private byte[] _Convert()
{
var converter = IntPtr.Zero;
var errorCb = new NativeCalls.wkhtmltoimage_str_callback(OnError);
var warnCb = new NativeCalls.wkhtmltoimage_str_callback(OnWarning);
var phaseCb = new NativeCalls.wkhtmltoimage_void_callback(OnPhaseChanged);
var progressCb = new NativeCalls.wkhtmltoimage_int_callback(OnProgressChanged);
var finishCb = new NativeCalls.wkhtmltoimage_bool_callback(OnFinished);
try
{
var gSettings = _BuildGlobalSettings();
converter = _BuildConverter(gSettings);
_errorString = new StringBuilder();
NativeCalls.wkhtmltoimage_set_error_callback(converter, errorCb);
NativeCalls.wkhtmltoimage_set_warning_callback(converter, warnCb);
NativeCalls.wkhtmltoimage_set_phase_changed_callback(converter, phaseCb);
NativeCalls.wkhtmltoimage_set_progress_changed_callback(converter, progressCb);
NativeCalls.wkhtmltoimage_set_finished_callback(converter, finishCb);
OnBegin(NativeCalls.wkhtmltoimage_phase_count(converter));
if (NativeCalls.wkhtmltoimage_convert(converter) == 0)
{
var msg = string.Format("HtmlToPdf conversion failed: {0}", _errorString.ToString());
throw new ConverterException(msg);
}
if (!string.IsNullOrEmpty(GlobalSettings.Out))
{
return(null);
}
_Log.Debug("CONVERSION DONE.. getting output.");
// Get output from internal buffer..
IntPtr tmp = IntPtr.Zero;
var ret = NativeCalls.wkhtmltoimage_get_output(converter, out tmp);
var output = new byte[ret.ToInt32()];
Marshal.Copy(tmp, output, 0, output.Length);
return(output);
}
finally
{
if (converter != IntPtr.Zero)
{
NativeCalls.wkhtmltoimage_set_error_callback(converter, null);
NativeCalls.wkhtmltoimage_set_warning_callback(converter, null);
NativeCalls.wkhtmltoimage_set_phase_changed_callback(converter, null);
NativeCalls.wkhtmltoimage_set_progress_changed_callback(converter, null);
NativeCalls.wkhtmltoimage_set_finished_callback(converter, null);
NativeCalls.wkhtmltoimage_destroy_converter(converter);
converter = IntPtr.Zero;
}
}
}
private IntPtr _BuildConverter(IntPtr globalSettings)
{
var converter = NativeCalls.wkhtmltoimage_create_converter(globalSettings, null);
return(converter);
}