Refactor Vulkan device and instance handling

Refactor Vulkan initialization to merge logical and physical device management into a unified `VkDevice` struct. Improved logging for Vulkan instance creation and surface management. Added methods to `VkPhysicalDevice` and `VkSurface` for more detailed querying of physical device capabilities.

src/display/app.rs

@@ -1,61 +1,22 @@
-use std::fmt::{Display, Formatter};
-use ash::vk::QueueFlags;
 use winit::application::ApplicationHandler;
 use winit::event::WindowEvent;
 use winit::event_loop::ActiveEventLoop;
 use winit::window::{WindowId};
 use crate::display::window::Window;
-use crate::vulkan::{VkInstance, VkPhysicalDevice};
+use crate::vulkan::VkRenderContext;
 
 pub struct App {
     window: Window,
-    instance: Option<VkInstance>
+    render_context: Option<VkRenderContext>,
 }
 
 impl App {
     pub fn new(window: Window) -> Self {
         Self {
             window,
-            instance: None
+            render_context: None,
         }
     }
-
-    fn init_vulkan(&mut self) {
-        let required_extensions = self.window
-            .required_extensions()
-            .expect("Unable to get required required extensions");
-
-        log::info!("Initializing Vulkan instance");
-        let instance = VkInstance::new(&required_extensions);
-        log::info!("Vulkan instance created");
-        log::info!("{instance}");
-
-        let surface = instance.create_surface(&self.window)
-            .expect("Unable to create surface");
-
-        let mut physical_devices = instance.get_physical_devices();
-        physical_devices.sort_by(|a, b| b.priority().cmp(&a.priority()));
-
-        let (physical_device, queue_family_index) = physical_devices
-            .iter()
-            .find_map(|physical_device| {
-                physical_device.queue_family_properties
-                    .iter()
-                    .enumerate()
-                    .find_map(|(index, queue_family_property)| {
-                        if surface.physical_device_queue_supported(physical_device, index as u32).unwrap_or(false) {
-                            Some((physical_device, index as u32))
-                        } else {
-                            None
-                        }
-                    })
-            })
-            .expect("Unable to find suitable device");
-
-
-        self.instance = Some(instance);
-
-    }
 }
 
 impl ApplicationHandler for App {
@@ -64,13 +25,13 @@ impl ApplicationHandler for App {
             .map_err(|err| format!("Failed to create window: {}", err))
             .unwrap();
 
-        self.init_vulkan();
+        self.render_context = VkRenderContext::init(&self.window).ok();
     }
 
     fn window_event(&mut self, event_loop: &ActiveEventLoop, id: WindowId, event: WindowEvent) {
         match event {
             WindowEvent::CloseRequested => {
-                log::info!("The close button was pressed; stopping");
+                log::debug!("The close button was pressed; stopping");
                 event_loop.exit();
             }
             _ => self.window.window_event(event_loop, id, event),

src/display/window.rs

@@ -28,7 +28,7 @@ impl Window {
     pub fn required_extensions(&self) -> anyhow::Result<Vec<*const c_char>> {
         let display_handle = self.handle
             .as_ref()
-            .ok_or_else(||anyhow::anyhow!("Window not found"))?
+            .ok_or_else(|| anyhow::anyhow!("Window not found"))?
             .display_handle()?;
 
         #[allow(unused_mut)]

src/vulkan/mod.rs

@@ -1,8 +1,16 @@
-pub(self) mod vk_instance;
-pub(self) mod vk_physical_device;
-pub(self) mod vk_logical_device;
-mod utils;
-mod vk_surface;
+pub(self) mod vk_render_context;
+pub use vk_render_context::VkRenderContext;
 
+pub(self) mod vk_instance;
 pub use vk_instance::VkInstance;
-pub use vk_physical_device::VkPhysicalDevice;
+
+pub(self) mod vk_surface;
+pub use vk_surface::VkSurface;
+
+pub(self) mod vk_physical_device;
+pub use vk_physical_device::VkPhysicalDevice;
+
+pub(self) mod vk_device;
+pub use vk_device::VkDevice;
+
+mod utils;

src/vulkan/vk_device.rs

@@ -0,0 +1,57 @@
+use ash::vk;
+use crate::vulkan::{VkInstance, VkPhysicalDevice};
+
+pub struct VkDevice {
+    handle: ash::Device,
+    queue_family_index: u32
+}
+
+impl VkDevice {
+    pub fn new_graphics_device(
+        instance: &VkInstance,
+        physical_device: &VkPhysicalDevice,
+        queue_family_index: u32,
+    ) -> anyhow::Result<Self> {
+        let device_extension_names_raw = [
+            ash::khr::swapchain::NAME.as_ptr(),
+            #[cfg(any(target_os = "macos", target_os = "ios"))]
+            ash::khr::portability_subset::NAME.as_ptr(),
+        ];
+        let features = vk::PhysicalDeviceFeatures {
+            shader_clip_distance: 1,
+            ..Default::default()
+        };
+        let priorities = [1.0];
+
+        let queue_info = vk::DeviceQueueCreateInfo::default()
+            .queue_family_index(queue_family_index)
+            .queue_priorities(&priorities);
+
+        let device_create_info = vk::DeviceCreateInfo::default()
+            .queue_create_infos(std::slice::from_ref(&queue_info))
+            .enabled_extension_names(&device_extension_names_raw)
+            .enabled_features(&features);
+
+        let device = instance
+            .create_device(physical_device, &device_create_info, None)?;
+
+        Ok(Self {
+            handle: device,
+            queue_family_index
+        })
+    }
+    
+    pub fn get_device_queue(&self, queue_index: u32) -> vk::Queue {
+        unsafe {
+            self.handle.get_device_queue(self.queue_family_index, queue_index)
+        }
+    }
+}
+
+impl Drop for VkDevice {
+    fn drop(&mut self) {
+        unsafe {
+            self.handle.destroy_device(None);
+        }
+    }
+}

src/vulkan/vk_instance.rs

@@ -1,7 +1,8 @@
-use std::ffi::{c_char, CString};
-use std::fmt::{Debug, Display, Formatter};
+use std::ffi::{c_char, CStr, CString};
+use std::fmt::{Display, Formatter};
 use ash::{Instance, vk, Entry};
 use ash::khr::surface;
+use ash::prelude::VkResult;
 use winit::raw_window_handle::{HasDisplayHandle, HasWindowHandle};
 use crate::vulkan::utils::formatter::format_instance_layer;
 use crate::vulkan::utils::layers::{use_layers, LayersSelector};
@@ -19,6 +20,17 @@ impl VkInstance {
     ) -> Self {
         let entry = Entry::linked();
 
+        log::debug!("Initializing Vulkan instance");
+
+        if log::log_enabled!(log::Level::Debug) {
+            let required_extensions = required_extensions
+                .iter()
+                .map(|str| unsafe { CStr::from_ptr(*str) })
+                .map(|cstr| cstr.to_string_lossy())
+                .collect::<Vec<_>>();
+            log::debug!("Required instance extensions: {}", required_extensions.join(", "));
+        }
+
         // Layers
         let layers = use_layers(
             &entry,
@@ -28,6 +40,12 @@ impl VkInstance {
                 "VK_LAYER_NV_optimus"
             ])
         );
+        if log::log_enabled!(log::Level::Info) {
+            let layers = layers.iter()
+                .map(|layer| layer.to_string_lossy())
+                .collect::<Vec<_>>();
+            log::debug!("Selected debug layers : {}", layers.join(", "))
+        }
         let layers_raw = layers.iter().map(|s| s.as_ptr()).collect::<Vec<_>>();
 
         // App Info
@@ -58,6 +76,8 @@ impl VkInstance {
                 .expect("Instance creation error")
         };
 
+        log::debug!("Vulkan instance created");
+
         Self {
             entry,
             handle: instance
@@ -91,11 +111,24 @@ impl VkInstance {
             )?
         };
 
+        log::debug!("Surface created");
+
         Ok(VkSurface::new(
             surface_loader,
             surface,
         ))
     }
+
+    pub fn create_device(
+        &self,
+        physical_device: &VkPhysicalDevice,
+        create_info: &vk::DeviceCreateInfo,
+        allocation_callbacks: Option<&vk::AllocationCallbacks>,
+    ) -> VkResult<ash::Device> {
+        unsafe {
+            self.handle.create_device(physical_device.handle, &create_info, allocation_callbacks)
+        }
+    }
 }
 
 impl Drop for VkInstance {
@@ -103,6 +136,7 @@ impl Drop for VkInstance {
         unsafe {
             self.handle.destroy_instance(None);
         }
+        log::debug!("Vulkan instance destroyed");
     }
 }
 

src/vulkan/vk_logical_device.rs

@@ -1,3 +0,0 @@
-pub struct VkLogicalDevice {
-    
-}

src/vulkan/vk_physical_device.rs

@@ -1,6 +1,7 @@
 use std::fmt::{Display, Formatter};
 use ash::vk;
 use crate::vulkan::utils::formatter::{format_driver_version, format_vulkan_version};
+use crate::vulkan::vk_surface::VkSurface;
 
 pub struct VkPhysicalDevice {
     // Vulkan properties
@@ -24,6 +25,39 @@ impl VkPhysicalDevice {
             queue_family_properties: device_queue_families
         }
     }
+    
+    pub fn find_queue_family_by(
+        &self,
+        queue_flags: Option<vk::QueueFlags>,
+        surface: Option<&VkSurface>
+    ) -> Option<(u32, &vk::QueueFamilyProperties)> {
+        self.queue_family_properties
+            .iter()
+            .enumerate()
+            .find_map(|(index, queue_family_property)| {
+                let surface_check_passed = match surface {
+                    Some(surface) => {
+                        surface.physical_device_queue_supported(self, index as u32)
+                            .unwrap_or(false)
+                    }
+                    None => true,
+                };
+
+                let queue_flags_check_passed = match queue_flags {
+                    Some(queue_flags) => {
+                        queue_family_property.queue_flags
+                            .contains(queue_flags)
+                    },
+                    None => true
+                };
+
+                if surface_check_passed && queue_flags_check_passed {
+                    Some((index as u32, queue_family_property))
+                } else {
+                    None
+                }
+            })
+    }
 
     pub fn priority(&self) -> usize {
         match self.properties.device_type {

src/vulkan/vk_render_context.rs

@@ -0,0 +1,46 @@
+use ash::vk::QueueFlags;
+use crate::vulkan::{VkDevice, VkInstance, VkSurface};
+
+pub struct VkRenderContext {
+    surface: VkSurface,
+    instance: VkInstance,
+}
+
+impl VkRenderContext {
+    pub fn init(window: &crate::display::Window) -> anyhow::Result<Self> {
+        let required_extensions = window
+            .required_extensions()?;
+
+        let instance = VkInstance::new(&required_extensions);
+        let surface = instance.create_surface(&window)?;
+
+        let mut physical_devices = instance.get_physical_devices();
+        physical_devices.sort_by(|a, b| b.priority().cmp(&a.priority()));
+
+        let (physical_device, (queue_family_index, _)) = physical_devices
+            .iter()
+            .find_map(|physical_device| {
+                physical_device.find_queue_family_by(Some(QueueFlags::GRAPHICS), Some(&surface))
+                    .and_then(|queue_index| Some((physical_device, queue_index)))
+            })
+            .expect("Unable to find suitable device");
+
+        let device = VkDevice::new_graphics_device(&instance, &physical_device, queue_family_index)
+            .expect("Unable to create device");
+
+        let present_queue = device.get_device_queue(0);
+
+        let surface_format = surface.get_physical_device_surface_formats(physical_device)
+            .unwrap_or_default()
+            .first()
+            .expect("Unable to get surface format");
+
+        let surface_capabilities = surface.get_physical_device_surface_capabilities(physical_device)
+            .expect("Unable to get surface capabilities");
+
+        Ok(Self{
+            instance,
+            surface
+        })
+    }
+}

src/vulkan/vk_surface.rs

@@ -1,22 +1,23 @@
 use ash::prelude::VkResult;
+use ash::vk;
 use crate::vulkan::VkPhysicalDevice;
 
 pub struct VkSurface {
     surface_loader: ash::khr::surface::Instance,
-    surface: ash::vk::SurfaceKHR,
+    surface: vk::SurfaceKHR,
 }
 
 impl VkSurface {
     pub fn new(
         surface_loader: ash::khr::surface::Instance,
-        surface: ash::vk::SurfaceKHR,
+        surface: vk::SurfaceKHR,
     ) -> Self {
         Self {
             surface_loader,
             surface
         }
     }
-    
+
     pub fn physical_device_queue_supported(&self, physical_device: &VkPhysicalDevice, queue_index: u32) -> VkResult<bool> {
         unsafe {
             self.surface_loader.get_physical_device_surface_support(
@@ -26,4 +27,40 @@ impl VkSurface {
             )
         }
     }
+
+    pub fn get_physical_device_surface_formats(&self, physical_device: &VkPhysicalDevice) -> VkResult<Vec<vk::SurfaceFormatKHR>> {
+        unsafe {
+            self.surface_loader.get_physical_device_surface_formats(
+                physical_device.handle,
+                self.surface
+            )
+        }
+    }
+
+    pub fn get_physical_device_surface_capabilities(&self, physical_device: &VkPhysicalDevice) -> VkResult<vk::SurfaceCapabilitiesKHR> {
+        unsafe {
+            self.surface_loader.get_physical_device_surface_capabilities(
+                physical_device.handle,
+                self.surface
+            )
+        }
+    }
+
+    pub fn get_physical_device_surface_present_modes(&self, physical_device: &VkPhysicalDevice) -> VkResult<Vec<vk::PresentModeKHR>> {
+        unsafe {
+            self.surface_loader.get_physical_device_surface_present_modes(
+                physical_device.handle,
+                self.surface
+            )
+        }
+    }
 }
+
+impl Drop for VkSurface {
+    fn drop(&mut self) {
+        unsafe {
+            self.surface_loader.destroy_surface(self.surface, None);
+        }
+        log::debug!("Surface destroyed");
+    }
+}