device_buffer_vk.h

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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_IMPELLER_RENDERER_BACKEND_VULKAN_DEVICE_BUFFER_VK_H_
#define FLUTTER_IMPELLER_RENDERER_BACKEND_VULKAN_DEVICE_BUFFER_VK_H_
 
#include <memory>
 
#include "impeller/base/backend_cast.h"
#include "impeller/core/device_buffer.h"
#include "impeller/renderer/backend/vulkan/resource_manager_vk.h"
#include "impeller/renderer/backend/vulkan/vma.h"
 
namespace impeller {
 
class DeviceBufferVK final : public DeviceBuffer,
                             public BackendCast<DeviceBufferVK, DeviceBuffer> {
 public:
  DeviceBufferVK(DeviceBufferDescriptor desc,
                 std::weak_ptr<Context> context,
                 UniqueBufferVMA buffer,
                 VmaAllocationInfo info,
                 bool is_host_coherent);
 
  // |DeviceBuffer|
  ~DeviceBufferVK() override;
 
  vk::Buffer GetBuffer() const;
 
  // Visible for testing.
  bool IsHostCoherent() const;
 
 private:
  friend class AllocatorVK;
 
  struct BufferResource {
    UniqueBufferVMA buffer;
    VmaAllocationInfo info = {};
 
    BufferResource() = default;
 
    BufferResource(UniqueBufferVMA p_buffer, VmaAllocationInfo p_info)
        : buffer(std::move(p_buffer)), info(p_info) {}
 
    BufferResource(BufferResource&& o) {
      std::swap(o.buffer, buffer);
      std::swap(o.info, info);
    }
 
    BufferResource(const BufferResource&) = delete;
 
    BufferResource& operator=(const BufferResource&) = delete;
  };
 
  std::weak_ptr<Context> context_;
  UniqueResourceVKT<BufferResource> resource_;
  bool is_host_coherent_ = false;
 
  // |DeviceBuffer|
  uint8_t* OnGetContents() const override;
 
  // |DeviceBuffer|
  bool OnCopyHostBuffer(const uint8_t* source,
                        Range source_range,
                        size_t offset) override;
 
  // |DeviceBuffer|
  bool SetLabel(std::string_view label) override;
 
  // |DeviceBuffer|
  bool SetLabel(std::string_view label, Range range) override;
 
  // |DeviceBuffer|
  void Flush(std::optional<Range> range) const override;
 
  // |DeviceBuffer|
  void Invalidate(std::optional<Range> range) const override;
 
  DeviceBufferVK(const DeviceBufferVK&) = delete;
 
  DeviceBufferVK& operator=(const DeviceBufferVK&) = delete;
};
 
}  // namespace impeller
 
#endif  // FLUTTER_IMPELLER_RENDERER_BACKEND_VULKAN_DEVICE_BUFFER_VK_H_