layout/printing/PrintTranslator.cpp

   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 "gfxContext.h"
  10 #include "nsDeviceContext.h"
  11 #include "mozilla/gfx/RecordedEvent.h"
  12 #include "mozilla/gfx/RecordingTypes.h"
  13 #include "mozilla/ProfilerMarkers.h"
  14 #include "mozilla/UniquePtr.h"
  15 #include "InlineTranslator.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;
  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