gecko-dev/widget/windows/PDFViaEMFPrintHelper.h
Masatoshi Kimura 526dc874b1 Bug 685236 - Stop using GetNativePath in widget/windows. r=jimm
MozReview-Commit-ID: I49ngV1Jq9I

--HG--
extra : source : 667abe2ccae907c9f9c71f1c01b7562e036907e2
extra : intermediate-source : b67934d4d458a3e751def1c33c3c6d421772cf51
2017-12-16 14:51:31 +09:00

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2.3 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef PDFVIAEMFPRINTHELPER_H_
#define PDFVIAEMFPRINTHELPER_H_
#include "nsCOMPtr.h"
#include "PDFiumEngineShim.h"
#include "mozilla/Vector.h"
#include "mozilla/ipc/FileDescriptor.h"
#include "mozilla/ipc/Shmem.h"
/* include windows.h for the HDC definitions that we need. */
#include <windows.h>
class nsIFile;
class nsFileInputStream;
namespace mozilla {
namespace ipc {
class IShmemAllocator;
}
namespace widget {
/**
* This class helps draw a PDF file to a given Windows DC.
* To do that it first converts the PDF file to EMF.
* Windows EMF:
* https://msdn.microsoft.com/en-us/windows/hardware/drivers/print/emf-data-type
*/
class PDFViaEMFPrintHelper
{
public:
typedef mozilla::ipc::FileDescriptor FileDescriptor;
PDFViaEMFPrintHelper();
virtual ~PDFViaEMFPrintHelper();
/** Loads the specified PDF file. */
NS_IMETHOD OpenDocument(nsIFile* aFile);
NS_IMETHOD OpenDocument(const FileDescriptor& aFD);
/** Releases document buffer. */
void CloseDocument();
int GetPageCount() const { return mPDFiumEngine->GetPageCount(mPDFDoc); }
/**
* Convert the specified PDF page to EMF and draw the EMF onto the
* given DC.
*/
bool DrawPage(HDC aPrinterDC, unsigned int aPageIndex,
int aPageWidth, int aPageHeight);
/** Convert the specified PDF page to EMF and save it to file. */
bool SavePageToFile(const wchar_t* aFilePath, unsigned int aPageIndex,
int aPageWidth, int aPageHeight);
/** Create a share memory and serialize the EMF content into it. */
bool SavePageToBuffer(unsigned int aPageIndex, int aPageWidth,
int aPageHeight, ipc::Shmem& aMem,
mozilla::ipc::IShmemAllocator* aAllocator);
protected:
virtual bool CreatePDFiumEngineIfNeed();
bool RenderPageToDC(HDC aDC, unsigned int aPageIndex,
int aPageWidth, int aPageHeight);
RefPtr<PDFiumEngineShim> mPDFiumEngine;
FPDF_DOCUMENT mPDFDoc;
PRFileDesc* mPrfile;
};
} // namespace widget
} // namespace mozilla
#endif /* PDFVIAEMFPRINTHELPER_H_ */