arklumpus
commented
1 year ago Hi! Thank you for your interest in VectSharp!
I will start by saying that your approach seems to be overly complicated to me - if you're using VectSharp, you don't need to have a template SVG file, and you can easily draw everything directly in C# (at least, it will be easier than getting the SVG to be parsed correctly).
For example:
using VectSharp;
using VectSharp.PDF;
using VectSharp.Raster;
// Create a SimpleFontLibrary and add the Arial fonts to it.
// I would strongly recommend using Helvetica or shipping your
// own font files instead of relying on system fonts, though!
SimpleFontLibrary fontLibrary = new SimpleFontLibrary();
fontLibrary.Add(@"C:\\Windows\\Fonts\\arialbd.ttf");
fontLibrary.Add(@"C:\\Windows\\Fonts\\arialbi.ttf");
fontLibrary.Add(@"C:\\Windows\\Fonts\\arial.ttf");
FontFamily.DefaultFontLibrary = fontLibrary;
// Create the fonts.
Font arialRegular = new Font(FontFamily.ResolveFontFamily("Arial"), 20);
Font arialBold = new Font(FontFamily.ResolveFontFamily("Arial Bold"), 20);
Font arialBoldItalic = new Font(FontFamily.ResolveFontFamily("Arial Bold Italic"), 20);
// Strings that will be drawn on the page.
string stringBold = "Arial bold text";
string stringBoldItalic = "Arial Italic bold text";
string stringRegularClipped = "Arial regular text with clipping path and overflow";
// Raster image.
RasterImageFile image = new RasterImageFile(@"icon.png");
// Page size in dots - note the conversion factor.
double pageWidth = 210 * 72 / 25.4;
double pageHeight = 297 * 72 / 25.4;
// Create the Page.
Page pag = new Page(pageWidth, pageHeight);
// Obtain the Graphics object on which to draw.
Graphics gpr = pag.Graphics;
// Draw the right-aligned text. Use the TextBaseline.Baseline to make sure that
// the strings drawn on the same line are properly aligned vertically.
gpr.FillText(260 - arialBold.MeasureText(stringBold).Width, 120, stringBold, arialBold, Colours.Black, TextBaselines.Baseline);
// Draw the "/".
gpr.FillText(270 - arialRegular.MeasureText("/").Width * 0.5, 120, "/", arialRegular, Colours.Black, TextBaselines.Baseline);
// Draw the left-aligned bold italic text.
gpr.FillText(280, 120, stringBoldItalic, arialBoldItalic, Colours.Black, TextBaselines.Baseline);
// Save the graphics state (need this to revert the clipping path).
gpr.Save();
// Set the clipping path.
gpr.SetClippingPath(125, 145, 305, 30);
// Draw the clipped text.
gpr.FillText(125, 150, stringRegularClipped, arialRegular, Colours.Black);
// Restore the graphics state (thereby removing the clipping path).
gpr.Restore();
// Draw the raster image.
gpr.DrawRasterImage(pageWidth * 0.5 - 175, pageHeight * 0.5 - 175, 350, 350, image);
// Create the document.
Document doc = new Document();
// Add the page to the document.
doc.Pages.Add(pag);
// Save the PDF (no need to specify compressStreams: true, it is the default).
doc.SaveAsPDF("poc.pdf");That said, regarding the issues you see when parsing the SVG file:
- To load the raster image, you need to follow the instructions at the bottom of this page. In particular, you need to
- Add a reference to VectSharp.MuPDFUtils or VectSharp.ImageSharpUtils;
- Add this line somewhere before loading the SVG document:
VectSharp.SVG.Parser.ParseImageURI = VectSharp.MuPDFUtils.ImageURIParser.Parser(VectSharp.SVG.Parser.ParseSVGURI);(replace
MuPDFUtilswithImageSharpUtils, if necessary).
- The bold text has the
font-weight: boldattribute set only in the outertextelement, and not in thetspan. Adding this attribute to thetspanmakes the font bold (though still not Arial, see below). - The clipping path is specified as a
rectand not as apath. Specifying it as apathmakes it work. -
For the page size, you're indeed missing a conversion. The SVG object is parsed into a page that with size 210x297 dots. For a PDF document, each dot is 1/72nd of an inch. Therefore, to get a PDF page that with size 210x297 mm, you need to scale everything by a factor of
72 / 25.4 ≈ 2.8346[ (dots / inch) / (mm / inch) = dots / mm]:var vectSharpPage = Parser.FromStream(svgDocMs); double scalingFactor = 72 / 25.4; Page scaledPage = new Page(vectSharpPage.Width * scalingFactor, vectSharpPage.Height * scalingFactor); scaledPage.Graphics.Scale(scalingFactor, scalingFactor); scaledPage.Graphics.DrawGraphics(0, 0, vectSharpPage.Graphics); VSPdf.Pages.Add(scaledPage); - For the fonts, you are not embedding the fonts in the SVG document, therefore VectSharp does not recognise them. Inkscape does not like embedded fonts, however... Still, Helvetica and Arial should have the same metrics, so it shouldn't matter too much.
- In any case, text alignments are not supported, so if you were to change the text of the bit that is right-aligned, it would not be positioned correctly.
Note that the SVG parsing functions of VectSharp.SVG are mainly intended to deal with SVG files produced by VectSharp itself... The SVG standard is huge (not even Inkscape implements everything)!
I am attaching:
- The modified SVG to solve 2 and 3 [you have to download it to view it correctly]
-
The modified C# code to create the PDF:
// Set up the raster image parser VectSharp.SVG.Parser.ParseImageURI = VectSharp.MuPDFUtils.ImageURIParser.Parser(VectSharp.SVG.Parser.ParseSVGURI); var svgDoc = XDocument.Load("POC.svg"); svgDoc.Root!.Elements().Elements() .Where(x => x.Attribute("id")!.Value.ToString() == "ArialRegularSpan") .FirstOrDefault()!.SetValue("Arial regular text with clipping path and overflow"); var svgDocMs = new MemoryStream(); var VSPdf = new Document(); svgDoc.Save(svgDocMs, SaveOptions.DisableFormatting); svgDocMs.Position = 0; // Parse the SVG file var vectSharpPage = Parser.FromStream(svgDocMs); // Scaling factor from mm to dots double scalingFactor = 72 / 25.4; // Scale the page Page scaledPage = new Page(vectSharpPage.Width * scalingFactor, vectSharpPage.Height * scalingFactor); scaledPage.Graphics.Scale(scalingFactor, scalingFactor); scaledPage.Graphics.DrawGraphics(0, 0, vectSharpPage.Graphics); // Add the scaled page to the document VSPdf.Pages.Add(scaledPage); VSPdf.SaveAsPDF("vectSharpPOC.pdf", compressStreams: true); - The
vectSharpPOC.pdffile that is produced
johnHastings772
Greetings!
First of all congratulations and thanks for having such an amazing project I wish I had discovered if before.
I'm using an SVG file as a template for some documents, I've been using iText but I'm considering moving over to VectSharp.
Unfortunately I've detected some problems with the file I'm trying to convert to PDF.
The workflow I use is:
1) Load the SVG as xml and edit nodes as needed 2) Load the edited SVG as a document page 3) Save as PDF
Particularities of my SVG file:
To have a behaviour similar to a form (so text doesn't overfloq) a clipping path is defined over certain text elements. Some text is alinged left or right. It includes an embbeded raster PNG. Page/document size is A4 210mm X 297mm Uses Arial Font
When following this workflow with iText the end result is satisfactory but with VectSharp I noticed the following problems:
I can't specify Fonts when loading an SVG file with the Parer class, it defaults to Helvetica on my system. Page/document size is 74.1mm x 104.8mm instead of A4 size (210mm X 297mm) (Is this due to using inches instead of cm/mm on some conversions?). Clipping paths are ignored and text overflows. The raster image is imported as RectangleAction instead of RasterImageAction.
Thanks for your time and support!
Here´s the Proof Of Concept code:
Here's the svg as raster with annotations in blue (annotations not included in the svg itself):
Here's the svg file itself:
Here's a zipfile with a sample csproj and the output pdf files vectSharpPOC.zip
VectSharp pdf (included in the above zip) as raster:
iText pdf (included in the above zip) as raster: