File indexing completed on 2025-01-19 03:51:13

 /* ============================================================
  *
  * This file is a part of digiKam project
  * https://www.digikam.org
  *
  * Date        : 2005-02-17
  * Description : a matrix implementation for image
  *               perspective adjustment.
  *
  * SPDX-FileCopyrightText: 2005-2024 by Gilles Caulier <caulier dot gilles at gmail dot com>
  * SPDX-FileCopyrightText: 2006-2012 by Marcel Wiesweg <marcel dot wiesweg at gmx dot de>
  *
  * SPDX-License-Identifier: GPL-2.0-or-later
  *
  * ============================================================ */
 
 #ifndef DIGIKAM_EDITOR_PERSPECTIVE_MATRIX_H
 #define DIGIKAM_EDITOR_PERSPECTIVE_MATRIX_H
 
 namespace DigikamEditorPerspectiveToolPlugin
 {
 
 class PerspectiveMatrix
 {
 public:
 
     /**
      * PerspectiveMatrix:
      *
      * Initializes matrix to the identity matrix.
      */
     explicit PerspectiveMatrix();
 
     /**
      * translate:
      * @param x Translation in X direction.
      * @param y Translation in Y direction.
      *
      * Translates the matrix by x and y.
      */
     void translate(double x, double y);
 
     /**
      * scale:
      * @param x X scale factor.
      * @param y Y scale factor.
      *
      * Scales the matrix by x and y
      */
     void scale(double x, double y);
 
     /**
      * invert:
      *
      * Inverts this matrix.
      */
     void invert();
 
     /**
      * multiply:
      * @param matrix1 The other input matrix.
      *
      * Multiplies this matrix with another matrix
      */
     void multiply(const PerspectiveMatrix& matrix1);
 
     /**
      * transformPoint:
      * @param x The source X coordinate.
      * @param y The source Y coordinate.
      * @param newx The transformed X coordinate.
      * @param newy The transformed Y coordinate.
      *
      * Transforms a point in 2D as specified by the transformation matrix.
      */
     void transformPoint(double x, double y, double* newx, double* newy) const;
 
     /**
      * determinant:
      *
      * Calculates the determinant of this matrix.
      *
      * Returns: The determinant.
      */
     double determinant() const;
 
 public:
 
     /**
      * coeff:
      *
      * The 3x3 matrix data
      */
     double coeff[3][3];
 };
 
 } // namespace DigikamEditorPerspectiveToolPlugin
 
 #endif // DIGIKAM_EDITOR_PERSPECTIVE_MATRIX_H