//// This code is part of Document Solutions for Imaging demos.// Copyright (c) MESCIUS inc. All rights reserved.//using System;using System.IO;using System.Drawing;using GrapeCity.Documents.Imaging;using GCDRAW = GrapeCity.Documents.Drawing;using DsImagingWeb.Demos.Common;
namespace DsImagingWeb.Demos{    // This example uses the GaussianBlurEffect to draw semi-transparent colored circles ('filters'),    // blurring the portion of the image behind them.    public class GaussianBlur2    {        public GcBitmap GenerateImage(Size pixelSize, float dpi, bool opaque, string[] sampleParams = null)        {            var colors = new Color[]            {                Color.Fuchsia,                Color.Orange,                Color.Black,                Color.Blue,                Color.Red,                Color.Yellow,                Color.White,                Color.Green,                Color.CornflowerBlue            };            colors.Shuffle();
            var imagePath = Path.Combine("Resources", "ImagesBis", "bahamas.jpg");            var bmp = new GcBitmap(imagePath);
            int xx = bmp.PixelWidth / 3;            int yy = bmp.PixelHeight / 3;            int maxr = Math.Min(xx / 2, yy / 2);            var rnd = Util.NewRandom();
            using var bmpBk = bmp.Clone();
            // Apply blur to a copy of the original bitmap:            bmpBk.ApplyEffect(GaussianBlurEffect.Get(24, GaussianBlurBorderMode.RepeatEdge));
            using var g = bmp.CreateGraphics();            var renderer = g.Renderer;            for (int i = 0; i < 9; i++)            {                int r = rnd.Next(maxr / 3, maxr);                var center = new PointF(rnd.Next(r, xx - r) + i % 3 * xx + 1, rnd.Next(r, yy - r) + i / 3 * yy + 1);                var rect = new RectangleF(center.X - r, center.Y - r, r + r, r + r);                var color = colors[i];
                // Use the blurred background to fill circles:                renderer.BackgroundBitmap = bmpBk;                g.FillEllipse(rect, Color.FromArgb(96, color));
                // Draw borders normally to hide the artifacts:                renderer.BackgroundBitmap = null;                g.DrawEllipse(rect, new GCDRAW.Pen(color, 2));            }
            return bmp;        }    }}