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// Copyright 2016 The Cobalt Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "cobalt/debug/backend/render_overlay.h"
#include "cobalt/math/matrix3_f.h"
#include "cobalt/render_tree/composition_node.h"
namespace cobalt {
namespace debug {
namespace backend {
RenderOverlay::RenderOverlay(
const OnRenderTreeProducedCallback& render_tree_produced_callback)
: render_tree_produced_callback_(render_tree_produced_callback),
input_layout_(NULL, base::TimeDelta()) {}
void RenderOverlay::OnRenderTreeProduced(const LayoutResults& layout_results) {
input_layout_ = layout_results;
input_receipt_time_ = base::TimeTicks::Now();
Process();
}
void RenderOverlay::SetOverlay(
const scoped_refptr<render_tree::Node>& overlay) {
overlay_ = overlay;
Process();
}
void RenderOverlay::ClearInput() {
input_layout_ = LayoutResults(NULL, base::TimeDelta());
input_receipt_time_ = base::nullopt;
}
void RenderOverlay::Process() {
if (input_layout_.render_tree) {
// Calculate a modified layout time accounting for the offset between now
// and the time the input layout was received.
base::TimeDelta layout_time = input_layout_.layout_time;
DCHECK(input_receipt_time_);
base::TimeTicks now = base::TimeTicks::Now();
layout_time += now - input_receipt_time_.value_or(now);
if (overlay_) {
render_tree::CompositionNode::Builder builder;
builder.AddChild(input_layout_.render_tree);
builder.AddChild(overlay_);
scoped_refptr<render_tree::Node> combined_tree =
new render_tree::CompositionNode(builder);
render_tree_produced_callback_.Run(LayoutResults(
combined_tree, layout_time, input_layout_.on_rasterized_callback));
} else {
render_tree_produced_callback_.Run(
LayoutResults(input_layout_.render_tree, layout_time,
input_layout_.on_rasterized_callback));
}
}
}
} // namespace backend
} // namespace debug
} // namespace cobalt