👁 Image
PdfPig.Rendering.Skia 0.1.14.2

PdfPig.Rendering.Skia

Cross-platform library to render pdf documents as images with PdfPig using SkiaSharp, or to extract images contained in a pdf page as SkiaSharp images.

Available as a Nuget package https://www.nuget.org/packages/PdfPig.Rendering.Skia/

Uses parts of PDFBox code.

How to Render pages as images

Save pages as image to disk

using UglyToad.PdfPig.Graphics.Colors;
using UglyToad.PdfPig;
using UglyToad.PdfPig.Rendering.Skia;
using SkiaSharp;

[...]

using (var document = PdfDocument.Open(_path, SkiaRenderingParsingOptions.Instance))
{
	string fileName = Path.GetFileName(_path);

	document.AddSkiaPageFactory(); // Same as document.AddPageFactory<SKPicture, SkiaPageFactory>() and document.AddPageFactory<PdfPageSize, PageSizeFactory>()

	for (int p = 1; p <= document.NumberOfPages; p++)
	{
		using (var fs = new FileStream($"{fileName}_{p}.png", FileMode.Create))
		using (var ms = document.GetPageAsPng(p, _scale, RGBColor.White))
		{
			ms.WriteTo(fs);
		}
	}
}

Get the SKBitmap from a page

using UglyToad.PdfPig.Graphics.Colors;
using UglyToad.PdfPig;
using UglyToad.PdfPig.Rendering.Skia;
using SkiaSharp;

[...]

using (var document = PdfDocument.Open(_path, SkiaRenderingParsingOptions.Instance))
{
	document.AddSkiaPageFactory(); // Same as document.AddPageFactory<SKPicture, SkiaPageFactory>() and document.AddPageFactory<PdfPageSize, PageSizeFactory>()

	for (int p = 1; p <= document.NumberOfPages; p++)
	{
		using var skBitmap = document.GetPageAsSKBitmap(p, _scale, RGBColor.White);
		// Use the SKBitmap
	}
}

Get the SKPicture from a page

Starting from version 0.1.14.1, the SKPicture.CullRect cannot be used anymore to get the page size.

using UglyToad.PdfPig.Graphics.Colors;
using UglyToad.PdfPig;
using UglyToad.PdfPig.Rendering.Skia;
using SkiaSharp;

[...]

using (var document = PdfDocument.Open(_path, SkiaRenderingParsingOptions.Instance))
{
	document.AddSkiaPageFactory(); // Same as document.AddPageFactory<SKPicture, SkiaPageFactory>() and document.AddPageFactory<PdfPageSize, PageSizeFactory>()

	for (int p = 1; p <= document.NumberOfPages; p++)
	{
		using var skPicture = document.GetPage<SKPicture>(p);
		// Use the SKPicture
	}
}

How to extract images contained in a pdf page

using UglyToad.PdfPig.Rendering.Skia.Helpers;

[...]

using (var document = PdfDocument.Open(_path, SkiaRenderingParsingOptions.Instance))
{
	for (int p = 1; p <= document.NumberOfPages; p++)
	{
		var page = document.GetPage(p);
		foreach (var pdfImage in page.GetImages())
		{
			using var skBitmap = pdfImage.GetSKBitmap();			
			// Use SKBitmap

			// In order to get the SKImage, use the following:
			using var skImage = SKImage.FromBitmap(skBitmap);
			// Use SKImage
		}
	}
}