1 files changed, 98 insertions, 0 deletions
diff --git a/ftnoir_tracker_pt/video_widget.cpp b/ftnoir_tracker_pt/video_widget.cpp
new file mode 100644
index 00000000..c2b41da1
--- /dev/null
+++ b/ftnoir_tracker_pt/video_widget.cpp
@@ -0,0 +1,98 @@
+/* Copyright (c) 2012 Patrick Ruoff
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * 20130312, WVR: Add 7 lines to resizeGL after resize_frame. This should lower CPU-load.
+ */
+
+#include "video_widget.h"
+
+#include <QDebug>
+
+using namespace cv;
+using namespace std;
+using namespace boost;
+
+// ----------------------------------------------------------------------------
+void VideoWidget::initializeGL()
+{
+	glClearColor(0.0, 0.0, 0.0, 0.0);
+	glMatrixMode(GL_MODELVIEW);
+	glLoadIdentity();
+}
+
+void VideoWidget::resizeGL(int w, int h)
+{
+	// setup 1 to 1 projection
+	glViewport(0, 0, w, h);
+	glMatrixMode(GL_PROJECTION);
+	glLoadIdentity();
+	glOrtho(0, w, 0, h, -1, 1);
+	resize_frame();
+	glDisable(GL_DEPTH_TEST);
+	glBegin(GL_QUADS);
+	glVertex2f(0,0);
+	glVertex2f(1,0);
+	glVertex2f(1,1);
+	glVertex2f(0,1);
+	glEnd(); 
+}
+
+void VideoWidget::paintGL()
+{
+	glClear(GL_COLOR_BUFFER_BIT);
+	if (!resized_qframe.isNull())
+	{
+		glDrawPixels(resized_qframe.width(), resized_qframe.height(), GL_RGBA, GL_UNSIGNED_BYTE, resized_qframe.bits());
+		
+		const int crosshair_radius = 10;
+		const int crosshair_thickness = 1;
+
+		glColor3f(1.0, 0.0, 0.0);
+		glLineWidth(crosshair_thickness);
+		int x,y;
+		for (vector<Vec2f>::iterator iter = points->begin();
+			 iter != points->end();
+			 ++iter)
+		{
+			x = (*iter)[0] * resized_qframe.width() + resized_qframe.width()/2.0  + 0.5;
+			y = (*iter)[1] * resized_qframe.width() + resized_qframe.height()/2.0 + 0.5;
+			
+			glBegin(GL_LINES);
+			glVertex2i(x-crosshair_radius, y);
+			glVertex2i(x+crosshair_radius, y);
+			glEnd();
+			glBegin(GL_LINES);
+			glVertex2i(x, y-crosshair_radius);
+			glVertex2i(x, y+crosshair_radius);
+			glEnd();
+		}
+	}
+	glFlush();
+}
+
+
+void VideoWidget::resize_frame()
+{
+	if (!qframe.isNull())
+		resized_qframe = qframe.scaled(this->size(), Qt::KeepAspectRatio);
+}
+
+
+void VideoWidget::update(Mat frame, shared_ptr< vector<Vec2f> > points)
+{
+	this->frame = frame;
+	this->points = points;
+
+	// convert to QImage
+	if (frame.channels() == 3)
+		qframe = QImage((const unsigned char*)(frame.data), frame.cols, frame.rows, frame.step, QImage::Format_RGB888).rgbSwapped();
+	else if (frame.channels() == 1)
+		qframe = QImage((const unsigned char*)(frame.data), frame.cols, frame.rows, frame.step, QImage::Format_Indexed8);
+	qframe = QGLWidget::convertToGLFormat(qframe);
+
+	resize_frame();
+	updateGL();
+}