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After pre-roll we know if there have been any mutations made to the IOS embedded UIViews. If there are any mutations and the thread configuration is such chat the mutations will be committed on an illegal thread (GPU thread), we merge the threads and keep them merged until the lease expires. The lease is currently set to expire after 10 frames of no mutations. If there are any mutations in the interim we extend the lease. TaskRunnerMerger will ultimately be responsible for enforcing the correct thread configurations. This configuration will be inactive even after this change since still use the same thread when we create the iOS engine. That is slated to change in the coming PRs.
54 lines
1.8 KiB
C++
54 lines
1.8 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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#ifndef FLUTTER_SHELL_PLATFORM_FUCHSIA_COMPOSITOR_CONTEXT_H_
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#define FLUTTER_SHELL_PLATFORM_FUCHSIA_COMPOSITOR_CONTEXT_H_
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#include <fuchsia/ui/scenic/cpp/fidl.h>
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#include <fuchsia/ui/views/cpp/fidl.h>
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#include <lib/fit/function.h>
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#include "flutter/flow/compositor_context.h"
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#include "flutter/flow/embedded_views.h"
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#include "flutter/fml/macros.h"
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#include "session_connection.h"
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namespace flutter_runner {
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// Holds composition specific state and bindings specific to composition on
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// Fuchsia.
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class CompositorContext final : public flutter::CompositorContext {
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public:
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CompositorContext(std::string debug_label,
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fuchsia::ui::views::ViewToken view_token,
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fidl::InterfaceHandle<fuchsia::ui::scenic::Session> session,
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fml::closure session_error_callback,
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zx_handle_t vsync_event_handle);
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~CompositorContext() override;
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void OnSessionMetricsDidChange(const fuchsia::ui::gfx::Metrics& metrics);
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void OnSessionSizeChangeHint(float width_change_factor,
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float height_change_factor);
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private:
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const std::string debug_label_;
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SessionConnection session_connection_;
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// |flutter::CompositorContext|
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std::unique_ptr<ScopedFrame> AcquireFrame(
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GrContext* gr_context,
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SkCanvas* canvas,
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flutter::ExternalViewEmbedder* view_embedder,
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const SkMatrix& root_surface_transformation,
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bool instrumentation_enabled,
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fml::RefPtr<fml::GpuThreadMerger> gpu_thread_merger) override;
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FML_DISALLOW_COPY_AND_ASSIGN(CompositorContext);
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};
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} // namespace flutter_runner
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#endif // FLUTTER_SHELL_PLATFORM_FUCHSIA_COMPOSITOR_CONTEXT_H_
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