/* Close the display device and delete the instance */
public gsParamState_t DisplayDeviceClose()
{
int code = 0;
gsParamState_t out_params = new gsParamState_t();
out_params.result = GS_Result_t.gsOK;
try
{
int code1 = ghostapi.gsapi_exit(dispInstance);
if ((code == 0) || (code == gsConstants.E_QUIT))
{
code = code1;
}
ghostapi.gsapi_delete_instance(dispInstance);
dispInstance = IntPtr.Zero;
}
catch (Exception except)
{
gsDLLProblemMain("Exception: " + except.Message);
out_params.result = GS_Result_t.gsFAILED;
}
return(out_params);
}
/* Launch a thread rendering a set of pages with the display device. For use with languages
* that can be indexed via pages which include PDF and XPS */
public gsStatus gsDisplayDeviceRenderPages(String fileName, int first_page, int last_page, double zoom)
{
gsParamState_t gsparams = new gsParamState_t();
int format = (gsConstants.DISPLAY_COLORS_RGB |
gsConstants.DISPLAY_DEPTH_8 |
gsConstants.DISPLAY_LITTLEENDIAN);
int resolution = (int)(72.0 * zoom + 0.5);
gsparams.args = new List <string>();
gsparams.args.Add("gs");
gsparams.args.Add("-dNOPAUSE");
gsparams.args.Add("-dBATCH");
gsparams.args.Add("-I%rom%Resource/Init/");
gsparams.args.Add("-dSAFER");
gsparams.args.Add("-r" + resolution);
gsparams.args.Add("-sDEVICE=display");
gsparams.args.Add("-dDisplayFormat=" + format);
gsparams.args.Add("-dFirstPage=" + first_page);
gsparams.args.Add("-dLastPage=" + last_page);
gsparams.args.Add("-f");
gsparams.args.Add(fileName);
gsparams.task = GS_Task_t.DISPLAY_DEV_PDF;
gsparams.currpage = first_page - 1;
return(RunGhostscriptAsync(gsparams));
}
/* Launch a thread rendering all the pages with the display device
* to collect thumbnail images or full resolution. */
public gsStatus gsDisplayDeviceRenderAll(String fileName, double zoom, bool aa, GS_Task_t task)
{
gsParamState_t gsparams = new gsParamState_t();
int format = (gsConstants.DISPLAY_COLORS_RGB |
gsConstants.DISPLAY_DEPTH_8 |
gsConstants.DISPLAY_LITTLEENDIAN);
int resolution = (int)(72.0 * zoom + 0.5);
gsparams.args = new List <string>();
gsparams.args.Add("gs");
gsparams.args.Add("-dNOPAUSE");
gsparams.args.Add("-dBATCH");
gsparams.args.Add("-I%rom%Resource/Init/");
gsparams.args.Add("-dSAFER");
gsparams.args.Add("-r" + resolution);
if (aa)
{
gsparams.args.Add("-dTextAlphaBits=4");
gsparams.args.Add("-dGraphicsAlphaBits=4");
}
gsparams.args.Add("-sDEVICE=display");
gsparams.args.Add("-dDisplayFormat=" + format);
gsparams.args.Add("-f");
gsparams.args.Add(fileName);
gsparams.task = task;
gsparams.currpage = 0;
return(RunGhostscriptAsync(gsparams));
}
/* Use syncronous call to ghostscript to get the
* number of pages in a PDF file */
public int GetPageCount(String fileName)
{
gsParamState_t gsparams = new gsParamState_t();
gsParamState_t result;
gsparams.args = new List <string>();
gsparams.args.Add("gs");
gsparams.args.Add("-dNODISPLAY");
gsparams.args.Add("-dNOPAUSE");
gsparams.args.Add("-dBATCH");
gsparams.args.Add("-I%rom%Resource/Init/");
//gsparams.args.Add("-q");
gsparams.args.Add("-sFile=\"" + fileName + "\"");
gsparams.args.Add("--permit-file-read=\"" + fileName + "\"");
gsparams.args.Add("-c");
gsparams.args.Add("\"File (r) file runpdfbegin pdfpagecount = quit\"");
gsparams.task = GS_Task_t.GET_PAGE_COUNT;
m_params = gsparams;
result = gsFileSync(gsparams);
if (result.result == GS_Result_t.gsOK)
{
return(m_params.num_pages);
}
else
{
return(-1);
}
}
/* Callback as worker progresses */
private void gsProgressChanged(object sender, ProgressChangedEventArgs e)
{
/* Callback with progress */
gsParamState_t Value = new gsParamState_t();
gsEventArgs info = new gsEventArgs(false, e.ProgressPercentage, Value);
gsUpdateMain(info);
}
/* Launch a thread to create XPS document for windows printing */
public gsStatus CreateXPS(String fileName, int resolution, int num_pages,
Print printsettings, int firstpage, int lastpage)
{
gsParamState_t gsparams = new gsParamState_t();
gsparams.args = new List <string>();
gsparams.inputfile = fileName;
gsparams.args.Add("gs");
gsparams.args.Add("-dNOPAUSE");
gsparams.args.Add("-dBATCH");
gsparams.args.Add("-I%rom%Resource/Init/");
gsparams.args.Add("-dSAFER");
gsparams.args.Add("-r" + resolution.ToString());
gsparams.args.Add("-dNOCACHE");
gsparams.args.Add("-sDEVICE=xpswrite");
gsparams.args.Add("-dFirstPage=" + firstpage.ToString());
gsparams.args.Add("-dLastPage=" + lastpage.ToString());
if (printsettings != null)
{
double paperheight;
double paperwidth;
if (printsettings.m_pagedetails.Landscape == true)
{
paperheight = printsettings.m_pagedetails.PrintableArea.Width;
paperwidth = printsettings.m_pagedetails.PrintableArea.Height;
}
else
{
paperheight = printsettings.m_pagedetails.PrintableArea.Height;
paperwidth = printsettings.m_pagedetails.PrintableArea.Width;
}
double width = paperwidth * 72.0 / 100.0;
double height = paperheight * 72.0 / 100.0;
gsparams.args.Add("-dDEVICEWIDTHPOINTS=" + width);
gsparams.args.Add("-dDEVICEHEIGHTPOINTS=" + height);
gsparams.args.Add("-dFIXEDMEDIA");
/* Scale and translate and rotate if needed */
if (printsettings.xaml_autofit.IsChecked == true)
{
gsparams.args.Add("-dFitPage");
}
}
gsparams.outputfile = Path.GetTempFileName();
gsparams.args.Add("-o");
gsparams.args.Add(gsparams.outputfile);
gsparams.args.Add("-f");
gsparams.args.Add(fileName);
gsparams.task = GS_Task_t.CREATE_XPS;
return(RunGhostscriptAsync(gsparams));
}
/* Call the appropriate worker thread based upon the task
* that we have to do */
private gsStatus RunGhostscriptAsync(gsParamState_t Params)
{
try
{
if (m_worker != null && m_worker.IsBusy)
{
m_worker.CancelAsync();
return(gsStatus.GS_BUSY);
}
if (m_worker == null)
{
m_worker = new BackgroundWorker();
m_worker.WorkerReportsProgress = true;
m_worker.WorkerSupportsCancellation = true;
m_worker.RunWorkerCompleted += new RunWorkerCompletedEventHandler(gsCompleted);
m_worker.ProgressChanged += new ProgressChangedEventHandler(gsProgressChanged);
}
switch (Params.task)
{
case GS_Task_t.PS_DISTILL:
m_worker.DoWork += new DoWorkEventHandler(gsBytesAsync);
break;
case GS_Task_t.DISPLAY_DEV_NON_PDF:
case GS_Task_t.DISPLAY_DEV_PDF:
case GS_Task_t.DISPLAY_DEV_THUMBS_NON_PDF:
case GS_Task_t.DISPLAY_DEV_THUMBS_PDF:
m_worker.DoWork += new DoWorkEventHandler(DisplayDeviceAsync);
break;
case GS_Task_t.SAVE_RESULT:
case GS_Task_t.CREATE_XPS:
default:
m_worker.DoWork += new DoWorkEventHandler(gsFileAsync);
break;
}
m_params = Params;
m_worker.RunWorkerAsync(Params);
return(gsStatus.GS_READY);
}
catch (OutOfMemoryException)
{
Console.WriteLine("Memory allocation failed during gs rendering\n");
return(gsStatus.GS_ERROR);
}
}
/* Launch a thread rendering all the pages with the display device
* to distill an input PS file and save as a PDF. */
public gsStatus DistillPS(String fileName, int resolution)
{
gsParamState_t gsparams = new gsParamState_t();
gsparams.args = new List <string>();
gsparams.inputfile = fileName;
gsparams.args.Add("gs");
gsparams.args.Add("-dNOPAUSE");
gsparams.args.Add("-dBATCH");
gsparams.args.Add("-I%rom%Resource/Init/");
gsparams.args.Add("-dSAFER");
gsparams.args.Add("-sDEVICE=pdfwrite");
gsparams.outputfile = Path.GetTempFileName();
gsparams.args.Add("-o" + gsparams.outputfile);
gsparams.task = GS_Task_t.PS_DISTILL;
return(RunGhostscriptAsync(gsparams));
}
/* Worker task for using display device */
private void DisplayDeviceAsync(object sender, DoWorkEventArgs e)
{
int code = 0;
gsParamState_t gsparams = (gsParamState_t)e.Argument;
GCHandle argPtrsStable = new GCHandle();
int num_params = gsparams.args.Count;
var argParam = new GCHandle[num_params];
var argPtrs = new IntPtr[num_params];
List <byte[]> CharacterArray = new List <byte[]>(num_params);
bool cleanup = true;
gsparams.result = GS_Result_t.gsOK;
try
{
code = ghostapi.gsapi_new_instance(out dispInstance, IntPtr.Zero);
if (code < 0)
{
throw new GhostscriptException("DisplayDeviceAsync: gsapi_new_instance error");
}
code = ghostapi.gsapi_set_stdio(dispInstance, stdin_callback, stdout_callback, stderr_callback);
if (code < 0)
{
throw new GhostscriptException("DisplayDeviceAsync: gsapi_set_stdio error");
}
code = ghostapi.gsapi_set_arg_encoding(dispInstance, (int)gsEncoding.GS_ARG_ENCODING_UTF8);
if (code < 0)
{
throw new GhostscriptException("DisplayDeviceAsync: gsapi_set_arg_encoding error");
}
code = ghostapi.gsapi_set_display_callback(dispInstance, ptr_display_struct);
if (code < 0)
{
throw new GhostscriptException("DisplayDeviceAsync: gsapi_set_display_callback error");
}
String fullcommand = "";
for (int k = 0; k < num_params; k++)
{
CharacterArray.Add(System.Text.Encoding.UTF8.GetBytes((gsparams.args[k] + "\0").ToCharArray()));
argParam[k] = GCHandle.Alloc(CharacterArray[k], GCHandleType.Pinned);
argPtrs[k] = argParam[k].AddrOfPinnedObject();
fullcommand = fullcommand + " " + gsparams.args[k];
}
argPtrsStable = GCHandle.Alloc(argPtrs, GCHandleType.Pinned);
fullcommand = "Command Line: " + fullcommand + "\n";
gsIOUpdateMain(fullcommand, fullcommand.Length);
code = ghostapi.gsapi_init_with_args(dispInstance, num_params, argPtrsStable.AddrOfPinnedObject());
if (code < 0)
{
throw new GhostscriptException("DisplayDeviceAsync: gsapi_init_with_args error");
}
}
catch (DllNotFoundException except)
{
gsDLLProblemMain("Exception: " + except.Message);
gsparams.result = GS_Result_t.gsFAILED;
cleanup = false;
e.Result = gsparams;
}
catch (BadImageFormatException except)
{
gsDLLProblemMain("Exception: " + except.Message);
gsparams.result = GS_Result_t.gsFAILED;
cleanup = false;
e.Result = gsparams;
}
catch (GhostscriptException except)
{
gsDLLProblemMain("Exception: " + except.Message);
gsparams.result = GS_Result_t.gsFAILED;
if (dispInstance != IntPtr.Zero)
{
ghostapi.gsapi_delete_instance(dispInstance);
}
dispInstance = IntPtr.Zero;
}
catch (Exception except)
{
gsDLLProblemMain("Exception: " + except.Message);
gsparams.result = GS_Result_t.gsFAILED;
if (dispInstance != IntPtr.Zero)
{
ghostapi.gsapi_delete_instance(dispInstance);
}
dispInstance = IntPtr.Zero;
}
finally
{
if (cleanup)
{
for (int k = 0; k < num_params; k++)
{
argParam[k].Free();
}
argPtrsStable.Free();
e.Result = gsparams;
if (gsparams.result == GS_Result_t.gsOK && (gsparams.task == GS_Task_t.DISPLAY_DEV_NON_PDF ||
gsparams.task == GS_Task_t.DISPLAY_DEV_THUMBS_NON_PDF))
{
gsParamState_t result = DisplayDeviceClose();
if (gsparams.result == 0)
{
gsparams.result = result.result;
}
}
}
}
return;
}
public gsEventArgs(bool completed, int progress, gsParamState_t param)
{
m_completed = completed;
m_progress = progress;
m_param = param;
}
/* Processing with gsapi_run_string for callback progress */
private void gsBytesAsync(object sender, DoWorkEventArgs e)
{
gsParamState_t Params = (gsParamState_t)e.Argument;
int num_params = Params.args.Count;
var argParam = new GCHandle[num_params];
var argPtrs = new IntPtr[num_params];
List <byte[]> CharacterArray = new List <byte[]>(num_params);
GCHandle argPtrsStable = new GCHandle();
Byte[] Buffer = new Byte[gsConstants.GS_READ_BUFFER];
BackgroundWorker worker = sender as BackgroundWorker;
int code = 0;
int exitcode = 0;
var Feed = new GCHandle();
var FeedPtr = new IntPtr();
String[] strParams = new String[num_params];
FileStream fs = null;
bool cleanup = true;
try
{
/* Open the file */
fs = new FileStream(Params.inputfile, FileMode.Open);
var len = (int)fs.Length;
code = ghostapi.gsapi_new_instance(out gsInstance, IntPtr.Zero);
if (code < 0)
{
throw new GhostscriptException("gsBytesAsync: gsapi_new_instance error");
}
code = ghostapi.gsapi_set_stdio(gsInstance, stdin_callback, stdout_callback, stderr_callback);
if (code < 0)
{
throw new GhostscriptException("gsBytesAsync: gsapi_set_stdio error");
}
code = ghostapi.gsapi_set_arg_encoding(gsInstance, (int)gsEncoding.GS_ARG_ENCODING_UTF8);
if (code < 0)
{
throw new GhostscriptException("gsBytesAsync: gsapi_set_arg_encoding error");
}
/* Now convert our Strings to char* and get pinned handles to these.
* This keeps the c# GC from moving stuff around on us */
String fullcommand = "";
for (int k = 0; k < num_params; k++)
{
CharacterArray.Add(System.Text.Encoding.UTF8.GetBytes((Params.args[k] + "\0").ToCharArray()));
argParam[k] = GCHandle.Alloc(CharacterArray[k], GCHandleType.Pinned);
argPtrs[k] = argParam[k].AddrOfPinnedObject();
fullcommand = fullcommand + " " + Params.args[k];
}
/* Also stick the array of pointers into memory that will not be GCd */
argPtrsStable = GCHandle.Alloc(argPtrs, GCHandleType.Pinned);
fullcommand = "Command Line: " + fullcommand + "\n";
gsIOUpdateMain(fullcommand, fullcommand.Length);
code = ghostapi.gsapi_init_with_args(gsInstance, num_params, argPtrsStable.AddrOfPinnedObject());
if (code < 0)
{
throw new GhostscriptException("gsBytesAsync: gsapi_init_with_args error");
}
/* Pin data buffer */
Feed = GCHandle.Alloc(Buffer, GCHandleType.Pinned);
FeedPtr = Feed.AddrOfPinnedObject();
/* Now start feeding the input piece meal and do a call back
* with our progress */
if (code == 0)
{
int count;
double perc;
int total = 0;
int ret_code;
ret_code = ghostapi.gsapi_run_string_begin(gsInstance, 0, ref exitcode);
if (exitcode < 0)
{
code = exitcode;
throw new GhostscriptException("gsBytesAsync: gsapi_run_string_begin error");
}
while ((count = fs.Read(Buffer, 0, gsConstants.GS_READ_BUFFER)) > 0)
{
ret_code = ghostapi.gsapi_run_string_continue(gsInstance, FeedPtr, count, 0, ref exitcode);
if (exitcode < 0)
{
code = exitcode;
throw new GhostscriptException("gsBytesAsync: gsapi_run_string_continue error");
}
total = total + count;
perc = 100.0 * (double)total / (double)len;
worker.ReportProgress((int)perc);
if (worker.CancellationPending == true)
{
e.Cancel = true;
break;
}
}
ret_code = ghostapi.gsapi_run_string_end(gsInstance, 0, ref exitcode);
if (exitcode < 0)
{
code = exitcode;
throw new GhostscriptException("gsBytesAsync: gsapi_run_string_end error");
}
}
}
catch (DllNotFoundException except)
{
gsDLLProblemMain("Exception: " + except.Message);
Params.result = GS_Result_t.gsFAILED;
cleanup = false;
e.Result = Params;
}
catch (BadImageFormatException except)
{
gsDLLProblemMain("Exception: " + except.Message);
Params.result = GS_Result_t.gsFAILED;
cleanup = false;
e.Result = Params;
}
catch (GhostscriptException except)
{
gsDLLProblemMain("Exception: " + except.Message);
}
catch (Exception except)
{
/* Could be a file io issue */
gsDLLProblemMain("Exception: " + except.Message);
Params.result = GS_Result_t.gsFAILED;
cleanup = false;
e.Result = Params;
}
finally
{
if (cleanup)
{
fs.Close();
/* Free pinned items */
for (int k = 0; k < num_params; k++)
{
argParam[k].Free();
}
argPtrsStable.Free();
Feed.Free();
/* gs clean up */
int code1 = ghostapi.gsapi_exit(gsInstance);
if ((code == 0) || (code == gsConstants.E_QUIT))
{
code = code1;
}
ghostapi.gsapi_delete_instance(gsInstance);
Params.return_code = code;
if ((code == 0) || (code == gsConstants.E_QUIT))
{
Params.result = GS_Result_t.gsOK;
e.Result = Params;
}
else
{
Params.result = GS_Result_t.gsFAILED;
e.Result = Params;
}
gsInstance = IntPtr.Zero;
}
}
return;
}
/* Process command line with gsapi_init_with_args */
private void gsFileAsync(object sender, DoWorkEventArgs e)
{
gsParamState_t Params = (gsParamState_t)e.Argument;
int num_params = Params.args.Count;
var argParam = new GCHandle[num_params];
var argPtrs = new IntPtr[num_params];
List <byte[]> CharacterArray = new List <byte[]>(num_params);
GCHandle argPtrsStable = new GCHandle();
int code = 0;
bool cleanup = true;
try
{
code = ghostapi.gsapi_new_instance(out gsInstance, IntPtr.Zero);
if (code < 0)
{
throw new GhostscriptException("gsFileAsync: gsapi_new_instance error");
}
code = ghostapi.gsapi_set_stdio(gsInstance, stdin_callback, stdout_callback, stderr_callback);
if (code < 0)
{
throw new GhostscriptException("gsFileAsync: gsapi_set_stdio error");
}
code = ghostapi.gsapi_set_arg_encoding(gsInstance, (int)gsEncoding.GS_ARG_ENCODING_UTF8);
if (code < 0)
{
throw new GhostscriptException("gsFileAsync: gsapi_set_arg_encoding error");
}
/* Now convert our Strings to char* and get pinned handles to these.
* This keeps the c# GC from moving stuff around on us */
String fullcommand = "";
for (int k = 0; k < num_params; k++)
{
CharacterArray.Add(System.Text.Encoding.UTF8.GetBytes((Params.args[k] + "\0").ToCharArray()));
argParam[k] = GCHandle.Alloc(CharacterArray[k], GCHandleType.Pinned);
argPtrs[k] = argParam[k].AddrOfPinnedObject();
fullcommand = fullcommand + " " + Params.args[k];
}
/* Also stick the array of pointers into memory that will not be GCd */
argPtrsStable = GCHandle.Alloc(argPtrs, GCHandleType.Pinned);
fullcommand = "Command Line: " + fullcommand + "\n";
gsIOUpdateMain(fullcommand, fullcommand.Length);
code = ghostapi.gsapi_init_with_args(gsInstance, num_params, argPtrsStable.AddrOfPinnedObject());
if (code < 0)
{
throw new GhostscriptException("gsFileAsync: gsapi_init_with_args error");
}
}
catch (DllNotFoundException except)
{
gsDLLProblemMain("Exception: " + except.Message);
Params.result = GS_Result_t.gsFAILED;
cleanup = false;
e.Result = Params;
}
catch (BadImageFormatException except)
{
gsDLLProblemMain("Exception: " + except.Message);
Params.result = GS_Result_t.gsFAILED;
cleanup = false;
e.Result = Params;
}
catch (GhostscriptException except)
{
gsDLLProblemMain("Exception: " + except.Message);
}
catch (Exception except)
{
gsDLLProblemMain("Exception: " + except.Message);
}
finally
{
if (cleanup)
{
/* All the pinned items need to be freed so the GC can do its job */
for (int k = 0; k < num_params; k++)
{
argParam[k].Free();
}
argPtrsStable.Free();
int code1 = ghostapi.gsapi_exit(gsInstance);
if ((code == 0) || (code == gsConstants.E_QUIT))
{
code = code1;
}
ghostapi.gsapi_delete_instance(gsInstance);
Params.return_code = code;
if ((code == 0) || (code == gsConstants.E_QUIT))
{
Params.result = GS_Result_t.gsOK;
e.Result = Params;
}
else
{
Params.result = GS_Result_t.gsFAILED;
e.Result = Params;
}
gsInstance = IntPtr.Zero;
}
}
return;
}
/* Callback upon worker all done */
private void gsCompleted(object sender, RunWorkerCompletedEventArgs e)
{
gsParamState_t Value;
gsEventArgs info;
gsParamState_t Params;
try
{
Params = (gsParamState_t)e.Result;
}
catch (System.Reflection.TargetInvocationException)
{
/* Something went VERY wrong with GS */
/* Following is to help debug these issues */
/* var inner = ee.InnerException;
* var message = ee.Message;
* var inner_message = inner.Message;
* String bound = "\n************\n";
* gsIOUpdateMain(this, bound, bound.Length);
* gsIOUpdateMain(this, message, message.Length);
* gsIOUpdateMain(this, bound, bound.Length);
* gsIOUpdateMain(this, inner_message, inner_message.Length);
* gsIOUpdateMain(this, bound, bound.Length);
* var temp = inner.Source;
* gsIOUpdateMain(this, bound, bound.Length);
* gsIOUpdateMain(this, temp, temp.Length);
* var method = inner.TargetSite;
* gsIOUpdateMain(this, bound, bound.Length);
* var method_name = method.Name;
* gsIOUpdateMain(this, method_name, method_name.Length);
* var stack = inner.StackTrace;
* gsIOUpdateMain(this, bound, bound.Length);
* gsIOUpdateMain(this, stack, stack.Length); */
String output = "Ghostscript DLL Invalid Access.";
gsDLLProblemMain(output);
return;
}
switch (Params.task)
{
case GS_Task_t.PS_DISTILL:
m_worker.DoWork -= new DoWorkEventHandler(gsBytesAsync);
break;
case GS_Task_t.DISPLAY_DEV_NON_PDF:
case GS_Task_t.DISPLAY_DEV_PDF:
case GS_Task_t.DISPLAY_DEV_THUMBS_NON_PDF:
case GS_Task_t.DISPLAY_DEV_THUMBS_PDF:
m_worker.DoWork -= new DoWorkEventHandler(DisplayDeviceAsync);
break;
default:
m_worker.DoWork -= new DoWorkEventHandler(gsFileAsync);
break;
}
if (e.Cancelled)
{
Value = new gsParamState_t();
Value.result = GS_Result_t.gsCANCELLED;
info = new gsEventArgs(true, 100, Value);
}
else
{
Value = (gsParamState_t)e.Result;
info = new gsEventArgs(true, 100, Value);
}
gsUpdateMain(info);
}
