public void CheckActions_ResultedFileContainsOnlyImages_ProperlyRotated()
{
string inPdfPath = Directory.GetCurrentDirectory() + @"\BlackRectangles1.pdf";
PdfProcessorTests.FlushResourceToFile(Resources + "BlackRectangles.pdf", inPdfPath);
string outPdfPath = inPdfPath + ".out.pdf";
using (var reader = new PdfReader(inPdfPath))
{
using (var fs = new FileStream(outPdfPath, FileMode.Create))
{
using (var stamper = new PdfStamper(reader, fs))
{
using (var render = new GsNetPdfRender(inPdfPath, 150))
{
var andFilter = new AndFilter(
new HasSpecialCsResourceFilter(reader),
new NotFilter(new HasFontResourceFilter(reader)),
new NotFilter(
new PageHasSpecificKeyFilter(
reader,
RenderPageAction.EstPageRendered,
new PdfBoolean(true))));
using (var action = new RenderPageAction(reader, stamper, andFilter, render))
{
var processor = new PdfProcessor(new List <IPdfAction> {
action
});
for (int i = 1; i <= reader.NumberOfPages; i++)
{
processor.Execute(i);
}
}
}
}
}
}
using (var reader = new PdfReader(outPdfPath))
{
AssertPageRotation(reader, 1, 0);
AssertOnlyImageAndImageSize(reader, 1, 1275, 1650);
AssertPageRotation(reader, 2, 90);
AssertOnlyImageAndImageSize(reader, 2, 1275, 1650);
AssertPageRotation(reader, 3, 180);
AssertOnlyImageAndImageSize(reader, 3, 1275, 1650);
}
}
/// <summary>
/// The render scanned pages with GhostScript.Net.
/// </summary>
/// <param name="inPdfBuffer">
/// The in PDF memory stream.
/// </param>
/// <param name="outPdfBuffer">
/// The out PDF stream (any).
/// </param>
/// <param name="resolution">
/// The resolution.
/// </param>
/// <returns>
/// The <see cref="bool"/>.
/// </returns>
public bool RenderSpecialCsPagesWithGsNet(byte[] inPdfBuffer, out byte[] outPdfBuffer, int resolution)
{
bool result = false;
PdfReader.unethicalreading = true;
using (var reader = new PdfReader(inPdfBuffer))
{
// Check if document has scanned pages.
var andFilter =
new AndFilter(new List <PdfFilter>
{
new HasSpecialCsResourceFilter(reader),
// removed the comment out here to make all unit tests working as designed by the author
new NotFilter(new HasFontResourceFilter(reader)),
new NotFilter(new PageHasSpecificKeyFilter(reader, RenderPageAction.EstPageRendered, new PdfBoolean(true)))
});
var processor = new PdfProcessor(new List <IPdfAction> {
andFilter
});
bool containsSpecialCsPages = false;
for (var i = 1; i <= reader.NumberOfPages; i++)
{
if (processor.Execute(i))
{
containsSpecialCsPages = true;
break;
}
}
// Render the document if it has scanned pages.
if (containsSpecialCsPages)
{
using (var outPdfStream = new MemoryStream())
{
using (var stamper = new PdfStamper(reader, outPdfStream))
{
using (var render = CreateGsNetPdfRender(inPdfBuffer, resolution))
{
var action = new RenderPageAction(reader, stamper, andFilter, render);
processor = new PdfProcessor(new List <IPdfAction> {
action
});
for (var i = 1; i <= reader.NumberOfPages; i++)
{
result |= processor.Execute(i);
}
}
reader.RemoveUnusedObjects();
}
outPdfBuffer = outPdfStream.ToArray();
}
}
else
{
outPdfBuffer = inPdfBuffer;
}
reader.Close();
return(result);
}
}
