Fields
- flags: VkAttachmentDescriptionFlags
- format: VkFormat
- samples: VkSampleCountFlagBits
- loadOp: VkAttachmentLoadOp
- storeOp: VkAttachmentStoreOp
- stencilLoadOp: VkAttachmentLoadOp
- stencilStoreOp: VkAttachmentStoreOp
- initialLayout: VkImageLayout
- finalLayout: VkImageLayout