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OpenCV_GLWidget.cpp
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OpenCV_GLWidget.cpp
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#include "OpenCV_GLWidget.h"
#include <iostream>
OpenCV_GLWidget::OpenCV_GLWidget(QWidget* parent, const QGLWidget* shareWidget, Qt::WindowFlags f) :
QGLWidget(parent, shareWidget, f){}
OpenCV_GLWidget::~OpenCV_GLWidget() {}
void OpenCV_GLWidget::renderImage(const QImage& frame){
_GLFrame = QGLWidget::convertToGLFormat(frame);
this->updateGL();
}
void OpenCV_GLWidget::resizeGL(int width, int height){
// Setup our viewport to be the entire size of the window
glViewport(0, 0, width, height);
// Change to the projection matrix and set orthogonal projection
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0, width, height, 0, 0, 1);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}
void OpenCV_GLWidget::paintGL() {
glClear (GL_COLOR_BUFFER_BIT);
glClearColor (0.0, 0.0, 0.0, 1.0);
if (!_GLFrame.isNull()) {
_GLFrame = _GLFrame.scaled(size(), Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
glEnable(GL_TEXTURE_2D);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA, _GLFrame.width(), _GLFrame.height(), 0, GL_RGBA, GL_UNSIGNED_BYTE, _GLFrame.bits() );
glBegin(GL_QUADS);
glTexCoord2f(0, 0); glVertex2f(0, _GLFrame.height());
glTexCoord2f(0, 1); glVertex2f(0, 0);
glTexCoord2f(1, 1); glVertex2f(_GLFrame.width(), 0);
glTexCoord2f(1, 0); glVertex2f(_GLFrame.width(), _GLFrame.height());
glEnd();
glDisable(GL_TEXTURE_2D);
glFlush();
}
}