From f88712a929ee3543f8e1d45c6071f676df339cdb Mon Sep 17 00:00:00 2001
From: Frederico Linhares <fred@linhares.blue>
Date: Tue, 2 Aug 2022 16:52:33 -0300
Subject: refa Use Vulkan for graphics

This is a partial refactory. Some functionalities implemented in
SDL were removed and need reimplementation.
---
 src/vk/queue_family.cpp | 80 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 80 insertions(+)
 create mode 100644 src/vk/queue_family.cpp

(limited to 'src/vk/queue_family.cpp')

diff --git a/src/vk/queue_family.cpp b/src/vk/queue_family.cpp
new file mode 100644
index 0000000..7c91ba2
--- /dev/null
+++ b/src/vk/queue_family.cpp
@@ -0,0 +1,80 @@
+/*
+ * Copyright 2022 Frederico de Oliveira Linhares
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "queue_family.hpp"
+
+#include <iostream>
+
+#include "../core.hpp"
+
+namespace VK
+{
+
+QueueFamily::QueueFamily(
+  VK::Device *device, uint32_t family_index,
+  const VkQueueFamilyProperties &queue_family_properties):
+  queue_mutex{}
+{
+
+#ifdef DEBUG
+  std::cout << "Queue quantity: " << queue_family_properties.queueCount <<
+    std::endl;
+  std::cout << "Graphics: " <<
+    (queue_family_properties.queueFlags & VK_QUEUE_GRAPHICS_BIT ?
+     "true" : "false") << std::endl;
+  std::cout << "Compute: " <<
+    (queue_family_properties.queueFlags & VK_QUEUE_COMPUTE_BIT ?
+     "true" : "false") << std::endl;
+  std::cout << "Transfer: " <<
+    (queue_family_properties.queueFlags & VK_QUEUE_TRANSFER_BIT ?
+     "true" : "false") << std::endl;
+  std::cout << "Sparse Binding: " <<
+    (queue_family_properties.queueFlags & VK_QUEUE_SPARSE_BINDING_BIT ?
+     "true" : "false") << std::endl;
+#endif
+
+  this->device = device;
+  this->family_index = family_index;
+  this->family_properties = queue_family_properties;
+
+  // Create queues
+  {
+    auto queue_count = this->family_properties.queueCount;
+    this->queue_states.resize(queue_count);
+
+    for(auto i{0}; i < queue_count; i++)
+    {
+      vkGetDeviceQueue(device->device, this->family_index, i,
+		       &this->queue_states[i].queue);
+      if(this->queue_states[i].queue == VK_NULL_HANDLE)
+	throw std::runtime_error("Failed to get Vulkan queue.");
+    }
+  }
+}
+
+Queue
+QueueFamily::get_queue()
+{
+  std::unique_lock<std::mutex> lock{this->queue_mutex};
+
+  for(auto i{0}; i < this->queue_states.size(); i++)
+    if(!this->queue_states[i].busy)
+      return Queue(this, this->queue_states[i].queue, i);
+
+  throw std::length_error("No free queues found.");
+}
+
+}
-- 
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