| Flutter Impeller |

Public Member Functions | Public Attributes | List of all members
impeller::KHRFrameSynchronizerVK Struct Reference

## Public Member Functions
| KHRFrameSynchronizerVK (const vk::Device &device)
| ~KHRFrameSynchronizerVK ()=default
bool | WaitForFence (const vk::Device &device)

## Public Attributes
vk::UniqueFence | acquire
vk::UniqueSemaphore | render_ready
vk::UniqueSemaphore | present_ready
std::shared_ptr< CommandBuffer > | final_cmd_buffer
bool | is_valid = false

## Detailed Description

Definition at line 28 of file khr_swapchain_impl_vk.cc.

## Constructor & Destructor Documentation

## ◆ KHRFrameSynchronizerVK()

impeller::KHRFrameSynchronizerVK::KHRFrameSynchronizerVK | ( | const vk::Device & | device | ) |
| inline explicit

Definition at line 35 of file khr_swapchain_impl_vk.cc.

35 {
36 auto acquire_res = device.createFenceUnique(
37 vk::FenceCreateInfo{vk::FenceCreateFlagBits::eSignaled});
38 auto render_res = device.createSemaphoreUnique({});
39 auto present_res = device.createSemaphoreUnique({});
40 if (acquire_res.result != vk::Result::eSuccess ||
41 render_res.result != vk::Result::eSuccess ||
42 present_res.result != vk::Result::eSuccess) {
43 VALIDATION_LOG << "Could not create synchronizer.";
44 return;
45 }
46 acquire = std::move(acquire_res.value);
47 render_ready = std::move(render_res.value);
48 present_ready = std::move(present_res.value);
49 is_valid = true;
50 }

References acquire, is_valid, present_ready, render_ready, and VALIDATION_LOG.

## ◆ ~KHRFrameSynchronizerVK()

impeller::KHRFrameSynchronizerVK::~KHRFrameSynchronizerVK | ( |  | ) |
| default

## Member Function Documentation

## ◆ WaitForFence()

bool impeller::KHRFrameSynchronizerVK::WaitForFence | ( | const vk::Device & | device | ) |
| inline

Definition at line 54 of file khr_swapchain_impl_vk.cc.

54 {
55 if (auto result = device.waitForFences(
56 *acquire, // fence
57 true, // wait all
58 std::numeric_limits<uint64_t>::max() // timeout (ns)
59 );
60 result != vk::Result::eSuccess) {
61 VALIDATION_LOG << "Fence wait failed: " << vk::to_string(result);
62 return false;
63 }
64 if (auto result = device.resetFences(*acquire);
65 result != vk::Result::eSuccess) {
66 VALIDATION_LOG << "Could not reset fence: " << vk::to_string(result);
67 return false;
68 }
69 return true;
70 }

References acquire, and VALIDATION_LOG.

## Member Data Documentation

## ◆ acquire

vk::UniqueFence impeller::KHRFrameSynchronizerVK::acquire

Definition at line 29 of file khr_swapchain_impl_vk.cc.

Referenced by KHRFrameSynchronizerVK(), and WaitForFence().

## ◆ final_cmd_buffer

std::shared_ptr<CommandBuffer> impeller::KHRFrameSynchronizerVK::final_cmd_buffer

Definition at line 32 of file khr_swapchain_impl_vk.cc.

## ◆ is_valid

bool impeller::KHRFrameSynchronizerVK::is_valid = false

Definition at line 33 of file khr_swapchain_impl_vk.cc.

Referenced by KHRFrameSynchronizerVK().

## ◆ present_ready

vk::UniqueSemaphore impeller::KHRFrameSynchronizerVK::present_ready

Definition at line 31 of file khr_swapchain_impl_vk.cc.

Referenced by KHRFrameSynchronizerVK().

## ◆ render_ready

vk::UniqueSemaphore impeller::KHRFrameSynchronizerVK::render_ready

Definition at line 30 of file khr_swapchain_impl_vk.cc.

Referenced by KHRFrameSynchronizerVK().

The documentation for this struct was generated from the following file:

- impeller/renderer/backend/vulkan/swapchain/khr/khr_swapchain_impl_vk.cc

impeller::KHRFrameSynchronizerVK::acquire
vk::UniqueFence acquire
Definition: khr_swapchain_impl_vk.cc:29
impeller::KHRFrameSynchronizerVK::render_ready
vk::UniqueSemaphore render_ready
Definition: khr_swapchain_impl_vk.cc:30
VALIDATION_LOG
#define VALIDATION_LOG
Definition: validation.h:73
impeller::KHRFrameSynchronizerVK::present_ready
vk::UniqueSemaphore present_ready
Definition: khr_swapchain_impl_vk.cc:31
impeller::KHRFrameSynchronizerVK::is_valid
bool is_valid
Definition: khr_swapchain_impl_vk.cc:33