impeller::PlaygroundImplVK Class Reference

#include <playground_impl_vk.h>

Inheritance diagram for impeller::PlaygroundImplVK:

Public Member Functions
	PlaygroundImplVK (PlaygroundSwitches switches)
	~PlaygroundImplVK ()
fml::Status	SetCapabilities (const std::shared_ptr< Capabilities > &capabilities) override
Public Member Functions inherited from impeller::PlaygroundImpl
virtual	~PlaygroundImpl ()
Vector2	GetContentScale () const
virtual Playground::GLProcAddressResolver	CreateGLProcAddressResolver () const

Static Public Member Functions
static bool	IsVulkanDriverPresent ()
Static Public Member Functions inherited from impeller::PlaygroundImpl
static std::unique_ptr< PlaygroundImpl >	Create (PlaygroundBackend backend, PlaygroundSwitches switches)

Additional Inherited Members
Public Types inherited from impeller::PlaygroundImpl
using	WindowHandle = void *
Protected Member Functions inherited from impeller::PlaygroundImpl
	PlaygroundImpl (PlaygroundSwitches switches)
Protected Attributes inherited from impeller::PlaygroundImpl
const PlaygroundSwitches	switches_

Detailed Description

Definition at line 13 of file playground_impl_vk.h.

Constructor & Destructor Documentation

PlaygroundImplVK()

impeller::PlaygroundImplVK::PlaygroundImplVK ( PlaygroundSwitches  switches )

explicit

Definition at line 62 of file playground_impl_vk.cc.

    : PlaygroundImpl(switches), handle_(nullptr, &DestroyWindowHandle) {
  FML_CHECK(IsVulkanDriverPresent());
 
  InitGlobalVulkanInstance();
 
  ::glfwDefaultWindowHints();
  ::glfwWindowHint(GLFW_CLIENT_API, GLFW_NO_API);
  ::glfwWindowHint(GLFW_VISIBLE, GLFW_FALSE);
 
  auto window = ::glfwCreateWindow(1, 1, "Test", nullptr, nullptr);
  if (!window) {
    VALIDATION_LOG << "Unable to create glfw window";
    return;
  }
 
  int width = 0;
  int height = 0;
  ::glfwGetWindowSize(window, &width, &height);
  size_ = ISize{width, height};
 
  handle_.reset(window);
 
  ContextVK::Settings context_settings;
  context_settings.proc_address_callback =
      reinterpret_cast<PFN_vkGetInstanceProcAddr>(
          &::glfwGetInstanceProcAddress);
  context_settings.shader_libraries_data = ShaderLibraryMappingsForPlayground();
  context_settings.cache_directory = fml::paths::GetCachesDirectory();
  context_settings.enable_validation = switches_.enable_vulkan_validation;
  context_settings.fatal_missing_validations =
      switches_.enable_vulkan_validation;
  ;
 
  auto context_vk = ContextVK::Create(std::move(context_settings));
  if (!context_vk || !context_vk->IsValid()) {
    VALIDATION_LOG << "Could not create Vulkan context in the playground.";
    return;
  }
 
  VkSurfaceKHR vk_surface;
  auto res = vk::Result{::glfwCreateWindowSurface(
      context_vk->GetInstance(),  // instance
      window,                     // window
      nullptr,                    // allocator
      &vk_surface                 // surface
      )};
  if (res != vk::Result::eSuccess) {
    VALIDATION_LOG << "Could not create surface for GLFW window: "
                   << vk::to_string(res);
    return;
  }
 
  vk::UniqueSurfaceKHR surface{vk_surface, context_vk->GetInstance()};
  auto context = context_vk->CreateSurfaceContext();
  if (!context->SetWindowSurface(std::move(surface), size_)) {
    VALIDATION_LOG << "Could not set up surface for context.";
    return;
  }
 
  context_ = std::move(context);
}

References impeller::ContextVK::Settings::cache_directory, impeller::ContextVK::Create(), impeller::ContextVK::Settings::enable_validation, impeller::PlaygroundSwitches::enable_vulkan_validation, impeller::ContextVK::Settings::fatal_missing_validations, IsVulkanDriverPresent(), impeller::ContextVK::Settings::proc_address_callback, impeller::ContextVK::Settings::shader_libraries_data, impeller::ShaderLibraryMappingsForPlayground(), impeller::PlaygroundImpl::switches_, and VALIDATION_LOG.

~PlaygroundImplVK()

impeller::PlaygroundImplVK::~PlaygroundImplVK ( )

default

Member Function Documentation

IsVulkanDriverPresent()

bool impeller::PlaygroundImplVK::IsVulkanDriverPresent ( )

static

Definition at line 220 of file playground_impl_vk.cc.

                                             {
  if (::glfwVulkanSupported()) {
    return true;
  }
#ifdef TARGET_OS_MAC
  FML_LOG(ERROR) << "Attempting to initialize a Vulkan playground on macOS "
                    "where Vulkan cannot be found. It can be installed via "
                    "MoltenVK and make sure to install it globally so "
                    "dlopen can find it.";
#else   // TARGET_OS_MAC
  FML_LOG(ERROR) << "Attempting to initialize a Vulkan playground on a system "
                    "that does not support Vulkan.";
#endif  // TARGET_OS_MAC
  return false;
}

Referenced by impeller::PlaygroundImpl::Create(), PlaygroundImplVK(), and impeller::Playground::SupportsBackend().

SetCapabilities()

fml::Status impeller::PlaygroundImplVK::SetCapabilities ( const std::shared_ptr< Capabilities > &  capabilities )

overridevirtual

Implements impeller::PlaygroundImpl.

Definition at line 213 of file playground_impl_vk.cc.

                                                     {
  return fml::Status(
      fml::StatusCode::kUnimplemented,
      "PlaygroundImplVK doesn't support setting the capabilities.");
}

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The documentation for this class was generated from the following files:

• impeller/playground/backend/vulkan/playground_impl_vk.h
• impeller/playground/backend/vulkan/playground_impl_vk.cc