[Experimental] Supporting OOPIF printing

third_party/WebKit/Source/core/paint/RemoteFramePainter.cpp

+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "core/paint/RemoteFramePainter.h"
+
+#include "third_party/WebKit/Source/core/frame/RemoteFrameView.h"
+#include "third_party/WebKit/Source/platform/graphics/GraphicsContext.h"
+#include "third_party/WebKit/Source/platform/graphics/paint/CullRect.h"
+#include "third_party/WebKit/Source/platform/graphics/paint/DrawingRecorder.h"
+#include "third_party/WebKit/Source/platform/graphics/paint/PaintRecordBuilder.h"
+#include "third_party/WebKit/public/web/WebRemoteFrame.h"
+#include "third_party/skia/include/core/SkCanvas.h"
+#include "third_party/skia/include/core/SkPictureRecorder.h"
+#include "third_party/skia/include/core/SkRect.h"
+
+namespace blink {
+
+void RemoteFramePainter::paint(GraphicsContext& context,
+                               const CullRect& rect) const {
+  DCHECK(context.printing());
+
+  IntRect bound(m_frameView.frameRect());
+  SkRect skRect;
+  skRect.iset(bound.x(), bound.y(), bound.x() + bound.width(),
+              bound.y() + bound.height());
+
+  // Inform the actual frame printing.
+  int id = m_frameView.print(bound, context.printPageNumber());
+
+  if (!drawable_)
+    drawable_.reset(new SkFutureDrawable(skRect, id));
+
+  DrawingRecorder drawRecorder(context, m_frameView,
+                               DisplayItem::kDocumentBackground,
+                               FloatRect(skRect));
+  DCHECK(context.canvas());
+  context.canvas()->drawDrawable(drawable_.get());
+}
+
+}  // namespace blink