ColorBlend Error converting PDF to HTML

blenz · August 4, 2016, 2:46pm

We are currently using Aspose.Pdf and Aspose.Pdf.HTMLSaveOptions to convert PDF files to html and text.

A file that we have is not converting the orginial PDF file to HTML. Below is the error that is getting returned. What could be causing this?

LogLevel=ERROR Logger=DocumentConversion.WebService.Services.ConvertService Message="Failed to convert document from Pdf to Html." Exception="OTJ.Enterprise.Exceptions.ApplicationServiceException: Failed to convert documentfrom Pdf to Html. ---> System.ArgumentException: ColorBlend object that was set is not valid.Position's last element must be equal to 1.0. ColorBlend objects must be constructed with the same number of positions and color values. Positions must be between 0.0 and 1.0, 1.0 indicating the last element in the array.

at System.Drawing.Drawing2D.LinearGradientBrush._SetInterpolationColors(ColorBlend blend)

at .?\x81?.(?? )

at .???.\x8F(??? )

at \x8F?.??.Accept(?? )

at \x8F?.???.Accept(?? )

at \x8F?.??.Accept(?? )

at \x8F?.???.Accept(?? )

at \x8F?.??.Accept(?? )

at \x8F?.???.Accept(?? )

at \x8F?.??.Accept(?? )

at \x8F?.???.Accept(?? )

at \x8F?.??.Accept(?? )

at \x8F?.???.Accept(?? )

at \x8F?.??.Accept(?? )

at \x8F?.???.Accept(?? )

at \x8F?.??.Accept(?? )

at \x8F?.???.Accept(?? )

at \x8F?.??.Accept(?? )

at \x8F?.???.Accept(?? )

at .???.?\x8F(?? , Graphics )

at ?.?.?(??? , \x81? )

at ??\x8D.?.\x8F(??? , Hashtable )

at \x9D..?(? )

at \x8D.?.Convert(ArrayList , ? , ? )

at ?\x90.?\x90.Convert(String , ? , IList`1 , \x81 , ? )

at ?..?(Document , String , Stream , HtmlSaveOptions )

at Aspose.Pdf.Document.Save(String outputFileName, SaveOptions options)

tilal.ahmad · August 4, 2016, 11:11pm

Hi Brent,

Thanks for your inquiry. We will appreciate it if you please share your sample source document here, we will test the scenario and will provide you information accordingly.

We are sorry for the inconvenience.

Best Regards,

blenz · August 5, 2016, 11:50am

Hi Tilal,

The file that was returning the ColorBlend Error is now attached.

Thanks!

Brent

codewarior · August 8, 2016, 1:14am

Hi Brent,

Thanks for sharing the resource file.

I have tested the scenario of PDF to HTML conversion using Aspose.Pdf for .NET 11.9.0 following code snippet and I am unable to notice any problem. As per my observations, the resultant HTML is properly being converted. For your reference, I have also attached the output generated over my end.

[C#]

// load PDF document
Document doc = new Document("c:/pdftest/peter_james_resume.pdf");
// save output as HTML format
doc.Save("c:/pdftest/peter_james_resume.html", SaveFormat.Html);

blenz · August 24, 2016, 6:13pm

We updated to Aspose 11.9, and re-ran the tests.

The conversion on the attached document still fails. If I take out these save options, it works fine, but we are trying to save with the artifacts embedded.

We are using these html save options

var htmlOptions = new HtmlSaveOptions

{

// Enable option to embed all resources inside the HTML

PartsEmbeddingMode = HtmlSaveOptions.PartsEmbeddingModes.EmbedAllIntoHtml,

// This is just optimization for IE and can be omitted

LettersPositioningMethod = HtmlSaveOptions.LettersPositioningMethods.UseEmUnitsAndCompensationOfRoundingErrorsInCss,

RasterImagesSavingMode = HtmlSaveOptions.RasterImagesSavingModes.AsEmbeddedPartsOfPngPageBackground,

FontSavingMode = HtmlSaveOptions.FontSavingModes.SaveInAllFormats

};

With this save call

var pdfIn = new Aspose.Pdf.Document(file);

pdfIn.Save(htmlOutPath, htmlOptions);

We get this error:

Attempting convert of C:\Users\cassy.healy\Documents\LINQPad Queries\ProblemPDFs\peter_james_resume.pdf to html.
C:\Users\cassy.healy\Documents\LINQPad Queries\ProblemPDFs\OUT\peter_james_resume.html FAILED. Message ColorBlend object that was set is not valid.Position's last element must be equal to 1.0. ColorBlend objects must be constructed with the same number of positions and color values. Positions must be between 0.0 and 1.0, 1.0 indicating the last element in the array. Stack Trace at System.Drawing.Drawing2D.LinearGradientBrush._SetInterpolationColors(ColorBlend blend)
at System.Drawing.Drawing2D.LinearGradientBrush.set_InterpolationColors(ColorBlend value)
at

.[1]( [1])

at

.[1]( [1])

at .

(ApsPath [1])

at Aspose.Rendering.Aspose.Foundation5996002.ApsPath.fpyz9lhvvq79hapc3mstgrqrlusmz47y [1](

[1])