//// 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.Svg;using GrapeCity.Documents.Text;using GrapeCity.Documents.Drawing;using GCTEXT = GrapeCity.Documents.Text;
namespace DsImagingWeb.Demos{    // This sample demonstrates drawing text on an SVG using GcSvgGraphics.    // It shows how to render text as true SVG <text> elements (rather than paths),    // so that the text remains searchable, selectable, and copyable.    // The demo draws rounded rectangles in two ways: using the dedicated    // DrawRoundRect/FillRoundRect methods, and by constructing a custom    // graphics path. Labels are added inside the shapes using DrawString,    // and the result is saved as an SVG document.    // See also RoundRectangle and SvgGraphicsRoundRectangle samples.    public class SvgGraphicsText    {        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.");
            var Inch = dpi;            var ms = new MemoryStream();            using var g = new GcSvgGraphics(pixelSize.Width, pixelSize.Height);
            // IMPORTANT: this property is true by default on GcSvgGraphics, which usually yields better text fidelity,            // but text cannot be searched/selected/copied in this case, and the SVG file size is larger.            // Setting this property to false results in text rendered using SVG 'text' elements, so that            // text can be searched/selected/copied. Compare to the SvgGraphicsRoundRectangle example            // which is identical to this example but draws text as paths:            g.DrawTextAsPath = false;
            if (opaque)                g.FillRectangle(new RectangleF(0, 0, g.Width, g.Height), Color.White);
            var rc = Common.Util.AddNote(                "GcGraphics has dedicated methods to easily draw and fill rectangles with rounded corners. " +                "This sample also shows how the same result may be achieved using graphics paths. " +                "While they are not really needed for drawing round rectangles, graphics paths allow " +                "to draw and fill arbitrary figures with complex geometries.\r\n\r\n" +                "Note that this version of the \"Round Rectangles\" sample draws on a GcSvgGraphics, " +                "and produces a vector SVG image rather than a raster image (JPEG, PNG etc.).",                g);
            // Rounded rectangle's radii:            float rx = 36, ry = 24;
            // Using dedicated methods to draw and fill round rectangles:            var rEasy = new RectangleF(rc.Left, rc.Bottom + Inch / 2, Inch * 2, Inch);            g.FillRoundRect(rEasy, rx, ry, Color.PaleGreen);            g.DrawRoundRect(rEasy, rx, ry, Color.Blue, 4);            // Add a label:            var tf = new TextFormat()            {                Font = GCTEXT.Font.FromFile(Path.Combine("Resources", "Fonts", "FreeSerif.ttf")),                FontSize = Inch / 6            };            g.DrawString("The easy way.", tf, rEasy, TextAlignment.Center, ParagraphAlignment.Center, false);
            // Using graphics path to achieve the same result:            var rHard = rEasy;            rHard.Offset(0, rEasy.Height + Inch / 2);            var path = MakeRoundRect(g, rHard, rx, ry);            g.FillPath(path, Color.PaleVioletRed);            g.DrawPath(path, Color.Purple, 4);            // Add a label:            g.DrawString("The hard way.", tf, rHard, TextAlignment.Center, ParagraphAlignment.Center, false);
            // Done:            var svg = g.ToSvgDocument();            svg.Save(ms);            ms.Seek(0, SeekOrigin.Begin);            return ms;        }
        // This method shows how to create a graphics path that may be used        // to fill or draw arbitrary shapes on a GcGraphics.        private IPath MakeRoundRect(GcGraphics g, RectangleF rc, float rx, float ry)        {            var path = g.CreatePath();            var sz = new SizeF(rx, ry);            // start from horizontal top left            path.BeginFigure(new PointF(rc.Left + rx, rc.Top));            path.AddLine(new PointF(rc.Right - rx, rc.Top));            path.AddArc(new ArcSegment() { Point = new PointF(rc.Right, rc.Top + ry), SweepDirection = SweepDirection.Clockwise, Size = sz });            path.AddLine(new PointF(rc.Right, rc.Bottom - ry));            path.AddArc(new ArcSegment() { Point = new PointF(rc.Right - rx, rc.Bottom), SweepDirection = SweepDirection.Clockwise, Size = sz });            path.AddLine(new PointF(rc.Left + rx, rc.Bottom));            path.AddArc(new ArcSegment() { Point = new PointF(rc.Left, rc.Bottom - ry), SweepDirection = SweepDirection.Clockwise, Size = sz });            path.AddLine(new PointF(rc.Left, rc.Top + ry));            path.AddArc(new ArcSegment() { Point = new PointF(rc.Left + rx, rc.Top), SweepDirection = SweepDirection.Clockwise, Size = sz });            path.EndFigure(FigureEnd.Closed);            return path;        }    }}