Method submit_frame

framework/hpp_api_vulkan_sample.cpp:506–555

}

void HPPApiVulkanSample::submit_frame()
{
	if (get_render_context().has_swapchain())
	{
		const auto &queue = get_device().get_queue_by_present(0);

		vk::SwapchainKHR swapchain = get_render_context().get_swapchain().get_handle();

		vk::PresentInfoKHR present_info{.swapchainCount = 1, .pSwapchains = &swapchain, .pImageIndices = &current_buffer};
		// Check if a wait semaphore has been specified to wait for before presenting the image
		if (semaphores.render_complete)
		{
			present_info.setWaitSemaphores(semaphores.render_complete);
		}

		vk::DisplayPresentInfoKHR disp_present_info;
		if (get_device().get_gpu().is_extension_supported(VK_KHR_DISPLAY_SWAPCHAIN_EXTENSION_NAME) &&
		    window->get_display_present_info(reinterpret_cast<VkDisplayPresentInfoKHR *>(&disp_present_info), extent.width, extent.height))
		{
			// Add display present info if supported and wanted
			present_info.setPNext(&disp_present_info);
		}

		// Shows how to filter an error code from a vulkan function, which is mapped to an exception but should be handled here!
		vk::Result present_result;
		try
		{
			present_result = queue.present(present_info);
		}
		catch (const vk::SystemError &e)
		{
			if (e.code() == vk::Result::eErrorOutOfDateKHR)
			{
				// Swap chain is no longer compatible with the surface and needs to be recreated
				resize(extent.width, extent.height);
				return;
			}
			else
			{
				// rethrow this error
				throw;
			}
		}
	}

	// DO NOT USE
	// vkDeviceWaitIdle and vkQueueWaitIdle are extremely expensive functions, and are used here purely for demonstrating the vulkan API
	// without having to concern ourselves with proper syncronization. These functions should NEVER be used inside the render loop like this (every frame).
	get_device().get_queue_by_present(0).get_handle().waitIdle();
}

HPPApiVulkanSample::~HPPApiVulkanSample()
{