picture_recorder.cc

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// Copyright 2013 The Flutter 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 "flutter/lib/ui/painting/picture_recorder.h"
 
#include "flutter/lib/ui/painting/canvas.h"
#include "flutter/lib/ui/painting/picture.h"
#include "third_party/tonic/converter/dart_converter.h"
#include "third_party/tonic/dart_args.h"
#include "third_party/tonic/dart_binding_macros.h"
#include "third_party/tonic/dart_library_natives.h"
 
namespace flutter {
 
IMPLEMENT_WRAPPERTYPEINFO(ui, PictureRecorder);
 
void PictureRecorder::Create(Dart_Handle wrapper) {
  UIDartState::ThrowIfUIOperationsProhibited();
  auto res = fml::MakeRefCounted<PictureRecorder>();
  res->AssociateWithDartWrapper(wrapper);
}
 
PictureRecorder::PictureRecorder() {}
 
PictureRecorder::~PictureRecorder() {}
 
sk_sp<DisplayListBuilder> PictureRecorder::BeginRecording(DlRect bounds) {
  display_list_builder_ =
      sk_make_sp<DisplayListBuilder>(bounds, /*prepare_rtree=*/true);
  return display_list_builder_;
}
 
void PictureRecorder::endRecording(Dart_Handle dart_picture) {
  if (!canvas_) {
    return;
  }
 
  auto display_list = display_list_builder_->Build();
  display_list_builder_ = nullptr;
 
  FML_DCHECK(display_list->has_rtree());
  Picture::CreateAndAssociateWithDartWrapper(dart_picture, display_list);
 
  canvas_->Invalidate();
  canvas_ = nullptr;
  ClearDartWrapper();
}
 
}  // namespace flutter