gecko-dev/gfx/thebes/PrintTargetSkPDF.cpp

160 строки
4.1 KiB
C++

/* -*- 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/. */
#include "PrintTargetSkPDF.h"
#include "mozilla/gfx/2D.h"
#include "nsString.h"
#include <vector>
namespace mozilla {
namespace gfx {
PrintTargetSkPDF::PrintTargetSkPDF(const IntSize& aSize,
UniquePtr<SkWStream> aStream)
: PrintTarget(/* not using cairo_surface_t */ nullptr, aSize)
, mOStream(Move(aStream))
, mPageCanvas(nullptr)
{
}
PrintTargetSkPDF::~PrintTargetSkPDF()
{
Finish(); // ensure stream is flushed
// Make sure mPDFDoc and mRefPDFDoc are destroyed before our member streams
// (which they wrap) are destroyed:
mPDFDoc = nullptr;
mRefPDFDoc = nullptr;
}
/* static */ already_AddRefed<PrintTargetSkPDF>
PrintTargetSkPDF::CreateOrNull(UniquePtr<SkWStream> aStream,
const IntSize& aSizeInPoints)
{
return do_AddRef(new PrintTargetSkPDF(aSizeInPoints, Move(aStream)));
}
nsresult
PrintTargetSkPDF::BeginPrinting(const nsAString& aTitle,
const nsAString& aPrintToFileName,
int32_t aStartPage,
int32_t aEndPage)
{
// We need to create the SkPDFDocument here rather than in CreateOrNull
// because it's only now that we are given aTitle which we want for the
// PDF metadata.
SkDocument::PDFMetadata metadata;
metadata.fTitle = NS_ConvertUTF16toUTF8(aTitle).get();
metadata.fCreator = "Firefox";
SkTime::DateTime now;
SkTime::GetDateTime(&now);
metadata.fCreation.fEnabled = true;
metadata.fCreation.fDateTime = now;
metadata.fModified.fEnabled = true;
metadata.fModified.fDateTime = now;
// SkDocument stores a non-owning raw pointer to aStream
mPDFDoc = SkDocument::MakePDF(mOStream.get(), SK_ScalarDefaultRasterDPI,
metadata, /*jpegEncoder*/ nullptr, true);
return mPDFDoc ? NS_OK : NS_ERROR_FAILURE;
}
nsresult
PrintTargetSkPDF::BeginPage()
{
mPageCanvas = sk_ref_sp(mPDFDoc->beginPage(mSize.width, mSize.height));
return !mPageCanvas ? NS_ERROR_FAILURE : PrintTarget::BeginPage();
}
nsresult
PrintTargetSkPDF::EndPage()
{
mPageCanvas = nullptr;
mPageDT = nullptr;
return PrintTarget::EndPage();
}
nsresult
PrintTargetSkPDF::EndPrinting()
{
mPDFDoc->close();
if (mRefPDFDoc) {
mRefPDFDoc->close();
}
mPageCanvas = nullptr;
mPageDT = nullptr;
return NS_OK;
}
void
PrintTargetSkPDF::Finish()
{
if (mIsFinished) {
return;
}
mOStream->flush();
PrintTarget::Finish();
}
already_AddRefed<DrawTarget>
PrintTargetSkPDF::MakeDrawTarget(const IntSize& aSize,
DrawEventRecorder* aRecorder)
{
if (aRecorder) {
return PrintTarget::MakeDrawTarget(aSize, aRecorder);
}
//MOZ_ASSERT(aSize == mSize, "Should mPageCanvas size match?");
if (!mPageCanvas) {
return nullptr;
}
mPageDT = Factory::CreateDrawTargetWithSkCanvas(mPageCanvas.get());
if (!mPageDT) {
mPageCanvas = nullptr;
return nullptr;
}
return do_AddRef(mPageDT);
}
already_AddRefed<DrawTarget>
PrintTargetSkPDF::GetReferenceDrawTarget(DrawEventRecorder* aRecorder)
{
if (!mRefDT) {
SkDocument::PDFMetadata metadata;
// SkDocument stores a non-owning raw pointer to aStream
mRefPDFDoc = SkDocument::MakePDF(&mRefOStream,
SK_ScalarDefaultRasterDPI,
metadata, nullptr, true);
if (!mRefPDFDoc) {
return nullptr;
}
mRefCanvas = sk_ref_sp(mRefPDFDoc->beginPage(mSize.width, mSize.height));
if (!mRefCanvas) {
return nullptr;
}
RefPtr<DrawTarget> dt =
Factory::CreateDrawTargetWithSkCanvas(mRefCanvas.get());
if (!dt) {
return nullptr;
}
if (aRecorder) {
dt = CreateRecordingDrawTarget(aRecorder, dt);
if (!dt || !dt->IsValid()) {
return nullptr;
}
}
mRefDT = dt.forget();
}
return do_AddRef(mRefDT);
}
} // namespace gfx
} // namespace mozilla