//// 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 GrapeCity.Documents.Pdf;using GrapeCity.Documents.Pdf.Annotations;
namespace DsPdfWeb.Demos{    // This sample shows how to use the Page.AdjustCoordinates() method    // to convert visual coordinates (measured from the top left corner    // of the page according to DsPdf rules) to correct coordinates in a PDF    // that was loaded into GcPdfDocument and may have arbitrary unknown    // transformations applied to its pages. The adjusted coordinates can be    // used to position annotations (redact in this case) etc.    //    // The PDF used in this sample has one page containing the scan of a sample invoice    // that was rotated 90 degrees clockwise. The PDF page is rotated 270 degrees to    // compensate (so that visually the page has correct portrait orientation).    public class AdjustCoords    {        public int CreatePDF(Stream stream)        {            var doc = new GcPdfDocument();            using var fs = File.OpenRead(Path.Combine("Resources", "PDFs", "invoice-scan-rot270.pdf"));            doc.Load(fs);
            if (doc.Pages.Count != 1)                throw new Exception("Unexpected: sample invoice should have exactly one page.");
            var page = doc.Pages[0];
            // The bounding rectangle of the area to redact,            // measured from the top left corner of the PDF page.            // If this rectangle is used as is, it will miss the target content:            var rectToRedact = new RectangleF(20, 170, 200, 40);
            // The adjusted bounding rectangle, taking into consideration            // any possible page transformations (rotation in this case):            var adjusted = page.AdjustCoordinates(rectToRedact);
            // Note: if 'rectToRedact' is used instead of 'adjusted',            // the redact will miss the target (customer name/address):            var redact = new RedactAnnotation()            {                Page = page,                Rect = adjusted,                OverlayFillColor = Color.Orange,                OverlayText = "Redacted",            };            // Apply the redact:            doc.Redact(redact);
            // Done:            doc.Save(stream);            return doc.Pages.Count;        }    }}