|
public static SetPageDeviceCommand ( PrintTicket ticket ) : IEnumerable |
||
| ticket | PrintTicket | |
| return | IEnumerable |
|
protected byte[] ProcessData(string username, PrintTicket ticket, byte[] data, string[] inargs, string[] extraargs, string[] devsetup)
{
string[] pagesetup = PostscriptHelper.SetPageDeviceCommand(ticket).ToArray();
string[] args = new string[] { "-dNOPAUSE", "-dBATCH" }
.Concat(inargs ?? new string[] { })
.Concat(extraargs ?? new string[] { })
.Concat(new string[] { "-sOutputFile=%stdout" })
.Concat(new string[] { "-c" })
.Concat(devsetup ?? new string[] { })
.Concat(pagesetup)
.Concat(new string[] { "-" })
.ToArray();
MemoryStream outstream = new MemoryStream();
MemoryStream errstream = new MemoryStream();
MemoryStream instream = new MemoryStream(data);
int exitcode;
if (username != null)
{
exitcode = RunCommandAsUser(username, args, instream, outstream, errstream);
}
else
{
exitcode = RunCommand(args, instream, outstream, errstream);
}
string errstr = Encoding.UTF8.GetString(errstream.ToArray());
if (exitcode != 0)
{
Logger.Log(LogLevel.Warning, "Ghostscript returned code {0}\n\nError:\n{1}", exitcode, errstr);
throw new InvalidOperationException(String.Format("Ghostscript error {0}\n{1}", exitcode, errstr));
}
return(outstream.ToArray());
}
public static PaginatedPrintData FromPDF(byte[] PDFData, PrintTicket ticket)
{
List <byte> pagesetup = PostscriptHelper.SetPageDeviceCommand(ticket).SelectMany(w =>
{
List <byte> wb = Encoding.ASCII.GetBytes(w).ToList();
wb.Add((byte)' ');
return(wb);
}).ToList();
pagesetup.Add((byte)'\n');
byte[] psdata = PostscriptHelper.FromPDF(PDFData);
bool inprologue = true;
List <byte[]> pages = new List <byte[]>();
List <byte> prologue = new List <byte>();
byte[] epilogue = null;
byte[] pdfsetup = Encoding.ASCII.GetBytes("false pdfSetup");
byte[] pagesep = Encoding.ASCII.GetBytes("%%Page:");
byte[] trailer = Encoding.ASCII.GetBytes("%%Trailer");
int start = 0;
for (int i = 0; i < psdata.Length; i++)
{
if (i == 0 || psdata[i - 1] == '\n')
{
if (inprologue && i < psdata.Length - pdfsetup.Length && pdfsetup.Select((v, j) => psdata[i + j] == v).All(v => v))
{
byte[] _prologue = new byte[i - start];
Array.Copy(psdata, start, _prologue, 0, i - start);
prologue.AddRange(_prologue);
prologue.AddRange(pagesetup);
i += pdfsetup.Length;
start = i;
}
else if (i < psdata.Length - pagesep.Length && pagesep.Select((v, j) => psdata[i + j] == v).All(v => v))
{
if (inprologue)
{
byte[] _prologue = new byte[i - start];
Array.Copy(psdata, start, _prologue, 0, i - start);
prologue.AddRange(_prologue);
inprologue = false;
start = i;
}
else
{
byte[] page = new byte[i - start];
Array.Copy(psdata, start, page, 0, i - start);
pages.Add(page);
start = i;
}
}
else if (i < psdata.Length - trailer.Length && trailer.Select((v, j) => psdata[i + j] == v).All(v => v))
{
byte[] page = new byte[i - start];
Array.Copy(psdata, start, page, 0, i - start);
pages.Add(page);
epilogue = new byte[psdata.Length - i];
Array.Copy(psdata, i, epilogue, 0, psdata.Length - i);
break;
}
}
}
return(new PaginatedPrintData
{
Prologue = prologue.ToArray(),
PageData = pages.ToArray(),
Epilogue = epilogue
});
}
