flutter::ShellIOManager Class Reference

#include <shell_io_manager.h>

Inheritance diagram for flutter::ShellIOManager:

Public Member Functions
	ShellIOManager (sk_sp< GrDirectContext > resource_context, std::shared_ptr< const fml::SyncSwitch > is_gpu_disabled_sync_switch, fml::RefPtr< fml::TaskRunner > unref_queue_task_runner, std::shared_ptr< impeller::ImpellerContextFuture > impeller_context, bool impeller_enabled, fml::TimeDelta unref_queue_drain_delay=fml::TimeDelta::FromMilliseconds(8))
	~ShellIOManager () override
void	NotifyResourceContextAvailable (sk_sp< GrDirectContext > resource_context)
void	UpdateResourceContext (sk_sp< GrDirectContext > resource_context)
fml::WeakPtr< ShellIOManager >	GetWeakPtr ()
fml::WeakPtr< IOManager >	GetWeakIOManager () const override
fml::WeakPtr< GrDirectContext >	GetResourceContext () const override
fml::RefPtr< flutter::SkiaUnrefQueue >	GetSkiaUnrefQueue () const override
std::shared_ptr< const fml::SyncSwitch >	GetIsGpuDisabledSyncSwitch () override
std::shared_ptr< impeller::Context >	GetImpellerContext () const override
	Retrieve the impeller::Context.
Public Member Functions inherited from flutter::IOManager
virtual	~IOManager ()=default

Static Public Member Functions
static sk_sp< GrDirectContext >	CreateCompatibleResourceLoadingContext (GrBackendApi backend, const sk_sp< const GrGLInterface > &gl_interface)

Detailed Description

Definition at line 22 of file shell_io_manager.h.

Constructor & Destructor Documentation

ShellIOManager()

flutter::ShellIOManager::ShellIOManager	(	sk_sp< GrDirectContext >	resource_context,
		std::shared_ptr< const fml::SyncSwitch >	is_gpu_disabled_sync_switch,
		fml::RefPtr< fml::TaskRunner >	unref_queue_task_runner,
		std::shared_ptr< impeller::ImpellerContextFuture >	impeller_context,
		bool	impeller_enabled,
		fml::TimeDelta	unref_queue_drain_delay = fml::TimeDelta::FromMilliseconds(8)
	)

Definition at line 38 of file shell_io_manager.cc.

    : resource_context_(std::move(resource_context)),
      resource_context_weak_factory_(
          resource_context_
              ? std::make_unique<fml::WeakPtrFactory<GrDirectContext>>(
                    resource_context_.get())
              : nullptr),
      unref_queue_(fml::MakeRefCounted<flutter::SkiaUnrefQueue>(
          std::move(unref_queue_task_runner),
          unref_queue_drain_delay,
          resource_context_,
          /*drain_immediate=*/impeller_enabled)),
      is_gpu_disabled_sync_switch_(std::move(is_gpu_disabled_sync_switch)),
      impeller_context_(std::move(impeller_context)),
      weak_factory_(this) {
  if (!resource_context_ && !impeller_enabled) {
#ifndef OS_FUCHSIA
    FML_DLOG(WARNING) << "The IO manager was initialized without a resource "
                         "context. Async texture uploads will be disabled. "
                         "Expect performance degradation.";
#endif  // OS_FUCHSIA
  }
}

References FML_DLOG.

~ShellIOManager()

flutter::ShellIOManager::~ShellIOManager ( )

override

Definition at line 68 of file shell_io_manager.cc.

                                {
  // Last chance to drain the IO queue as the platform side reference to the
  // underlying OpenGL context may be going away.
  is_gpu_disabled_sync_switch_->Execute(
      fml::SyncSwitch::Handlers().SetIfFalse([&] { unref_queue_->Drain(); }));
}

Member Function Documentation

CreateCompatibleResourceLoadingContext()

sk_sp< GrDirectContext > flutter::ShellIOManager::CreateCompatibleResourceLoadingContext ( GrBackendApi  backend, const sk_sp< const GrGLInterface > &  gl_interface  )

static

Definition at line 17 of file shell_io_manager.cc.

                                                    {
#if SK_GL
  if (backend != GrBackendApi::kOpenGL) {
    return nullptr;
  }
 
  const auto options = MakeDefaultContextOptions(ContextType::kResource);
 
  if (auto context = GrDirectContexts::MakeGL(gl_interface, options)) {
    // Do not cache textures created by the image decoder.  These textures
    // should be deleted when they are no longer referenced by an SkImage.
    context->setResourceCacheLimit(0);
    return context;
  }
#endif  // SK_GL
 
  return nullptr;
}

References flutter::kResource, and flutter::MakeDefaultContextOptions().

GetImpellerContext()

std::shared_ptr< impeller::Context > flutter::ShellIOManager::GetImpellerContext ( ) const

overridevirtual

Retrieve the impeller::Context.

Call may block until context is availabe.

Implements flutter::IOManager.

Definition at line 124 of file shell_io_manager.cc.

                                                                        {
  return impeller_context_->GetContext();
}

GetIsGpuDisabledSyncSwitch()

std::shared_ptr< const fml::SyncSwitch > flutter::ShellIOManager::GetIsGpuDisabledSyncSwitch ( )

overridevirtual

Implements flutter::IOManager.

Definition at line 119 of file shell_io_manager.cc.

                                           {
  return is_gpu_disabled_sync_switch_;
}

GetResourceContext()

fml::WeakPtr< GrDirectContext > flutter::ShellIOManager::GetResourceContext ( ) const

overridevirtual

Implements flutter::IOManager.

Definition at line 101 of file shell_io_manager.cc.

                                                                     {
  return resource_context_weak_factory_
             ? resource_context_weak_factory_->GetWeakPtr()
             : fml::WeakPtr<GrDirectContext>();
}

GetSkiaUnrefQueue()

fml::RefPtr< flutter::SkiaUnrefQueue > flutter::ShellIOManager::GetSkiaUnrefQueue ( ) const

overridevirtual

Implements flutter::IOManager.

Definition at line 108 of file shell_io_manager.cc.

                                                                         {
  return unref_queue_;
}

GetWeakIOManager()

fml::WeakPtr< IOManager > flutter::ShellIOManager::GetWeakIOManager ( ) const

overridevirtual

Implements flutter::IOManager.

Definition at line 113 of file shell_io_manager.cc.

                                                             {
  return weak_factory_.GetWeakPtr();
}

GetWeakPtr()

fml::WeakPtr< ShellIOManager > flutter::ShellIOManager::GetWeakPtr

(

)

Definition at line 96 of file shell_io_manager.cc.

                                                      {
  return weak_factory_.GetWeakPtr();
}

NotifyResourceContextAvailable()

void flutter::ShellIOManager::NotifyResourceContextAvailable

(

sk_sp< GrDirectContext >

resource_context

)

Definition at line 75 of file shell_io_manager.cc.

                                             {
  // The resource context needs to survive as long as we have Dart objects
  // referencing. We shouldn't ever need to replace it if we have one - unless
  // we've somehow shut down the Dart VM and started a new one fresh.
  if (!resource_context_) {
    UpdateResourceContext(std::move(resource_context));
  }
}

References UpdateResourceContext().

UpdateResourceContext()

void flutter::ShellIOManager::UpdateResourceContext

(

sk_sp< GrDirectContext >

resource_context

)

Definition at line 85 of file shell_io_manager.cc.

                                             {
  resource_context_ = std::move(resource_context);
  resource_context_weak_factory_ =
      resource_context_
          ? std::make_unique<fml::WeakPtrFactory<GrDirectContext>>(
                resource_context_.get())
          : nullptr;
  unref_queue_->UpdateResourceContext(resource_context_);
}

Referenced by NotifyResourceContextAvailable().

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The documentation for this class was generated from the following files:

• shell/common/shell_io_manager.h
• shell/common/shell_io_manager.cc