C Specification

To copy data from an image object to a buffer object, call:

// Provided by VK_VERSION_1_0
void vkCmdCopyImageToBuffer(
    VkCommandBuffer                             commandBuffer,
    VkImage                                     srcImage,
    VkImageLayout                               srcImageLayout,
    VkBuffer                                    dstBuffer,
    uint32_t                                    regionCount,
    const VkBufferImageCopy*                    pRegions);

Parameters

  • commandBuffer is the command buffer into which the command will be recorded.

  • srcImage is the source image.

  • srcImageLayout is the layout of the source image subresources for the copy.

  • dstBuffer is the destination buffer.

  • regionCount is the number of regions to copy.

  • pRegions is a pointer to an array of VkBufferImageCopy structures specifying the regions to copy.

Description

Each source region specified by pRegions is copied from the source image to the destination region of the destination buffer according to the addressing calculations for each resource. If any of the specified regions in srcImage overlaps in memory with any of the specified regions in dstBuffer, values read from those overlapping regions are undefined.

Copy regions for the image must be aligned to a multiple of the texel block extent in each dimension, except at the edges of the image, where region extents must match the edge of the image.

Valid Usage

  • VUID-vkCmdCopyImageToBuffer-srcImage-07966
    If srcImage is non-sparse then the image or the specified disjoint plane must be bound completely and contiguously to a single VkDeviceMemory object

  • VUID-vkCmdCopyImageToBuffer-imageSubresource-07967
    The imageSubresource.mipLevel member of each element of pRegions must be less than the mipLevels specified in VkImageCreateInfo when srcImage was created

  • VUID-vkCmdCopyImageToBuffer-imageSubresource-07968
    If imageSubresource.layerCount is not VK_REMAINING_ARRAY_LAYERS, imageSubresource.baseArrayLayer + imageSubresource.layerCount of each element of pRegions must be less than or equal to the arrayLayers specified in VkImageCreateInfo when srcImage was created

  • VUID-vkCmdCopyImageToBuffer-srcImage-07969
    srcImage must not have been created with flags containing VK_IMAGE_CREATE_SUBSAMPLED_BIT_EXT

  • VUID-vkCmdCopyImageToBuffer-imageSubresource-07970
    The image region specified by each element of pRegions must be contained within the specified imageSubresource of srcImage

  • VUID-vkCmdCopyImageToBuffer-imageSubresource-07971
    For each element of pRegions, imageOffset.x and (imageExtent.width + imageOffset.x) must both be greater than or equal to 0 and less than or equal to the width of the specified imageSubresource of srcImage

  • VUID-vkCmdCopyImageToBuffer-imageSubresource-07972
    For each element of pRegions, imageOffset.y and (imageExtent.height + imageOffset.y) must both be greater than or equal to 0 and less than or equal to the height of the specified imageSubresource of srcImage

  • VUID-vkCmdCopyImageToBuffer-srcImage-07973
    srcImage must have a sample count equal to VK_SAMPLE_COUNT_1_BIT

  • VUID-vkCmdCopyImageToBuffer-commandBuffer-01831
    If commandBuffer is an unprotected command buffer and protectedNoFault is not supported, srcImage must not be a protected image

  • VUID-vkCmdCopyImageToBuffer-commandBuffer-01832
    If commandBuffer is an unprotected command buffer and protectedNoFault is not supported, dstBuffer must not be a protected buffer

  • VUID-vkCmdCopyImageToBuffer-commandBuffer-01833
    If commandBuffer is a protected command buffer and protectedNoFault is not supported, dstBuffer must not be an unprotected buffer

  • VUID-vkCmdCopyImageToBuffer-commandBuffer-07746
    If the queue family used to create the VkCommandPool which commandBuffer was allocated from does not support VK_QUEUE_GRAPHICS_BIT or VK_QUEUE_COMPUTE_BIT, the bufferOffset member of any element of pRegions must be a multiple of 4

  • VUID-vkCmdCopyImageToBuffer-imageOffset-07747
    The imageOffset and imageExtent members of each element of pRegions must respect the image transfer granularity requirements of commandBuffer’s command pool’s queue family, as described in VkQueueFamilyProperties

  • VUID-vkCmdCopyImageToBuffer-pRegions-00183
    dstBuffer must be large enough to contain all buffer locations that are accessed according to Buffer and Image Addressing, for each element of pRegions

  • VUID-vkCmdCopyImageToBuffer-pRegions-00184
    The union of all source regions, and the union of all destination regions, specified by the elements of pRegions, must not overlap in memory

  • VUID-vkCmdCopyImageToBuffer-srcImage-00186
    srcImage must have been created with VK_IMAGE_USAGE_TRANSFER_SRC_BIT usage flag

  • VUID-vkCmdCopyImageToBuffer-srcImage-01998
    The format features of srcImage must contain VK_FORMAT_FEATURE_TRANSFER_SRC_BIT

  • VUID-vkCmdCopyImageToBuffer-dstBuffer-00191
    dstBuffer must have been created with VK_BUFFER_USAGE_TRANSFER_DST_BIT usage flag

  • VUID-vkCmdCopyImageToBuffer-dstBuffer-00192
    If dstBuffer is non-sparse then it must be bound completely and contiguously to a single VkDeviceMemory object

  • VUID-vkCmdCopyImageToBuffer-srcImageLayout-00189
    srcImageLayout must specify the layout of the image subresources of srcImage specified in pRegions at the time this command is executed on a VkDevice

  • VUID-vkCmdCopyImageToBuffer-srcImageLayout-01397
    srcImageLayout must be VK_IMAGE_LAYOUT_SHARED_PRESENT_KHR, VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL, or VK_IMAGE_LAYOUT_GENERAL

  • VUID-vkCmdCopyImageToBuffer-srcImage-07979
    If srcImage is of type VK_IMAGE_TYPE_1D, then for each element of pRegions, imageOffset.y must be 0 and imageExtent.height must be 1

  • VUID-vkCmdCopyImageToBuffer-imageOffset-09104
    For each element of pRegions, imageOffset.z and (imageExtent.depth + imageOffset.z) must both be greater than or equal to 0 and less than or equal to the depth of the specified imageSubresource of srcImage

  • VUID-vkCmdCopyImageToBuffer-srcImage-07980
    If srcImage is of type VK_IMAGE_TYPE_1D or VK_IMAGE_TYPE_2D, then for each element of pRegions, imageOffset.z must be 0 and imageExtent.depth must be 1

  • VUID-vkCmdCopyImageToBuffer-srcImage-07274
    For each element of pRegions, imageOffset.x must be a multiple of the texel block extent width of the VkFormat of srcImage

  • VUID-vkCmdCopyImageToBuffer-srcImage-07275
    For each element of pRegions, imageOffset.y must be a multiple of the texel block extent height of the VkFormat of srcImage

  • VUID-vkCmdCopyImageToBuffer-srcImage-07276
    For each element of pRegions, imageOffset.z must be a multiple of the texel block extent depth of the VkFormat of srcImage

  • VUID-vkCmdCopyImageToBuffer-srcImage-00207
    For each element of pRegions, if the sum of imageOffset.x and extent.width does not equal the width of the subresource specified by srcSubresource, extent.width must be a multiple of the texel block extent width of the VkFormat of srcImage

  • VUID-vkCmdCopyImageToBuffer-srcImage-00208
    For each element of pRegions, if the sum of imageOffset.y and extent.height does not equal the height of the subresource specified by srcSubresource, extent.height must be a multiple of the texel block extent height of the VkFormat of srcImage

  • VUID-vkCmdCopyImageToBuffer-srcImage-00209
    For each element of pRegions, if the sum of imageOffset.z and extent.depth does not equal the depth of the subresource specified by srcSubresource, extent.depth must be a multiple of the texel block extent depth of the VkFormat of srcImage

  • VUID-vkCmdCopyImageToBuffer-imageSubresource-09105
    For each element of pRegions, imageSubresource.aspectMask must specify aspects present in srcImage

  • VUID-vkCmdCopyImageToBuffer-srcImage-07981
    If srcImage has a multi-planar image format, then for each element of pRegions, imageSubresource.aspectMask must be a single valid multi-planar aspect mask bit

  • VUID-vkCmdCopyImageToBuffer-srcImage-07983
    If srcImage is of type VK_IMAGE_TYPE_3D, for each element of pRegions, imageSubresource.baseArrayLayer must be 0 and imageSubresource.layerCount must be 1

  • VUID-vkCmdCopyImageToBuffer-bufferRowLength-09106
    For each element of pRegions, bufferRowLength must be a multiple of the texel block extent width of the VkFormat of srcImage

  • VUID-vkCmdCopyImageToBuffer-bufferImageHeight-09107
    For each element of pRegions, bufferImageHeight must be a multiple of the texel block extent height of the VkFormat of srcImage

  • VUID-vkCmdCopyImageToBuffer-bufferRowLength-09108
    For each element of pRegions, bufferRowLength divided by the texel block extent width and then multiplied by the texel block size of srcImage must be less than or equal to 231-1

  • VUID-vkCmdCopyImageToBuffer-srcImage-07975
    If srcImage does not have either a depth/stencil format or a multi-planar format, then for each element of pRegions, bufferOffset must be a multiple of the texel block size

  • VUID-vkCmdCopyImageToBuffer-srcImage-07976
    If srcImage has a multi-planar format, then for each element of pRegions, bufferOffset must be a multiple of the element size of the compatible format for the format and the aspectMask of the imageSubresource as defined in [formats-compatible-planes]

  • VUID-vkCmdCopyImageToBuffer-srcImage-07978
    If srcImage has a depth/stencil format, the bufferOffset member of any element of pRegions must be a multiple of 4

Valid Usage (Implicit)

  • VUID-vkCmdCopyImageToBuffer-commandBuffer-parameter
    commandBuffer must be a valid VkCommandBuffer handle

  • VUID-vkCmdCopyImageToBuffer-srcImage-parameter
    srcImage must be a valid VkImage handle

  • VUID-vkCmdCopyImageToBuffer-srcImageLayout-parameter
    srcImageLayout must be a valid VkImageLayout value

  • VUID-vkCmdCopyImageToBuffer-dstBuffer-parameter
    dstBuffer must be a valid VkBuffer handle

  • VUID-vkCmdCopyImageToBuffer-pRegions-parameter
    pRegions must be a valid pointer to an array of regionCount valid VkBufferImageCopy structures

  • VUID-vkCmdCopyImageToBuffer-commandBuffer-recording
    commandBuffer must be in the recording state

  • VUID-vkCmdCopyImageToBuffer-commandBuffer-cmdpool
    The VkCommandPool that commandBuffer was allocated from must support transfer, graphics, or compute operations

  • VUID-vkCmdCopyImageToBuffer-renderpass
    This command must only be called outside of a render pass instance

  • VUID-vkCmdCopyImageToBuffer-videocoding
    This command must only be called outside of a video coding scope

  • VUID-vkCmdCopyImageToBuffer-regionCount-arraylength
    regionCount must be greater than 0

  • VUID-vkCmdCopyImageToBuffer-commonparent
    Each of commandBuffer, dstBuffer, and srcImage must have been created, allocated, or retrieved from the same VkDevice

Host Synchronization

  • Host access to commandBuffer must be externally synchronized

  • Host access to the VkCommandPool that commandBuffer was allocated from must be externally synchronized

Command Properties
Command Buffer Levels Render Pass Scope Video Coding Scope Supported Queue Types Command Type

Primary
Secondary

Outside

Outside

Transfer
Graphics
Compute

Action

See Also

VK_VERSION_1_0, VkBuffer, VkBufferImageCopy, VkCommandBuffer, VkImage, VkImageLayout

Document Notes

For more information, see the Vulkan Specification

This page is extracted from the Vulkan Specification. Fixes and changes should be made to the Specification, not directly.

Copyright

Copyright 2014-2024 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0