The following example shows how to position and apply various transformations, such as rotation and scaling, to an image drawn on a PDF page.
Complete code
using System;
using SautinSoft.Pdf;
using System.IO;
using SautinSoft.Pdf.Content;
class Program
{
/// <summary>
/// Export and import images to PDF file.
/// </summary>
/// <remarks>
/// Details: https://sautinsoft.com/products/pdf/help/net/developer-guide/image-positioning-and-transformations.php
/// </remarks>
static void Main()
{
// Before starting this example, please get a free 30-day trial key:
// https://sautinsoft.com/start-for-free/
// Apply the key here:
// PdfDocument.SetLicense("...");
using (var document = new PdfDocument())
{
var page = document.Pages.Add();
// Load the image from a file.
var image = PdfImage.Load(@"..\..\..\submit.png");
double margin = 50;
// Set the location of the first image in the top-left corner of the page (with a specified margin).
double x = margin;
double y = page.CropBox.Top - margin - image.Size.Height;
// Draw the first image.
page.Content.DrawImage(image, new PdfPoint(x, y));
// Set the location of the second image in the top-right corner of the page (with the same margin).
x = page.CropBox.Right - margin - image.Size.Width;
y = page.CropBox.Top - margin - image.Size.Height;
// Initialize the transformation.
var transform = PdfMatrix.Identity;
// Use the translate operation to position the image.
transform.Translate(x, y);
// Use the scale operation to resize the image.
// NOTE: The unit square of user space, bounded by user coordinates (0, 0) and (1, 1),
// corresponds to the boundary of the image in the image space.
transform.Scale(image.Size.Width, image.Size.Height);
// Use the scale operation to flip the image horizontally.
transform.Scale(-1, 1, 0.5, 0);
// Draw the second image.
page.Content.DrawImage(image, transform);
// Set the location of the third image in the bottom-left corner of the page (with the same margin).
x = margin;
y = margin;
// Initialize the transformation.
transform = PdfMatrix.Identity;
// Use the translate operation to position the image.
transform.Translate(x, y);
// Use the scale operation to resize the image.
transform.Scale(image.Size.Width, image.Size.Height);
// Use the scale operation to flip the image vertically.
transform.Scale(1, -1, 0, 0.5);
// Draw the third image.
page.Content.DrawImage(image, transform);
// Set the location of the fourth image in the bottom-right corner of the page (with the same margin).
x = page.CropBox.Right - margin - image.Size.Width;
y = margin;
// Initialize the transformation.
transform = PdfMatrix.Identity;
// Use the translate operation to position the image.
transform.Translate(x, y);
// Use the scale operation to resize the image.
transform.Scale(image.Size.Width, image.Size.Height);
// Use the scale operation to flip the image horizontally and vertically.
transform.Scale(-1, -1, 0.5, 0.5);
// Draw the fourth image.
page.Content.DrawImage(image, transform);
document.Save("PositioningTransformations.pdf");
}
System.Diagnostics.Process.Start(new System.Diagnostics.ProcessStartInfo("PositioningTransformations.pdf") { UseShellExecute = true });
}
}
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