//// This code is part of Document Solutions for PDF .NET demos.// Copyright (c) MESCIUS inc. All rights reserved.//using System.Collections.Generic;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{    // This sample demonstrates how to create a drop cap in DsPdf.    public class DropCap    {        public int CreatePDF(Stream stream)        {            var doc = new GcPdfDocument();            var g = doc.NewPage().Graphics;            // Get some text and split it into first letter (drop cap) and the rest:            var text = Common.Util.LoremIpsum(1);            var head = text.Substring(0, 1);            var tail = text.Substring(1);            // Use the Times font:            var font = GCTEXT.Font.FromFile(Path.Combine("Resources", "Fonts", "NotoSerif-Regular.ttf"));            // Text layout for the drop cap:            var tlHead = g.CreateTextLayout();            tlHead.DefaultFormat.Font = font;            tlHead.DefaultFormat.FontSize = 40;            tlHead.Append(head);            tlHead.PerformLayout(true);            // Text layout for the rest of the text:            var tlTail = g.CreateTextLayout();            tlTail.DefaultFormat.Font = font;            tlTail.DefaultFormat.FontSize = 12;            // Use whole page with 1" margins all around:            tlTail.MaxWidth = doc.Pages.Last.Size.Width - 72 * 2;            tlTail.MaxHeight = doc.Pages.Last.Size.Height - 72 * 2;            tlTail.Append(tail);            // Before we layout the main body of the text, we calculate the size and position            // of the drop cap rectangle, and add it to the main text layout's ObjectRects -            // the list of rectangles that the main text will flow around.            //            // Note: While we could simply position the drop cap rectangle at the top/left of the             // main text, it looks better if the tops of the drop cap and the main text's glyphs            // are aligned. For this, we need to calculate the offsets of letter tops within            // the text bounding boxes, and adjust the position of the drop cap accordingly            // (raise it a little).            // (For this adjustment we need the sCapHeight field which is present if the font's            // os/2 table version 2 and higher, so we must test for that and skip this step if            // the CapHeight is not available).            float dy = 0;            if (font.CapHeight != -1)            {                // We move the drop cap position up by the amount equal to the difference between the                // top spacing within the Em square of the drop cap's font size and the font size of the rest of the text:                float k = tlHead.DefaultFormat.FontSize * tlHead.Resolution * tlHead.FontScaleFactor / (font.UnitsPerEm * 72);                dy = (font.HorizontalAscender - font.CapHeight) * k;                k /= tlHead.DefaultFormat.FontSize;                k *= tlTail.DefaultFormat.FontSize;                dy -= (font.HorizontalAscender - font.SmallXHeight) * k;            }            // Specify the rectangle for the main text to flow around:            tlTail.ObjectRects = new List<ObjectRect>() { new ObjectRect(0, -dy, tlHead.ContentWidth * 1.2f, tlHead.ContentHeight) };            // Layout the main text now:            tlTail.PerformLayout(true);            // Draw everything:            g.DrawTextLayout(tlHead, new PointF(72, 72 - dy));            g.DrawTextLayout(tlTail, new PointF(72, 72));            // Done:            doc.Save(stream);            return doc.Pages.Count;        }    }}