File indexing completed on 2024-06-16 04:11:13

 /*
  *  SPDX-FileCopyrightText: 2020 Sharaf Zaman <sharafzaz121@gmail.com>
  *
  *  SPDX-License-Identifier: GPL-2.0-or-later
  */
 #ifndef SVGMESHPATCH_H
 #define SVGMESHPATCH_H
 
 #include <array>
 
 #include <QColor>
 #include <QPointF>
 #include <QVector>
 #include <QMap>
 #include <QScopedPointer>
 #include <QPainterPath>
 
 #include <KoPathShape.h>
 
 struct SvgMeshStop {
     QColor color;
     QPointF point;
 
     SvgMeshStop()
     {}
 
     SvgMeshStop(QColor color, QPointF point)
         : color(color), point(point)
     {}
 
     bool isValid() const { return color.isValid(); }
 };
 
 using SvgMeshPath = std::array<QPointF, 4>;
 
 class KRITAFLAKE_EXPORT SvgMeshPatch
 {
 public:
     /// Position of stop in the patch
     enum Type {
         Top = 0,
         Right,
         Bottom,
         Left,
         Size,
     };
 
     SvgMeshPatch(QPointF startingPoint);
     SvgMeshPatch(const SvgMeshPatch& other);
 
     // NOTE: NO path is created here
     // sets a new starting point for the patch
     void moveTo(const QPointF& p);
     /// Helper to convert to a cubic curve internally.
     void lineTo(const QPointF& p);
     /// add points as curve.
     void curveTo(const QPointF& c1, const QPointF& c2, const QPointF& p);
 
     /// returns the starting point of the stop
     SvgMeshStop getStop(Type type) const;
 
     /// returns the midPoint in parametric space
     inline QPointF getMidpointParametric(Type type) const {
         return (m_parametricCoords[type] + m_parametricCoords[(type + 1) % Size]) * 0.5;
     }
 
     /// get the point on a segment using De Casteljau's algorithm
     QPointF segmentPointAt(Type type, qreal t) const;
 
     /// split a segment using De Casteljau's algorithm
     QPair<std::array<QPointF, 4>, std::array<QPointF, 4>> segmentSplitAt(Type type, qreal t) const;
 
     /// Get a segment of the path in the meshpatch
     std::array<QPointF, 4> getSegment(Type type) const;
 
     /// Get full (closed) meshpath
     QPainterPath getPath() const;
 
     /// Get size swept by mesh in pts
     QSizeF size() const;
 
     QRectF boundingRect() const;
 
     /// Gets the curve passing through the middle of meshpatch
     std::array<QPointF, 4> getMidCurve(bool isVertical) const;
 
     void subdivideHorizontally(QVector<SvgMeshPatch*>& subdivided,
                                const QVector<QColor>& colors) const;
 
     void subdivideVertically(QVector<SvgMeshPatch*>& subdivided,
                              const QVector<QColor>& colors) const;
 
     void subdivide(QVector<SvgMeshPatch*>& subdivided,
                    const QVector<QColor>& colors) const;
 
     bool isDivisibleVertically() const;
     bool isDivisibleHorizontally() const;
 
     int countPoints() const;
 
     /* Parses raw pathstr and adds path to the shape, if the path isn't
      * complete, it will have to be computed and given with pathIncomplete = true
      * (Ideal case for std::optional)
      */
     void addStop(const QString& pathStr, QColor color, Type edge, bool pathIncomplete = false, QPointF lastPoint = QPointF());
 
     /// Adds path to the shape
     void addStop(const std::array<QPointF, 4>& pathPoints, QColor color, Type edge);
 
     /// Adds linear path to the shape
     void addStopLinear(const std::array<QPointF, 2>& pathPoints, QColor color, Type edge);
 
     void modifyPath(SvgMeshPatch::Type type, std::array<QPointF, 4> newPath);
     void modifyCorner(SvgMeshPatch::Type type, const QPointF &delta);
 
     void setStopColor(SvgMeshPatch::Type type, const QColor &color);
 
     void setTransform(const QTransform& matrix);
 
 private:
     /* Parses path and adds it to m_path and returns the last point of the curve/line
      * see also: SvgMeshPatch::addStop
      */
     QPointF parseMeshPath(const QString& path, bool pathIncomplete = false, const QPointF lastPoint = QPointF());
     const char* getCoord(const char* ptr, qreal& number);
 
 private:
     bool m_newPath;
     int counter {0};
 
     /// This is the starting point for each path
     QPointF m_startingPoint;
 
     std::array<SvgMeshStop, Size> m_nodes;
     std::array<std::array<QPointF, 4>, 4> controlPoints;
     /// Coordinates in UV space
     std::array<QPointF, 4> m_parametricCoords;
 };
 
 #endif // SVGMESHPATCH_H