We have a process where we scan batches of paper documents into a single large PDF. Each document is separated by a special document with a barcode. This special barcode document indicate where individual document ends. Our .NET 8 application uses Aspose.Pdf and Aspose.BarCode to loop through the large PDF pages, detect barcode pages, and split the large file into individual PDFs.
This worked fine on Windows, but after moving to Linux, we got this error:
System.PlatformNotSupportedException: System.Drawing.Common is not supported on non-Windows platforms
After researching, we found that Aspose.Pdf depends on System.Drawing.Common, which isn’t supported on Linux. Aspose recommended using Aspose.Pdf.Drawing instead.
After switching to Aspose.Pdf.Drawing, the process works, but it’s now much slower. A file that used to take 14 seconds now takes 90 seconds (On Windows)
Questions
- Is it correct that we have to use Aspose.Pdf.Drawing for Linux?
- Is Aspose.Pdf.Drawing generally slower than Aspose.Pdf on Windows, or is there something else causing this slowdown? ( We have not tested on Linux yet)
Here’s the original error and our code:
var barcodePageNumbers = new List<int>();
var currentPageNumber = 0;
using (PdfConverter converter = new PdfConverter())
{
converter.BindPdf(args.SourceFilePath);
converter.RenderingOptions.BarcodeOptimization = true;
converter.DoConvert();
while (converter.HasNextImage())
{
currentPageNumber++;
using (var ms = new MemoryStream())
{
converter.GetNextImage(ms);
ms.Seek(0L, SeekOrigin.Begin);
BarCodeReader reader = new BarCodeReader(ms, DecodeType.Code128);
foreach (var barcodeResult in reader.ReadBarCodes())
{
var text = barcodeResult.GetCodeText(UTF8Encoding.UTF8);
if (text == _barcodeTextToMatch)
{
barcodePageNumbers.Add(currentPageNumber);
}
}
}
}
}
// once we have barcode page number just split the PDF document by page number
System.TypeInitializationException: The type initializer for ‘Gdip’ threw an exception. —> System.PlatformNotSupportedException: System.Drawing.Common is not supported on non-Windows platforms. See Breaking change: System.Drawing.Common only supported on Windows - .NET | Microsoft Learn for more information. at System.Drawing.SafeNativeMethods.Gdip.<>c.<.cctor>b__2_0(String _, Assembly _, Nullable`1 _) at System.Runtime.InteropServices.NativeLibrary.LoadLibraryCallbackStub(String libraryName, Assembly assembly, Boolean hasDllImportSearchPathFlags, UInt32 dllImportSearchPathFlags) at System.Drawing.SafeNativeMethods.Gdip.g____PInvoke|32_0(IntPtr* __token_native, StartupInputEx* __input_native, StartupOutput* __output_native) at System.Drawing.SafeNativeMethods.Gdip.GdiplusStartup(IntPtr& token, StartupInputEx& input, StartupOutput& output) at System.Drawing.SafeNativeMethods.Gdip…cctor() — End of inner exception stack trace — at System.Drawing.SafeNativeMethods.Gdip.GdipCreateMatrix2(Single m11, Single m12, Single m21, Single m22, Single dx, Single dy, IntPtr& matrix) at System.Drawing.Drawing2D.Matrix…ctor(Single m11, Single m12, Single m21, Single m22, Single dx, Single dy) at #=zW1YAYkz5bcj2nQoDh_ydVz$M7QJ2SZuLZYbWZlI=…ctor(Single #=zpcAdqfU=, Single #=zxwZSCAQ=, Single #=zqRLsDX4=, Single #=zpkJoj9s=, Single #=zF50kutU=, Single #=zZEOxIWg=) at #=zBUN4d05feDPS7TPv1yk5HjO3XKmuJ_2gOg==.#=zRGDw0Fg=(Single #=zpcAdqfU=, Single #=zxwZSCAQ=, Single #=zqRLsDX4=, Single #=zpkJoj9s=, Single #=zF50kutU=, Single #=zZEOxIWg=, #=zQYVZBo0uMKOra$SyWch8P9C3ViZ1CHyiUw== #=zGCq7lME=) at #=zShRkjCpo$3KTp7XXB7mpCtc02W5LcZnVN6K6EU1kfQ0L.#=zwA2jOkXLTGIA(#=z7dhpk_vfEIz7FfPz6cbysBf_21_inFDf7w== #=zKjEPxqU=, #=zO4hQbTkRieRIFg1mQ7Lf2amFG5NVs_LiJ8jXhNQ= #=zN96Kzm7WZ5rG, #=zxdeQ74Q5orUf3PwmbmUL2Ia7f6uoONdC9Q== #=z$AvNA2c=, Single #=zb423ro2xAayl, Single #=zrkCrALjeAYUd, Boolean #=zbW1TMBxn$dnhAjhCUw==, Int32 #=zGZ9Lm_swvKerOLJjMi3ePz0=, Boolean #=zNrVf667IUTTI, Double& #=zZxpjBgA=, Double& #=zr7XQyzs=, #=zIQMBBbG68PpvoB6bKOFP4sPejfNoOmcEyg==& #=zY6rj0hg=) at #=zShRkjCpo$3KTp7XXB7mpCtc02W5LcZnVN6K6EU1kfQ0L…ctor(#=zYL8YM7mrq3V5DXSbeGU0ZPDsdZt4 #=zMeb_lpo=, #=z7dhpk_vfEIz7FfPz6cbysBf_21_inFDf7w== #=zKjEPxqU=, #=zO4hQbTkRieRIFg1mQ7Lf2amFG5NVs_LiJ8jXhNQ= #=zN96Kzm7WZ5rG) at #=zElAxYPNuNbmPAysLJmUe6KKcjKWgLQN5ko4fH_o=.#=z_ky9CgF1EWrV(#=zYL8YM7mrq3V5DXSbeGU0ZPDsdZt4 #=zMeb_lpo=, #=z7dhpk_vfEIz7FfPz6cbysBf_21_inFDf7w== #=zKjEPxqU=, #=zO4hQbTkRieRIFg1mQ7Lf2amFG5NVs_LiJ8jXhNQ= #=zN96Kzm7WZ5rG) at #=zQCcci$P9KO6aruY_AVdW2nVrwwJe5BD9a5YJUhvgNVEE.#=zLVxdIus=(#=zYL8YM7mrq3V5DXSbeGU0ZPDsdZt4 #=zMeb_lpo=, #=z7dhpk_vfEIz7FfPz6cbysBf_21_inFDf7w== #=zKjEPxqU=, #=zO4hQbTkRieRIFg1mQ7Lf2amFG5NVs_LiJ8jXhNQ= #=z_LIjDR4=, #=zShRkjCpo$3KTp7XXB7mpCtc02W5LcZnVN6K6EU1kfQ0L& #=zlXiIfhs=) at #=z1CZaqk5CivJdo1AWQYb_mYd59YSM.#=zy5o_ws0=(#=zShRkjCpo$3KTp7XXB7mpCtc02W5LcZnVN6K6EU1kfQ0L& #=zlXiIfhs=) at #=z1CZaqk5CivJdo1AWQYb_mYd59YSM.#=zy5o_ws0=() at Aspose.Pdf.Devices.ImageDevice.#=zy5o_ws0=(Page #=zKjEPxqU=) at Aspose.Pdf.Devices.JpegDevice.Process(Page page, Stream output) at Aspose.Pdf.Facades.PdfConverter.GetNextImage(Stream outputStream, ImageFormat format, Int32 imageWidth, Int32 imageHeight, Int32 quality) at Aspose.Pdf.Facades.PdfConverter.GetNextImage(Stream outputStream) at