vulkan: Move allocate to command pool

src/renderer/vulkan/vk_command_pool.rs

@@ -27,6 +27,21 @@ impl VkCommandPool {
             handle: command_pool,
         })
     }
+
+    pub fn allocate_command_buffers_for_framebuffers(&self, framebuffers_count: u32) -> VkResult<Vec<vk::CommandBuffer>> {
+        let command_buffer_info = vk::CommandBufferAllocateInfo::default()
+            .command_pool(self.handle)
+            .level(vk::CommandBufferLevel::PRIMARY)
+            .command_buffer_count(framebuffers_count);
+
+        let command_buffers = unsafe {
+            self.device
+                .handle
+                .allocate_command_buffers(&command_buffer_info)?
+        };
+
+        Ok(command_buffers)
+    }
 }
 
 impl Drop for VkCommandPool {