Fix `VK_ERROR_SURFACE_LOST_KHR`, `VK_ERROR_OUT_OF_POOL_MEMORY`, typos in shader names

- `VK_ERROR_SURFACE_LOST_KHR` was caused by the sdl window being
  dropped, it is now kept in gamestate to prevent that
- `VK_ERROR_OUT_OF_POOL_MEMORY` was caused by the descriptor pool having
  a hardcodes size for the number of descriptor sets instead of that number
  depending on the required number of sets

Note: We are still broken, a window opens and controls seem to work
      fine, but nothing is shown in the window

src/game/mod.rs

@@ -25,6 +25,7 @@ pub struct Camera {
 
 impl Game<InWorld> {
     pub fn main_loop(mut self) -> Game<RenderAvailable> {
+        println!("Starting main loop");
         let mut event_pump = self
             .state
             .sdl_context

src/main.rs

@@ -7,14 +7,13 @@ mod render;
 use ash::Device;
 use ash::Entry;
 use ash::Instance;
-use ash::khr::surface;
 use ash::vk;
 use game::Camera;
 use render::SwapchainCtx;
 use render::loading_world::Component;
 use render::loading_world::WorldComponent;
 use render::skybox::Skybox;
-use sdl2::Sdl;
+use sdl2::{Sdl, video::Window as SdlWindow};
 
 use std::collections::HashMap;
 
@@ -32,7 +31,6 @@ pub struct RenderCtx {
     pdev: vk::PhysicalDevice,
     dev: Device,
     surface: vk::SurfaceKHR,
-    surface_loader: surface::Instance,
     queue: vk::Queue,
     queue_idx: u32,
     cmd_buf: vk::CommandBuffer,
@@ -43,6 +41,7 @@ pub struct RenderCtx {
 pub struct Window {
     width: u32,
     height: u32,
+    _sdl: SdlWindow,
 }
 
 pub struct RenderAvailable {

src/render/cube.rs

@@ -277,11 +277,11 @@ impl Game<LoadingWorld> {
 
 fn load_cube_shaders(ctx: &RenderCtx) -> (vk::ShaderModule, vk::ShaderModule) {
     let shader_vert_shader = ctx.shader_mod_from_file(
-        "shaders/shader_vert.spv",
+        "shaders/cube_vert.spv",
         vk::ShaderModuleCreateFlags::empty(),
     );
     let shader_frag_shader = ctx.shader_mod_from_file(
-        "shaders/shader_rag.spv",
+        "shaders/cube_frag.spv",
         vk::ShaderModuleCreateFlags::empty(),
     );
 

src/render/in_world.rs

@@ -110,7 +110,7 @@ impl Game<InWorld> {
             state:
                 InWorld {
                     sdl_context,
-                    window: Window { width, height },
+                    window: Window { width, height, .. },
                     ctx: RenderCtx { dev, cmd_buf, .. },
                     skybox,
                     components,

src/render/init.rs

@@ -2,7 +2,6 @@ use std::ffi::{CStr, CString};
 
 use ash::{
     Device, Entry, Instance,
-    khr::surface,
     vk::{self},
 };
 use raw_window_handle::{HasDisplayHandle as _, HasWindowHandle as _};
@@ -43,19 +42,20 @@ impl Game<Unstarted> {
         let host_invis_idx =
             find_host_invisible(&instance, &pdev).expect("No host invisible memory found");
 
-        let surface_loader = surface::Instance::new(&entry, &instance);
-
         Game {
             state: RenderAvailable {
                 sdl_context,
-                window: crate::Window { width, height },
+                window: crate::Window {
+                    width,
+                    height,
+                    _sdl: window,
+                },
                 ctx: RenderCtx {
                     entry,
                     instance,
                     pdev,
                     dev,
                     surface,
-                    surface_loader,
                     queue,
                     queue_idx,
                     cmd_buf,

src/render/loading_world.rs

@@ -137,6 +137,7 @@ impl Game<LoadingWorld> {
     }
 
     pub fn start_world(self) -> Game<InWorld> {
+        println!("Starting world");
         let Self {
             state:
                 LoadingWorld {
@@ -153,7 +154,8 @@ impl Game<LoadingWorld> {
                     components,
                 },
         } = self;
-        let desc_pool = setup_desc_pool(&ctx, requested_descriptors);
+
+        let desc_pool = setup_desc_pool(&ctx, requested_descriptors, (components.len() + 1) as u32);
 
         let mut desc_sets = make_desc_sets(
             &ctx,
@@ -187,6 +189,8 @@ impl Game<LoadingWorld> {
         let sem_finish = ctx.make_sem();
         let fence_flight = ctx.make_fence();
 
+        println!("Starting world");
+
         Game {
             state: InWorld {
                 sdl_context,
@@ -284,6 +288,7 @@ fn setup_render_pass(ctx: &RenderCtx) -> vk::RenderPass {
 fn setup_desc_pool(
     ctx: &RenderCtx,
     requested_descriptors: HashMap<vk::DescriptorType, u32>,
+    num_sets: u32,
 ) -> vk::DescriptorPool {
     let pool_sizes = requested_descriptors
         .into_iter()
@@ -295,7 +300,7 @@ fn setup_desc_pool(
         .collect::<Vec<_>>();
 
     let pool_info = vk::DescriptorPoolCreateInfo::default()
-        .max_sets(1)
+        .max_sets(num_sets)
         .pool_sizes(&pool_sizes);
     let pool = unsafe {
         ctx.dev

src/render/skybox.rs

@@ -198,7 +198,7 @@ fn load_skybox_shaders(ctx: &RenderCtx) -> (vk::ShaderModule, vk::ShaderModule)
         vk::ShaderModuleCreateFlags::empty(),
     );
     let skybox_frag_shader = ctx.shader_mod_from_file(
-        "shaders/skybox_rag.spv",
+        "shaders/skybox_frag.spv",
         vk::ShaderModuleCreateFlags::empty(),
     );