/// <summary>
/// Process the input PDF file by compressing images and/or by converting color to CMYK. The operations
/// to perform are established by the constructor.
/// </summary>
public void ProcessPdfFile(string inputFile, string outputFile)
{
_inputPdfPath = inputFile;
_outputPdfPath = outputFile;
var exePath = "/usr/bin/gs";
if (SIL.PlatformUtilities.Platform.IsWindows)
{
exePath = FindGhostcriptOnWindows();
}
if (!String.IsNullOrWhiteSpace(exePath) && File.Exists(exePath))
{
if (_worker != null)
{
_worker.ReportProgress(0, GetSpecificStatus());
}
using (var tempPdfFile = TempFile.WithExtension(".pdf"))
{
var runner = new CommandLineRunner();
var arguments = GetArguments(tempPdfFile.Path);
var fromDirectory = String.Empty;
var progress = new NullProgress(); // I can't figure out how to use any IProgress based code, but we show progress okay as is.
var res = runner.Start(exePath, arguments, Encoding.UTF8, fromDirectory, 3600, progress, ProcessGhostcriptReporting);
if (res.DidTimeOut || !RobustFile.Exists(tempPdfFile.Path))
{
if (_inputPdfPath != _outputPdfPath)
{
RobustFile.Copy(_inputPdfPath, _outputPdfPath, true);
}
return;
}
// If the process made the file larger and didn't change the color scheme, ignore the result.
var oldInfo = new FileInfo(_inputPdfPath);
var newInfo = new FileInfo(tempPdfFile.Path);
if (newInfo.Length < oldInfo.Length || _type == OutputType.Printshop)
{
RobustFile.Copy(tempPdfFile.Path, _outputPdfPath, true);
}
else if (_inputPdfPath != _outputPdfPath)
{
RobustFile.Copy(_inputPdfPath, _outputPdfPath, true);
}
}
}
else
{
// This shouldn't happen. Linux Bloom package depends on the ghostscript package, and we'll include
// ghostscript files in our installer to ensure it's available on Windows. But we have this code here
// as a failsafe fallback reminding the developers to ensure this installation work happens.
Debug.WriteLine("ghostscript is not installed, so Bloom cannot process the PDF file.");
if (_inputPdfPath != _outputPdfPath)
{
RobustFile.Copy(_inputPdfPath, _outputPdfPath, true);
}
}
}
/// <summary>
/// Process the input PDF file by compressing images and/or by converting color to CMYK. The operations
/// to perform are established by the constructor.
/// </summary>
public void ProcessPdfFile(string inputFile, string outputFile, bool removeEvenPages = false)
{
_inputPdfPath = inputFile;
_outputPdfPath = outputFile;
var exePath = "/usr/bin/gs";
if (SIL.PlatformUtilities.Platform.IsWindows)
{
exePath = FindGhostcriptOnWindows();
}
if (!String.IsNullOrWhiteSpace(exePath) && File.Exists(exePath))
{
if (_worker != null)
{
_worker.ReportProgress(0, GetSpecificStatus());
}
using (var tempPdfFile = TempFile.WithExtension(".pdf"))
{
var runner = new CommandLineRunner();
var arguments = GetArguments(tempPdfFile.Path, null, removeEvenPages);
var fromDirectory = String.Empty;
var progress = new NullProgress(); // I can't figure out how to use any IProgress based code, but we show progress okay as is.
var res = runner.Start(exePath, arguments, Encoding.UTF8, fromDirectory, 3600, progress, ProcessGhostcriptReporting);
if (res.ExitCode != 0)
{
// On Linux, ghostscript doesn't deal well with some Unicode filenames. Try renaming the input
// file temporarily to something innocuous to see if this makes the ghostscript process succeed.
// See https://issues.bloomlibrary.org/youtrack/issue/BL-7177.
using (var tempInputFile = TempFile.WithExtension(".pdf"))
{
RobustFile.Delete(tempInputFile.Path); // Move won't replace even empty files.
RobustFile.Move(_inputPdfPath, tempInputFile.Path);
arguments = GetArguments(tempPdfFile.Path, tempInputFile.Path, removeEvenPages);
res = runner.Start(exePath, arguments, Encoding.UTF8, fromDirectory, 3600, progress, ProcessGhostcriptReporting);
RobustFile.Move(tempInputFile.Path, _inputPdfPath);
}
}
if (res.ExitCode != 0 || res.DidTimeOut || !RobustFile.Exists(tempPdfFile.Path))
{
if (_inputPdfPath != _outputPdfPath)
{
RobustFile.Copy(_inputPdfPath, _outputPdfPath, true);
}
return;
}
// If the process made the file larger and didn't change the color scheme and we're not removing blank pages, ignore the result.
var oldInfo = new FileInfo(_inputPdfPath);
var newInfo = new FileInfo(tempPdfFile.Path);
if (newInfo.Length < oldInfo.Length || _type == OutputType.Printshop || removeEvenPages)
{
RobustFile.Copy(tempPdfFile.Path, _outputPdfPath, true);
}
else if (_inputPdfPath != _outputPdfPath)
{
RobustFile.Copy(_inputPdfPath, _outputPdfPath, true);
}
}
}
else
{
// This shouldn't happen. Linux Bloom package depends on the ghostscript package, and we'll include
// ghostscript files in our installer to ensure it's available on Windows. But we have this code here
// as a failsafe fallback reminding the developers to ensure this installation work happens.
Debug.WriteLine("ghostscript is not installed, so Bloom cannot process the PDF file.");
if (_inputPdfPath != _outputPdfPath)
{
RobustFile.Copy(_inputPdfPath, _outputPdfPath, true);
}
}
}
