//// This code is part of Document Solutions for Imaging demos.// Copyright (c) MESCIUS inc. All rights reserved.//using System.IO;using System.Drawing;using GrapeCity.Documents.Text;using GrapeCity.Documents.Imaging;using GCTEXT = GrapeCity.Documents.Text;
namespace DsImagingWeb.Demos{    // This sample shows how to draw multi-column text on a GcBitmap.    public class TextColumns    {        public GcBitmap GenerateImage(Size pixelSize, float dpi, bool opaque, string[] sampleParams = null)        {            var bmp = new GcBitmap(pixelSize.Width, pixelSize.Height, true, dpi, dpi);            using (var g = bmp.CreateGraphics(Color.White))            {                g.Renderer.Multithreaded = true;                g.Renderer.SlowAntialiasing = true;
                var tl = g.CreateTextLayout();                tl.DefaultFormat.Font = GCTEXT.Font.FromFile(Path.Combine("Resources", "Fonts", "NotoSerif-Regular.ttf"));
                tl.DefaultFormat.FontSize = 12;                tl.TextAlignment = TextAlignment.Justified;                tl.FirstLineIndent = 96 / 2;                tl.ParagraphSpacing = 96 / 8;
                // Add some text (note that TextLayout interprets "\r\n", "\r" and "\n" as paragraph delimiters):                tl.Append(Common.Util.LoremIpsum(20));                // Set up columns:                const int colCount = 3;                const float margin = 96 / 2; // 1/2" margins all around                const float colGap = margin / 2; // 1/4" gap between columns                float colWidth = (bmp.Width - margin * 2 - colGap * (colCount - 1)) / colCount;                tl.MaxWidth = colWidth;                tl.MaxHeight = bmp.Height - margin * 2;                // Calculate glyphs and perform layout for the whole text:                tl.PerformLayout(true);
                // In a loop, split and render the text in the current column:                int col = 0;                while (true)                {                    // The TextLayout that will hold the rest of the text which did not fit in the current layout:                    var tso = new TextSplitOptions(tl)                    {                        MinLinesInLastParagraph = 2,                        MinLinesInFirstParagraph = 2                    };                    var splitResult = tl.Split(tso, out TextLayout rest);                    g.DrawTextLayout(tl, new PointF(margin + col * (colWidth + colGap), margin));                    if (splitResult != SplitResult.Split)                        break;                    tl = rest;                    if (++col == colCount)                        break;                }            }            return bmp;        }    }}