//// This code is part of Document Solutions for PDF .NET demos.// Copyright (c) MESCIUS inc. All rights reserved.//using System;using System.IO;using System.Drawing;using GrapeCity.Documents.Pdf;using GrapeCity.Documents.Svg;using GCTEXT = GrapeCity.Documents.Text;using GCDRAW = GrapeCity.Documents.Drawing;using DsPdfWeb.Demos.Common;
namespace DsPdfWeb.Demos{    // This sample generates some random abstract art using the SVG path API    // provided by GcSvgDocument.    public class SvgRandomArt    {        private Random _rnd = Util.NewRandom();
        public int CreatePDF(Stream stream)        {            using var svgDoc = new GcSvgDocument();            var svg = svgDoc.RootSvg;            svg.ViewBox = new SvgViewBox(0, 0, 100, 100);
            // Random art:            for (int i = 0; i < _rnd.Next(6, 12); i++)                AddFigure(svg, _rnd);
            // Border:            svg.Children.Add(new SvgRectElement()            {                Width = new SvgLength(100),                Height = new SvgLength(100),                Stroke = new SvgPaint(Color.FromArgb(_rnd.Next(256), _rnd.Next(256), _rnd.Next(256))),                Fill = SvgPaint.None            });            // Clip:            svg.Clip = new SvgClip(new SvgLength(0), new SvgLength(0), new SvgLength(100), new SvgLength(100));
            // Render the SVG image to a PDF:            var doc = new GcPdfDocument();            var page = doc.NewPage();            var g = page.Graphics;            var s = svgDoc.GetIntrinsicSize(SvgLengthUnits.Points);
            var margin = 72;            var rect = new RectangleF(margin, margin, page.Size.Width - margin * 2, page.Size.Width - margin * 2);            g.DrawSvg(svgDoc, rect);
            // Done:            doc.Save(stream);            return doc.Pages.Count;        }
        int Next100()        {            return _rnd.Next(100);        }
        void AddFigure(SvgSvgElement svg, Random rnd)        {            var pb = new SvgPathBuilder();            var startX = Next100();            var startY = Next100();            pb.AddMoveTo(false, startX, startY);            for (int i = 0; i < rnd.Next(20, 80); ++i)                AddCurve(pb, rnd);            pb.AddCurveTo(false, Next100(), Next100(), Next100(), Next100(), startX, startY);
            svg.Children.Add(new SvgPathElement()            {                FillRule = SvgFillRule.EvenOdd,                Fill = new SvgPaint(Color.FromArgb(rnd.Next(256), rnd.Next(256), rnd.Next(256))),                Stroke = new SvgPaint(Color.FromArgb(rnd.Next(256), rnd.Next(256), rnd.Next(256))),                StrokeWidth = new SvgLength(rnd.Next(20) / 10f, SvgLengthUnits.Percentage),                PathData = pb.ToPathData(),                FillOpacity = Next100() / 100f,                StrokeOpacity = Next100() / 100f,            });        }
        void AddCurve(SvgPathBuilder pb, Random _rnd)        {            switch (_rnd.Next(5))            {                case 0:                    pb.AddCurveTo(false, Next100(), Next100(), Next100(), Next100(), Next100(), Next100());                    break;                case 1:                    pb.AddSmoothCurveTo(false, Next100(), Next100(), Next100(), Next100());                    break;                case 2:                    pb.AddQuadraticBezierCurveTo(false, Next100(), Next100(), Next100(), Next100());                    break;                case 3:                    pb.AddSmoothQuadraticBezierCurveTo(false, Next100(), Next100());                    break;                case 4:                    pb.AddEllipticalArc(false, Next100(), Next100(), _rnd.Next(360),                        _rnd.Next(2) == 0 ? GCDRAW.ArcSize.Small : GCDRAW.ArcSize.Large,                        _rnd.Next(2) == 0 ? GCDRAW.SweepDirection.Clockwise : GCDRAW.SweepDirection.CounterClockwise,                        Next100(), Next100());                    break;            }        }    }}