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// Copyright 2015 The Chromium 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 "ui/views/mus/surface_binding.h"
#include <stdint.h>
#include <map>
#include <utility>
#include "base/bind.h"
#include "base/lazy_instance.h"
#include "base/macros.h"
#include "base/threading/thread_local.h"
#include "cc/output/compositor_frame.h"
#include "cc/output/output_surface.h"
#include "cc/output/output_surface_client.h"
#include "cc/output/software_output_device.h"
#include "cc/resources/shared_bitmap_manager.h"
#include "components/mus/public/cpp/context_provider.h"
#include "components/mus/public/cpp/output_surface.h"
#include "components/mus/public/cpp/window.h"
#include "components/mus/public/cpp/window_tree_connection.h"
#include "components/mus/public/interfaces/gpu.mojom.h"
#include "mojo/converters/geometry/geometry_type_converters.h"
#include "mojo/converters/surfaces/surfaces_type_converters.h"
#include "mojo/public/cpp/bindings/binding.h"
#include "mojo/shell/public/cpp/shell.h"
#include "ui/views/mus/window_tree_host_mus.h"
namespace views {
// PerConnectionState ----------------------------------------------------------
// State needed per ViewManager. Provides the real implementation of
// CreateOutputSurface. SurfaceBinding obtains a pointer to the
// PerConnectionState appropriate for the ViewManager. PerConnectionState is
// stored in a thread local map. When no more refereces to a PerConnectionState
// remain the PerConnectionState is deleted and the underlying map cleaned up.
class SurfaceBinding::PerConnectionState
: public base::RefCounted<PerConnectionState> {
public:
static PerConnectionState* Get(mojo::Shell* shell,
mus::WindowTreeConnection* connection);
scoped_ptr<cc::OutputSurface> CreateOutputSurface(
mus::Window* window,
mus::mojom::SurfaceType type);
private:
typedef std::map<mus::WindowTreeConnection*, PerConnectionState*>
ConnectionToStateMap;
friend class base::RefCounted<PerConnectionState>;
PerConnectionState(mojo::Shell* shell, mus::WindowTreeConnection* connection);
~PerConnectionState();
void Init();
static base::LazyInstance<
base::ThreadLocalPointer<ConnectionToStateMap>>::Leaky window_states;
mojo::Shell* shell_;
mus::WindowTreeConnection* connection_;
// Set of state needed to create an OutputSurface.
mus::mojom::GpuPtr gpu_;
DISALLOW_COPY_AND_ASSIGN(PerConnectionState);
};
// static
base::LazyInstance<base::ThreadLocalPointer<
SurfaceBinding::PerConnectionState::ConnectionToStateMap>>::Leaky
SurfaceBinding::PerConnectionState::window_states;
// static
SurfaceBinding::PerConnectionState* SurfaceBinding::PerConnectionState::Get(
mojo::Shell* shell,
mus::WindowTreeConnection* connection) {
ConnectionToStateMap* window_map = window_states.Pointer()->Get();
if (!window_map) {
window_map = new ConnectionToStateMap;
window_states.Pointer()->Set(window_map);
}
if (!(*window_map)[connection]) {
(*window_map)[connection] = new PerConnectionState(shell, connection);
(*window_map)[connection]->Init();
}
return (*window_map)[connection];
}
scoped_ptr<cc::OutputSurface>
SurfaceBinding::PerConnectionState::CreateOutputSurface(
mus::Window* window,
mus::mojom::SurfaceType surface_type) {
// TODO(sky): figure out lifetime here. Do I need to worry about the return
// value outliving this?
mus::mojom::CommandBufferPtr cb;
gpu_->CreateOffscreenGLES2Context(GetProxy(&cb));
scoped_refptr<cc::ContextProvider> context_provider(
new mus::ContextProvider(cb.PassInterface().PassHandle()));
return make_scoped_ptr(new mus::OutputSurface(
context_provider, window->RequestSurface(surface_type)));
}
SurfaceBinding::PerConnectionState::PerConnectionState(
mojo::Shell* shell,
mus::WindowTreeConnection* connection)
: shell_(shell), connection_(connection) {}
SurfaceBinding::PerConnectionState::~PerConnectionState() {
ConnectionToStateMap* window_map = window_states.Pointer()->Get();
DCHECK(window_map);
DCHECK_EQ(this, (*window_map)[connection_]);
window_map->erase(connection_);
if (window_map->empty()) {
delete window_map;
window_states.Pointer()->Set(nullptr);
}
}
void SurfaceBinding::PerConnectionState::Init() {
shell_->ConnectToInterface("mojo:mus", &gpu_);
}
// SurfaceBinding --------------------------------------------------------------
SurfaceBinding::SurfaceBinding(mojo::Shell* shell,
mus::Window* window,
mus::mojom::SurfaceType surface_type)
: window_(window),
surface_type_(surface_type),
state_(PerConnectionState::Get(shell, window->connection())) {}
SurfaceBinding::~SurfaceBinding() {}
scoped_ptr<cc::OutputSurface> SurfaceBinding::CreateOutputSurface() {
return state_->CreateOutputSurface(window_, surface_type_);
}
} // namespace views
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