private List <PageInfo> ConverByAppose(string inputFile, ImageConversionOptions options)
{
var pages = new List <PageInfo>();
try
{
using (var doc = new Aspose.Pdf.Document(inputFile))
{
// Dynamic XFA to Standard AcroForm PDF conversion currently has issues so don't even attempt
if (doc.Form.Type == FormType.Dynamic)
{
throw new Exception("PDF file in XFA format is not supported.");
}
// Flatten the pdf
doc.Flatten();
// Setup the device for rendering the PDF pages
var device = new PngDevice(new Resolution(options.Resolution));
foreach (Aspose.Pdf.Page page in doc.Pages)
{
using (MemoryStream ms = new MemoryStream())
{
// Render the PDF
device.Process(page, ms);
// Set the stream position back to 0
ms.Seek(0, SeekOrigin.Begin);
try
{
// Convert and add the image to the list of pages
pages.AddRange(ImageProcessingEngine.Instance.Convert(ms, options));
}
catch (Exception e)
{
if (e.Message == "Decode: Unknown or wrong format [Stream][CiImage::Open]")
{
// This is a known error, there is an occasional issue with the ClearImage Open method
// Loading the stream into a Bitmap object works around the issue for now...
using (var stream = new MemoryStream(ms.ToArray()))
using (var bitmap = (Bitmap)Bitmap.FromStream(stream, true, false))
{
pages.AddRange(ImageProcessingEngine.Instance.Convert(bitmap, options));
}
}
else
{
throw;
}
}
}
}
}
}
catch (InvalidPasswordException)
{
throw;
}
catch
{
// Reset the Page Index
options.PageIndex = 0;
// Try to process using ClearImage
pages = ImageProcessingEngine.Instance.Convert(inputFile, options);
}
return(pages);
}
