pub type PFN_vkCmdCopyImageToBuffer = unsafe extern "system" fn(command_buffer: CommandBuffer, src_image: Image, src_image_layout: ImageLayout, dst_buffer: Buffer, region_count: u32, p_regions: *const BufferImageCopy);
pub type PFN_vkCmdCopyImageToBuffer = unsafe extern "system" fn(command_buffer: CommandBuffer, src_image: Image, src_image_layout: ImageLayout, dst_buffer: Buffer, region_count: u32, p_regions: *const BufferImageCopy);