cqtopencvviewergl.h

/*=========================================================================

  Program:   OpenCVDisparityTuner

  Copyright (c) Julien Jomier
  All rights reserved.

     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.

=========================================================================*/
#ifndef CQTOPENCVVIEWERGL_H
#define CQTOPENCVVIEWERGL_H

#include <QOpenGLWidget>
#include <opencv2/core/core.hpp>

class CQtOpenCVViewerGl : public QOpenGLWidget
{

Q_OBJECT
public:
  explicit CQtOpenCVViewerGl(QWidget *parent = 0);

signals:
  void imageSizeChanged( int outW, int outH ); /// Used to resize the image outside the widget

public slots:
  bool showImage(cv::Mat image); /// Used to set the image to be viewed

protected:
  void 	initializeGL(); /// OpenGL initialization
  void 	paintGL(); /// OpenGL Rendering
  void 	resizeGL(int width, int height);        /// Widget Resize Event

  void  updateScene();
  void  renderImage();

private:
  bool  mSceneChanged;          /// Indicates when OpenGL view is to be redrawn

  QImage   mRenderQtImg;           /// Qt image to be rendered
  cv::Mat  mOrigImage;             /// original OpenCV image to be shown

  QColor   mBgColor;		/// Background color

  int     mOutH;                  /// Resized Image height
  int     mOutW;                  /// Resized Image width
  float   mImgRatio;             /// height/width ratio
  int     mPosX;                  /// Top left X position to render image in the center of widget
  int     mPosY;                  /// Top left Y position to render image in the center of widget

};

#endif // CQTOPENCVVIEWERGL_H