VkImageCopy

VkImageCopy is a structure used in the Vulkan graphics API to define a region within an image for operations such as copying, blitting, or resolving. It is part of the command buffer recording process, specifically when issuing commands that transfer image data between different images or subresources.

The VkImageCopy structure contains two key members: srcSubresource and dstSubresource. These members specify the source and destination subresource respectively. A subresource can refer to a specific mipmap level, an array layer, or a combination of both. The structure also includes srcOffset and dstOffset, which define the starting coordinates (x, y, z) within the source and destination images, respectively. Finally, extent defines the dimensions (width, height, depth) of the region to be copied.

When using VkImageCopy, it's crucial to ensure that the source and destination images are compatible in terms of format, dimensions, and sample counts (if applicable). Mismatches can lead to undefined behavior or validation errors. The offsets and extent must also fall within the bounds of the respective subresources. Understanding VkImageCopy is essential for efficient and correct image manipulation in Vulkan applications.