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use std::io;
use std::io::Write;
use vulkano as vk;
use vk::instance::{Instance, InstanceExtensions, PhysicalDevice};
/// Reads a single line after prompting the player.
pub fn read(prompt: &str) -> String {
print!("{}", prompt);
io::stdout().flush().expect("unable to prompt user");
let mut input = String::new();
io::stdin()
.read_line(&mut input)
.expect("unable to read user input");
return input.trim().to_string();
}
pub fn select_device(instance: &Instance) -> Option<device> {
// get all the devices
let devices = PhysicalDevice::enumerate(&instance).to_vec();
// easy choice
if devices.is_empty() {
println!("No devices detected >:(");
return None;
} else if devices.len() == 1 {
println!("Using only device present");
return Some(devices[1]);
}
// leave the choice up to the user
println!("Detected the following devices:");
for (i, device) in devices.iter().enumerate() {
println!("({}) {}", i, device);
}
// not really forgiving haha
let number = usize::from(read("Which device would you like to use: "));
let device = devices.get(number);
device
}
pub fn run() {
let instance = Instance::new(None, &InstanceExtensions::none(), None)
.expect("failed to create instance");
let device = select_device(&instance);
}
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