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#![deny(unsafe_code)]
use std::cell::OnceCell;
use vulkanalia::{ Entry, Instance };
use vulkanalia::loader::{ LibloadingLoader, LIBRARY };
use vulkanalia::vk::{ self, HasBuilder,
ApplicationInfo, InstanceCreateInfo,
DeviceV1_4, EntryV1_4, InstanceV1_4 };
use winit::dpi::LogicalSize;
use winit::application::ApplicationHandler;
use winit::event::WindowEvent;
use winit::event_loop::{ ActiveEventLoop, EventLoop };
use winit::window::{ Window, WindowAttributes, WindowId };
#[derive(Debug)]
struct Error {
message: String,
}
type Result<T> = std::result::Result<T, Error>;
impl std::fmt::Display for Error {
fn fmt(&self, fmt: &mut std::fmt::Formatter<'_>)
-> std::result::Result<(), std::fmt::Error>
{
fmt.write_str(&self.message)
}
}
impl From<winit::error::EventLoopError> for Error {
fn from(e: winit::error::EventLoopError) -> Self {
match e {
winit::error::EventLoopError::NotSupported(e) => Self::from(e),
winit::error::EventLoopError::Os(e) => Self::from(e),
winit::error::EventLoopError::RecreationAttempt => Error {
message:
"There may only ever be a single winit event loop.".to_string()
},
winit::error::EventLoopError::ExitFailure(code) => Error {
message:
format!("Clean unhappy exit with code {} via winit event loop",
code)
}
}
}
}
impl From<winit::error::NotSupportedError> for Error {
fn from(e: winit::error::NotSupportedError) -> Self {
Error {
message:
format!("The winit backend does not support an operation: {}",
e.to_string())
}
}
}
impl From<winit::error::OsError> for Error {
fn from(e: winit::error::OsError) -> Self {
Error {
message: format!("The OS told winit about an error: {}", e.to_string())
}
}
}
impl From<libloading::Error> for Error {
fn from(e: libloading::Error) -> Self {
Error {
message: format!("The dynamic object loader reported an error: {}",
e.to_string())
}
}
}
impl From<Box<dyn vulkanalia::loader::LoaderError>> for Error {
fn from(e: Box<dyn vulkanalia::loader::LoaderError>) -> Self {
Error {
message: format!("The Vulkan loader reported an error: {}",
e.to_string())
}
}
}
impl From<vulkanalia::vk::ErrorCode> for Error {
fn from(e: vulkanalia::vk::ErrorCode) -> Self {
Error {
message: format!("Vulkan gave an error code: {}", e.to_string())
}
}
}
fn ignore_errors(mut body: impl FnMut() -> Result<()>) -> () {
if let Err(e) = body() {
eprintln!("Error: {}", e);
}
}
struct Surreality {
window: OnceCell<Window>,
entry: OnceCell<Entry>,
instance: OnceCell<Instance>,
}
impl Surreality {
fn new() -> Self {
Surreality {
window: OnceCell::new(),
entry: OnceCell::new(),
instance: OnceCell::new(),
}
}
fn init_if_needed(&mut self, event_loop: &ActiveEventLoop) -> Result<()> {
if self.window.get().is_none() {
let window_attributes = WindowAttributes::default()
.with_title("Love, Curiosity, Justice")
.with_inner_size(LogicalSize::new(1024, 768));
let window: Window = event_loop.create_window(window_attributes)?;
let _ = self.window.set(window);
}
if self.entry.get().is_none() {
#[allow(unsafe_code)]
let loader = unsafe { LibloadingLoader::new(LIBRARY)? };
#[allow(unsafe_code)]
let entry = unsafe { Entry::new(loader)? };
let _ = self.entry.set(entry);
}
if self.instance.get().is_none() {
let application_info = ApplicationInfo::builder()
.application_name(b"Surreality\0")
.application_version(vk::make_version(1, 0, 0))
.engine_name(b"Surreality\0")
.engine_version(vk::make_version(1, 0, 0))
.api_version(vk::make_version(1, 0, 0));
let extensions = vulkanalia::window::get_required_instance_extensions(
self.window.get().unwrap())
.iter().map(|item| item.as_ptr()).collect::<Vec<_>>();
let instance_create_info = InstanceCreateInfo::builder()
.application_info(&application_info)
.enabled_extension_names(&extensions);
#[allow(unsafe_code)]
let instance = unsafe {
let entry = self.entry.get().unwrap();
entry.create_instance(&instance_create_info, None)?
};
let _ = self.instance.set(instance);
}
Ok(())
}
fn render(&mut self, window_id: WindowId) -> Result<()> {
if let Some(window) = self.window.get()
&& window_id == window.id()
{
println!("render the window");
} else {
println!("render something unknown");
}
Ok(())
}
}
impl ApplicationHandler for Surreality {
fn resumed(&mut self, event_loop: &ActiveEventLoop) {
ignore_errors(move || {
println!("resumed");
self.init_if_needed(event_loop)?;
Ok(())
});
}
fn window_event(&mut self, event_loop: &ActiveEventLoop,
window_id: WindowId, event: WindowEvent)
{
println!("window event {:?}", event);
match event {
WindowEvent::RedrawRequested => {
if !event_loop.exiting() {
if let Err(e) = self.render(window_id) {
eprintln!("Error: {}", e);
}
}
}
WindowEvent::CloseRequested => {
event_loop.exit();
}
_ => { }
}
}
}
fn main() -> std::process::ExitCode {
let body: fn() -> Result<()> = || {
let event_loop = EventLoop::new()?;
let mut surreality = Surreality::new();
event_loop.run_app(&mut surreality)?;
Ok(())
};
match body() {
Ok(()) => std::process::ExitCode::SUCCESS,
Err(e) => {
eprintln!("Error: {}", e);
std::process::ExitCode::from(1)
}
}
}
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