Convert XPS, OXPS to JPG or PNG Image using C++

01 Convert XPS, OXPS to JPG or PNG Image using CPP

Convert XPS, OXPS to JPG or PNG Image using C++

XPS-To-JPG.cpp

// Input file
System::String inputFileName = u"SourceDirectory\\sample.xps";
//Output file 
System::String outputFileName = u"OutputDirectory\\XPStoImage_out.jpeg";
// Initialize XPS input stream
{
	System::SharedPtr<System::IO::Stream> xpsStream = System::IO::File::Open(inputFileName, System::IO::FileMode::Open, System::IO::FileAccess::Read);
	// Clearing resources under 'using' statement
	System::Details::DisposeGuard<1> __dispose_guard_1({ xpsStream });
	// ------------------------------------------

	try
	{
		// Load XPS document from the stream
		System::SharedPtr<XpsDocument> document = System::MakeObject<XpsDocument>(xpsStream, System::MakeObject<XpsLoadOptions>());
		// or load XPS document directly from file. No xpsStream is needed then.
		// XpsDocument document = new XpsDocument(inputFileName, new XpsLoadOptions());

		// Initialize JpegSaveOptions object with necessary parameters.
		System::SharedPtr<JpegSaveOptions> options = [&] { 
			auto tmp_0 = System::MakeObject<JpegSaveOptions>(); 
			tmp_0->set_SmoothingMode(System::Drawing::Drawing2D::SmoothingMode::HighQuality); 
			tmp_0->set_Resolution(300); 
			tmp_0->set_PageNumbers(System::MakeArray<int32_t>({ 1, 2, 6 })); 
			return tmp_0; 
		}();

		// Create rendering device for JPG format
		System::SharedPtr<ImageDevice> device = System::MakeObject<ImageDevice>();

		document->Save(device, options);

		// Iterate through document partitions (fixed documents, in XPS terms)
		for (int32_t i = 0; i < device->get_Result()->get_Length(); i++)
		{
			for (int32_t j = 0; j < device->get_Result()[i]->get_Length(); j++)
			{
				// Initialize image output stream
				{
					System::SharedPtr<System::IO::Stream> imageStream = System::IO::File::Open(System::IO::Path::GetDirectoryName(outputFileName) + u"\\" + System::IO::Path::GetFileNameWithoutExtension(outputFileName) + u"_" + (i + 1) + u"_" + (j + 1) + System::IO::Path::GetExtension(outputFileName), System::IO::FileMode::Create, System::IO::FileAccess::Write);
					// Clearing resources under 'using' statement
					System::Details::DisposeGuard<1> __dispose_guard_0({ imageStream });
					// ------------------------------------------

					try
					{
						imageStream->Write(device->get_Result()[i][j], 0, device->get_Result()[i][j]->get_Length());
					}
					catch (...)
					{
						__dispose_guard_0.SetCurrentException(std::current_exception());
					}
				}
			}
		}
	}
	catch (...)
	{
		__dispose_guard_1.SetCurrentException(std::current_exception());
	}
}

XPS-To-PNG.cpp

// Input file
System::String inputFileName = u"SourceDirectory\\sample.xps";
//Output file 
System::String outputFileName = u"OutputDirectory\\XPStoImage_out.png";
// Initialize XPS input stream
{
	System::SharedPtr<System::IO::Stream> xpsStream = System::IO::File::Open(inputFileName, System::IO::FileMode::Open, System::IO::FileAccess::Read);
	// Clearing resources under 'using' statement
	System::Details::DisposeGuard<1> __dispose_guard_1({ xpsStream });
	// ------------------------------------------

	try
	{
		// Load XPS document from the stream
		System::SharedPtr<XpsDocument> document = System::MakeObject<XpsDocument>(xpsStream, System::MakeObject<XpsLoadOptions>());
		// or load XPS document directly from file. No xpsStream is needed then.
		// XpsDocument document = new XpsDocument(inputFileName, new XpsLoadOptions());

		// Initialize PngSaveOptions object with necessary parameters.
		System::SharedPtr<PngSaveOptions> options = [&] { 
			auto tmp_0 = System::MakeObject<PngSaveOptions>(); 
			tmp_0->set_SmoothingMode(System::Drawing::Drawing2D::SmoothingMode::HighQuality); 
			tmp_0->set_Resolution(300); 
			tmp_0->set_PageNumbers(System::MakeArray<int32_t>({ 1, 2, 6 })); 
			return tmp_0; 
		}();

		// Create rendering device for PNG format
		System::SharedPtr<ImageDevice> device = System::MakeObject<ImageDevice>();

		document->Save(device, options);

		// Iterate through document partitions (fixed documents, in XPS terms)
		for (int32_t i = 0; i < device->get_Result()->get_Length(); i++)
		{
			for (int32_t j = 0; j < device->get_Result()[i]->get_Length(); j++)
			{
				// Initialize image output stream
				{
					System::SharedPtr<System::IO::Stream> imageStream = System::IO::File::Open(System::IO::Path::GetDirectoryName(outputFileName) + u"\\" + System::IO::Path::GetFileNameWithoutExtension(outputFileName) + u"_" + (i + 1) + u"_" + (j + 1) + System::IO::Path::GetExtension(outputFileName), System::IO::FileMode::Create, System::IO::FileAccess::Write);
					// Clearing resources under 'using' statement
					System::Details::DisposeGuard<1> __dispose_guard_0({ imageStream });
					// ------------------------------------------

					try
					{
						imageStream->Write(device->get_Result()[i][j], 0, device->get_Result()[i][j]->get_Length());
					}
					catch (...)
					{
						__dispose_guard_0.SetCurrentException(std::current_exception());
					}
				}
			}
		}
	}
	catch (...)
	{
		__dispose_guard_1.SetCurrentException(std::current_exception());
	}
}