using OpenCvSharp;
using System;

namespace OpenCV
{
    class OpenCVClass : IDisposable
    {
        IplImage gray;
        IplImage inversion;
        IplImage bin;
        IplImage blur;
        IplImage zoomin;
        IplImage zoomout;
        IplImage resize;
        IplImage slice;

        public IplImage GrayScale(IplImage src)
        {
            gray = new IplImage(src.Size, BitDepth.U8, 1);
            Cv.CvtColor(src, gray, ColorConversion.BgrToGray);
            return gray;
        }

        public IplImage InversionImage(IplImage src)
        {
            inversion = new IplImage(src.Size, BitDepth.U8, 3);
            Cv.Not(src, inversion);
            return inversion;
        }

        public IplImage Binary(IplImage src)
        {
            bin = GrayScale(src);
            Cv.Threshold(bin, bin, 150, 255, ThresholdType.Binary);
            return bin;
        }

        public IplImage Blur(IplImage src)
        {
            blur = new IplImage(src.Size, BitDepth.U8, 3);
            Cv.Smooth(src, blur, SmoothType.Blur, 9); // param1은 홀수, 중간 픽셀 선택을 위함
            return blur;
        }

        public IplImage ZoomIn(IplImage src)
        {
            zoomin = new IplImage(new CvSize(src.Width * 2, src.Height * 2) , BitDepth.U8, 3);
            Cv.PyrUp(src, zoomin, CvFilter.Gaussian5x5);
            return zoomin;
        }

        public IplImage ZoomOut(IplImage src)
        {
            zoomout = new IplImage(new CvSize(src.Width / 2, src.Height / 2), BitDepth.U8, 3);
            Cv.PyrDown(src, zoomout, CvFilter.Gaussian5x5);
            return zoomout;
        }

        public IplImage Resize(IplImage src, double widthRate, double heightRate)
        {
            resize = new IplImage(new CvSize((int)(src.Width * widthRate), (int)(src.Height * heightRate)), BitDepth.U8, 3);
            Cv.Resize(src, resize, Interpolation.Linear);
            return resize;
        }

        public IplImage Slice(IplImage src, int x, int y, int roiWidht, int roiHeight)
        {
            //slice = new IplImage(new CvSize(roiWidht, roiHeight), BitDepth.U8, 3);

            //src.ROI = new CvRect(x, y, roiWidht, roiHeight);
            //src.SetROI(new CvRect(x, y, roiWidht, roiHeight));
            //Cv.SetImageROI(src, new CvRect(x, y, roiWidht, roiHeight));

            //Cv.Copy(src, slice);
            //Cv.Resize(src, slice);
            //slice = src.Clone(); // 속성까지 복사되어 채널 등 값이 변경됨

            //src.ResetROI();
            //Cv.ResetImageROI(src);

            CvRect roi = new CvRect(x, y, roiWidht, roiHeight);
            slice = src.Clone(roi);

            return slice;
        }

        public void Dispose()
        {
            if (gray != null)
                Cv.ReleaseImage(gray);
            if (inversion != null)
                Cv.ReleaseImage(inversion);
            if (bin != null)
                Cv.ReleaseImage(bin);
            if (blur != null)
                Cv.ReleaseImage(blur);
            if (zoomin != null)
                Cv.ReleaseImage(zoomin);
            if (zoomout != null)
                Cv.ReleaseImage(zoomout);
            if (resize != null)
                Cv.ReleaseImage(resize);
            if (slice != null)
                Cv.ReleaseImage(slice);
        }
    }
}