Begin add use_layers [not work]

src/vulkan/utils.rs

@@ -0,0 +1,51 @@
+use std::ffi::CStr;
+use ash::{vk, Entry};
+
+pub fn use_layers(
+    entry: &Entry,
+    layers_to_select: Vec<&str>
+) -> Vec<*const std::ffi::c_char> {
+    let layers_available = unsafe {
+        entry
+            .enumerate_instance_layer_properties()
+            .unwrap_or_default()
+    };
+
+    let mut selected_layers = Vec::<&CStr>::new();
+
+    log::info!("Available layers ({}):", layers_available.len());
+    for l in layers_available {
+        let layer_name = l.layer_name_as_c_str().unwrap_or_default();
+        if layers_to_select.iter().any(|ln| (*ln).eq(layer_name)) {
+            selected_layers.push(layer_name.clone());
+        }
+
+        log::info!(
+            "\t{:?}\tImplementation version: {}\tVulkan Version: {}\tDescription: {:?}",
+            l.layer_name_as_c_str().unwrap_or_default(),
+            l.implementation_version,
+            print_version(l.spec_version),
+            l.description_as_c_str().unwrap_or_default()
+        );
+    }
+    log::info!(""); // Add blank line
+
+    log::info!("Layers to select ({}):", layers_to_select.len());
+    for l in layers_to_select {
+        let selected = selected_layers.contains(&l);
+        log::info!("\t{:?}\tSelected: {}", l, selected);
+    }
+    log::info!(""); // Add blank line
+    
+    selected_layers.iter().map(|sl| sl.as_ptr()).collect()
+}
+
+pub fn print_version(version: u32) -> String {
+    format!(
+        "{}.{}.{}.{}",
+        vk::api_version_major(version),
+        vk::api_version_minor(version),
+        vk::api_version_patch(version),
+        vk::api_version_variant(version)
+    )
+}