chromium/third_party/dawn/include/dawn/native/VulkanBackend.h

// Copyright 2018 The Dawn & Tint Authors
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#ifndef INCLUDE_DAWN_NATIVE_VULKANBACKEND_H_
#define INCLUDE_DAWN_NATIVE_VULKANBACKEND_H_

#include <vulkan/vulkan.h>

#include <array>
#include <vector>

#include "dawn/native/DawnNative.h"

namespace dawn::native::vulkan {

DAWN_NATIVE_EXPORT VkInstance GetInstance(WGPUDevice device);

DAWN_NATIVE_EXPORT PFN_vkVoidFunction GetInstanceProcAddr(WGPUDevice device, const char* pName);

enum class NeedsDedicatedAllocation { … };

struct DAWN_NATIVE_EXPORT ExternalImageDescriptorVk : ExternalImageDescriptor { … };

struct ExternalImageExportInfoVk : ExternalImageExportInfo { … };

// Can't use DAWN_PLATFORM_IS(LINUX) since header included in both Dawn and Chrome
#if defined(__linux__) || defined(__Fuchsia__)

// Common properties of external images represented by FDs. On successful import the file
// descriptor's ownership is transferred to the Dawn implementation and they shouldn't be
// used outside of Dawn again. TODO(enga): Also transfer ownership in the error case so the
// caller can assume the FD is always consumed.
struct DAWN_NATIVE_EXPORT ExternalImageDescriptorFD : ExternalImageDescriptorVk { … };

// Descriptor for opaque file descriptor image import
struct DAWN_NATIVE_EXPORT ExternalImageDescriptorOpaqueFD : ExternalImageDescriptorFD { … };

// The plane-wise offset and stride.
struct DAWN_NATIVE_EXPORT PlaneLayout { … };

// Descriptor for dma-buf file descriptor image import
struct DAWN_NATIVE_EXPORT ExternalImageDescriptorDmaBuf : ExternalImageDescriptorFD { … };

// Info struct that is written to in |ExportVulkanImage|.
struct DAWN_NATIVE_EXPORT ExternalImageExportInfoFD : ExternalImageExportInfoVk { … };

struct DAWN_NATIVE_EXPORT ExternalImageExportInfoOpaqueFD : ExternalImageExportInfoFD { … };

struct DAWN_NATIVE_EXPORT ExternalImageExportInfoDmaBuf : ExternalImageExportInfoFD { … };

#ifdef __ANDROID__

// Descriptor for AHardwareBuffer image import
struct DAWN_NATIVE_EXPORT ExternalImageDescriptorAHardwareBuffer : ExternalImageDescriptorVk {
  public:
    ExternalImageDescriptorAHardwareBuffer();

    struct AHardwareBuffer* handle;  // The AHardwareBuffer which contains the memory of the image
    std::vector<int> waitFDs;        // File descriptors of semaphores which will be waited on

  protected:
    using ExternalImageDescriptorVk::ExternalImageDescriptorVk;
};

struct DAWN_NATIVE_EXPORT ExternalImageExportInfoAHardwareBuffer : ExternalImageExportInfoFD {
    ExternalImageExportInfoAHardwareBuffer();
};

#endif  // __ANDROID__

#endif  // defined(__linux__) || defined(__Fuchsia__)

// Imports external memory into a Vulkan image. Internally, this uses external memory /
// semaphore extensions to import the image and wait on the provided synchronizaton
// primitives before the texture can be used.
// On failure, returns a nullptr.
DAWN_NATIVE_EXPORT WGPUTexture WrapVulkanImage(WGPUDevice device,
                                               const ExternalImageDescriptorVk* descriptor);

// Exports external memory from a Vulkan image. This must be called on wrapped textures
// before they are destroyed. It writes the semaphore to wait on and the old/new image
// layouts to |info|. Pass VK_IMAGE_LAYOUT_UNDEFINED as |desiredLayout| if you don't want to
// perform a layout transition.
DAWN_NATIVE_EXPORT bool ExportVulkanImage(WGPUTexture texture,
                                          VkImageLayout desiredLayout,
                                          ExternalImageExportInfoVk* info);
// |ExportVulkanImage| with default desiredLayout of VK_IMAGE_LAYOUT_UNDEFINED.
DAWN_NATIVE_EXPORT bool ExportVulkanImage(WGPUTexture texture, ExternalImageExportInfoVk* info);

}  // namespace dawn::native::vulkan

#endif  // INCLUDE_DAWN_NATIVE_VULKANBACKEND_H_