/// <summary>
/// Writes the pages numbers
/// </summary>
/// <param name="font">Font</param>
/// <param name="fontSize">Fonr size</param>
/// <param name="xPt">X position from the bottom in points</param>
/// <param name="yPt">Y position from the bottom in points</param>
/// <param name="rgb">RGB color. Blue is the lower byte</param>
public void WritePagesNumbers(PdfFont font, int fontSize, int xPt, int yPt, int rgb)
{
string color = FormatRGB(rgb);
int pageCount = _pages.Count;
for (int i = 0; i < pageCount; i++)
{
PdfPage page = _pages[i];
string txt = (i + 1) + "/" + pageCount;
float txtWidth = font.MesureWidth(txt, fontSize);
int xPtAbs = xPt < 0 ? (int)(xPt + page.Width - txtWidth) : xPt;
StringBuilder sb = new StringBuilder();
sb.Append("BT ");
sb.Append(color + " rg ");
sb.Append(font.CodeName + " " + fontSize + " Tf ");
sb.Append(xPtAbs + " " + yPt + " Td\n");
sb.Append("(" + txt + ")Tj\n");
sb.Append("ET");
int id = WriteStreamObject(sb);
page.AddContent(id);
}
}
/// <summary>
/// Adds an image.
/// Encodes in JPEG if the image is already in JPEG and in PNG otherwise.
/// </summary>
/// <param name="bitmap">Bitmap</param>
/// <param name="xPt">X position from the bottom in points</param>
/// <param name="yPt">Y position from the bottom in points</param>
/// <param name="widthPt">Width in points</param>
/// <param name="heightPt">Height in points</param>
public void WriteBitmap(Bitmap bitmap, int xPt, int yPt, int widthPt, int heightPt)
{
int idImg = _xRefs.CreateObject();
int idImgLength = _xRefs.CreateObject();
string imgName = "/I" + idImg;
bool isJpeg = bitmap.RawFormat.Guid == ImageFormat.Jpeg.Guid;
int dataLength = 0;
_xRefs.RegisterObject(idImg);
_pdfWriter.WriteLine(idImg + " 0 obj");
_pdfWriter.WriteLine("<<");
_pdfWriter.WriteLine("/Type /XObject");
_pdfWriter.WriteLine("/Subtype /Image");
_pdfWriter.WriteLine("/ColorSpace /DeviceRGB");
_pdfWriter.WriteLine("/BitsPerComponent 8");
if (isJpeg)
{
_pdfWriter.WriteLine("/Filter /DCTDecode");
}
else
{
_pdfWriter.WriteLine("/Filter /FlateDecode");
_pdfWriter.WriteLine("/DecodeParms <<");
_pdfWriter.WriteLine(" /Columns " + bitmap.Width);
_pdfWriter.WriteLine(" /Colors 3");
_pdfWriter.WriteLine(" /Predictor 15");
_pdfWriter.WriteLine(">>");
}
_pdfWriter.WriteLine("/Name " + imgName);
_pdfWriter.WriteLine("/Height " + bitmap.Height);
_pdfWriter.WriteLine("/Width " + bitmap.Width);
_pdfWriter.WriteLine("/Length " + idImgLength + " 0 R");
_pdfWriter.WriteLine(">>");
_pdfWriter.WriteLine("stream");
_pdfWriter.Flush();
if (isJpeg)
{
dataLength = PdfImage.WriteJPEG(bitmap, _pdfStream);
}
else
{
dataLength = PdfImage.WritePNG(bitmap, _pdfStream);
}
_pdfWriter.WriteLine();
_pdfWriter.WriteLine("endstream");
_pdfWriter.WriteLine("endobj");
//Writes the length object
_xRefs.RegisterObject(idImgLength);
_pdfWriter.WriteLine(idImgLength + " 0 obj");
_pdfWriter.WriteLine(dataLength);
_pdfWriter.WriteLine("endobj");
//create image content and borders
StringBuilder sb = new StringBuilder();
sb.Append("q ");
sb.Append(widthPt + " 0 0 " + heightPt + " " + xPt + " " + yPt + " cm ");
sb.Append(imgName);
sb.Append(" Do Q\n");
sb.Append("0.5 w 0.2 G ");
sb.Append(xPt + " " + yPt + " " + widthPt + " " + heightPt + " re s");
int idContent = WriteStreamObject(sb);
//add the created objects to the page
_currentPage.AddContent(idContent);
_currentPage.AddXObject(idImg, imgName);
}
