Convert SVG to PNG using C #

Question

I am trying to convert SVG images to PNG using C #, without having to write too much code. Can anyone recommend a library or sample code for this?

Answer 1

You can invoke the inkscape version of the command line:

http://harriyott.com/2008/05/converting-svg-images-to-png-in-c.aspx

There is also a SVG SVG rendering engine, primarily designed so that SVG files can be used on the Internet on a code screen that can satisfy your needs if this is your problem:

Original project
http://www.codeplex.com/svg

Fork with corrections and additional activity: (added on 7/2013)
https://github.com/vvvv/SVG

Answer 2

There is a much simpler way to use the http://svg.codeplex.com/ library (newer version @ GIT , @ NuGet ). Here is my code

var byteArray = Encoding.ASCII.GetBytes(svgFileContents); using (var stream = new MemoryStream(byteArray)) { var svgDocument = SvgDocument.Open(stream); var bitmap = svgDocument.Draw(); bitmap.Save(path, ImageFormat.Png); } 

Answer 3

When I had to rasterize svgs on the server, I ended up using P / Invoke to call librsvg functions (you can get the DLL from the window version of the GIMP image editing program).

 [DllImport("kernel32.dll", SetLastError = true)] static extern bool SetDllDirectory(string pathname); [DllImport("libgobject-2.0-0.dll", SetLastError = true)] static extern void g_type_init(); [DllImport("librsvg-2-2.dll", SetLastError = true)] static extern IntPtr rsvg_pixbuf_from_file_at_size(string file_name, int width, int height, out IntPtr error); [DllImport("libgdk_pixbuf-2.0-0.dll", CallingConvention = CallingConvention.Cdecl, CharSet = CharSet.Ansi)] static extern bool gdk_pixbuf_save(IntPtr pixbuf, string filename, string type, out IntPtr error, __arglist); public static void RasterizeSvg(string inputFileName, string outputFileName) { bool callSuccessful = SetDllDirectory("C:\\Program Files\\GIMP-2.0\\bin"); if (!callSuccessful) { throw new Exception("Could not set DLL directory"); } g_type_init(); IntPtr error; IntPtr result = rsvg_pixbuf_from_file_at_size(inputFileName, -1, -1, out error); if (error != IntPtr.Zero) { throw new Exception(Marshal.ReadInt32(error).ToString()); } callSuccessful = gdk_pixbuf_save(result, outputFileName, "png", out error, __arglist(null)); if (!callSuccessful) { throw new Exception(error.ToInt32().ToString()); } } 

Answer 4

I use Batik for this. Full Delphi Code:

 procedure ExecNewProcess(ProgramName : String; Wait: Boolean); var StartInfo : TStartupInfo; ProcInfo : TProcessInformation; CreateOK : Boolean; begin FillChar(StartInfo, SizeOf(TStartupInfo), #0); FillChar(ProcInfo, SizeOf(TProcessInformation), #0); StartInfo.cb := SizeOf(TStartupInfo); CreateOK := CreateProcess(nil, PChar(ProgramName), nil, nil, False, CREATE_NEW_PROCESS_GROUP + NORMAL_PRIORITY_CLASS, nil, nil, StartInfo, ProcInfo); if CreateOK then begin //may or may not be needed. Usually wait for child processes if Wait then WaitForSingleObject(ProcInfo.hProcess, INFINITE); end else ShowMessage('Unable to run ' + ProgramName); CloseHandle(ProcInfo.hProcess); CloseHandle(ProcInfo.hThread); end; procedure ConvertSVGtoPNG(aFilename: String); const ExecLine = 'c:\windows\system32\java.exe -jar C:\Apps\batik-1.7\batik-rasterizer.jar '; begin ExecNewProcess(ExecLine + aFilename, True); end; 

Answer 5

To add @Anish to the answer, if you have problems with lack of text when exporting SVG to an image, you can create a recursive function to scroll the children of SVGDocument elements, try applying it to SvgText if possible (add your own error checking) and set the family Fonts and style.

  foreach(var child in svgDocument.Children) { SetFont(child); } public void SetFont(SvgElement element) { foreach(var child in element.Children) { SetFont(child); //Call this function again with the child, this will loop //until the element has no more children } try { var svgText = (SvgText)parent; //try to cast the element as a SvgText //if it succeeds you can modify the font svgText.Font = new Font("Arial", 12.0f); svgText.FontSize = new SvgUnit(12.0f); } catch { } } 

Let me know if you have any questions.

Answer 6

you can use altsoft xml2pdf lib for this