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// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef FLUTTER_LIB_GPU_HOST_BUFFER_H_
#define FLUTTER_LIB_GPU_HOST_BUFFER_H_
#include "flutter/lib/gpu/export.h"
#include "flutter/lib/ui/dart_wrapper.h"
#include "impeller/core/buffer_view.h"
#include "impeller/core/host_buffer.h"
#include "lib/gpu/context.h"
#include "third_party/tonic/typed_data/dart_byte_data.h"
namespace flutter {
namespace gpu {
class HostBuffer : public RefCountedDartWrappable<HostBuffer> {
DEFINE_WRAPPERTYPEINFO();
FML_FRIEND_MAKE_REF_COUNTED(HostBuffer);
public:
explicit HostBuffer(Context* context);
~HostBuffer() override;
std::shared_ptr<impeller::HostBuffer> GetBuffer();
size_t EmplaceBytes(const tonic::DartByteData& byte_data);
std::optional<impeller::BufferView> GetBufferViewForOffset(size_t offset);
private:
size_t current_offset_ = 0;
std::shared_ptr<impeller::HostBuffer> host_buffer_;
std::unordered_map<size_t, impeller::BufferView> emplacements_;
FML_DISALLOW_COPY_AND_ASSIGN(HostBuffer);
};
} // namespace gpu
} // namespace flutter
//----------------------------------------------------------------------------
/// Exports
///
extern "C" {
FLUTTER_GPU_EXPORT
extern void InternalFlutterGpu_HostBuffer_Initialize(
Dart_Handle wrapper,
flutter::gpu::Context* context);
FLUTTER_GPU_EXPORT
extern size_t InternalFlutterGpu_HostBuffer_EmplaceBytes(
flutter::gpu::HostBuffer* wrapper,
Dart_Handle byte_data);
} // extern "C"
#endif // FLUTTER_LIB_GPU_HOST_BUFFER_H_