using OpenCvSharp;
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Imaging;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace OTSIncAReportApp._1_UI.OTSReportExport.DataIntegration
{
    class ImageProcessor
    {

        /// <summary>
        /// 颗粒图片缩放到固定大小
        /// </summary>
        /// <param name="sourceFile"></param>
        /// <param name="targetWidth"></param>
        /// <param name="targetHeight"></param>
        /// <returns></returns>
        public Bitmap  ResizeImageWithPadding(Bitmap sourceFile, int targetWidth, int targetHeight, Color color)
        {
            var originalImage = sourceFile;

                // 计算缩放后的尺寸，保持宽高比  
            int scaledWidth, scaledHeight;
                if (originalImage.Width > originalImage.Height)
                {
                    scaledWidth = targetWidth;
                    scaledHeight = (int)(targetWidth * ((double)originalImage.Height / originalImage.Width));
                }
                else
                {
                    scaledHeight = targetHeight;
                    scaledWidth = (int)(targetHeight * ((double)originalImage.Width / originalImage.Height));
                }

            // 创建新的Bitmap，大小为目标尺寸  
            Bitmap newImage = new Bitmap(targetWidth, targetHeight);

            Graphics graphic = Graphics.FromImage(newImage);
                    
                        // 填充整个图像为黑色  
                        graphic.Clear(color);

                        // 设置高质量插值法  
                        //graphic.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;

                        // 计算图片在新图像中的位置（居中）  
                        int x = (targetWidth - scaledWidth) / 2;
                        int y = (targetHeight - scaledHeight) / 2;

                        // 绘制缩放后的图片  
                        graphic.DrawImage(originalImage, new Rectangle(x, y, scaledWidth, scaledHeight));

                    // 保存新图像  
                    //newImage.Save(destFile, ImageFormat.Png); // 或使用ImageFormat.Jpeg等  

                        return newImage;
                
            
        }
        /// <summary>
        /// 传入单颗颗粒的particle类对象,返回从field中抠取出的bitmap对象,抠取单颗颗粒
        /// </summary>
        /// <param name="in_cotsparticleclr"></param>
        /// <returns></returns>
        public Bitmap GetBitmapByParticle(Bitmap ls_bt, Rectangle offset_rect)
        {
            //为了能把整个颗粒显示完整
            offset_rect.X = offset_rect.X - 5;
            offset_rect.Y = offset_rect.Y - 5;
            offset_rect.Width = offset_rect.Width + 10;
            offset_rect.Height = offset_rect.Height + 10;

            //防止计算偏差后，有坐标溢出现象
            if (offset_rect.X < 0)
                offset_rect.X = 0;
            if (offset_rect.Y < 0)
                offset_rect.Y = 0;
            if (offset_rect.X + offset_rect.Width > ls_bt.Width)
            {
                offset_rect.Width = ls_bt.Width - offset_rect.X;
            }
            if (offset_rect.Y + offset_rect.Height > ls_bt.Height)
            {
                offset_rect.Height = ls_bt.Height - offset_rect.Y;
            }

            Bitmap new_ret_bp;
            //防止为0后面计算出错
            if (offset_rect.Width > 0 && offset_rect.Height > 0)
            {
                //最后通过list_showsegment组建成新的图片，进行返回
                new_ret_bp = ls_bt.Clone(offset_rect, ls_bt.PixelFormat);
            }
            else
            {

                new_ret_bp = new Bitmap(offset_rect.Width, offset_rect.Height);
            }

            return new_ret_bp;
        }

        public  Bitmap GetReZoomBitmap(Bitmap in_bp)
        {
            Mat src = OpenCvSharp.Extensions.BitmapConverter.ToMat(in_bp);
            Mat dst = new Mat();

            Cv2.AdaptiveThreshold(src, dst, 255, AdaptiveThresholdTypes.MeanC, ThresholdTypes.Binary, 27, 25);

            //绝对缩放,
            Mat dst2 = new Mat();
            int col = dst.Width;//获取原图像的大小
            int rows = dst.Height;
            Cv2.Resize(dst, dst2, new OpenCvSharp.Size(4 * col, 4 * rows), 0, 0, InterpolationFlags.Cubic);

            return OpenCvSharp.Extensions.BitmapConverter.ToBitmap(dst2);
        }

        /// <summary> 
        /// Resize图片
        /// </summary>
        /// <param name="bmp">原始Bitmap</param>
        /// <param name="newW">新的宽度</param>
        /// <param name="newH">新的高度</param>
        /// <returns>处理以后的图片</returns>
        public  Bitmap KiResizeImage(Bitmap bmp, int newW, int newH)
        {
            try
            {
                Bitmap b = new Bitmap(newW, newH);
                Graphics g = Graphics.FromImage(b);

                // 插值算法的质量
                g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;

                g.DrawImage(bmp, new Rectangle(0, 0, newW, newH), new Rectangle(0, 0, bmp.Width, bmp.Height), GraphicsUnit.Pixel);
                g.Dispose();

                return b;
            }
            catch
            {
                return null;
            }
        }
    }
}