text: /****************************************************************************
  **
  ** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
  ** Contact: http://www.qt-project.org/legal
  **
  ** This file is part of the QtGui module of the Qt Toolkit.
  **
  ** $QT_BEGIN_LICENSE:LGPL21$
  ** Commercial License Usage
  ** Licensees holding valid commercial Qt licenses may use this file in
  ** accordance with the commercial license agreement provided with the
  ** Software or, alternatively, in accordance with the terms contained in
  ** a written agreement between you and Digia. For licensing terms and
  ** conditions see http://qt.digia.com/licensing. For further information
  ** use the contact form at http://qt.digia.com/contact-us.
  **
  ** GNU Lesser General Public License Usage
  ** Alternatively, this file may be used under the terms of the GNU Lesser
  ** General Public License version 2.1 or version 3 as published by the Free
  ** Software Foundation and appearing in the file LICENSE.LGPLv21 and
  ** LICENSE.LGPLv3 included in the packaging of this file. Please review the
  ** following information to ensure the GNU Lesser General Public License
  ** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
  ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
  **
  ** In addition, as a special exception, Digia gives you certain additional
  ** rights. These rights are described in the Digia Qt LGPL Exception
  ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
  **
  ** $QT_END_LICENSE$
  **
  ****************************************************************************/
  
  //
  //  W A R N I N G
  //  -------------
  //
  // This file is not part of the Qt API.  It exists purely as an
  // implementation detail.  This header file may change from version to
  // version without notice, or even be removed.
  //
  // We mean it.
  //
  
  #ifndef QOPENGL2PEXVERTEXARRAY_P_H
  #define QOPENGL2PEXVERTEXARRAY_P_H
  
  #include <QRectF>
  
  #include <private/qdatabuffer_p.h>
  #include <private/qvectorpath_p.h>
  #include <private/qopenglcontext_p.h>
  
  QT_BEGIN_NAMESPACE
  
  class QOpenGLPoint
  {
  public:
      QOpenGLPoint(GLfloat new_x, GLfloat new_y) :
          x(new_x), y(new_y) {};
  
      QOpenGLPoint(const QPointF &p) :
          x(p.x()), y(p.y()) {};
  
      QOpenGLPoint(const QPointF* p) :
          x(p->x()), y(p->y()) {};
  
      GLfloat x;
      GLfloat y;
  
      operator QPointF() {return QPointF(x,y);}
      operator QPointF() const {return QPointF(x,y);}
  };
  
  struct QOpenGLRect
  {
      QOpenGLRect(const QRectF &r)
          :  left(r.left()), top(r.top()), right(r.right()), bottom(r.bottom()) {}
  
      QOpenGLRect(GLfloat l, GLfloat t, GLfloat r, GLfloat b)
          : left(l), top(t), right(r), bottom(b) {}
  
      GLfloat left;
      GLfloat top;
      GLfloat right;
      GLfloat bottom;
  
      operator QRectF() const {return QRectF(left, top, right-left, bottom-top);}
  };
  
  class QOpenGL2PEXVertexArray
  {
  public:
      QOpenGL2PEXVertexArray() :
          vertexArray(0), vertexArrayStops(0),
          maxX(-2e10), maxY(-2e10), minX(2e10), minY(2e10),
          boundingRectDirty(true)
      { }
  
      inline void addRect(const QRectF &rect)
      {
          qreal top = rect.top();
          qreal left = rect.left();
          qreal bottom = rect.bottom();
          qreal right = rect.right();
  
          vertexArray << QOpenGLPoint(left, top)
                      << QOpenGLPoint(right, top)
                      << QOpenGLPoint(right, bottom)
                      << QOpenGLPoint(right, bottom)
                      << QOpenGLPoint(left, bottom)
                      << QOpenGLPoint(left, top);
      }
  
      inline void addQuad(const QRectF &rect)
      {
          qreal top = rect.top();
          qreal left = rect.left();
          qreal bottom = rect.bottom();
          qreal right = rect.right();
  
          vertexArray << QOpenGLPoint(left, top)
                      << QOpenGLPoint(right, top)
                      << QOpenGLPoint(left, bottom)
                      << QOpenGLPoint(right, bottom);
  
      }
  
      inline void addVertex(const GLfloat x, const GLfloat y)
      {
          vertexArray.add(QOpenGLPoint(x, y));
      }
  
      void addPath(const QVectorPath &path, GLfloat curveInverseScale, bool outline = true);
      void clear();
  
      QOpenGLPoint*        data() {return vertexArray.data();}
      int *stops() const { return vertexArrayStops.data(); }
      int stopCount() const { return vertexArrayStops.size(); }
      QOpenGLRect         boundingRect() const;
  
      int vertexCount() const { return vertexArray.size(); }
  
      void lineToArray(const GLfloat x, const GLfloat y);
  
  private:
      QDataBuffer<QOpenGLPoint> vertexArray;
      QDataBuffer<int>      vertexArrayStops;
  
      GLfloat     maxX;
      GLfloat     maxY;
      GLfloat     minX;
      GLfloat     minY;
      bool        boundingRectDirty;
      void addClosingLine(int index);
      void addCentroid(const QVectorPath &path, int subPathIndex);
  };
  
  QT_END_NAMESPACE
  
  #endif
  