1 files changed, 107 insertions, 0 deletions
diff --git a/layout/printing/PrintTranslator.cpp b/layout/printing/PrintTranslator.cpp
new file mode 100644
index 0000000000..86eddfaf38
--- /dev/null
+++ b/layout/printing/PrintTranslator.cpp
@@ -0,0 +1,107 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 "PrintTranslator.h"
+
+#include "gfxContext.h"
+#include "nsDeviceContext.h"
+#include "mozilla/gfx/RecordedEvent.h"
+#include "mozilla/gfx/RecordingTypes.h"
+#include "mozilla/UniquePtr.h"
+#include "InlineTranslator.h"
+
+using namespace mozilla::gfx;
+
+namespace mozilla {
+namespace layout {
+
+PrintTranslator::PrintTranslator(nsDeviceContext* aDeviceContext)
+    : mDeviceContext(aDeviceContext) {
+  RefPtr<gfxContext> context =
+      mDeviceContext->CreateReferenceRenderingContext();
+  mBaseDT = context->GetDrawTarget();
+}
+
+bool PrintTranslator::TranslateRecording(PRFileDescStream& aRecording) {
+  uint32_t magicInt;
+  ReadElement(aRecording, magicInt);
+  if (magicInt != mozilla::gfx::kMagicInt) {
+    return false;
+  }
+
+  uint16_t majorRevision;
+  ReadElement(aRecording, majorRevision);
+  if (majorRevision != kMajorRevision) {
+    return false;
+  }
+
+  uint16_t minorRevision;
+  ReadElement(aRecording, minorRevision);
+  if (minorRevision > kMinorRevision) {
+    return false;
+  }
+
+  int32_t eventType;
+  ReadElement(aRecording, eventType);
+  while (aRecording.good()) {
+    bool success = RecordedEvent::DoWithEventFromStream(
+        aRecording, static_cast<RecordedEvent::EventType>(eventType),
+        [&](RecordedEvent* recordedEvent) -> bool {
+          // Make sure that the whole event was read from the stream.
+          if (!aRecording.good()) {
+            return false;
+          }
+
+          return recordedEvent->PlayEvent(this);
+        });
+
+    if (!success) {
+      return false;
+    }
+
+    ReadElement(aRecording, eventType);
+  }
+
+  return true;
+}
+
+already_AddRefed<DrawTarget> PrintTranslator::CreateDrawTarget(
+    ReferencePtr aRefPtr, const gfx::IntSize& aSize,
+    gfx::SurfaceFormat aFormat) {
+  RefPtr<gfxContext> context = mDeviceContext->CreateRenderingContext();
+  if (!context) {
+    NS_WARNING("Failed to create rendering context for print.");
+    return nullptr;
+  }
+
+  RefPtr<DrawTarget> drawTarget = context->GetDrawTarget();
+  AddDrawTarget(aRefPtr, drawTarget);
+  return drawTarget.forget();
+}
+
+already_AddRefed<SourceSurface> PrintTranslator::LookupExternalSurface(
+    uint64_t aKey) {
+  RefPtr<RecordedDependentSurface> surface = mDependentSurfaces.Get(aKey);
+  if (!surface) {
+    return nullptr;
+  }
+
+  RefPtr<DrawTarget> newDT = GetReferenceDrawTarget()->CreateSimilarDrawTarget(
+      surface->mSize, SurfaceFormat::B8G8R8A8);
+
+  InlineTranslator translator(newDT, nullptr);
+  translator.SetDependentSurfaces(&mDependentSurfaces);
+  if (!translator.TranslateRecording((char*)surface->mRecording.mData,
+                                     surface->mRecording.mLen)) {
+    return nullptr;
+  }
+
+  RefPtr<SourceSurface> snapshot = newDT->Snapshot();
+  return snapshot.forget();
+}
+
+}  // namespace layout
+}  // namespace mozilla