| // 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/flow/layers/container_layer.h" |
| |
| namespace flutter { |
| |
| ContainerLayer::ContainerLayer() {} |
| |
| ContainerLayer::~ContainerLayer() = default; |
| |
| void ContainerLayer::Add(std::shared_ptr<Layer> layer) { |
| layer->set_parent(this); |
| layers_.push_back(std::move(layer)); |
| } |
| |
| void ContainerLayer::Preroll(PrerollContext* context, const SkMatrix& matrix) { |
| TRACE_EVENT0("flutter", "ContainerLayer::Preroll"); |
| |
| SkRect child_paint_bounds = SkRect::MakeEmpty(); |
| PrerollChildren(context, matrix, &child_paint_bounds); |
| set_paint_bounds(child_paint_bounds); |
| } |
| |
| void ContainerLayer::PrerollChildren(PrerollContext* context, |
| const SkMatrix& child_matrix, |
| SkRect* child_paint_bounds) { |
| for (auto& layer : layers_) { |
| layer->Preroll(context, child_matrix); |
| |
| if (layer->needs_system_composite()) { |
| set_needs_system_composite(true); |
| } |
| child_paint_bounds->join(layer->paint_bounds()); |
| } |
| } |
| |
| void ContainerLayer::PaintChildren(PaintContext& context) const { |
| FML_DCHECK(needs_painting()); |
| |
| // Intentionally not tracing here as there should be no self-time |
| // and the trace event on this common function has a small overhead. |
| for (auto& layer : layers_) { |
| if (layer->needs_painting()) { |
| layer->Paint(context); |
| } |
| } |
| } |
| |
| #if defined(OS_FUCHSIA) |
| |
| void ContainerLayer::UpdateScene(SceneUpdateContext& context) { |
| UpdateSceneChildren(context); |
| } |
| |
| void ContainerLayer::UpdateSceneChildren(SceneUpdateContext& context) { |
| FML_DCHECK(needs_system_composite()); |
| |
| // Paint all of the layers which need to be drawn into the container. |
| // These may be flattened down to a containing |
| for (auto& layer : layers_) { |
| if (layer->needs_system_composite()) { |
| layer->UpdateScene(context); |
| } |
| } |
| } |
| |
| #endif // defined(OS_FUCHSIA) |
| |
| } // namespace flutter |