зеркало из https://github.com/mozilla/gecko-dev.git
77 строки
2.4 KiB
C++
77 строки
2.4 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef MOZILLA_GFX_PRINTTARGETSKPDF_H
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#define MOZILLA_GFX_PRINTTARGETSKPDF_H
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#include "mozilla/UniquePtr.h"
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#include "nsCOMPtr.h"
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#include "PrintTarget.h"
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#include "SkCanvas.h"
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#include "SkDocument.h"
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#include "SkStream.h"
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namespace mozilla {
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namespace gfx {
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/**
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* Skia PDF printing target.
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*/
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class PrintTargetSkPDF final : public PrintTarget
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{
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public:
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// The returned PrintTargetSkPDF keeps a raw pointer to the passed SkWStream
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// but does not own it. Callers are responsible for ensuring that passed
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// stream outlives the returned PrintTarget.
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static already_AddRefed<PrintTargetSkPDF>
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CreateOrNull(UniquePtr<SkWStream> aStream,
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const IntSize& aSizeInPoints);
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virtual nsresult BeginPrinting(const nsAString& aTitle,
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const nsAString& aPrintToFileName,
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int32_t aStartPage,
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int32_t aEndPage) override;
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virtual nsresult EndPrinting() override;
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virtual void Finish() override;
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virtual nsresult BeginPage() override;
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virtual nsresult EndPage() override;
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virtual already_AddRefed<DrawTarget>
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MakeDrawTarget(const IntSize& aSize,
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DrawEventRecorder* aRecorder = nullptr) final;
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virtual already_AddRefed<DrawTarget>
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GetReferenceDrawTarget(DrawEventRecorder* aRecorder) override final;
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private:
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PrintTargetSkPDF(const IntSize& aSize,
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UniquePtr<SkWStream> aStream);
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virtual ~PrintTargetSkPDF();
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// Do not hand out references to this object. It holds a non-owning
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// reference to mOStreame, so must not outlive mOStream.
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sk_sp<SkDocument> mPDFDoc;
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// The stream that the SkDocument outputs to.
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UniquePtr<SkWStream> mOStream;
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// The current page's SkCanvas and its wrapping DrawTarget:
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// Canvas is owned by mPDFDoc, which handles its deletion.
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SkCanvas* mPageCanvas;
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RefPtr<DrawTarget> mPageDT;
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// Members needed to provide a reference DrawTarget:
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sk_sp<SkDocument> mRefPDFDoc;
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// Canvas owned by mRefPDFDoc, which handles its deletion.
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SkCanvas* mRefCanvas;
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SkDynamicMemoryWStream mRefOStream;
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};
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} // namespace gfx
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} // namespace mozilla
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#endif /* MOZILLA_GFX_PRINTTARGETSKPDF_H */
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