command_buffer.cc File Reference

#include "flutter/lib/gpu/command_buffer.h"
#include "dart_api.h"
#include "fml/make_copyable.h"
#include "impeller/renderer/command_buffer.h"
#include "impeller/renderer/render_pass.h"
#include "lib/ui/ui_dart_state.h"
#include "tonic/converter/dart_converter.h"

Go to the source code of this file.

Namespaces
namespace	flutter
namespace	flutter::gpu

Functions
	flutter::gpu::IMPLEMENT_WRAPPERTYPEINFO (flutter_gpu, CommandBuffer)
bool	InternalFlutterGpu_CommandBuffer_Initialize (Dart_Handle wrapper, flutter::gpu::Context *contextWrapper)
Dart_Handle	InternalFlutterGpu_CommandBuffer_Submit (flutter::gpu::CommandBuffer *wrapper, Dart_Handle completion_callback)

Function Documentation

InternalFlutterGpu_CommandBuffer_Initialize()

bool InternalFlutterGpu_CommandBuffer_Initialize	(	Dart_Handle	wrapper,
		flutter::gpu::Context *	contextWrapper
	)

Exports

Definition at line 80 of file command_buffer.cc.

                                       {
  auto res = fml::MakeRefCounted<flutter::gpu::CommandBuffer>(
      contextWrapper->GetContextShared(),
      contextWrapper->GetContext().CreateCommandBuffer());
  res->AssociateWithDartWrapper(wrapper);
 
  return true;
}

References impeller::Context::CreateCommandBuffer(), flutter::gpu::Context::GetContext(), and flutter::gpu::Context::GetContextShared().

InternalFlutterGpu_CommandBuffer_Submit()

Dart_Handle InternalFlutterGpu_CommandBuffer_Submit	(	flutter::gpu::CommandBuffer *	wrapper,
		Dart_Handle	completion_callback
	)

Definition at line 91 of file command_buffer.cc.

                                     {
  if (Dart_IsNull(completion_callback)) {
    bool success = wrapper->Submit();
    if (!success) {
      return tonic::ToDart("Failed to submit CommandBuffer");
    }
    return Dart_Null();
  }
 
  if (!Dart_IsClosure(completion_callback)) {
    return tonic::ToDart("Completion callback must be a function");
  }
 
  auto dart_state = flutter::UIDartState::Current();
  auto& task_runners = dart_state->GetTaskRunners();
 
  auto persistent_completion_callback =
      std::make_unique<tonic::DartPersistentValue>(dart_state,
                                                   completion_callback);
 
  auto ui_task_completion_callback = fml::MakeCopyable(
      [callback = std::move(persistent_completion_callback),
       task_runners](impeller::CommandBuffer::Status status) mutable {
        bool success = status != impeller::CommandBuffer::Status::kError;
 
        auto ui_completion_task = fml::MakeCopyable(
            [callback = std::move(callback), success]() mutable {
              auto dart_state = callback->dart_state().lock();
              if (!dart_state) {
                // The root isolate could have died in the meantime.
                return;
              }
              tonic::DartState::Scope scope(dart_state);
 
              tonic::DartInvoke(callback->Get(), {tonic::ToDart(success)});
 
              // callback is associated with the Dart isolate and must be
              // deleted on the UI thread.
              callback.reset();
            });
        task_runners.GetUITaskRunner()->PostTask(ui_completion_task);
      });
  bool success = wrapper->Submit(ui_task_completion_callback);
  if (!success) {
    return tonic::ToDart("Failed to submit CommandBuffer");
  }
  return Dart_Null();
}

References callback, flutter::UIDartState::Current(), tonic::DartInvoke(), impeller::CommandBuffer::kError, fml::MakeCopyable(), flutter::gpu::CommandBuffer::Submit(), and tonic::ToDart().