Extended the swapchain creation process

src/engine/engine.h

@@ -3,7 +3,9 @@
 // Normal header
 
 #include "types.h"
+#include <cstddef>
 #include <fmt/base.h>
+#include <vulkan/vulkan_core.h>
 
 
 struct FrameData {
@@ -391,6 +393,71 @@ void Engine::initSwapchain() {
     1
   };
 
+  // Hardcoding draw format to a 32 bit float
+
+  _drawImage.imageFormat  = VK_FORMAT_R16G16B16A16_SFLOAT;
+  _drawImage.imageExtent  = drawImageExtent;
+
+  VkImageUsageFlags drawImageUsages {
+    VK_IMAGE_USAGE_TRANSFER_SRC_BIT     |
+    VK_IMAGE_USAGE_TRANSFER_DST_BIT     |
+    VK_IMAGE_USAGE_STORAGE_BIT          |
+    VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT
+  };
+
+  VkImageCreateInfo rImgInfo = {
+    vkinit::imageCreateInfo(
+      _drawImage.imageFormat,
+      drawImageUsages,
+      drawImageExtent
+    )
+  };
+
+  // Use the GPU local memory for the draw image
+  VmaAllocationCreateInfo rImgAllocInfo = {
+    .usage          = VMA_MEMORY_USAGE_GPU_ONLY,
+    .requiredFlags  = VkMemoryPropertyFlags(VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT)
+  };
+
+  vmaCreateImage(
+    _allocator,
+    &rImgInfo,
+    &_drawImage.image,
+    &_drawImage.allocation,
+    nullptr
+  );
+
+  VkImageViewCreateInfo rViewInfo = {
+    vkinit::imageViewCreateInfo(
+      _drawImage.imageFormat,
+      _drawImage.image,
+      VK_IMAGE_ASPECT_DEPTH_BIT
+    )
+  };
+
+  VK_CHECK(
+    vkCreateImageView(
+      _device,
+      &rViewInfo,
+      nullptr,
+      &_drawImage.imageView
+    )
+  );
+
+  // Add to deletion queues
+  _mainDeletionQueue.pushFunction([=]() {
+    vkDestroyImageView(
+      _device,
+      _drawImage.imageView,
+      nullptr
+    );
+    vmaDestroyImage(
+      _allocator,
+      _drawImage.image,
+      _drawImage.allocation
+    );
+  })
+
   #ifdef DEBUG
   fmt::println("Swapchain initialized !");
   #endif