An option to throw exception when correct rendering of pdf page to svg is not possible

[stawr93]

Hi there,

I'm using pdftosvg.net to render pdf pages as images and show them to users later. Sometimes users are uploading PDF files containing some content pdftosvg.net is not able to render (e.g. JBIG2 compressed image). In such cases I'd like to fallback to other tool rather than show a broken image placeholder which is produced by pdftosvg.net.

My proposal is to add separate property into SvgConversionOptions (e.g. ThrowIfCannotBeRendered) which is false by default.

On caller-side I can set the property to true and pdftosvg.net will throw an exception when some not-supported feature occur in pdf file.

Usage example:

using (var doc = PdfDocument.Open("input.pdf"))
{
    var options = new SvgConversionOptions { ThrowIfCannotBeRendered = true };
    var pageNo = 1;

    foreach (var page in doc.Pages)
    {
        try
        {
            page.SaveAsSvg($"output-{pageNo++}.svg", options);
        }
        catch (PdfException ex)
        {
            // handle somehow
        }
    }
}