// 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.

#include "flutter/shell/platform/embedder/embedder_surface_vulkan.h"

#include <utility>

#include "flutter/flutter_vma/flutter_skia_vma.h"
#include "flutter/shell/common/shell_io_manager.h"
#include "flutter/vulkan/vulkan_skia_proc_table.h"
#include "include/gpu/GrDirectContext.h"
#include "include/gpu/vk/GrVkBackendContext.h"
#include "include/gpu/vk/GrVkExtensions.h"
#include "shell/gpu/gpu_surface_vulkan.h"
#include "shell/gpu/gpu_surface_vulkan_delegate.h"

namespace flutter {

EmbedderSurfaceVulkan::EmbedderSurfaceVulkan(
    uint32_t version,
    VkInstance instance,
    size_t instance_extension_count,
    const char** instance_extensions,
    size_t device_extension_count,
    const char** device_extensions,
    VkPhysicalDevice physical_device,
    VkDevice device,
    uint32_t queue_family_index,
    VkQueue queue,
    const VulkanDispatchTable& vulkan_dispatch_table,
    std::shared_ptr<EmbedderExternalViewEmbedder> external_view_embedder)
    : vk_(fml::MakeRefCounted<vulkan::VulkanProcTable>(
          vulkan_dispatch_table.get_instance_proc_address)),
      device_(*vk_,
              vulkan::VulkanHandle<VkPhysicalDevice>{physical_device},
              vulkan::VulkanHandle<VkDevice>{device},
              queue_family_index,
              vulkan::VulkanHandle<VkQueue>{queue}),
      vulkan_dispatch_table_(vulkan_dispatch_table),
      external_view_embedder_(std::move(external_view_embedder)) {
  // Make sure all required members of the dispatch table are checked.
  if (!vulkan_dispatch_table_.get_instance_proc_address ||
      !vulkan_dispatch_table_.get_next_image ||
      !vulkan_dispatch_table_.present_image) {
    return;
  }

  bool success = vk_->SetupInstanceProcAddresses(
      vulkan::VulkanHandle<VkInstance>{instance});
  if (!success) {
    FML_LOG(ERROR) << "Could not setup instance proc addresses.";
    return;
  }
  success =
      vk_->SetupDeviceProcAddresses(vulkan::VulkanHandle<VkDevice>{device});
  if (!success) {
    FML_LOG(ERROR) << "Could not setup device proc addresses.";
    return;
  }
  if (!vk_->IsValid()) {
    FML_LOG(ERROR) << "VulkanProcTable invalid.";
    return;
  }

  main_context_ = CreateGrContext(instance, version, instance_extension_count,
                                  instance_extensions, device_extension_count,
                                  device_extensions, ContextType::kRender);
  // TODO(96954): Add a second (optional) queue+family index to the Embedder API
  //              to allow embedders to specify a dedicated transfer queue for
  //              use by the resource context. Queue families with graphics
  //              capability can always be used for memory transferring, but it
  //              would be advantageous to use a dedicated transter queue here.
  resource_context_ = CreateGrContext(
      instance, version, instance_extension_count, instance_extensions,
      device_extension_count, device_extensions, ContextType::kResource);

  valid_ = main_context_ && resource_context_;
}

EmbedderSurfaceVulkan::~EmbedderSurfaceVulkan() {
  if (main_context_) {
    main_context_->releaseResourcesAndAbandonContext();
  }
  if (resource_context_) {
    resource_context_->releaseResourcesAndAbandonContext();
  }
}

// |GPUSurfaceVulkanDelegate|
const vulkan::VulkanProcTable& EmbedderSurfaceVulkan::vk() {
  return *vk_;
}

// |GPUSurfaceVulkanDelegate|
FlutterVulkanImage EmbedderSurfaceVulkan::AcquireImage(const SkISize& size) {
  return vulkan_dispatch_table_.get_next_image(size);
}

// |GPUSurfaceVulkanDelegate|
bool EmbedderSurfaceVulkan::PresentImage(VkImage image, VkFormat format) {
  return vulkan_dispatch_table_.present_image(image, format);
}

// |EmbedderSurface|
bool EmbedderSurfaceVulkan::IsValid() const {
  return valid_;
}

// |EmbedderSurface|
std::unique_ptr<Surface> EmbedderSurfaceVulkan::CreateGPUSurface() {
  const bool render_to_surface = !external_view_embedder_;
  return std::make_unique<GPUSurfaceVulkan>(this, main_context_,
                                            render_to_surface);
}

// |EmbedderSurface|
sk_sp<GrDirectContext> EmbedderSurfaceVulkan::CreateResourceContext() const {
  return resource_context_;
}

sk_sp<GrDirectContext> EmbedderSurfaceVulkan::CreateGrContext(
    VkInstance instance,
    uint32_t version,
    size_t instance_extension_count,
    const char** instance_extensions,
    size_t device_extension_count,
    const char** device_extensions,
    ContextType context_type) const {
  uint32_t skia_features = 0;
  if (!device_.GetPhysicalDeviceFeaturesSkia(&skia_features)) {
    FML_LOG(ERROR) << "Failed to get physical device features.";

    return nullptr;
  }

  auto get_proc = CreateSkiaGetProc(vk_);
  if (get_proc == nullptr) {
    FML_LOG(ERROR) << "Failed to create Vulkan getProc for Skia.";
    return nullptr;
  }

  GrVkExtensions extensions;

  GrVkBackendContext backend_context = {};
  backend_context.fInstance = instance;
  backend_context.fPhysicalDevice = device_.GetPhysicalDeviceHandle();
  backend_context.fDevice = device_.GetHandle();
  backend_context.fQueue = device_.GetQueueHandle();
  backend_context.fGraphicsQueueIndex = device_.GetGraphicsQueueIndex();
  backend_context.fMinAPIVersion = version;
  backend_context.fMaxAPIVersion = version;
  backend_context.fFeatures = skia_features;
  backend_context.fVkExtensions = &extensions;
  backend_context.fGetProc = get_proc;
  backend_context.fOwnsInstanceAndDevice = false;

  uint32_t vulkan_api_version = version;
  sk_sp<skgpu::VulkanMemoryAllocator> allocator =
      flutter::FlutterSkiaVulkanMemoryAllocator::Make(
          vulkan_api_version, instance, device_.GetPhysicalDeviceHandle(),
          device_.GetHandle(), vk_, true);

  backend_context.fMemoryAllocator = allocator;

  extensions.init(backend_context.fGetProc, backend_context.fInstance,
                  backend_context.fPhysicalDevice, instance_extension_count,
                  instance_extensions, device_extension_count,
                  device_extensions);

  GrContextOptions options =
      MakeDefaultContextOptions(context_type, GrBackendApi::kVulkan);
  options.fReduceOpsTaskSplitting = GrContextOptions::Enable::kNo;
  return GrDirectContext::MakeVulkan(backend_context, options);
}

}  // namespace flutter