//// This code is part of Document Solutions for PDF .NET demos.// Copyright (c) MESCIUS inc. All rights reserved.//using System.IO;using System.Drawing;using GrapeCity.Documents.Pdf;using GrapeCity.Documents.Text;using GCTEXT = GrapeCity.Documents.Text;using GCDRAW = GrapeCity.Documents.Drawing;
namespace DsPdfWeb.Demos.Basics{    // Shows how to render private use Unicode characters (PUA) with custom EUDC fonts (.tte).    public class EUDC    {        public int CreatePDF(Stream stream)        {            // Test string using EUDC codes and two regular chars (& and !): 0xE620 0xE621 0xE622 0xE624 & 0xE623 !            const string tstr = "&!";            // Set up:            var doc = new GcPdfDocument();            var page = doc.NewPage();            var g = page.Graphics;            var tf = new TextFormat() { FontSize = 20 };            var rc = Common.Util.AddNote(                "This sample demonstrates how to render private use Unicode characters (PUA) with custom EUDC fonts (.tte).\n" +                "A GrapeCity.Documents.Text.Font can be created from an EUDC .tte file, " +                "and linked to one or more fonts using Font.AddEudcFont() method.",                page);            const float dy = 36;            var ip = new PointF(rc.X, rc.Bottom + dy / 2);
            // Use FontCollection to allow fetching fonts by family names:            var fc = new FontCollection();
            // Assign the font collection to the graphics so that MeasureString/DrawString            // methods on the graphics can find fallback fonts:            g.FontCollection = fc;
            // Register some regular fonts with the FontCollection:            fc.RegisterFont(Path.Combine("Resources", "Fonts", "NotoSerif-Regular.ttf"));            fc.RegisterFont(Path.Combine("Resources", "Fonts", "NotoSans-Regular.ttf"));            fc.RegisterFont(Path.Combine("Resources", "Fonts", "NotoSerifSC-Regular.ttf"));            fc.RegisterFont(Path.Combine("Resources", "Fonts", "NotoSans-Light.ttf"));            fc.RegisterFont(Path.Combine("Resources", "Fonts", "NotoSans-Condensed.ttf"));
            // Tell the font collection to use Noto Serif as a fallback:            fc.AppendFallbackFonts(fc.FindFamilyName("Noto Serif"));
            // Using Noto Sans font renders the test string as empty rectangles, as suitable glyphs are not present in Noto Sans:            tf.Font = fc.FindFamilyName("Noto Sans", false, false);            g.DrawString($"Noto Sans: {tstr} (no EUDC font has been linked yet)", tf, ip);            ip.Y += dy;
            // Load two custom EUDC fonts:            var eudcF0 = GCTEXT.Font.FromFile(Path.Combine("Resources", "Fonts", "Eudc0.tte"));            var eudcF1 = GCTEXT.Font.FromFile(Path.Combine("Resources", "Fonts", "Eudc1.tte"));
            // Link one EUDC font to Noto Sans - now in strings rendered with Noto Sans, EUDC chars will be looked up in this font:            var font = fc.FindFamilyName("Noto Sans");            font.AddEudcFont(eudcF0);            // Ditto for Noto Serif font:            font = fc.FindFamilyName("Noto Serif");            font.AddEudcFont(eudcF0);            // Link another EUDC font to Noto Sans Light:            font = fc.FindFamilyName("Noto Sans Light");            font.AddEudcFont(eudcF1);
            // Render strings with EUDC chars using fonts to which our custom EUDC font is linked:            tf.Font = fc.FindFamilyName("Noto Sans", false, false);            g.DrawString($"Noto Sans, linked with Eudc0.tte: {tstr}", tf, ip);            ip.Y += dy;            tf.Font = fc.FindFileName("NotoSerif-Regular.ttf");            g.DrawString($"Noto Sans, fallback via Noto Serif: {tstr}", tf, ip);            ip.Y += dy;            tf.Font = fc.FindFamilyName("Noto Sans Condensed");            g.DrawString($"Noto Sans Condensed, fallback via Noto Serif: {tstr}", tf, ip);            ip.Y += dy;            tf.Font = fc.FindFamilyName("Noto Sans Light");            g.DrawString($"Noto Sans Light, linked with Eudc1.tte: {tstr}", tf, ip);            ip.Y += dy;
            // FontCollection adds some services (like font lookup by family name),            // but EUDC fonts can be linked to fonts that are not in a collection:            font = GCTEXT.Font.FromFile(Path.Combine("Resources", "Fonts", "VLADIMIR.TTF"));            font.AddEudcFont(eudcF0);            tf.Font = font;            g.DrawString($"VLADIMIR Font, linked with Eudc0.tte: {tstr}", tf, ip);            ip.Y += dy;            // Done:            doc.Save(stream);            return doc.Pages.Count;        }    }}