Method prepare

samples/api/hpp_hello_triangle/hpp_hello_triangle.cpp:154–197

}

bool HPPHelloTriangle::prepare(const vkb::ApplicationOptions &options)
{
	// Headless is not supported to keep this sample as simple as possible
	assert(options.window != nullptr);
	assert(options.window->get_window_mode() != vkb::Window::Mode::Headless);

	if (Application::prepare(options))
	{
		instance = create_instance({VK_KHR_SURFACE_EXTENSION_NAME}, {});
#if defined(VKB_DEBUG) || defined(VKB_VALIDATION_LAYERS)
		debug_utils_messenger = instance.createDebugUtilsMessengerEXT(debug_utils_create_info);
#endif

		select_physical_device_and_surface();

		const vkb::Window::Extent &extent = options.window->get_extent();
		swapchain_data.extent.width       = extent.width;
		swapchain_data.extent.height      = extent.height;

		// create a device
		device = create_device({VK_KHR_SWAPCHAIN_EXTENSION_NAME});

		// get the (graphics) queue
		queue = device.getQueue(graphics_queue_index, 0);

		vma_allocator                                     = create_vma_allocator();
		std::tie(vertex_buffer, vertex_buffer_allocation) = create_vertex_buffer();

		init_swapchain();

		// Create the necessary objects for rendering.
		render_pass = create_render_pass();

		// Create a blank pipeline layout.
		// We are not binding any resources to the pipeline in this first sample.
		pipeline_layout = device.createPipelineLayout({});

		pipeline = create_graphics_pipeline();

		init_framebuffers();
	}

	return true;
}

void HPPHelloTriangle::update(float delta_time)
{