gecko-dev/gfx/thebes/PrintTargetEMF.h

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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* 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 MOZILLA_GFX_PRINTTARGETEMF_H
#define MOZILLA_GFX_PRINTTARGETEMF_H
#include "PrintTargetSkPDF.h"
#include "mozilla/ipc/Shmem.h"
/* include windows.h for the HDC definitions that we need. */
#include <windows.h>
namespace mozilla {
namespace widget {
class PDFiumProcessParent;
}
}
namespace mozilla {
namespace gfx {
/**
* A new subclass of PrintTarget.
* 1. It uses PrintTargetSkPDF to generate one PDF file for one page.
* 2. It then passes the FileDescriptor of that generated PDF file to the
* PDFium process for EMF conversion.
* 3. After getting the converted EMF contents from the PDFium process, it then
* draws it onto the printer DC to finish one page printing task.
*/
class PrintTargetEMF final : public mozilla::gfx::PrintTarget
{
public:
typedef gfx::IntSize IntSize;
typedef mozilla::widget::PDFiumProcessParent PDFiumProcessParent;
static already_AddRefed<PrintTargetEMF>
CreateOrNull(HDC aDC, const IntSize& aSizeInPoints);
nsresult BeginPrinting(const nsAString& aTitle,
const nsAString& aPrintToFileName,
int32_t aStartPage,
int32_t aEndPage) final;
nsresult EndPrinting() final;
nsresult AbortPrinting() final;
nsresult BeginPage() final;
nsresult EndPage() final;
already_AddRefed<DrawTarget>
MakeDrawTarget(const IntSize& aSize,
DrawEventRecorder* aRecorder = nullptr) final;
already_AddRefed<DrawTarget>
GetReferenceDrawTarget() final;
void ConvertToEMFDone(const nsresult& aResult, mozilla::ipc::Shmem&& aEMF);
bool IsSyncPagePrinting() const final { return false; }
void ChannelIsBroken() { mChannelBroken = true; }
private:
PrintTargetEMF(HDC aDC, const IntSize& aSize);
~PrintTargetEMF() override;
nsString mTitle;
RefPtr<PrintTargetSkPDF> mTargetForCurrentPage;
nsCOMPtr<nsIFile> mPDFFileForOnePage;
RefPtr<PrintTargetSkPDF> mRefTarget;
PDFiumProcessParent* mPDFiumProcess;
HDC mPrinterDC;
bool mChannelBroken;
};
} // namespace gfx
} // namespace mozilla
#endif /* MOZILLA_GFX_PRINTTARGETEMF_H */