|
private SimplifyColorspace ( |
||
| obj | ||
| 리턴 | ||
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));
}
}
}