// *****************************************************************
// Delphi-OpenCV Demo
// Copyright (C) 2013 Project Delphi-OpenCV
// ****************************************************************
// Contributor:
// laentir Valetov
// email:laex@bk.ru
// ****************************************************************
// You may retrieve the latest version of this file at the GitHub,
// located at git://github.com/Laex/Delphi-OpenCV.git
// ****************************************************************
// The contents of this file are used with permission, subject to
// the Mozilla Public License Version 1.1 (the "License"); you may
// not use this file except in compliance with the License. You may
// obtain a copy of the License at
// http://www.mozilla.org/MPL/MPL-1_1Final.html
//
// Software distributed under the License is distributed on an
// "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
// implied. See the License for the specific language governing
// rights and limitations under the License.
// *******************************************************************

program cv_GetSubRect;

{$APPTYPE CONSOLE}
{$R *.res}

uses
  System.SysUtils,
  highgui_c,
  core_c,
  Core.types_c,
  imgproc_c,
  imgproc.types_c,
  uResourcePaths;

const
  filename = cResourceMedia + 'opencv_logo_with_text.png';

var
  image: pIplImage = nil;
  cut_image: pIplImage = nil;
  R: TCvRect;

begin
  try
    image := cvLoadImage(filename, CV_LOAD_IMAGE_UNCHANGED);
    R := CvRect(50, 50, 250, 250);
    cut_image := cvCreateImage(CvSize(0, 0), image^.depth, image^.nChannels);
    cut_image := pIplImage(cvGetSubRect(image, cut_image, R));
    cvNamedWindow(filename, CV_WINDOW_AUTOSIZE);
    cvNamedWindow('Cut image', CV_WINDOW_AUTOSIZE);
    cvRectangle(image, CvPoint(50, 50), CvPoint(50 + 250, 50 + 250), CvScalar(150));
    cvShowImage(filename, image);
    cvShowImage('Cut image', cut_image);
    cvWaitKey(0);
    cvReleaseImage(image);
    cvReleaseImage(cut_image);
    cvDestroyAllWindows;
  except
    on E: Exception do
      Writeln(E.ClassName, ': ', E.Message);
  end;

end.