Initial Commit

2025-07-06 20:43:53 +03:00 · 2025-07-06 20:43:53 +03:00 · 6088fc29ed
commit 6088fc29ed
978 changed files with 353647 additions and 0 deletions
--- a/include/Eigen/src/misc/Image.h
+++ b/include/Eigen/src/misc/Image.h
@ -0,0 +1,80 @@
+// This file is part of Eigen, a lightweight C++ template library
+// for linear algebra.
+//
+// Copyright (C) 2009 Benoit Jacob <jacob.benoit.1@gmail.com>
+//
+// This Source Code Form is subject to the terms of the Mozilla
+// Public License v. 2.0. If a copy of the MPL was not distributed
+// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+#ifndef EIGEN_MISC_IMAGE_H
+#define EIGEN_MISC_IMAGE_H
+
+// IWYU pragma: private
+#include "./InternalHeaderCheck.h"
+
+namespace Eigen {
+
+namespace internal {
+
+/** \class image_retval_base
+ *
+ */
+template <typename DecompositionType>
+struct traits<image_retval_base<DecompositionType> > {
+  typedef typename DecompositionType::MatrixType MatrixType;
+  typedef Matrix<typename MatrixType::Scalar,
+                 MatrixType::RowsAtCompileTime,  // the image is a subspace of the destination space, whose
+                                                 // dimension is the number of rows of the original matrix
+                 Dynamic,                        // we don't know at compile time the dimension of the image (the rank)
+                 traits<MatrixType>::Options,
+                 MatrixType::MaxRowsAtCompileTime,  // the image matrix will consist of columns from the original
+                                                    // matrix,
+                 MatrixType::MaxColsAtCompileTime   // so it has the same number of rows and at most as many columns.
+                 >
+      ReturnType;
+};
+
+template <typename DecompositionType_>
+struct image_retval_base : public ReturnByValue<image_retval_base<DecompositionType_> > {
+  typedef DecompositionType_ DecompositionType;
+  typedef typename DecompositionType::MatrixType MatrixType;
+  typedef ReturnByValue<image_retval_base> Base;
+
+  image_retval_base(const DecompositionType& dec, const MatrixType& originalMatrix)
+      : m_dec(dec), m_rank(dec.rank()), m_cols(m_rank == 0 ? 1 : m_rank), m_originalMatrix(originalMatrix) {}
+
+  inline Index rows() const { return m_dec.rows(); }
+  inline Index cols() const { return m_cols; }
+  inline Index rank() const { return m_rank; }
+  inline const DecompositionType& dec() const { return m_dec; }
+  inline const MatrixType& originalMatrix() const { return m_originalMatrix; }
+
+  template <typename Dest>
+  inline void evalTo(Dest& dst) const {
+    static_cast<const image_retval<DecompositionType>*>(this)->evalTo(dst);
+  }
+
+ protected:
+  const DecompositionType& m_dec;
+  Index m_rank, m_cols;
+  const MatrixType& m_originalMatrix;
+};
+
+}  // end namespace internal
+
+#define EIGEN_MAKE_IMAGE_HELPERS(DecompositionType)                   \
+  typedef typename DecompositionType::MatrixType MatrixType;          \
+  typedef typename MatrixType::Scalar Scalar;                         \
+  typedef typename MatrixType::RealScalar RealScalar;                 \
+  typedef Eigen::internal::image_retval_base<DecompositionType> Base; \
+  using Base::dec;                                                    \
+  using Base::originalMatrix;                                         \
+  using Base::rank;                                                   \
+  using Base::rows;                                                   \
+  using Base::cols;                                                   \
+  image_retval(const DecompositionType& dec, const MatrixType& originalMatrix) : Base(dec, originalMatrix) {}
+
+}  // end namespace Eigen
+
+#endif  // EIGEN_MISC_IMAGE_H