.NET Cross-Platform Image Processing Framework - Printing GIFs to PDF

2023年10月17日 1842点热度 0人点赞 0条评论

内容目录

ImageMagick is a powerful image processing library that supports over 100 major file formats (excluding sub-formats). Using Magick.NET, you can use ImageMagick in C#/VB.NET/.NET Core applications without the need to install ImageMagick on the server or desktop.

Project address: https://github.com/dlemstra/Magick.NET

The reasons I recommend it are not only its cross-platform capabilities and open-source nature, but also its simple and user-friendly API. You can reference it by searching for ImageMagick on NuGet.

using ImageMagick;
using Microsoft.IO;
using PdfSharp.Drawing;
using PdfSharp.Fonts;
using PdfSharp.Pdf;
using PdfSharp.Snippets.Font;

namespace ConsoleAppTest
{
	internal class Program
	{
		private static readonly RecyclableMemoryStreamManager MemoryManager = new();
		static async Task Main()
		{
			var document = new PdfDocument();
			document.Info.Title = "标题测试";
			document.Info.Subject = "测试";

			// Insert a page
			PdfPage page = document.AddPage();
			XGraphics gfx = XGraphics.FromPdfPage(page);

			// Load gif file
			using var image = new MagickImage(File.Open("D:/a.gif", FileMode.Open));

			// Convert and store png in memory
			var memoryStream = MemoryManager.GetStream();
			image.Write(memoryStream,MagickFormat.Png);

			// Reset stream pointer to the beginning position
			memoryStream.Seek(0, SeekOrigin.Begin);
			XImage img = XImage.FromStream(memoryStream);

			// Image is drawn at the position on the page, coordinates 0,0
			gfx.DrawImage(img, new XPoint(0, 0));

			var filename = "new.pdf";
			document.Save(filename);
		}
	}