public static DateTime?GetMetaTextAsDate(IntPtr document, string tag)
{
string dt = CallNative.GetMetaText(document, tag);
DateTime parseDate;
if (string.IsNullOrEmpty(dt))
{
return(null);
}
Regex dtRegex =
new Regex(
@"(?:D:)(?<year>\d\d\d\d)(?<month>\d\d)(?<day>\d\d)(?<hour>\d\d)(?<minute>\d\d)(?<second>\d\d)(?<tz_offset>[+-zZ])?(?<tz_hour>\d\d)?'?(?<tz_minute>\d\d)?'?");
Match match = dtRegex.Match(dt);
if (match.Success)
{
var year = match.Groups["year"].Value;
var month = match.Groups["month"].Value;
var day = match.Groups["day"].Value;
var hour = match.Groups["hour"].Value;
var minute = match.Groups["minute"].Value;
var second = match.Groups["second"].Value;
var tzOffset = match.Groups["tz_offset"]?.Value;
var tzHour = match.Groups["tz_hour"]?.Value;
var tzMinute = match.Groups["tz_minute"]?.Value;
string formattedDate = $"{year}-{month}-{day}T{hour}:{minute}:{second}.0000000";
if (!string.IsNullOrEmpty(tzOffset))
{
switch (tzOffset)
{
case "Z":
case "z":
formattedDate += "+0";
break;
case "+":
case "-":
formattedDate += $"{tzOffset}{tzHour}:{tzMinute}";
break;
}
}
if (!DateTime.TryParse(formattedDate, out parseDate))
{
throw new FormatException();
}
return(parseDate);
}
return(null);
}
public bool RenderPDFPageToBitmap(int pageNumber, IntPtr bitmapHandle, int dpiX, int dpiY,
int boundsOriginX, int boundsOriginY, int boundsWidth, int boundsHeight,
int rotate, CallNative.FPDF flags, bool renderFormFill)
{
using (var pageData = new CallNative.PageData(_doc, pageNumber))
{
CallNative.GetFPDFRenderPageBitmap(bitmapHandle, pageData.Page, boundsOriginX, boundsOriginY,
boundsWidth, boundsHeight, 0, flags);
}
return(true);
}
public PdfInformation GetInformation()
{
var pdfInfo = new PdfInformation();
pdfInfo.Creator = CallNative.GetMetaText(_doc, "Creator");
pdfInfo.Title = CallNative.GetMetaText(_doc, "Title");
pdfInfo.Author = CallNative.GetMetaText(_doc, "Author");
pdfInfo.Subject = CallNative.GetMetaText(_doc, "Subject");
pdfInfo.Keywords = CallNative.GetMetaText(_doc, "Keywords");
pdfInfo.Producer = CallNative.GetMetaText(_doc, "Producer");
pdfInfo.CreationDate = CallNative.GetMetaTextAsDate(_doc, "CreationDate");
pdfInfo.ModificationDate = CallNative.GetMetaTextAsDate(_doc, "ModDate");
return(pdfInfo);
}
public bool LoadFile(string F)
{
string file = F;
_doc = CallNative.GetFPDFLoadDocument(file, null);
if (_doc == IntPtr.Zero)
{
return(false);
}
else
{
return(true);
}
}
public Image Render(int page, int width, int height, float dpiX, float dpiY)
{
var bitmap = new Bitmap(width, height, PixelFormat.Format32bppArgb);
bitmap.SetResolution(dpiX, dpiY);
var data = bitmap.LockBits(new Rectangle(0, 0, width, height), ImageLockMode.ReadWrite, bitmap.PixelFormat);
try
{
var handle = CallNative.GetFPDFBitmapCreateEx(width, height, 4, data.Scan0, width * 4);
uint background = 0xFFFFFFFF;
CallNative.GetFPDFBitmapFillRect(handle, 0, 0, width, height, background);
this.RenderPDFPageToBitmap(
page,
handle,
(int)dpiX, (int)dpiY,
0, 0, width, height,
0,
0,
false);
CallNative.GetFPDFBitmapDestroy(handle);
}
catch (Exception ex)
{
Console.Write("Unable to render PDF image.");
throw new Win32Exception("RenderFPDFPageToBitmap.", ex);
}
finally
{
bitmap.UnlockBits(data);
}
return(bitmap);
}
public int PageCount()
{
return(CallNative.GetFPDFGetPageCount(_doc));
}
public Pdfium()
{
CallNative.GetFPDFInitLibrary();
}
