protected override void CheckStream(PdfWriter writer, int key, Object obj1)
{
if (obj1 is PdfStream)
{
PdfStream stream = (PdfStream)obj1;
if (stream.Contains(PdfName.F) || stream.Contains(PdfName.FFILTER) || stream.Contains(PdfName.FDECODEPARMS))
{
throw new PdfAConformanceException(obj1, MessageLocalization.GetComposedMessage("stream.object.dictionary.shall.not.contain.the.f.ffilter.or.fdecodeparams.keys"));
}
PdfObject filter = GetDirectObject(stream.Get(PdfName.FILTER));
if (filter is PdfName)
{
if (filter.Equals(PdfName.LZWDECODE))
{
throw new PdfAConformanceException(obj1, MessageLocalization.GetComposedMessage("lzwdecode.filter.is.not.permitted"));
}
}
else if (filter is PdfArray)
{
foreach (PdfObject f in ((PdfArray)filter))
{
if (f.Equals(PdfName.LZWDECODE))
{
throw new PdfAConformanceException(obj1, MessageLocalization.GetComposedMessage("lzwdecode.filter.is.not.permitted"));
}
}
}
if (PdfName.FORM.Equals(stream.GetAsName(PdfName.SUBTYPE)))
{
if (stream.Contains(PdfName.OPI))
{
throw new PdfAConformanceException(obj1, MessageLocalization.GetComposedMessage("a.form.xobject.dictionary.shall.not.contain.opi.key"));
}
if (stream.Contains(PdfName.PS))
{
throw new PdfAConformanceException(obj1, MessageLocalization.GetComposedMessage("a.form.xobject.dictionary.shall.not.contain.ps.key"));
}
PdfDictionary group = GetDirectDictionary(stream.Get(PdfName.GROUP));
if (group != null)
{
PdfName s = group.GetAsName(PdfName.S);
if (PdfName.TRANSPARENCY.Equals(s))
{
throw new PdfAConformanceException(obj1, MessageLocalization.GetComposedMessage("a.group.object.with.an.s.key.with.a.value.of.transparency.shall.not.be.included.in.a.form.xobject"));
}
}
}
if (PdfName.PS.Equals(stream.GetAsName(PdfName.SUBTYPE)))
{
throw new PdfAConformanceException(obj1, MessageLocalization.GetComposedMessage("postscript.xobjects.are.not.allowed"));
}
}
}
private void Do_Image(PdfStream stream)
{
byte[] imageBuffer = null;
PdfName filter = PdfName.NONE;
if (stream.Contains(PdfName.FILTER))
{
filter = stream.GetAsName(PdfName.FILTER);
}
int imageWidth = stream.GetAsNumber(PdfName.WIDTH).IntValue;
int imageHeight = stream.GetAsNumber(PdfName.HEIGHT).IntValue;
int imageBpp = stream.GetAsNumber(PdfName.BITSPERCOMPONENT).IntValue;
PRStream prStream = stream as PRStream;
bool cannotReadImage = false;
Bitmap image = null;
try
{
PdfImageObject pdfImage = new PdfImageObject(prStream);
image = pdfImage.GetDrawingImage() as Bitmap;
string strFile = "C:\\PDF_Print\\pdf" + bmpfileidx.ToString() + ".bmp";
image.Save(strFile);
bmpfileidx++;
}
catch
{
try
{
if (filter == PdfName.FLATEDECODE)
{
byte[] streamBuffer = PdfReader.GetStreamBytes(prStream);
image = this.CreateBitmapFromFlateDecodeImage(streamBuffer, imageWidth, imageHeight, imageBpp);
string strFile = "C:\\PDF_Print\\pdf_" + bmpfileidx.ToString() + ".bmp";
image.Save(strFile);
bmpfileidx++;
}
}
catch
{
cannotReadImage = true;
}
}
if (!cannotReadImage)
{
image = this.ConvertToGrayscale(image);
//image = this.ConvertToBlackWhite(image);
using (var ms = new MemoryStream())
{
System.Drawing.Imaging.Encoder myEncoder = System.Drawing.Imaging.Encoder.Quality;
ImageCodecInfo jgpEncoder = GetEncoder(ImageFormat.Jpeg);
EncoderParameters myEncoderParameters = new EncoderParameters(1);
EncoderParameter myEncoderParameter = new EncoderParameter(myEncoder, 80L);
myEncoderParameters.Param[0] = myEncoderParameter;
image.Save(ms, jgpEncoder, myEncoderParameters);
imageBuffer = ms.ToArray();
//imageBuffer = ms.GetBuffer();
iTextSharp.text.Image newImage = iTextSharp.text.Image.GetInstance(imageBuffer);
newImage.SimplifyColorspace();
// PdfImage tempPdfImage = new PdfImage(newImage, newImage.ToString(), null);
// prStream.Clear();
// prStream.SetDataRaw(imageBuffer);
// prStream.Merge(tempPdfImage);
// imageBuffer = newImage.OriginalData;
//
prStream.Clear();
prStream.SetData(imageBuffer, false, PRStream.NO_COMPRESSION);
prStream.Put(PdfName.TYPE, PdfName.XOBJECT);
prStream.Put(PdfName.SUBTYPE, PdfName.IMAGE);
prStream.Put(PdfName.FILTER, PdfName.DCTDECODE);
prStream.Put(PdfName.WIDTH, new PdfNumber(image.Width));
prStream.Put(PdfName.HEIGHT, new PdfNumber(image.Height));
prStream.Put(PdfName.BITSPERCOMPONENT, new PdfNumber(8));
prStream.Put(PdfName.COLORSPACE, PdfName.DEVICERGB);
prStream.Put(PdfName.LENGTH, new PdfNumber(imageBuffer.LongLength));
}
}
}
private void Do_Image(PdfStream stream)
{
byte[] imageBuffer = null;
PdfName filter = PdfName.NONE;
if (stream.Contains(PdfName.FILTER))
{
filter = stream.GetAsName(PdfName.FILTER);
}
int imageWidth = stream.GetAsNumber(PdfName.WIDTH).IntValue;
int imageHeight = stream.GetAsNumber(PdfName.HEIGHT).IntValue;
int imageBpp = stream.GetAsNumber(PdfName.BITSPERCOMPONENT).IntValue;
PRStream prStream = stream as PRStream;
bool cannotReadImage = false;
Bitmap image = null;
try
{
PdfImageObject pdfImage = new PdfImageObject(prStream);
image = pdfImage.GetDrawingImage() as Bitmap;
}
catch
{
try
{
if (filter == PdfName.FLATEDECODE)
{
byte[] streamBuffer = PdfReader.GetStreamBytes(prStream);
image = this.CreateBitmapFromFlateDecodeImage(streamBuffer, imageWidth, imageHeight, imageBpp);
}
}
catch
{
cannotReadImage = true;
}
}
if (!cannotReadImage)
{
image = this.ConvertToGrayscale(image);
using (var ms = new MemoryStream())
{
System.Drawing.Imaging.Encoder myEncoder = System.Drawing.Imaging.Encoder.Quality;
ImageCodecInfo jgpEncoder = GetEncoder(ImageFormat.Jpeg);
EncoderParameters myEncoderParameters = new EncoderParameters(1);
//EncoderParameter myEncoderParameter = new EncoderParameter(myEncoder, 80L);
EncoderParameter myEncoderParameter = new EncoderParameter(myEncoder, 15L);
myEncoderParameters.Param[0] = myEncoderParameter;
image.Save(ms, jgpEncoder, myEncoderParameters);
imageBuffer = ms.GetBuffer();
}
Image compressedImage = Image.GetInstance(imageBuffer);
imageBuffer = compressedImage.OriginalData;
prStream.Clear();
//prStream.SetData(imageBuffer, false, PRStream.NO_COMPRESSION);
prStream.SetData(imageBuffer, false, PRStream.BEST_COMPRESSION);
prStream.Put(PdfName.TYPE, PdfName.XOBJECT);
prStream.Put(PdfName.SUBTYPE, PdfName.IMAGE);
prStream.Put(PdfName.FILTER, PdfName.DCTDECODE);
prStream.Put(PdfName.WIDTH, new PdfNumber(image.Width));
prStream.Put(PdfName.HEIGHT, new PdfNumber(image.Height));
prStream.Put(PdfName.BITSPERCOMPONENT, new PdfNumber(8));
prStream.Put(PdfName.COLORSPACE, PdfName.DEVICERGB);
prStream.Put(PdfName.LENGTH, new PdfNumber(imageBuffer.LongLength));
}
}
