tor-browser

The Tor Browser
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PrintTranslator.cpp (2632B)

      1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
      3 /* This Source Code Form is subject to the terms of the Mozilla Public
      4 * License, v. 2.0. If a copy of the MPL was not distributed with this
      5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      6 
      7 #include "PrintTranslator.h"
      8 
      9 #include "InlineTranslator.h"
     10 #include "gfxContext.h"
     11 #include "mozilla/ProfilerMarkers.h"
     12 #include "mozilla/UniquePtr.h"
     13 #include "mozilla/gfx/RecordedEvent.h"
     14 #include "mozilla/gfx/RecordingTypes.h"
     15 #include "nsDeviceContext.h"
     16 
     17 using namespace mozilla::gfx;
     18 
     19 namespace mozilla {
     20 namespace layout {
     21 
     22 PrintTranslator::PrintTranslator(nsDeviceContext* aDeviceContext)
     23    : mDeviceContext(aDeviceContext) {
     24  UniquePtr<gfxContext> context =
     25      mDeviceContext->CreateReferenceRenderingContext();
     26  mBaseDT = context->GetDrawTarget();
     27 }
     28 
     29 bool PrintTranslator::TranslateRecording(PRFileDescStream& aRecording) {
     30  AUTO_PROFILER_MARKER_TEXT("PrintTranslator", LAYOUT_Printing, {},
     31                            "PrintTranslator::TranslateRecording"_ns);
     32 
     33  uint32_t magicInt;
     34  ReadElement(aRecording, magicInt);
     35  if (magicInt != mozilla::gfx::kMagicInt) {
     36    return false;
     37  }
     38 
     39  uint16_t majorRevision;
     40  ReadElement(aRecording, majorRevision);
     41  if (majorRevision != kMajorRevision) {
     42    return false;
     43  }
     44 
     45  uint16_t minorRevision;
     46  ReadElement(aRecording, minorRevision);
     47  if (minorRevision > kMinorRevision) {
     48    return false;
     49  }
     50 
     51  uint8_t eventType = RecordedEvent::EventType::INVALID;
     52  ReadElement(aRecording, eventType);
     53  while (aRecording.good()) {
     54    bool success = RecordedEvent::DoWithEventFromStream(
     55        aRecording, static_cast<RecordedEvent::EventType>(eventType),
     56        [&](RecordedEvent* recordedEvent) -> bool {
     57          // Make sure that the whole event was read from the stream.
     58          if (!aRecording.good()) {
     59            return false;
     60          }
     61 
     62          return recordedEvent->PlayEvent(this);
     63        });
     64 
     65    if (!success) {
     66      return false;
     67    }
     68 
     69    ReadElement(aRecording, eventType);
     70  }
     71 
     72  return true;
     73 }
     74 
     75 already_AddRefed<DrawTarget> PrintTranslator::CreateDrawTarget(
     76    ReferencePtr aRefPtr, const gfx::IntSize& aSize,
     77    gfx::SurfaceFormat aFormat) {
     78  UniquePtr<gfxContext> context = mDeviceContext->CreateRenderingContext();
     79  if (!context) {
     80    NS_WARNING("Failed to create rendering context for print.");
     81    return nullptr;
     82  }
     83 
     84  RefPtr<DrawTarget> drawTarget = context->GetDrawTarget();
     85  AddDrawTarget(aRefPtr, drawTarget);
     86  return drawTarget.forget();
     87 }
     88 
     89 }  // namespace layout
     90 }  // namespace mozilla