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f2dbeb8aa7
This reverts commit 6ea69a0d4339dd153899bb6c299689f1dd43329d. On top of the revert, it reverted a commit in the PR: https://github.com/flutter/engine/pull/14024 This reverts commit ea67e5b0b930ebf552bc7dbd678a35ee6a129c39.
89 lines
2.6 KiB
C++
89 lines
2.6 KiB
C++
// Copyright 2013 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "flutter/flow/layers/container_layer.h"
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namespace flutter {
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ContainerLayer::ContainerLayer() {}
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void ContainerLayer::Add(std::shared_ptr<Layer> layer) {
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layers_.emplace_back(std::move(layer));
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}
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void ContainerLayer::Preroll(PrerollContext* context, const SkMatrix& matrix) {
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TRACE_EVENT0("flutter", "ContainerLayer::Preroll");
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SkRect child_paint_bounds = SkRect::MakeEmpty();
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PrerollChildren(context, matrix, &child_paint_bounds);
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set_paint_bounds(child_paint_bounds);
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}
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void ContainerLayer::Paint(PaintContext& context) const {
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FML_DCHECK(needs_painting());
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PaintChildren(context);
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}
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void ContainerLayer::PrerollChildren(PrerollContext* context,
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const SkMatrix& child_matrix,
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SkRect* child_paint_bounds) {
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// Platform views have no children, so context->has_platform_view should
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// always be false.
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FML_DCHECK(!context->has_platform_view);
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bool child_has_platform_view = false;
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for (auto& layer : layers_) {
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// Reset context->has_platform_view to false so that layers aren't treated
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// as if they have a platform view based on one being previously found in a
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// sibling tree.
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context->has_platform_view = false;
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layer->Preroll(context, child_matrix);
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if (layer->needs_system_composite()) {
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set_needs_system_composite(true);
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}
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child_paint_bounds->join(layer->paint_bounds());
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child_has_platform_view =
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child_has_platform_view || context->has_platform_view;
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}
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context->has_platform_view = child_has_platform_view;
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}
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void ContainerLayer::PaintChildren(PaintContext& context) const {
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FML_DCHECK(needs_painting());
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// Intentionally not tracing here as there should be no self-time
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// and the trace event on this common function has a small overhead.
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for (auto& layer : layers_) {
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if (layer->needs_painting()) {
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layer->Paint(context);
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}
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}
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}
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#if defined(OS_FUCHSIA)
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void ContainerLayer::UpdateScene(SceneUpdateContext& context) {
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UpdateSceneChildren(context);
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}
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void ContainerLayer::UpdateSceneChildren(SceneUpdateContext& context) {
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FML_DCHECK(needs_system_composite());
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// Paint all of the layers which need to be drawn into the container.
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// These may be flattened down to a containing
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for (auto& layer : layers_) {
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if (layer->needs_system_composite()) {
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layer->UpdateScene(context);
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}
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}
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}
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#endif // defined(OS_FUCHSIA)
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} // namespace flutter
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