/// <summary>
/// Releases all resources used by the Ghostscript.NET.GhostscriptInterpreter instance.
/// </summary>
protected virtual void Dispose(bool disposing)
{
if (!_disposed)
{
if (disposing)
{
// GSAPI: exit the interpreter
_gs.gsapi_exit(_gs_instance);
// GSAPI: destroy an instance of Ghostscript
_gs.gsapi_delete_instance(_gs_instance);
// release all resource used by Ghostscript library
_gs.Dispose();
}
// check if the display device callback handler is attached
if (_displayDevice_callback_handle != IntPtr.Zero)
{
// free earlier allocated memory used for the display device callback
Marshal.FreeCoTaskMem(_displayDevice_callback_handle);
}
_disposed = true;
}
}
/// <summary>
/// Run Ghostscript.
/// </summary>
/// <param name="args">Command arguments</param>
/// <param name="stdIO_callback">StdIO callback, can be set to null if you dont want to handle it.</param>
public void Process(string[] args, GhostscriptStdIO stdIO_callback)
{
IntPtr instance = IntPtr.Zero;
int rc_ins = _gs.gsapi_new_instance(out instance, IntPtr.Zero);
if (ierrors.IsError(rc_ins))
{
throw new GhostscriptAPICallException("gsapi_new_instance", rc_ins);
}
try
{
_stdIO_Callback = stdIO_callback;
_internalStdIO_Callback = new GhostscriptProcessorInternalStdIOHandler(
new StdInputEventHandler(OnStdIoInput),
new StdOutputEventHandler(OnStdIoOutput),
new StdErrorEventHandler(OnStdIoError));
int rc_stdio = _gs.gsapi_set_stdio(instance,
_internalStdIO_Callback._std_in,
_internalStdIO_Callback._std_out,
_internalStdIO_Callback._std_err);
if (ierrors.IsError(rc_stdio))
{
throw new GhostscriptAPICallException("gsapi_set_stdio", rc_stdio);
}
int rc_init = _gs.gsapi_init_with_args(instance, args.Length, args);
if (ierrors.IsErrorIgnoreQuit(rc_init))
{
throw new GhostscriptAPICallException("gsapi_init_with_args", rc_init);
}
int rc_exit = _gs.gsapi_exit(instance);
if (ierrors.IsErrorIgnoreQuit(rc_exit))
{
throw new GhostscriptAPICallException("gsapi_exit", rc_exit);
}
}
finally
{
_gs.gsapi_delete_instance(instance);
}
}
protected virtual void Dispose(bool disposing)
{
if (!_disposed)
{
if (disposing)
{
_gs.gsapi_exit(_gs_instance);
_gs.gsapi_delete_instance(_gs_instance);
_gs.Dispose();
}
if (_displayDevice_callback_handle != IntPtr.Zero)
{
Marshal.FreeCoTaskMem(_displayDevice_callback_handle);
}
_disposed = true;
}
}
/// <summary>
/// Run Ghostscript.
/// </summary>
/// <param name="args">Command arguments</param>
/// <param name="stdIO_callback">StdIO callback, can be set to null if you dont want to handle it.</param>
public void StartProcessing(string[] args, GhostscriptStdIO stdIO_callback)
{
if (args == null)
{
throw new ArgumentNullException("args");
}
if (args.Length < 3)
{
throw new ArgumentOutOfRangeException("args");
}
for (int i = 0; i < args.Length; i++)
{
args[i] = System.Text.Encoding.Default.GetString(System.Text.Encoding.UTF8.GetBytes(args[i]));
}
_isRunning = true;
IntPtr instance = IntPtr.Zero;
int rc_ins = _gs.gsapi_new_instance(out instance, IntPtr.Zero);
if (ierrors.IsError(rc_ins))
{
throw new GhostscriptAPICallException("gsapi_new_instance", rc_ins);
}
try
{
_stdIO_Callback = stdIO_callback;
_internalStdIO_Callback = new GhostscriptProcessorInternalStdIOHandler(
new StdInputEventHandler(OnStdIoInput),
new StdOutputEventHandler(OnStdIoOutput),
new StdErrorEventHandler(OnStdIoError));
int rc_stdio = _gs.gsapi_set_stdio(instance,
_internalStdIO_Callback._std_in,
_internalStdIO_Callback._std_out,
_internalStdIO_Callback._std_err);
_poolCallBack = new gsapi_pool_callback(Pool);
int rc_pool = _gs.gsapi_set_poll(instance, _poolCallBack);
if (ierrors.IsError(rc_pool))
{
throw new GhostscriptAPICallException("gsapi_set_poll", rc_pool);
}
if (ierrors.IsError(rc_stdio))
{
throw new GhostscriptAPICallException("gsapi_set_stdio", rc_stdio);
}
this.OnStarted(new GhostscriptProcessorEventArgs());
_stopProcessing = false;
if (_gs.is_gsapi_set_arg_encoding_supported)
{
int rc_enc = _gs.gsapi_set_arg_encoding(instance, GS_ARG_ENCODING.UTF8);
}
int rc_init = _gs.gsapi_init_with_args(instance, args.Length, args);
if (ierrors.IsErrorIgnoreQuit(rc_init))
{
if (!ierrors.IsInterrupt(rc_init))
{
throw new GhostscriptAPICallException("gsapi_init_with_args", rc_init);
}
}
int rc_exit = _gs.gsapi_exit(instance);
if (ierrors.IsErrorIgnoreQuit(rc_exit))
{
throw new GhostscriptAPICallException("gsapi_exit", rc_exit);
}
}
finally
{
_gs.gsapi_delete_instance(instance);
GC.Collect();
_isRunning = false;
this.OnCompleted(new GhostscriptProcessorEventArgs());
}
}
/// <summary>
/// Run Ghostscript.
/// </summary>
/// <param name="args">Command arguments</param>
/// <param name="stdIO_callback">StdIO callback, can be set to null if you dont want to handle it.</param>
public void StartProcessing(string[] args, GhostscriptStdIO stdIO_callback = null)
{
if (args == null)
{
throw new ArgumentNullException("args");
}
if (args.Length < 3)
{
throw new ArgumentOutOfRangeException("args");
}
for (int i = 0; i < args.Length; i++)
{
args[i] = System.Text.Encoding.Default.GetString(System.Text.Encoding.UTF8.GetBytes(args[i]));
}
_isRunning = true;
IntPtr instance = IntPtr.Zero;
int rc_ins = _gs.gsapi_new_instance(out instance, IntPtr.Zero);
if (ierrors.IsError(rc_ins))
{
throw new GhostscriptAPICallException("gsapi_new_instance", rc_ins, _internalStdIO_Callback);
}
try
{
_stdIO_Callback = stdIO_callback;
_internalStdIO_Callback = new GhostscriptProcessorInternalStdIOHandler(
new StdInputEventHandler(OnStdIoInput),
new StdOutputEventHandler(OnStdIoOutput),
new StdErrorEventHandler(OnStdIoError));
int rc_stdio = _gs.gsapi_set_stdio(instance,
_internalStdIO_Callback._std_in,
_internalStdIO_Callback._std_out,
_internalStdIO_Callback._std_err);
_poolCallBack = new gsapi_pool_callback(Pool);
int rc_pool = _gs.gsapi_set_poll(instance, _poolCallBack);
if (ierrors.IsError(rc_pool))
{
throw new GhostscriptAPICallException("gsapi_set_poll", rc_pool, _internalStdIO_Callback);
}
if (ierrors.IsError(rc_stdio))
{
throw new GhostscriptAPICallException("gsapi_set_stdio", rc_stdio, _internalStdIO_Callback);
}
this.OnStarted(new GhostscriptProcessorEventArgs());
_stopProcessing = false;
if (_gs.is_gsapi_set_arg_encoding_supported)
{
int rc_enc = _gs.gsapi_set_arg_encoding(instance, GS_ARG_ENCODING.UTF8);
}
int rc_init = _gs.gsapi_init_with_args(instance, args.Length, args);
if (ierrors.IsErrorIgnoreQuit(rc_init))
{
if (!ierrors.IsInterrupt(rc_init))
{
throw new GhostscriptAPICallException("gsapi_init_with_args", rc_init, _internalStdIO_Callback);
}
}
}
finally
{
// gsapi_exit() :
//
// Exit the interpreter. This MUST be called on shutdown if gsapi_init_with_args() has been called, and just before gsapi_delete_instance().
//
// ^^^ that's from the docs at https://ghostscript.com/doc/9.52/API.htm#exit (emphasis mine): it's placed in the `finally` clause
// section here to ensure it is called when rc_init == e_Fatal (or other error) occurs and throws an exception in the code chunk above.
try
{
int rc_exit = _gs.gsapi_exit(instance);
if (ierrors.IsErrorIgnoreQuit(rc_exit))
{
throw new GhostscriptAPICallException("gsapi_exit", rc_exit, _internalStdIO_Callback);
}
}
finally
{
_gs.gsapi_delete_instance(instance);
GC.Collect();
_isRunning = false;
this.OnCompleted(new GhostscriptProcessorEventArgs());
}
}
}
