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/image.cpp | 122 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 122 insertions(+)
 create mode 100644 src/vk/image.cpp

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

diff --git a/src/vk/image.cpp b/src/vk/image.cpp
new file mode 100644
index 0000000..11dc9a5
--- /dev/null
+++ b/src/vk/image.cpp
@@ -0,0 +1,122 @@
+/*
+ * 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 "image.hpp"
+
+#include "../core.hpp"
+
+namespace VK::Image
+{
+
+Error::Error(const std::string &m):
+  error(m)
+{
+}
+
+Error::Error(const char &m):
+  Error{std::string{m}}
+{
+}
+
+const char*
+Error::what() const noexcept
+{
+  return this->error.c_str();
+}
+
+void
+create(
+  VK::Device *device,
+  VkImage *image,
+  VkDeviceMemory *image_memory,
+  VkFormat format,
+  const VkExtent3D &extent3d,
+  uint32_t mip_levels,
+  VkImageTiling image_tiling,
+  VkImageUsageFlags usage)
+{
+  VkImageCreateInfo image_info{};
+  image_info.sType = VK_STRUCTURE_TYPE_IMAGE_CREATE_INFO;
+  image_info.pNext = nullptr;
+  image_info.flags = 0;
+  image_info.imageType = VK_IMAGE_TYPE_2D;
+  image_info.format = format;
+  image_info.extent = extent3d;
+  image_info.mipLevels = mip_levels;
+  image_info.arrayLayers = 1;
+  image_info.samples = VK_SAMPLE_COUNT_1_BIT;
+  image_info.tiling = image_tiling;
+  image_info.usage = usage;
+  image_info.sharingMode = VK_SHARING_MODE_EXCLUSIVE;
+  image_info.queueFamilyIndexCount = 0;
+  image_info.pQueueFamilyIndices = nullptr;
+  image_info.initialLayout = VK_IMAGE_LAYOUT_UNDEFINED;
+
+  if(vkCreateImage(
+       device->device, &image_info, nullptr, image) != VK_SUCCESS)
+    throw Error{"Failed to create Vulkan image."};
+
+  VkMemoryRequirements memory_requirements;
+  vkGetImageMemoryRequirements(device->device, *image, &memory_requirements);
+
+  VkMemoryAllocateInfo memory_alloc_info{};
+  memory_alloc_info.sType = VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO;
+  memory_alloc_info.allocationSize = memory_requirements.size;
+  device->select_memory_type(&memory_alloc_info.memoryTypeIndex,
+      &memory_requirements, VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT);
+
+  if(vkAllocateMemory(
+       device->device, &memory_alloc_info, nullptr, image_memory)
+     != VK_SUCCESS)
+  {
+    vkDestroyImage(device->device, *image, nullptr);
+    throw Error{"Failed to allocate memory for Vulkan image."};
+  }
+
+  vkBindImageMemory(device->device, *image, *image_memory, 0);
+}
+
+void create_view(
+  VK::Device *device,
+  VkImageView *image_view,
+  const VkImage &image,
+  VkFormat format,
+  VkImageAspectFlags image_aspect_flags)
+{
+  VkImageViewCreateInfo image_view_info{};
+  image_view_info.sType = VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO;
+  image_view_info.pNext = nullptr;
+  image_view_info.flags = 0;
+  image_view_info.image = image;
+  image_view_info.viewType = VK_IMAGE_VIEW_TYPE_2D;
+  image_view_info.format = format;
+  image_view_info.components.r = VK_COMPONENT_SWIZZLE_IDENTITY;
+  image_view_info.components.g = VK_COMPONENT_SWIZZLE_IDENTITY;
+  image_view_info.components.b = VK_COMPONENT_SWIZZLE_IDENTITY;
+  image_view_info.components.a = VK_COMPONENT_SWIZZLE_IDENTITY;
+  image_view_info.subresourceRange.aspectMask = image_aspect_flags;
+  image_view_info.subresourceRange.baseMipLevel = 0;
+  image_view_info.subresourceRange.levelCount = 1;
+  image_view_info.subresourceRange.baseArrayLayer = 0;
+  image_view_info.subresourceRange.layerCount = 1;
+
+  if(vkCreateImageView(device->device, &image_view_info,
+                       nullptr, image_view) != VK_SUCCESS)
+    throw Error{"Failed to create texture view."};
+
+}
+
+}
-- 
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