/// <summary>
/// Sets the stdio and display device callback handlers.
/// </summary>
/// <param name="stdIO">Stdio callback handler.</param>
/// <param name="displayDevice">DisplayDevice callback handler.</param>
public void Setup(GhostscriptStdIO stdIO, GhostscriptDisplayDeviceHandler displayDevice)
{
// check if we need to set stdio handler
if (stdIO != null)
{
// check if stdio handler is not already set
if (_stdIO == null)
{
// GSAPI: set the stdio callback handlers
int rc_stdio = _gs.gsapi_set_stdio(_gs_instance,
stdIO != null ? stdIO._std_in : null,
stdIO != null ? stdIO._std_out : null,
stdIO != null ? stdIO._std_err : null);
// check if the stdio callback handlers are set correctly
if (ierrors.IsError(rc_stdio))
{
throw new GhostscriptAPICallException("gsapi_set_stdio", rc_stdio);
}
// remember it
_stdIO = stdIO;
}
else
{
throw new GhostscriptException("StdIO callback handler is already set.");
}
}
// check if a custom display device needs to be used
if (displayDevice != null)
{
// check if display device is already set
if (_displayDevice == null)
{
// allocate a memory for the display device callback handler
_displayDevice_callback_handle = Marshal.AllocCoTaskMem(displayDevice._callback.size);
// copy display device callback structure content to the pre-allocated block of memory
Marshal.StructureToPtr(displayDevice._callback, _displayDevice_callback_handle, true);
// GSAPI: set the display device callback handler
int rc_dev = _gs.gsapi_set_display_callback(_gs_instance, _displayDevice_callback_handle);
// check if the display callback handler is set correctly
if (ierrors.IsError(rc_dev))
{
throw new GhostscriptAPICallException("gsapi_set_display_callback", rc_dev);
}
// remember it
_displayDevice = displayDevice;
}
else
{
throw new GhostscriptException("DisplayDevice callback is already set!");
}
}
}
public void Setup(GhostscriptStdIO stdIO, GhostscriptDisplayDevice displayDevice)
{
if (stdIO != null)
{
if (_stdIO == null)
{
int rc_stdio = _gs.gsapi_set_stdio(_gs_instance,
stdIO != null ? stdIO._std_in : null,
stdIO != null ? stdIO._std_out : null,
stdIO != null ? stdIO._std_err : null);
if (ierrors.IsError(rc_stdio))
{
throw new GhostscriptAPICallException("gsapi_set_stdio", rc_stdio);
}
_stdIO = stdIO;
}
else
{
throw new GhostscriptException("StdIO callback is already set!");
}
}
if (displayDevice != null)
{
if (_displayDevice == null)
{
_displayDevice_callback_handle = Marshal.AllocCoTaskMem(displayDevice._callback.size);
Marshal.StructureToPtr(displayDevice._callback, _displayDevice_callback_handle, true);
int rc_dev = _gs.gsapi_set_display_callback(_gs_instance, _displayDevice_callback_handle);
if (ierrors.IsError(rc_dev))
{
throw new GhostscriptAPICallException("gsapi_set_display_callback", rc_dev);
}
_displayDevice = displayDevice;
}
else
{
throw new GhostscriptException("DisplayDevice callback is already set!");
}
}
}
