device_buffer.cc File Reference

#include "flutter/lib/gpu/device_buffer.h"
#include "dart_api.h"
#include "flutter/lib/gpu/formats.h"
#include "fml/mapping.h"
#include "impeller/core/device_buffer.h"
#include "impeller/core/device_buffer_descriptor.h"
#include "impeller/core/formats.h"
#include "impeller/core/range.h"
#include "third_party/tonic/typed_data/dart_byte_data.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, DeviceBuffer)
bool	InternalFlutterGpu_DeviceBuffer_Initialize (Dart_Handle wrapper, flutter::gpu::Context *gpu_context, int storage_mode, int size_in_bytes)
bool	InternalFlutterGpu_DeviceBuffer_InitializeWithHostData (Dart_Handle wrapper, flutter::gpu::Context *gpu_context, Dart_Handle byte_data)
bool	InternalFlutterGpu_DeviceBuffer_Overwrite (flutter::gpu::DeviceBuffer *device_buffer, Dart_Handle source_byte_data, int destination_offset_in_bytes)
bool	InternalFlutterGpu_DeviceBuffer_Flush (flutter::gpu::DeviceBuffer *device_buffer, int offset_in_bytes, int size_in_bytes)

Function Documentation

InternalFlutterGpu_DeviceBuffer_Flush()

bool InternalFlutterGpu_DeviceBuffer_Flush	(	flutter::gpu::DeviceBuffer *	device_buffer,
		int	offset_in_bytes,
		int	size_in_bytes
	)

Definition at line 108 of file device_buffer.cc.

                       {
  device_buffer->GetBuffer()->Flush(
      impeller::Range(offset_in_bytes, size_in_bytes));
  return true;
}

References flutter::gpu::DeviceBuffer::GetBuffer().

InternalFlutterGpu_DeviceBuffer_Initialize()

bool InternalFlutterGpu_DeviceBuffer_Initialize	(	Dart_Handle	wrapper,
		flutter::gpu::Context *	gpu_context,
		int	storage_mode,
		int	size_in_bytes
	)

Exports

Definition at line 50 of file device_buffer.cc.

                       {
  impeller::DeviceBufferDescriptor desc;
  desc.storage_mode = flutter::gpu::ToImpellerStorageMode(storage_mode);
  desc.size = size_in_bytes;
  auto device_buffer =
      gpu_context->GetContext().GetResourceAllocator()->CreateBuffer(desc);
  if (!device_buffer) {
    FML_LOG(ERROR) << "Failed to create device buffer.";
    return false;
  }
 
  auto res =
      fml::MakeRefCounted<flutter::gpu::DeviceBuffer>(std::move(device_buffer));
  res->AssociateWithDartWrapper(wrapper);
 
  return true;
}

References FML_LOG, flutter::gpu::Context::GetContext(), impeller::Context::GetResourceAllocator(), impeller::DeviceBufferDescriptor::size, impeller::DeviceBufferDescriptor::storage_mode, and flutter::gpu::ToImpellerStorageMode().

InternalFlutterGpu_DeviceBuffer_InitializeWithHostData()

bool InternalFlutterGpu_DeviceBuffer_InitializeWithHostData	(	Dart_Handle	wrapper,
		flutter::gpu::Context *	gpu_context,
		Dart_Handle	byte_data
	)

Definition at line 72 of file device_buffer.cc.

                           {
  std::shared_ptr<impeller::DeviceBuffer> device_buffer = nullptr;
  {
    // `DartByteData` gets raw pointers into the Dart heap via
    // `Dart_TypedDataAcquireData`. So it must be destructed before
    // `AssociateWithDartWrapper` is called, which mutates the heap.
    auto data = tonic::DartByteData(byte_data);
    auto mapping = fml::NonOwnedMapping(reinterpret_cast<uint8_t*>(data.data()),
                                        data.length_in_bytes());
    device_buffer =
        gpu_context->GetContext().GetResourceAllocator()->CreateBufferWithCopy(
            mapping);
  }
  if (!device_buffer) {
    FML_LOG(ERROR) << "Failed to create device buffer with copy.";
    return false;
  }
 
  auto res =
      fml::MakeRefCounted<flutter::gpu::DeviceBuffer>(std::move(device_buffer));
  res->AssociateWithDartWrapper(wrapper);
 
  return true;
}

References data, FML_LOG, flutter::gpu::Context::GetContext(), and impeller::Context::GetResourceAllocator().

InternalFlutterGpu_DeviceBuffer_Overwrite()

bool InternalFlutterGpu_DeviceBuffer_Overwrite	(	flutter::gpu::DeviceBuffer *	device_buffer,
		Dart_Handle	source_byte_data,
		int	destination_offset_in_bytes
	)

Definition at line 100 of file device_buffer.cc.

                                     {
  return device_buffer->Overwrite(tonic::DartByteData(source_byte_data),
                                  destination_offset_in_bytes);
}

References flutter::gpu::DeviceBuffer::Overwrite().