vkCopyImageToMemoryEXT
To copy data from an image object to host memory, call:
VkResult vkCopyImageToMemoryEXT(
VkDevice device,
const VkCopyImageToMemoryInfoEXT* pCopyImageToMemoryInfo);
deviceis the device which ownspCopyImageToMemoryInfo→srcImage.pCopyImageToMemoryInfois a pointer to a VkCopyImageToMemoryInfoEXT structure describing the copy parameters.
This command is functionally similar to vkCmdCopyImageToBuffer2,
except it is executed on the host and writes to host memory instead of a
buffer.
The memory of pCopyImageToMemoryInfo→srcImage is accessed by the host
as if coherent.
If the device has written to the image memory, it is not automatically made
available to the host.
Before this copy command can be called, a memory barrier for this image
must have been issued on the device with the second
synchronization scope including
VK_PIPELINE_STAGE_HOST_BIT and VK_ACCESS_HOST_READ_BIT.
Valid Usage
VUID-vkCopyImageToMemoryEXT-hostImageCopy-09063
The hostImageCopy feature must be
enabled
Valid Usage (Implicit)
VUID-vkCopyImageToMemoryEXT-device-parameter
device must be a valid VkDevice handle
VUID-vkCopyImageToMemoryEXT-pCopyImageToMemoryInfo-parameter
pCopyImageToMemoryInfo must be a valid pointer to a valid VkCopyImageToMemoryInfoEXT structure