public static MemoryStream RenderPage_AsMemoryStream(string pdf_filename, int page_number, int dpi, string device, ProcessPriorityClass priority_class)
{
// STDOUT/STDERR
string ghostscript_parameters = GhostscriptBinaries.GenerateGhostscriptParameters(pdf_filename, device, dpi, page_number, 0, @"-");
using (Process process = GhostscriptBinaries.StartGhostscriptProcess(ghostscript_parameters, priority_class))
{
Logging.Info("Process started!");
// Read image from stdout
using (ProcessOutputReader process_output_reader = new ProcessOutputReader(process, stdout_is_binary: true))
{
using (StreamReader sr = process.StandardOutput)
{
using (FileStream fs = (FileStream)sr.BaseStream)
{
MemoryStream ms = new MemoryStream(128 * 1024);
int total_size = StreamToFile.CopyStreamToStream(fs, ms);
Logging.Debug特("Image size was {0} for PDF file {1}, page {2} @ dpi {3}", total_size, pdf_filename, page_number, dpi);
// Check that the process has exited properly
process.WaitForExit(1000);
if (!process.HasExited)
{
Logging.Error("Ghostscript process did not terminate.\n{0}", process_output_reader.GetOutputsDumpString());
}
return(ms);
}
}
}
}
}
public static MemoryStream RenderPage_AsMemoryStream(string pdf_filename, int page_number, int dpi, string device, ProcessPriorityClass priority_class)
{
// STDOUT/STDERR
string ghostscript_parameters = GhostscriptBinaries.GenerateGhostscriptParameters(pdf_filename, device, dpi, page_number, 0, @"-");
using (Process process = GhostscriptBinaries.StartGhostscriptProcess(ghostscript_parameters, priority_class))
{
Logging.Info("Process started!");
// Read image from stdout
using (ProcessOutputReader process_output_reader = new ProcessOutputReader(process, stdout_is_binary: true))
{
using (StreamReader sr = process.StandardOutput)
{
using (FileStream fs = (FileStream)sr.BaseStream)
{
MemoryStream ms = new MemoryStream(128 * 1024);
int total_size = StreamToFile.CopyStreamToStream(fs, ms);
Logging.Debug特("Image size was {0} for PDF file {1}, page {2} @ dpi {3}", total_size, pdf_filename, page_number, dpi);
// Check that the process has exited properly
process.WaitForExit(1000);
bool has_exited = process.HasExited;
if (!has_exited)
{
try
{
process.Kill();
// wait for the completion signal; this also helps to collect all STDERR output of the application (even while it was KILLED)
process.WaitForExit(1000);
}
catch (Exception ex)
{
Logging.Error(ex, "There was a problem killing the GhostScript process after timeout");
}
}
// Check that we had a clean exit
if (!has_exited || 0 != process.ExitCode)
{
Logging.Error("Ghostscript process did not terminate.\n{0}", process_output_reader.GetOutputsDumpString());
}
return(ms);
}
}
}
}
}
public static MemoryStream RenderPage_AsMemoryStream(string pdf_filename, int page_number, int dpi, string device, ProcessPriorityClass priority_class)
{
string ghostscript_parameters = GhostscriptBinaries.GenerateGhostscriptParameters(pdf_filename, device, dpi, page_number, 0, @"-");
Process process = GhostscriptBinaries.StartGhostscriptProcess(ghostscript_parameters, priority_class);
Logging.Info("Process started!");
// Read image from stdout
StreamReader sr = process.StandardOutput;
FileStream fs = (FileStream)sr.BaseStream;
MemoryStream ms = new MemoryStream(128 * 1024);
int total_size = StreamToFile.CopyStreamToStream(fs, ms);
Logging.Debug("Image size was {0}", total_size);
// Check that the process has exited properly
process.WaitForExit(1000);
if (!process.HasExited)
{
Logging.Error("Ghostscript process did not terminate");
}
return(ms);
}
