//// 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 System.Numerics;using GrapeCity.Documents.Drawing;using GrapeCity.Documents.Text;using GrapeCity.Documents.Svg;using GCTEXT = GrapeCity.Documents.Text;using GCDRAW = GrapeCity.Documents.Drawing;
namespace DsImagingWeb.Demos{    // This example shows how to render an arch on GcSvgGraphics    // using graphics paths. The arch is positioned in the center    // of the resultant image using graphics transformation matrix.    public class SvgGraphicsArch    {        public string DefaultMime { get => Common.Util.MimeTypes.SVG; }
        public Stream GenerateImageStream(string targetMime, Size pixelSize, float dpi, bool opaque, string[] sampleParams = null)        {            if (targetMime != Common.Util.MimeTypes.SVG)                throw new Exception("This sample only supports SVG output format.");
            Color background = Color.PaleGoldenrod,                line = Color.FromArgb(11, 83, 69),                arc = Color.FromArgb(22, 160, 133),                fill = Color.FromArgb(255, 171, 145),                marks = Color.DarkGray,                text = Color.Black,                textBack = Color.Cornsilk;
            var Inch = dpi;            var ms = new MemoryStream();            using var g = new GcSvgGraphics(pixelSize.Width, pixelSize.Height);            if (opaque)                g.FillRectangle(new RectangleF(0, 0, g.Width, g.Height), background);
            // Arc bounding rectangle:            var rc = new RectangleF(0, 0, Inch * 4, Inch * 4.8f);
            // Use transform to center all drawing:            var t = g.Transform;            g.Transform = Matrix3x2.CreateTranslation(g.Width / 2 - rc.Width / 2, g.Height / 2 - rc.Height / 2);
            // Draw the arc:            DrawArch(g, rc, rc.Height * 0.3f, rc.Width * 0.08f, line, arc, fill);
            // Add a label:            var tf = new TextFormat()            {                Font = GCTEXT.Font.FromFile(Path.Combine("Resources", "Fonts", "FreeSerif.ttf")),                FontSize = Inch / 6,                ForeColor = text,            };            g.DrawString("ARCH", tf, rc, TextAlignment.Center, ParagraphAlignment.Center, false);
            // Measurement lines:            var w = Inch / 8;            var pen = new GCDRAW.Pen(marks);
            var txt = $"{(rc.Width / Inch):F}\"";            var s = g.MeasureString(txt, tf);            var d = s.Height * 1.5f;            g.DrawLine(rc.Left, rc.Top - d, rc.Right, rc.Top - d, pen);            g.DrawLine(rc.Left, rc.Top - d, rc.Left + w, rc.Top - d - w, pen);            g.DrawLine(rc.Left, rc.Top - d, rc.Left + w, rc.Top - d + w, pen);            g.DrawLine(rc.Right, rc.Top - d, rc.Right - w, rc.Top - d - w, pen);            g.DrawLine(rc.Right, rc.Top - d, rc.Right - w, rc.Top - d + w, pen);
            var rcTxt = new RectangleF(rc.Left + rc.Width / 2 - s.Width / 2, rc.Top - d - s.Height / 2, s.Width, s.Height);            rcTxt.Inflate(2, 2);            g.FillRectangle(rcTxt, textBack);            g.DrawString(txt, tf, rcTxt, TextAlignment.Center, ParagraphAlignment.Center, false);
            txt = $"{(rc.Height / Inch):F}\"";            s = g.MeasureString(txt, tf);            d = s.Width;            g.DrawLine(rc.Left - d, rc.Top, rc.Left - d, rc.Bottom, pen);            g.DrawLine(rc.Left - d, rc.Top, rc.Left - d - w, rc.Top + w, pen);            g.DrawLine(rc.Left - d, rc.Top, rc.Left - d + w, rc.Top + w, pen);            g.DrawLine(rc.Left - d, rc.Bottom, rc.Left - d - w, rc.Bottom - w, pen);            g.DrawLine(rc.Left - d, rc.Bottom, rc.Left - d + w, rc.Bottom - w, pen);            rcTxt = new RectangleF(rc.Left - d - s.Width / 2, rc.Top + rc.Height / 2 - s.Height / 2, s.Width, s.Height);            rcTxt.Inflate(2, 2);            g.FillRectangle(rcTxt, textBack);            g.DrawString(txt, tf, rcTxt, TextAlignment.Center, ParagraphAlignment.Center, false);
            // Restore transform:            g.Transform = t;
            // Done:            var svg = g.ToSvgDocument();            svg.Save(ms);            ms.Seek(0, SeekOrigin.Begin);            return ms;        }
        private void DrawArch(GcGraphics g, RectangleF rc, float harc, float wd, Color line, Color arch, Color fill)        {            var path = g.CreatePath();            // Insides filler (start from bottom left, to clockwise):            path.BeginFigure(rc.Left + wd, rc.Bottom - wd);            path.AddLine(rc.Left + wd, rc.Top + harc);            path.AddArc(new ArcSegment()            {                ArcSize = ArcSize.Small,                Point = new PointF(rc.Right - wd, rc.Top + harc),                RotationAngle = 0,                Size = new SizeF(rc.Width / 2f - wd, harc - wd),                SweepDirection = SweepDirection.Clockwise            });            path.AddLine(rc.Right - wd, rc.Bottom - wd);            path.EndFigure(FigureEnd.Closed);            g.FillPath(path, fill);            path.Dispose();
            // Arc outlines (start from bottom left, to clockwise):            path = g.CreatePath();            path.BeginFigure(rc.Left, rc.Bottom);            path.AddLine(rc.Left, rc.Top + harc);            path.AddLine(rc.Left + wd, rc.Top + harc);            path.AddLine(rc.Left + wd, rc.Bottom - wd);            path.EndFigure(FigureEnd.Closed);            path.BeginFigure(rc.Left, rc.Top + harc);            path.AddArc(new ArcSegment()            {                ArcSize = ArcSize.Small,                Point = new PointF(rc.Right, rc.Top + harc),                RotationAngle = 0,                Size = new SizeF(rc.Width / 2f, harc),                SweepDirection = SweepDirection.Clockwise            });            path.AddLine(rc.Right - wd, rc.Top + harc);            path.AddArc(new ArcSegment()            {                ArcSize = ArcSize.Small,                Point = new PointF(rc.Left + wd, rc.Top + harc),                RotationAngle = 0,                Size = new SizeF(rc.Width / 2f - wd, harc - wd),                SweepDirection = SweepDirection.CounterClockwise            });            path.EndFigure(FigureEnd.Closed);            path.BeginFigure(rc.Right, rc.Top + harc);            path.AddLine(rc.Right, rc.Bottom);            path.AddLine(rc.Right - wd, rc.Bottom - wd);            path.AddLine(rc.Right - wd, rc.Top + harc);            path.EndFigure(FigureEnd.Closed);            path.BeginFigure(rc.Right, rc.Bottom);            path.AddLine(rc.Left, rc.Bottom);            path.AddLine(rc.Left + wd, rc.Bottom - wd);            path.AddLine(rc.Right - wd, rc.Bottom - wd);            path.EndFigure(FigureEnd.Closed);
            g.FillPath(path, arch);            g.DrawPath(path, new GCDRAW.Pen(line, 2));
            path.Dispose();        }    }}