New functions with QT GUI:

- 3 new points mostly done:
      - OpenGL support enabled (windows are rendered using GPU)
      - Save current screen (with overlay and so on...) with shortcut CTRL+S
      - Text rendering (with any system font, and possibility to set the style - normal, italic,... - the weight - normal, bold, ... - the color, the spacing between letters, and so on...)

CMakeLists.txt

@@ -510,7 +510,7 @@ if (QT4_FOUND AND AUTOSWITCH_QT)
     set(WITH_QT ON CACHE BOOL "Build with QT Backend support")
     find_package (OpenGL QUIET)
     if (QT_QTOPENGL_FOUND AND OPENGL_FOUND)
-			set(WITH_QT_OPENGL ON CACHE BOOL "Add OpenGL extention to QT")
+			set(WITH_QT_OPENGL ON CACHE BOOL "Add OpenGL extension to QT")
     endif()
 endif()
     

modules/core/include/opencv2/core/core_c.h

@@ -1370,18 +1370,21 @@ CVAPI(int)  cvInitLineIterator( const CvArr* image, CvPoint pt1, CvPoint pt2,
 
 #define CV_FONT_VECTOR0    CV_FONT_HERSHEY_SIMPLEX
 
+
 /* Font structure */
 typedef struct CvFont
 {
-    int         font_face; /* =CV_FONT_* */
-    const int*  ascii; /* font data and metrics */
+	const char* nameFont;		//Qt:nameFont
+	CvScalar color;				//Qt:ColorFont -> cvScalar(blue_component, green_component, red\_component[, alpha_component])
+    int         font_face; 		//Qt: bool italic         /* =CV_FONT_* */
+    const int*  ascii; 			/* font data and metrics */
     const int*  greek;
     const int*  cyrillic;
     float       hscale, vscale;
-    float       shear; /* slope coefficient: 0 - normal, >0 - italic */
-    int         thickness; /* letters thickness */
-    float       dx; /* horizontal interval between letters */
-    int         line_type;
+    float       shear; 			/* slope coefficient: 0 - normal, >0 - italic */
+    int         thickness; 		//Qt: weight               /* letters thickness */
+    float       dx; 			/* horizontal interval between letters */
+    int         line_type;		//Qt: PointSize
 }
 CvFont;
 
@@ -1408,6 +1411,8 @@ CVAPI(void)  cvPutText( CvArr* img, const char* text, CvPoint org,
 CVAPI(void)  cvGetTextSize( const char* text_string, const CvFont* font,
                             CvSize* text_size, int* baseline );
 
+
+
 /* Unpacks color value, if arrtype is CV_8UC?, <color> is treated as
    packed color value, otherwise the first channels (depending on arrtype)
    of destination scalar are set to the same value = <color> */

modules/highgui/include/opencv2/highgui/highgui.hpp

@@ -64,14 +64,21 @@ CV_EXPORTS void setWindowProperty(const string& winname, int prop_id, double pro
 CV_EXPORTS double getWindowProperty(const string& winname, int prop_id);//YV
 
 
-//Only for QT
+//Only for Qt
+//------------------------
+CV_EXPORTS void addText( const Mat& img, const char* text, Point org, CvFont font);
+
 CV_EXPORTS void displayOverlay(const string& winname, const string& text, int delayms);
 CV_EXPORTS void displayStatusBar(const string& winname, const string& text, int delayms);
+
+typedef void (CV_CDECL *OpenGLCallback)(void* userdata);
+CV_EXPORTS void createOpenGLCallback(const string& winname, CvOpenGLCallback callbackOpenGL, void* userdata CV_DEFAULT(0));
+
 CV_EXPORTS void saveWindowParameters(const string& windowName);
 CV_EXPORTS void loadWindowParameters(const string& windowName);
 CV_EXPORTS  int startLoop(int (*pt2Func)(int argc, char *argv[]), int argc, char* argv[]);
 CV_EXPORTS  void stopLoop();
-
+//-------------------------
 
 CV_EXPORTS void imshow( const string& winname, const Mat& mat );
 

modules/highgui/include/opencv2/highgui/highgui_c.h

@@ -57,9 +57,33 @@ extern "C" {
 *                                  Basic GUI functions                                   *
 \****************************************************************************************/
 //YV
-//-----------New for QT
+//-----------New for Qt
+/* For font */
+enum {	CV_FONT_LIGHT 			= 25,//QFont::Light,
+		CV_FONT_NORMAL 			= 50,//QFont::Normal,
+		CV_FONT_DEMIBOLD 		= 63,//QFont::DemiBold,
+		CV_FONT_BOLD 			= 75,//QFont::Bold,
+		CV_FONT_BLACK 			= 87 //QFont::Black
+};
+
+enum {	CV_STYLE_NORMAL			= 0,//QFont::StyleNormal,
+		CV_STYLE_ITALIC 		= 1,//QFont::StyleItalic,
+		CV_STYLE_OBLIQUE 		= 2 //QFont::StyleOblique
+};
+/* ---------*/
+
+//for color cvScalar(blue_component, green_component, red\_component[, alpha_component])
+//and alpha= 0 <-> 0xFF (not transparent <-> transparent)
+CVAPI(CvFont) cvFont_Qt(const char* nameFont, int pointSize CV_DEFAULT(-1), CvScalar color = cvScalarAll(0), int weight CV_DEFAULT(CV_FONT_NORMAL),  int style CV_DEFAULT(CV_STYLE_NORMAL), int spacing CV_DEFAULT(0));
+
+CVAPI(void) cvAddText( CvArr* img, const char* text, CvPoint org, CvFont *arg2);
+
 CVAPI(void) cvDisplayOverlay(const char* name, const char* text, int delayms);
 CVAPI(void) cvDisplayStatusBar(const char* name, const char* text, int delayms);
+
+typedef void (CV_CDECL *CvOpenGLCallback)(void* userdata);
+CVAPI(void) cvCreateOpenGLCallback( const char* window_name, CvOpenGLCallback callbackOpenGL, void* userdata CV_DEFAULT(NULL));
+
 CVAPI(void) cvSaveWindowParameters(const char* name);
 CVAPI(void) cvLoadWindowParameters(const char* name);
 CVAPI(int) cvStartLoop(int (*pt2Func)(int argc, char *argv[]), int argc, char* argv[]);

modules/highgui/src/precomp.hpp

@@ -170,7 +170,6 @@ void cvSetModeWindow_W32(const char* name, double prop_value);
 void cvSetModeWindow_GTK(const char* name, double prop_value);
 void cvSetModeWindow_CARBON(const char* name, double prop_value);
 
-
 //for QT
 #if defined (HAVE_QT)
 double cvGetModeWindow_QT(const char* name);

modules/highgui/src/window.cpp

@@ -189,11 +189,23 @@ int startWindowThread()
 }
 
 #if defined (HAVE_QT)
+
+void addText( const Mat& img, const string& text, Point org, CvFont font)
+{
+	CvMat _img = img;
+	cvAddText( &_img, text.c_str(), CvPoint(org),&font);
+}
+
 void displayStatusBar(const string& name,  const string& text, int delayms)
 {
 	cvDisplayStatusBar(name.c_str(),text.c_str(), delayms);
 }
 
+void createOpenGLCallback(const string& name,  OpenGLCallback callback, void* param)
+{
+	cvCreateOpenGLCallback(name.c_str(),callback, param);
+}
+
 void displayOverlay(const string& name,  const string& text, int delayms)
 {
 	cvDisplayOverlay(name.c_str(),text.c_str(), delayms);

modules/highgui/src/window_QT.cpp

@@ -51,10 +51,44 @@ static bool multiThreads = false;
 static int last_key = -1;
 QWaitCondition key_pressed;
 QMutex mutexKey;
-
 static const unsigned int threshold_zoom_img_region = 15;//the minimum zoom value to start displaying the values' grid
 //end static and global
 
+
+
+CV_IMPL CvFont cvFont_Qt(const char* nameFont, int pointSize,CvScalar color,int weight,int style, int spacing)
+{
+
+	/*
+	//nameFont   <- only Qt
+	//CvScalar color   <- only Qt (blue_component, green_component, red\_component[, alpha_component])
+    int         font_face;//<- style in Qt
+    const int*  ascii;
+    const int*  greek;
+    const int*  cyrillic;
+    float       hscale, vscale;
+    float       shear;
+    int         thickness;//<- weight in Qt
+    float       dx;//spacing letter in Qt (0 default) in pixel
+    int         line_type;//<- pointSize in Qt
+	*/
+	CvFont f = {nameFont,color,style,NULL,NULL,NULL,0,0,0,weight,spacing,pointSize};
+    return f;
+}
+
+
+
+CV_IMPL void cvAddText( CvArr* img, const char* text, CvPoint org, CvFont* font)
+{
+    QMetaObject::invokeMethod(&guiMainThread,
+						  "putText",
+						  Qt::AutoConnection,
+						  Q_ARG(void*, (void*) img),
+						  Q_ARG(QString,QString(text)),
+						  Q_ARG(QPoint, QPoint(org.x,org.y)),
+						  Q_ARG(void*,(void*) font));
+}
+
 double cvGetRatioWindow_QT(const char* name)
 {
 	double result = -1;
@@ -299,10 +333,10 @@ CV_IMPL int icvInitSystem()
 		new QApplication(parameterSystemC,parameterSystemV);
 
         wasInitialized = 1;
-        qDebug()<<"init done"<<endl;
+        qDebug()<<"init done";
         
         #if defined(OPENCV_GL)//OK tested !
-		qDebug()<<"opengl support available"<<endl;
+		qDebug()<<"opengl support available";
 		#endif
     }
 
@@ -484,12 +518,6 @@ CV_IMPL void cvShowImage( const char* name, const CvArr* arr )
 }
 
 
-
-
-
-
-
-
 //----------OBJECT----------------
 
 GuiReceiver::GuiReceiver() : _bTimeOut(false)
@@ -498,12 +526,43 @@ GuiReceiver::GuiReceiver() : _bTimeOut(false)
     qApp->setQuitOnLastWindowClosed ( false );//maybe the user would like to access this setting
 }
 
+void GuiReceiver::putText(void* arg1, QString text, QPoint org, void* arg2)
+{
+	CV_Assert(arg1);
+	
+	IplImage* img = (IplImage*)arg1;
+		
+	//for now, only support QImage::Format_RGB888
+	if (img->depth !=IPL_DEPTH_8U || img->nChannels != 3)
+		return;
+		
+	CvFont* font = (CvFont*)arg2;
+	
+	
+	
+	QImage qimg((uchar*) img->imageData, img->width, img->height,QImage::Format_RGB888);
+	QPainter qp(&qimg);
+	if (font)
+	{
+		QFont f(font->nameFont, font->line_type/*PointSize*/, font->thickness/*weight*/);
+		f.setStyle((QFont::Style)font->font_face/*style*/);
+		f.setLetterSpacing ( QFont::AbsoluteSpacing, font->dx/*spacing*/ );
+		//cvScalar(blue_component, green_component, red\_component[, alpha_component])
+		//Qt map non-transparent to 0xFF and transparent to 0
+		//OpenCV scalar is the reverse, so 255-font->color.val[3]
+		qp.setPen(QColor(font->color.val[2],font->color.val[1],font->color.val[0],255-font->color.val[3]));
+		qp.setFont ( f );
+	}
+	qp.drawText (org, text );
+	qp.end();
+}
+
 void GuiReceiver::saveWindowParameters(QString name)
 {
     QPointer<CvWindow> w = icvFindWindowByName( name.toLatin1().data() );
 
     if (w)
-	w->writeSettings();
+		w->writeSettings();
 }
 
 void GuiReceiver::loadWindowParameters(QString name)
@@ -511,7 +570,7 @@ void GuiReceiver::loadWindowParameters(QString name)
     QPointer<CvWindow> w = icvFindWindowByName( name.toLatin1().data() );
 
     if (w)
-	w->readSettings();
+		w->readSettings();
 }
 
 double GuiReceiver::getRatioWindow(QString name)
@@ -625,13 +684,6 @@ void GuiReceiver::createWindow( QString name, int flags )
     new CvWindow(name, flags);
 }
 
-void GuiReceiver::refreshEvents()
-{
-    QAbstractEventDispatcher::instance(qApp->instance()->thread())->processEvents(QEventLoop::AllEvents);
-    //qDebug()<<"refresh ?"<<endl;
-    //qApp->processEvents(QEventLoop::AllEvents);
-}
-
 void GuiReceiver::timeOut()
 {
     _bTimeOut = true;
@@ -805,7 +857,7 @@ void CvTrackbar::createDialog()
 
     bool ok= false;
 
-    //crash if I access the value directly to give them to QInputDialog, so do a copy first.
+    //crash if I access the values directly and give them to QInputDialog, so do a copy first.
     int value = slider->value();
     int step = slider->singleStep();
     int min = slider->minimum();
@@ -1142,15 +1194,14 @@ ViewPort::ViewPort(CvWindow* arg, int arg2, int arg3)
     positionCorners = QRect(0,0,size().width(),size().height());
     on_mouse = NULL;
     mouseCoordinate = QPoint(-1,-1);
-    on_openGL = NULL;
+    on_openGL_draw3D = NULL;
 
 
 #if defined(OPENCV_GL)
     if ( mode_display == CV_MODE_OPENGL)
     {
-		QGLWidget* wGL = new QGLWidget(QGLFormat(QGL::SampleBuffers));
-		setViewport(wGL);
-	
+		//QGLWidget* wGL = new QGLWidget(QGLFormat(QGL::SampleBuffers));
+		setViewport(new QGLWidget(QGLFormat(QGL::SampleBuffers)));
 		initGL();
     }
 #endif
@@ -1192,16 +1243,30 @@ void ViewPort::saveView()
 		
 		// Save it..
 		if (QString::compare(extension, "png", Qt::CaseInsensitive) == 0)
+		{
 			image2Draw_qt_resized.save(fileName, "PNG");
+			return;
+		}
 		
 		if (QString::compare(extension, "jpg", Qt::CaseInsensitive) == 0)
+		{
 			image2Draw_qt_resized.save(fileName, "JPG");
+			return;
+		}
 			
 		if (QString::compare(extension, "bmp", Qt::CaseInsensitive) == 0)
+		{
 			image2Draw_qt_resized.save(fileName, "BMP");
+			return;
+		}
 			
 		if (QString::compare(extension, "jpeg", Qt::CaseInsensitive) == 0)
+		{
 			image2Draw_qt_resized.save(fileName, "JPEG");
+			return;
+		}
+		
+		qDebug()<<"file extension not recognized, please choose between JPG, JPEG, BMP or PNG";
 	}
 }
 
@@ -1289,10 +1354,11 @@ inline bool ViewPort::isSameSize(IplImage* img1,IplImage* img2)
 
 void ViewPort::updateImage(void* arr)
 {
-    if (!arr)
-	CV_Error(CV_StsNullPtr, "NULL arr pointer (in showImage)" );
-
-    IplImage* tempImage = (IplImage*)arr;
+    //if (!arr)
+	//CV_Error(CV_StsNullPtr, "NULL arr pointer (in showImage)" );
+	CV_Assert(arr);
+	
+    IplImage* tempImage = (IplImage*)arr;		
 
     if (!isSameSize(image2Draw_ipl,tempImage))
     {
@@ -1319,7 +1385,7 @@ void ViewPort::setMouseCallBack(CvMouseCallback m, void* param)
 
 void ViewPort::setOpenGLCallback(CvOpenGLCallback func,void* userdata)
 {
-	 on_openGL = func;
+	 on_openGL_draw3D = func;
 	 on_openGL_param = userdata;
  }
  
@@ -1469,11 +1535,9 @@ void ViewPort::mouseMoveEvent(QMouseEvent *event)
 
     if (param_matrixWorld.m11()>1 && event->buttons() == Qt::LeftButton)
     {
-	QPointF dxy = (pt - positionGrabbing)/param_matrixWorld.m11();
-
-	positionGrabbing = event->pos();
-
-	moveView(dxy);
+		QPointF dxy = (pt - positionGrabbing)/param_matrixWorld.m11();
+		positionGrabbing = event->pos();
+		moveView(dxy);
     }
 
     //I update the statusbar here because if the user does a cvWaitkey(0) (like with inpaint.cpp)
@@ -1553,8 +1617,6 @@ void ViewPort::resizeEvent ( QResizeEvent *event)
 	image2Draw_qt_resized = image2Draw_qt.scaled(this->width(),this->height(),Qt::IgnoreAspectRatio,Qt::SmoothTransformation);
 	
     controlImagePosition();
-    //ratioX=float(image2Draw_ipl->width)/float(width());
-    //ratioY=float(image2Draw_ipl->height)/float(height());
     ratioX=width()/float(image2Draw_ipl->width);
     ratioY=height()/float(image2Draw_ipl->height);
 
@@ -1590,11 +1652,16 @@ void ViewPort::paintEvent(QPaintEvent* event)
     draw2D(&myPainter);
 
 #if defined(OPENCV_GL)
-    if ( mode_display == CV_MODE_OPENGL && on_openGL)
+    if ( mode_display == CV_MODE_OPENGL && on_openGL_draw3D)
     {
+	myPainter.beginNativePainting();
+
 	setGL(width(),height());
-	draw3D();
+	on_openGL_draw3D(on_openGL_param);
+	//draw3D();
 	unsetGL();
+	
+	myPainter.endNativePainting();
     }
 #endif
 
@@ -1841,8 +1908,8 @@ void ViewPort::draw3D()
     //draw scene here
     glLoadIdentity();
 
-    glTranslated(0.0, 0.0, -1.0);
-    // QVector3D p = convert(positionMouse);
+    glTranslated(10.0, 10.0, -1.0);
+    // QVector3D p = convert(mouseCoordinate);
     //glTranslated(p.x(),p.y(),p.z());
 
     glRotatef( 55, 1, 0, 0 );
@@ -1859,12 +1926,12 @@ void ViewPort::draw3D()
     };
 
     for (int i = 0; i < 6; ++i) {
-	glColor3ub( i*20, 100+i*10, i*42 );
-	glBegin(GL_QUADS);
-	for (int j = 0; j < 4; ++j) {
-	    glVertex3d(0.2 * coords[i][j][0], 0.2 * coords[i][j][1], 0.2 * coords[i][j][2]);
-	}
-	glEnd();
+		glColor3ub( i*20, 100+i*10, i*42 );
+		glBegin(GL_QUADS);
+		for (int j = 0; j < 4; ++j) {
+			glVertex3d(0.2 * coords[i][j][0], 0.2 * coords[i][j][1], 0.2 * coords[i][j][2]);
+		}
+		glEnd();
     }
 }
 #endif

modules/highgui/src/window_QT.h

@@ -88,13 +88,11 @@ enum {	shortcut_zoom_normal 	= Qt::CTRL + Qt::Key_Z,
 		shortcut_panning_up 	= Qt::CTRL + Qt::Key_Up,
 		shortcut_panning_down 	= Qt::CTRL + Qt::Key_Down
 	};
-//end enum
 
-typedef void (CV_CDECL *CvOpenGLCallback)(void* userdata);
+//end enum
 
 class CvWindow;
 class ViewPort;
-//class CvTrackbar;
 
 class GuiReceiver : public QObject
 {
@@ -118,7 +116,6 @@ public slots:
     void showImage(QString name, void* arr);
     void displayInfo( QString name, QString text, int delayms );
     void displayStatusBar( QString name, QString text, int delayms );
-    void refreshEvents();
     void timeOut();
     void toggleFullScreen(QString name, double flags );
     double isFullScreen(QString name);
@@ -129,6 +126,7 @@ public slots:
     void saveWindowParameters(QString name);
     void loadWindowParameters(QString name);
     void setOpenGLCallback(QString window_name, void* callbackOpenGL, void* userdata);
+    void putText(void* arg1, QString text, QPoint org, void* font);
 
 };
 
@@ -268,7 +266,7 @@ private:
     void* on_mouse_param;
     
     //for opengl callback
-    CvOpenGLCallback on_openGL;
+    CvOpenGLCallback on_openGL_draw3D;
 	void* on_openGL_param;
 
     bool isSameSize(IplImage* img1,IplImage* img2);