter_block2,
                                                          false,  // tangent
                                                          covariance_block);
}

}  // namespace ceres