Method prepare

samples/performance/subpasses/subpasses.cpp:106–169

}

bool Subpasses::prepare(const vkb::ApplicationOptions &options)
{
	if (!VulkanSample::prepare(options))
	{
		return false;
	}

	std::set<VkImageUsageFlagBits> usage = {VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT, VK_IMAGE_USAGE_INPUT_ATTACHMENT_BIT};
	get_render_context().update_swapchain(usage);

	load_scene("scenes/sponza/Sponza01.gltf");

	get_scene().clear_components<vkb::sg::Light>();

	auto light_pos   = glm::vec3(0.0f, 128.0f, -225.0f);
	auto light_color = glm::vec3(1.0, 1.0, 1.0);

	// Magic numbers used to offset lights in the Sponza scene
	for (int i = -4; i < 4; ++i)
	{
		for (int j = 0; j < 2; ++j)
		{
			glm::vec3 pos = light_pos;
			pos.x += i * 400;
			pos.z += j * (225 + 140);
			pos.y = 8;

			for (int k = 0; k < 3; ++k)
			{
				pos.y = pos.y + (k * 100);

				light_color.x = static_cast<float>(rand()) / (RAND_MAX);
				light_color.y = static_cast<float>(rand()) / (RAND_MAX);
				light_color.z = static_cast<float>(rand()) / (RAND_MAX);

				vkb::sg::LightProperties props;
				props.color     = light_color;
				props.intensity = 0.2f;

				vkb::add_point_light(get_scene(), pos, props);
			}
		}
	}

	auto &camera_node = vkb::add_free_camera(get_scene(), "main_camera", get_render_context().get_surface_extent());
	camera            = dynamic_cast<vkb::sg::PerspectiveCamera *>(&camera_node.get_component<vkb::sg::Camera>());

	render_pipeline = create_one_renderpass_two_subpasses();

	geometry_render_pipeline = create_geometry_renderpass();
	lighting_render_pipeline = create_lighting_renderpass();

	// Enable stats
	get_stats().request_stats({vkb::StatIndex::frame_times,
	                           vkb::StatIndex::gpu_fragment_jobs,
	                           vkb::StatIndex::gpu_tiles,
	                           vkb::StatIndex::gpu_ext_read_bytes,
	                           vkb::StatIndex::gpu_ext_write_bytes});