PdfiumViewer组件扩展(Pdfium.Net.Free)--添加图片

合集 - PdfiumViewer组件扩展(Pdfium.Net.Free)(16)

1.PdfiumViewer组件扩展(Pdfium.Net.Free)--概述2024-01-042.PdfiumViewer组件扩展(Pdfium.Net.Free)--快速入门2024-01-253.PdfiumViewer组件扩展(Pdfium.Net.Free)--PDF预览器框选2024-01-254.PdfiumViewer组件扩展(Pdfium.Net.Free)--打开大文件处理2024-01-255.PdfiumViewer组件扩展(Pdfium.Net.Free)--加载字体2024-01-296.PdfiumViewer组件扩展(Pdfium.Net.Free)--创建字符子集2024-01-297.PdfiumViewer组件扩展(Pdfium.Net.Free)--添加文本2024-01-29

8.PdfiumViewer组件扩展(Pdfium.Net.Free)--添加图片2024-01-30

9.PdfiumViewer组件扩展(Pdfium.Net.Free)--添加水印2024-02-0210.PdfiumViewer组件扩展(Pdfium.Net.Free)--删除或编辑pdf内容2024-01-3111.PdfiumViewer组件扩展(Pdfium.Net.Free)--PDF操作2024-02-0212.PdfiumViewer组件扩展(Pdfium.Net.Free)--签名2024-01-3113.PdfiumViewer组件扩展(Pdfium.Net.Free)--注解2024-01-3114.PdfiumViewer组件扩展(Pdfium.Net.Free)--可视化编辑pdf2024-04-0715.什么是转换矩阵以及如何使用它2024-02-2416.Pdfium.Net.Free 添加 bblanchon.PDFium nuget方式02-11

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项目地址：

Pdfium.Net：https://github.com/1000374/Pdfium.Net.Free

PdfiumViewer：https://github.com/1000374/PdfiumViewer

Pdfium.Net.Free 支持

• .NETFramework 4.0

• .NETFramework 4.5

• .NETStandard 2.0

• .Net8.0

可以和PdfiumViewer.Free共同使用预览、编辑pdf，也可以直接引用Pdfium.Net.Free 操作pdf，Pdfium.Net.Free封装了现有Pdfium的函数，实现了部分操作pdf的功能，部分功能等待后续~~

Pdfium添加图片有三个重载，根据入参可对添加的图片进行缩放、旋转、裁切

1.添加图片路径到pdf

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/// <summary> /// add Image  /// </summary> /// <param name="imagePath">image file</param> /// <param name="posX">x</param> /// <param name="posY">y</param> /// <param name="scalex">scale x</param> /// <param name="scaley">scale y</param> /// <param name="rotate">rotate</param> /// <param name="shear">shear</param> /// <returns></returns> public bool AddImage(string imagePath, float posX, float posY, float scalex = 1f, float scaley = 1, float rotate = 0, float shear = 0)

　

代码示例：

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using (var doc = PdfDocument.CreateNew()) {     var imagePath = "./Pdfium.NetTests/resources/mona_lisa.jpg";     var page = doc.Pages.Add(612, 792);     page.AddImage(imagePath, 50, 100);     doc.Save("./Pdfium.NetTests/AddImage.pdf"); }

　　

2.添加流到pdf

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/// <summary> /// add Image  /// </summary> /// <param name="stream">new MemoryStream(File.ReadAllBytes(imagePath));</param> /// <param name="posX">x</param> /// <param name="posY">y</param> /// <param name="scalex">scale x</param> /// <param name="scaley">scale y</param> /// <param name="rotate">rotate</param> /// <param name="shear">shear</param> /// <returns></returns> public bool AddImage(Stream stream, float posX, float posY, float scalex = 1f, float scaley = 1, float rotate = 0, float shear = 0)

　　

示例代码：

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using (var doc = PdfDocument.CreateNew()) {     var imagePath = "./Pdfium.NetTests/resources/mona_lisa.jpg";     var page = doc.Pages.Add(612, 792);     var stream = new MemoryStream(File.ReadAllBytes(imagePath));     page.AddImage(stream, 50, 100);     doc.Save("./Pdfium.NetTests/AddImage.pdf"); }

　　

3.添加image 到pdf

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/// <summary> /// add Image  /// </summary> /// <param name="image">Image</param> /// <param name="posX">x</param> /// <param name="posY">y</param> /// <param name="scalex">scale x</param> /// <param name="scaley">scale y</param> /// <param name="rotate">rotate</param> /// <param name="shear">shear</param> /// <returns></returns> public bool AddImage(Image image, float posX, float posY, float scalex = 1f, float scaley = 1, float rotate = 0, float shear = 0)

　　

代码示例：

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using (var doc = PdfDocument.CreateNew()) {     var imagePath = "./Pdfium.NetTests/resources/mona_lisa.jpg";     var image = Image.FromFile(imagePath, true);     var page = doc.Pages.Add(612, 792);     page.AddImage(image, 50, 100);     doc.Save("./Pdfium.NetTests/AddImage1.pdf"); }