config_gen/src/pixel.cpp (4ef7955) - libetherpix · BlinkenArea

pixel.cpp

/*
 * EtherPix config file generator
 *
 * Copyright 2010-2017 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 <iostream>

#include "box.h"
#include "object.h"
#include "pixel.h"
#include "point.h"

Pixel::Pixel(const Object *pObjPixel):
  mpObjPixel(pObjPixel),
  mX(0),
  mY(0)
{
}
  
int Pixel::pixCoord(const Point &pix0, const Point &pixSz,
                    unsigned int width, unsigned int height)
{
  // get center of pixel
  Box bounds;
  mpObjPixel->getBounds(bounds);
  Point pt;
  bounds.getCenter(pt);

// get coordinates of pixel
  Point delta = pt - pix0;
  mX = (unsigned int)(delta.mX / pixSz.mX);
  mY = (unsigned int)(delta.mY / pixSz.mY);

// check pixel coordinates
  if (mX >= width || mY >= height) {
    std::cerr << "pixel at " << pt.mX << "," << pt.mY
              << " is out of video frame (" << mX << "," << mY << ")"
              << std::endl;
    return -1;
  } else
    return 0;
}

void Pixel::writePixel(std::ostream & strm) const
{
  strm << " " << mX << "," << mY;
}

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