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58e84c8bf0
* Re-land "Support multiple shells in a single process. (#4932)" This reverts commit 723c7d01439da4261bc836075fb55651ce9e7f03.
87 lines
3.0 KiB
C++
87 lines
3.0 KiB
C++
// Copyright 2018 The Fuchsia 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 "compositor_context.h"
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#include "flutter/flow/layers/layer_tree.h"
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#include "flutter/glue/trace_event.h"
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namespace flutter {
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class ScopedFrame final : public flow::CompositorContext::ScopedFrame {
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public:
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ScopedFrame(flow::CompositorContext& context,
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bool instrumentation_enabled,
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SessionConnection& session_connection)
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: flow::CompositorContext::ScopedFrame(context,
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nullptr,
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nullptr,
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instrumentation_enabled),
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session_connection_(session_connection) {}
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private:
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SessionConnection& session_connection_;
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bool Raster(flow::LayerTree& layer_tree, bool ignore_raster_cache) override {
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if (!session_connection_.has_metrics()) {
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return true;
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}
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{
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// Preroll the Flutter layer tree. This allows Flutter to perform
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// pre-paint optimizations.
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TRACE_EVENT0("flutter", "Preroll");
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layer_tree.Preroll(*this, true /* ignore raster cache */);
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}
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{
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// Traverse the Flutter layer tree so that the necessary session ops to
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// represent the frame are enqueued in the underlying session.
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TRACE_EVENT0("flutter", "UpdateScene");
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layer_tree.UpdateScene(session_connection_.scene_update_context(),
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session_connection_.root_node());
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}
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{
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// Flush all pending session ops.
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TRACE_EVENT0("flutter", "SessionPresent");
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session_connection_.Present(*this);
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}
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return true;
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}
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FXL_DISALLOW_COPY_AND_ASSIGN(ScopedFrame);
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};
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CompositorContext::CompositorContext(
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const ui::ScenicPtr& scenic,
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std::string debug_label,
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zx::eventpair import_token,
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OnMetricsUpdate session_metrics_did_change_callback,
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fxl::Closure session_error_callback)
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: debug_label_(std::move(debug_label)),
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session_connection_(scenic,
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debug_label_,
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std::move(import_token),
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std::move(session_metrics_did_change_callback),
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std::move(session_error_callback)) {}
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CompositorContext::~CompositorContext() = default;
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std::unique_ptr<flow::CompositorContext::ScopedFrame>
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CompositorContext::AcquireFrame(GrContext* gr_context,
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SkCanvas* canvas,
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bool instrumentation_enabled) {
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// TODO: The AcquireFrame interface is too broad and must be refactored to get
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// rid of the context and canvas arguments as those seem to be only used for
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// colorspace correctness purposes on the mobile shells.
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return std::make_unique<flutter::ScopedFrame>(*this, //
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instrumentation_enabled, //
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session_connection_ //
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);
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}
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} // namespace flutter
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