// 完毕:
using System;
using System.IO;
using System.Linq;
using System.Drawing;
using System.Collections.Generic;
using GrapeCity.Documents.Pdf;
using GrapeCity.Documents.Svg;
using GrapeCity.Documents.Drawing;
using GrapeCity.Documents.Text;
namespace DsPdfWeb.Demos.Basics
{
// This sample shows how to use the SaveAsSvg() method to save a PDF
// page as SVG (scalable vector graphics) image, and how to load
// and render that image on a new PDF page.
// The PDF used as the source was generated by the SvgSpecArt sample,
// but any valid PDF can be used instead.
public class SaveAsSvg
{
public int CreatePDF(Stream stream)
{
var doc = new GcPdfDocument();
var page = doc.NewPage();
var rc = Common.Util.AddNote(
"We load an existing PDF into a temporary GcPdfDocument, " +
"save its first page as an SVG image to a stream, and then " +
"draw that image on the page of the resulting PDF.",
page);
// Load a one page document into a temp PDF:
using var fs = File.OpenRead(Path.Combine("Resources", "PDFs", "svg-spec-art.pdf"));
var docSrc = new GcPdfDocument();
docSrc.Load(fs);
// Save the first page of the loaded PDF as SVG:
using var svgStream = new MemoryStream();
docSrc.Pages[0].SaveAsSvg(svgStream, new SaveAsImageOptions() { BackColor = Color.Transparent });
// PDF pages can also be saved as SVGZ (compressed SVG) using the ToSvgz() method:
// docSrc.Pages[0].ToSvgz();
svgStream.Position = 0;
// Create a GcSvgDocument from the saved SVG so that we can draw it in the resulting PDF:
using var svgDoc = GcSvgDocument.FromStream(svgStream);
// For illustration purposes we render the SVG with transparent background
// on a rectangle with a custom fill and border:
rc = new RectangleF(0, rc.Bottom, page.Size.Width, page.Size.Height - rc.Bottom);
rc.Inflate(-4f, -4f);
page.Graphics.DrawRectangle(rc, Color.DarkGoldenrod);
page.Graphics.FillRectangle(rc, Color.PaleGoldenrod);
page.Graphics.DrawSvg(svgDoc, rc);
// 完毕:
doc.Save(stream);
return doc.Pages.Count;
}
}
}