#include "OpenGlWin.h"
#include <QApplication>
#include <QScreen>
#include <QOpenGLFunctions>

OpenGlWin::OpenGlWin(QWidget *parent): QOpenGLWidget(parent){
  setWindowFlags(Qt::FramelessWindowHint | Qt::WindowStaysOnTopHint | Qt::WindowTransparentForInput);
  setAttribute(Qt::WA_TransparentForMouseEvents);
  setAttribute(Qt::WA_TranslucentBackground);
  setAttribute(Qt::WA_NoSystemBackground, false);

  QRect screenGeometry = QGuiApplication::primaryScreen()->geometry();
  move(screenGeometry.topLeft());
  setFixedSize(screenGeometry.width() - 1, screenGeometry.height() - 1);

  this->show();
}

OpenGlWin::~OpenGlWin(){
}

void OpenGlWin::paintGL()
{
  QOpenGLFunctions* f = context()->functions();
  f->glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
  f->glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
}

void OpenGlWin::resizeGL(int w, int h)
{
  QOpenGLFunctions* f = context()->functions();
  f->glViewport(0, 0, w, h);
}

void OpenGlWin::initializeGL()
{
  QOpenGLFunctions* f = context()->functions();
  f->glClearColor(0.0f, 0.0f, 0.0f, 0.0f);

  qDebug() << QString::fromLatin1((const char*)f->glGetString(GL_VENDOR));
  qDebug() << QString::fromLatin1((const char*)f->glGetString(GL_RENDERER));
  qDebug() << QString::fromLatin1((const char*)f->glGetString(GL_VERSION));
}