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#![deny(unsafe_code)]
use crate::error::*;
use crate::graphics_permanent::PermanentGraphicsState;
use crate::graphics_window_dressing::{
WindowDressing, N_SIMULTANEOUS_FRAMES
};
use std::cell::RefCell;
use vulkanalia::vk::{ self, Handle, HasBuilder, DeviceV1_0,
KhrSwapchainExtensionDeviceCommands };
use winit::application::ApplicationHandler;
use winit::event::WindowEvent;
use winit::event_loop::{ ActiveEventLoop, EventLoop };
use winit::window::WindowId;
mod error;
mod graphics_permanent;
mod graphics_window_dressing;
struct Surreality {
permanent: RefCell<Option<PermanentGraphicsState>>,
window_dressing: RefCell<Option<WindowDressing>>,
frame_index: usize,
}
impl Surreality {
fn new() -> Self {
Surreality {
permanent: RefCell::new(None),
window_dressing: RefCell::new(None),
frame_index: 0,
}
}
#[allow(unsafe_code)]
fn init(&mut self, event_loop: &ActiveEventLoop) -> Result<()> {
let (permanent, physical_device, indices, enable_swapchain)
= PermanentGraphicsState::new(event_loop)?;
if enable_swapchain.0 {
*self.window_dressing.get_mut()
= Some(WindowDressing::new(&permanent, physical_device, indices)?);
}
*self.permanent.get_mut() = Some(permanent);
Ok(())
}
#[allow(unsafe_code)]
fn render(&mut self, window_id: WindowId) -> Result<()> {
if let Some(permanent) = self.permanent.borrow().as_ref()
&& let Some(window_dressing)
= self.window_dressing.borrow_mut().as_mut()
&& window_id == permanent.window.id()
{
let device = &permanent.device;
let frame_index = self.frame_index;
let concurrency = &mut window_dressing.concurrency;
let image_available_semaphore
= &concurrency.image_available_semaphores[frame_index];
let rendering_finished_semaphore
= &concurrency.rendering_finished_semaphores[frame_index];
let frame_fence = &concurrency.frame_fences[frame_index];
unsafe { device.wait_for_fences(&[*frame_fence], true, u64::MAX) }?;
let image_index = unsafe {
device.acquire_next_image_khr(window_dressing.swapchain.swapchain,
u64::MAX, *image_available_semaphore,
vk::Fence::null())
}?.0 as usize;
let image_fence = &concurrency.image_fences[image_index];
if !image_fence.is_null() {
unsafe { device.wait_for_fences(&[*image_fence], true, u64::MAX) }?;
}
concurrency.image_fences[image_index] = *frame_fence;
let first_semaphores = [*image_available_semaphore];
let second_semaphores = [*rendering_finished_semaphore];
let wait_stages = [vk::PipelineStageFlags::COLOR_ATTACHMENT_OUTPUT];
let command_buffers = [window_dressing.command_buffers[image_index]];
let submit_info = vk::SubmitInfo::builder()
.wait_semaphores(&first_semaphores)
.wait_dst_stage_mask(&wait_stages)
.command_buffers(&command_buffers)
.signal_semaphores(&second_semaphores);
unsafe { device.reset_fences(&[*frame_fence]) }?;
unsafe {
device.queue_submit(permanent.graphics_queue,
&[submit_info],
*frame_fence)
}?;
let swapchains = [window_dressing.swapchain.swapchain];
let image_indices = [image_index as u32];
let present_info = vk::PresentInfoKHR::builder()
.wait_semaphores(&second_semaphores)
.swapchains(&swapchains)
.image_indices(&image_indices);
unsafe {
device.queue_present_khr(permanent.presentation_queue, &present_info)
}?;
self.frame_index = (frame_index + 1) % N_SIMULTANEOUS_FRAMES;
}
Ok(())
}
}
impl Drop for Surreality {
#[allow(unsafe_code)]
fn drop(&mut self) {
if let Some(permanent) = self.permanent.replace(None) {
unsafe { permanent.device.device_wait_idle() }.unwrap();
if let Some(window_dressing) = self.window_dressing.replace(None) {
window_dressing.destroy(&permanent);
}
permanent.destroy();
}
}
}
impl ApplicationHandler for Surreality {
fn resumed(&mut self, event_loop: &ActiveEventLoop) {
ignore_errors(move || {
self.init(event_loop)?;
Ok(())
});
}
fn window_event(&mut self, event_loop: &ActiveEventLoop,
window_id: WindowId, event: WindowEvent)
{
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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