gfx/thebes/PrintTargetEMF.h

   1 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
   2  * This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #ifndef MOZILLA_GFX_PRINTTARGETEMF_H
   7 #define MOZILLA_GFX_PRINTTARGETEMF_H
   8
   9 #include "PrintTargetSkPDF.h"
  10 #include "mozilla/ipc/Shmem.h"
  11
  12 /* include windows.h for the HDC definitions that we need. */
  13 #include <windows.h>
  14
  15 namespace mozilla {
  16 namespace widget {
  17   class PDFiumProcessParent;
  18 }
  19 }
  20
  21 namespace mozilla {
  22 namespace gfx {
  23
  24 /**
  25  * A new subclass of PrintTarget.
  26  * 1. It uses PrintTargetSkPDF to generate one PDF file for one page.
  27  * 2. It then passes the FileDescriptor of that generated PDF file to the
  28  *    PDFium process for EMF conversion.
  29  * 3. After getting the converted EMF contents from the PDFium process, it then
  30  *    draws it onto the printer DC to finish one page printing task.
  31  */
  32 class PrintTargetEMF final : public mozilla::gfx::PrintTarget
  33 {
  34 public:
  35   typedef gfx::IntSize IntSize;
  36   typedef mozilla::widget::PDFiumProcessParent PDFiumProcessParent;
  37
  38   static already_AddRefed<PrintTargetEMF>
  39   CreateOrNull(HDC aDC, const IntSize& aSizeInPoints);
  40
  41   nsresult BeginPrinting(const nsAString& aTitle,
  42                                  const nsAString& aPrintToFileName,
  43                                  int32_t aStartPage,
  44                                  int32_t aEndPage) final;
  45   nsresult EndPrinting() final;
  46   nsresult AbortPrinting() final;
  47   nsresult BeginPage() final;
  48   nsresult EndPage() final;
  49
  50   already_AddRefed<DrawTarget>
  51   MakeDrawTarget(const IntSize& aSize,
  52                  DrawEventRecorder* aRecorder = nullptr) final;
  53
  54   already_AddRefed<DrawTarget>
  55   GetReferenceDrawTarget() final;
  56
  57   void ConvertToEMFDone(const nsresult& aResult, mozilla::ipc::Shmem&& aEMF);
  58   bool IsSyncPagePrinting() const final { return false; }
  59   void ChannelIsBroken() { mChannelBroken = true; }
  60
  61 private:
  62   PrintTargetEMF(HDC aDC, const IntSize& aSize);
  63   ~PrintTargetEMF() override;
  64
  65   nsString mTitle;
  66   RefPtr<PrintTargetSkPDF> mTargetForCurrentPage;
  67   nsCOMPtr<nsIFile>        mPDFFileForOnePage;
  68   RefPtr<PrintTargetSkPDF> mRefTarget;
  69   PDFiumProcessParent*     mPDFiumProcess;
  70   HDC mPrinterDC;
  71   bool mChannelBroken;
  72 };
  73
  74 } // namespace gfx
  75 } // namespace mozilla
  76
  77 #endif /* MOZILLA_GFX_PRINTTARGETEMF_H */