//// This code is part of Document Solutions for PDF .NET demos.// Copyright (c) MESCIUS inc. All rights reserved.//using System;using System.IO;using System.Drawing;using System.Numerics;using GrapeCity.Documents.Pdf;using GrapeCity.Documents.Text;
namespace DsPdfWeb.Demos.Basics{    // Shows how to use GcPdfGraphics.Transform to rotate a text string    // (alternative way using matrix multiplication).    // See also RotatedText.    public class RotatedText2    {        public int CreatePDF(Stream stream)        {            // Rotation angle, degrees clockwise:            float angle = -45;            //            var doc = new GcPdfDocument();            var g = doc.NewPage().Graphics;            // Create a text layout, pick a font and font size:            TextLayout tl = g.CreateTextLayout();            tl.DefaultFormat.Font = StandardFonts.Times;            tl.DefaultFormat.FontSize = 24;            // Add a text, and perform layout:            tl.Append("Rotated text.");            tl.PerformLayout(true);            // Text insertion point at (1",1"):            var ip = new PointF(72, 72);            // Now that we have text size, create text rectangle with top left at insertion point:            var rect = new RectangleF(ip.X, ip.Y, tl.ContentWidth, tl.ContentHeight);            // Rotation center point in the middel of text bounding rectangle:            var center = new PointF(ip.X + tl.ContentWidth / 2, ip.Y + tl.ContentHeight / 2);            // Transformations can be combined by multiplying matrices.            // Note that matrix multiplication is not commutative -             // the sequence of operands is important, and is applied from last to first            // matrices being multiplied:            // 3) Translate the origin back to (0,0):            // 2) Rotate around new origin by the specified angle:            // 1) Translate the origin from default (0,0) to rotation center:            g.Transform =                Matrix3x2.CreateTranslation(-center.X, -center.Y) *                Matrix3x2.CreateRotation((float)(angle * Math.PI) / 180f) *                Matrix3x2.CreateTranslation(center.X, center.Y);            // Draw rotated text and bounding rectangle:            g.DrawTextLayout(tl, ip);            g.DrawRectangle(rect, Color.Black, 1);            // Remove transformation and draw the bounding rectangle where the non-rotated text would have been:            g.Transform = Matrix3x2.Identity;            g.DrawRectangle(rect, Color.ForestGreen, 1);            // Done:            doc.Save(stream);            return doc.Pages.Count;        }    }}