C++ (Cpp) semaphore::signal_host Examples

Example #1

File: ste_presentation_surface.cpp Project: ssteinberg/ste

ste_presentation_surface::acquire_next_image_return_t  ste_presentation_surface::acquire_swapchain_image_impl(
	std::uint64_t timeout_ns,
	semaphore &presentation_image_ready_semaphore,
	const vk::vk_fence<> *presentation_image_ready_fence) const
{
	acquire_next_image_return_t ret;
	vk::vk_result res = vkAcquireNextImageKHR(*presentation_device,
											  *swap_chain,
											  timeout_ns,
											  presentation_image_ready_semaphore ? static_cast<VkSemaphore>(*presentation_image_ready_semaphore) : vk::vk_null_handle,
											  presentation_image_ready_fence ? static_cast<VkFence>(*presentation_image_ready_fence) : vk::vk_null_handle,
											  &ret.image_index);

	// Host signal semaphore
	presentation_image_ready_semaphore.signal_host();

	switch (res.get()) {
	case VK_SUBOPTIMAL_KHR:
		ret.sub_optimal = true;
	case VK_SUCCESS:
		ret.image = &swap_chain_images[ret.image_index];
		break;
	case VK_ERROR_OUT_OF_DATE_KHR:
		ret.sub_optimal = true;
		break;
	default:
		throw vk::vk_exception(res);
	}

	// Furthermore raise flag to recreate swap-chain
	if (res != VK_SUCCESS)
		shared_data.swap_chain_optimal_flag.clear(std::memory_order_release);

	return ret;
}