simulator/pixel.cpp (5c70d9d) - libetherpix · BlinkenArea

pixel.cpp

/*
 * EtherPix simulator
 *
 * Copyright 2017 Stefan Schuermans <stefan schuermans info>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, version 3 of the License.
 *
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

#include <gtkmm.h>
#include <stdint.h>

#include "bbox.h"
#include "pixel.h"
#include "transform.h"

/// default constructor
Pixel::Pixel():
  m_x(0.5),
  m_y(0.5),
  m_r(0.0),
  m_red  (64),
  m_green(64),
  m_blue (64)
{
}

/// constructor based on coordinates and radius
Pixel::Pixel(double x, double y, double r):
  m_x(x),
  m_y(y),
  m_r(r),
  m_red  (64),
  m_green(64),
  m_blue (64)
{
}

/**
 * @brief add pixel to the bounding box
 * @param[in,out] bb bounding box
 */
void Pixel::updateBBox(BBox &bb) const
{
  // add pixel plus some border to bounding box
  bb.add(m_x - 2 * m_r, m_y - 2 * m_r);
  bb.add(m_x + 2 * m_r, m_y + 2 * m_r);
}

/**
 * @brief draw pixel
 * @param[in] cairo cairo context for drawing
 * @param[in] tf coordinate transformation
 */
void Pixel::draw(Cairo::RefPtr<Cairo::Context> &cairo,
                 Transform const &tf) const
{
  double x, y, r;
  tf.apply(m_x, m_y, x, y);
  tf.applyZoom(m_r, r);
  cairo->set_source_rgb(m_red / 255.0, m_green / 255.0, m_blue / 255.0);
  cairo->arc(x, y, r, 0.0, 2.0 * M_PI);
  cairo->fill();
}

libetherpix

implement receiving packets