603 lines
25 KiB
Plaintext
603 lines
25 KiB
Plaintext
// Copyright (c) 2015-2018 Khronos Group. This work is licensed under a
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// Creative Commons Attribution 4.0 International License; see
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// http://creativecommons.org/licenses/by/4.0/
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[[clears]]
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= Clear Commands
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[[clears-outside]]
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== Clearing Images Outside A Render Pass Instance
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Color and depth/stencil images can: be cleared outside a render pass
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instance using flink:vkCmdClearColorImage or
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flink:vkCmdClearDepthStencilImage, respectively.
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These commands are only allowed outside of a render pass instance.
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[open,refpage='vkCmdClearColorImage',desc='Clear regions of a color image',type='protos']
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--
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To clear one or more subranges of a color image, call:
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include::../api/protos/vkCmdClearColorImage.txt[]
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* pname:commandBuffer is the command buffer into which the command will be
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recorded.
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* pname:image is the image to be cleared.
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* pname:imageLayout specifies the current layout of the image subresource
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ranges to be cleared, and must: be
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ifdef::VK_KHR_shared_presentable_image[]
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ename:VK_IMAGE_LAYOUT_SHARED_PRESENT_KHR,
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endif::VK_KHR_shared_presentable_image[]
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ename:VK_IMAGE_LAYOUT_GENERAL or
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ename:VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL.
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* pname:pColor is a pointer to a slink:VkClearColorValue structure that
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contains the values the image subresource ranges will be cleared to (see
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<<clears-values>> below).
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* pname:rangeCount is the number of image subresource range structures in
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pname:pRanges.
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* pname:pRanges points to an array of slink:VkImageSubresourceRange
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structures that describe a range of mipmap levels, array layers, and
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aspects to be cleared, as described in <<resources-image-views,Image
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Views>>.
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The pname:aspectMask of all image subresource ranges must: only include
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ename:VK_IMAGE_ASPECT_COLOR_BIT.
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Each specified range in pname:pRanges is cleared to the value specified by
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pname:pColor.
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.Valid Usage
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****
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ifdef::VK_VERSION_1_1,VK_KHR_maintenance1[]
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* [[VUID-vkCmdClearColorImage-image-01993]]
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The <<resources-image-format-features,format features>> of pname:image
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must: contain ename:VK_FORMAT_FEATURE_TRANSFER_DST_BIT.
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endif::VK_VERSION_1_1,VK_KHR_maintenance1[]
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* [[VUID-vkCmdClearColorImage-image-00002]]
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pname:image must: have been created with
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ename:VK_IMAGE_USAGE_TRANSFER_DST_BIT usage flag
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ifdef::VK_VERSION_1_1,VK_KHR_sampler_ycbcr_conversion[]
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* [[VUID-vkCmdClearColorImage-image-01545]]
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pname:image must: not use a format listed in
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<<features-formats-requiring-sampler-ycbcr-conversion>>
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endif::VK_VERSION_1_1,VK_KHR_sampler_ycbcr_conversion[]
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* [[VUID-vkCmdClearColorImage-image-00003]]
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If pname:image is non-sparse then it must: be bound completely and
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contiguously to a single sname:VkDeviceMemory object
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* [[VUID-vkCmdClearColorImage-imageLayout-00004]]
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pname:imageLayout must: specify the layout of the image subresource
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ranges of pname:image specified in pname:pRanges at the time this
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command is executed on a sname:VkDevice
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ifndef::VK_KHR_shared_presentable_image[]
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* [[VUID-vkCmdClearColorImage-imageLayout-00005]]
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pname:imageLayout must: be ename:VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL or
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ename:VK_IMAGE_LAYOUT_GENERAL
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endif::VK_KHR_shared_presentable_image[]
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ifdef::VK_KHR_shared_presentable_image[]
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* [[VUID-vkCmdClearColorImage-imageLayout-01394]]
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pname:imageLayout must: be ename:VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL,
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ename:VK_IMAGE_LAYOUT_GENERAL, or
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ename:VK_IMAGE_LAYOUT_SHARED_PRESENT_KHR
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endif::VK_KHR_shared_presentable_image[]
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* [[VUID-vkCmdClearColorImage-baseMipLevel-01470]]
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The slink:VkImageSubresourceRange::pname:baseMipLevel members of the
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elements of the pname:pRanges array must: each be less than the
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pname:mipLevels specified in slink:VkImageCreateInfo when pname:image
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was created
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* [[VUID-vkCmdClearColorImage-pRanges-01692]]
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For each slink:VkImageSubresourceRange element of pname:pRanges, if the
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pname:levelCount member is not ename:VK_REMAINING_MIP_LEVELS, then
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[eq]#pname:baseMipLevel {plus} pname:levelCount# must: be less than the
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pname:mipLevels specified in slink:VkImageCreateInfo when pname:image
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was created
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* [[VUID-vkCmdClearColorImage-baseArrayLayer-01472]]
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The slink:VkImageSubresourceRange::pname:baseArrayLayer members of the
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elements of the pname:pRanges array must: each be less than the
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pname:arrayLayers specified in slink:VkImageCreateInfo when pname:image
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was created
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* [[VUID-vkCmdClearColorImage-pRanges-01693]]
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For each slink:VkImageSubresourceRange element of pname:pRanges, if the
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pname:layerCount member is not ename:VK_REMAINING_ARRAY_LAYERS, then
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[eq]#pname:baseArrayLayer {plus} pname:layerCount# must: be less than
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the pname:arrayLayers specified in slink:VkImageCreateInfo when
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pname:image was created
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* [[VUID-vkCmdClearColorImage-image-00007]]
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pname:image must: not have a compressed or depth/stencil format
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ifdef::VK_VERSION_1_1[]
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* [[VUID-vkCmdClearColorImage-commandBuffer-01805]]
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If pname:commandBuffer is an unprotected command buffer, then
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pname:image must: not be a protected image
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* [[VUID-vkCmdClearColorImage-commandBuffer-01806]]
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If pname:commandBuffer is a protected command buffer, then pname:image
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must: not be an unprotected image
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endif::VK_VERSION_1_1[]
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****
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include::../validity/protos/vkCmdClearColorImage.txt[]
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--
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[open,refpage='vkCmdClearDepthStencilImage',desc='Fill regions of a combined depth/stencil image',type='protos']
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--
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To clear one or more subranges of a depth/stencil image, call:
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include::../api/protos/vkCmdClearDepthStencilImage.txt[]
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* pname:commandBuffer is the command buffer into which the command will be
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recorded.
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* pname:image is the image to be cleared.
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* pname:imageLayout specifies the current layout of the image subresource
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ranges to be cleared, and must: be ename:VK_IMAGE_LAYOUT_GENERAL or
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ename:VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL.
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* pname:pDepthStencil is a pointer to a slink:VkClearDepthStencilValue
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structure that contains the values the depth and stencil image
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subresource ranges will be cleared to (see <<clears-values>> below).
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* pname:rangeCount is the number of image subresource range structures in
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pname:pRanges.
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* pname:pRanges points to an array of slink:VkImageSubresourceRange
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structures that describe a range of mipmap levels, array layers, and
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aspects to be cleared, as described in <<resources-image-views,Image
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Views>>.
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The pname:aspectMask of each image subresource range in pname:pRanges
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can: include ename:VK_IMAGE_ASPECT_DEPTH_BIT if the image format has a
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depth component, and ename:VK_IMAGE_ASPECT_STENCIL_BIT if the image
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format has a stencil component.
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.Valid Usage
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****
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ifdef::VK_VERSION_1_1,VK_KHR_maintenance1[]
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* [[VUID-vkCmdClearDepthStencilImage-image-01994]]
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The <<resources-image-format-features,format features>> of pname:image
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must: contain ename:VK_FORMAT_FEATURE_TRANSFER_DST_BIT.
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endif::VK_VERSION_1_1,VK_KHR_maintenance1[]
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* [[VUID-vkCmdClearDepthStencilImage-image-00009]]
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pname:image must: have been created with
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ename:VK_IMAGE_USAGE_TRANSFER_DST_BIT usage flag
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* [[VUID-vkCmdClearDepthStencilImage-image-00010]]
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If pname:image is non-sparse then it must: be bound completely and
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contiguously to a single sname:VkDeviceMemory object
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* [[VUID-vkCmdClearDepthStencilImage-imageLayout-00011]]
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pname:imageLayout must: specify the layout of the image subresource
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ranges of pname:image specified in pname:pRanges at the time this
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command is executed on a sname:VkDevice
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* [[VUID-vkCmdClearDepthStencilImage-imageLayout-00012]]
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pname:imageLayout must: be either of
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ename:VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL or
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ename:VK_IMAGE_LAYOUT_GENERAL
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* [[VUID-vkCmdClearDepthStencilImage-baseMipLevel-01474]]
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The slink:VkImageSubresourceRange::pname:baseMipLevel members of the
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elements of the pname:pRanges array must: each be less than the
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pname:mipLevels specified in slink:VkImageCreateInfo when pname:image
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was created
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* [[VUID-vkCmdClearDepthStencilImage-pRanges-01694]]
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For each slink:VkImageSubresourceRange element of pname:pRanges, if the
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pname:levelCount member is not ename:VK_REMAINING_MIP_LEVELS, then
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[eq]#pname:baseMipLevel {plus} pname:levelCount# must: be less than the
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pname:mipLevels specified in slink:VkImageCreateInfo when pname:image
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was created
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* [[VUID-vkCmdClearDepthStencilImage-baseArrayLayer-01476]]
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The slink:VkImageSubresourceRange::pname:baseArrayLayer members of the
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elements of the pname:pRanges array must: each be less than the
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pname:arrayLayers specified in slink:VkImageCreateInfo when pname:image
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was created
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* [[VUID-vkCmdClearDepthStencilImage-pRanges-01695]]
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For each slink:VkImageSubresourceRange element of pname:pRanges, if the
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pname:layerCount member is not ename:VK_REMAINING_ARRAY_LAYERS, then
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[eq]#pname:baseArrayLayer {plus} pname:layerCount# must: be less than
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the pname:arrayLayers specified in slink:VkImageCreateInfo when
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pname:image was created
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* [[VUID-vkCmdClearDepthStencilImage-image-00014]]
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pname:image must: have a depth/stencil format
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ifdef::VK_VERSION_1_1[]
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* [[VUID-vkCmdClearDepthStencilImage-commandBuffer-01807]]
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If pname:commandBuffer is an unprotected command buffer, then
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pname:image must: not be a protected image
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* [[VUID-vkCmdClearDepthStencilImage-commandBuffer-01808]]
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If pname:commandBuffer is a protected command buffer, then pname:image
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must: not be an unprotected image
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endif::VK_VERSION_1_1[]
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****
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include::../validity/protos/vkCmdClearDepthStencilImage.txt[]
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--
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Clears outside render pass instances are treated as transfer operations for
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the purposes of memory barriers.
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[[clears-inside]]
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== Clearing Images Inside A Render Pass Instance
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[open,refpage='vkCmdClearAttachments',desc='Clear regions within bound framebuffer attachments',type='protos']
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--
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To clear one or more regions of color and depth/stencil attachments inside a
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render pass instance, call:
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include::../api/protos/vkCmdClearAttachments.txt[]
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* pname:commandBuffer is the command buffer into which the command will be
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recorded.
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* pname:attachmentCount is the number of entries in the pname:pAttachments
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array.
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* pname:pAttachments is a pointer to an array of slink:VkClearAttachment
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structures defining the attachments to clear and the clear values to
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use.
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* pname:rectCount is the number of entries in the pname:pRects array.
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* pname:pRects points to an array of slink:VkClearRect structures defining
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regions within each selected attachment to clear.
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fname:vkCmdClearAttachments can: clear multiple regions of each attachment
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used in the current subpass of a render pass instance.
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This command must: be called only inside a render pass instance, and
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implicitly selects the images to clear based on the current framebuffer
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attachments and the command parameters.
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.Valid Usage
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****
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* [[VUID-vkCmdClearAttachments-aspectMask-00015]]
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If the pname:aspectMask member of any element of pname:pAttachments
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contains ename:VK_IMAGE_ASPECT_COLOR_BIT, the pname:colorAttachment
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member of that element must: refer to a valid color attachment in the
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current subpass
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* [[VUID-vkCmdClearAttachments-pRects-00016]]
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The rectangular region specified by each element of pname:pRects must:
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be contained within the render area of the current render pass instance
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* [[VUID-vkCmdClearAttachments-pRects-00017]]
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The layers specified by each element of pname:pRects must: be contained
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within every attachment that pname:pAttachments refers to
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* [[VUID-vkCmdClearAttachments-layerCount-01934]]
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The pname:layerCount member of each element of pname:pRects must: not be
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`0`
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ifdef::VK_VERSION_1_1,VK_KHR_multiview[]
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* [[VUID-vkCmdClearAttachments-baseArrayLayer-00018]]
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If the render pass instance this is recorded in uses multiview, then
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pname:baseArrayLayer must: be zero and pname:layerCount must: be one.
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endif::VK_VERSION_1_1,VK_KHR_multiview[]
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****
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include::../validity/protos/vkCmdClearAttachments.txt[]
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--
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[open,refpage='VkClearRect',desc='Structure specifying a clear rectangle',type='structs']
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--
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The sname:VkClearRect structure is defined as:
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include::../api/structs/VkClearRect.txt[]
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* pname:rect is the two-dimensional region to be cleared.
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* pname:baseArrayLayer is the first layer to be cleared.
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* pname:layerCount is the number of layers to clear.
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The layers [eq]#[pname:baseArrayLayer, pname:baseArrayLayer {plus}
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pname:layerCount)# counting from the base layer of the attachment image view
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are cleared.
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include::../validity/structs/VkClearRect.txt[]
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--
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[open,refpage='VkClearAttachment',desc='Structure specifying a clear attachment',type='structs']
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--
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The sname:VkClearAttachment structure is defined as:
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include::../api/structs/VkClearAttachment.txt[]
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* pname:aspectMask is a mask selecting the color, depth and/or stencil
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aspects of the attachment to be cleared.
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pname:aspectMask can: include ename:VK_IMAGE_ASPECT_COLOR_BIT for color
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attachments, ename:VK_IMAGE_ASPECT_DEPTH_BIT for depth/stencil
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attachments with a depth component, and
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ename:VK_IMAGE_ASPECT_STENCIL_BIT for depth/stencil attachments with a
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stencil component.
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If the subpass's depth/stencil attachment is ename:VK_ATTACHMENT_UNUSED,
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then the clear has no effect.
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* pname:colorAttachment is only meaningful if
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ename:VK_IMAGE_ASPECT_COLOR_BIT is set in pname:aspectMask, in which
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case it is an index to the pname:pColorAttachments array in the
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slink:VkSubpassDescription structure of the current subpass which
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selects the color attachment to clear.
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If pname:colorAttachment is ename:VK_ATTACHMENT_UNUSED then the clear
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has no effect.
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* pname:clearValue is the color or depth/stencil value to clear the
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attachment to, as described in <<clears-values,Clear Values>> below.
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No memory barriers are needed between fname:vkCmdClearAttachments and
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preceding or subsequent draw or attachment clear commands in the same
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subpass.
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The fname:vkCmdClearAttachments command is not affected by the bound
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pipeline state.
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Attachments can: also be cleared at the beginning of a render pass instance
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by setting pname:loadOp (or pname:stencilLoadOp) of
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slink:VkAttachmentDescription to ename:VK_ATTACHMENT_LOAD_OP_CLEAR, as
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described for flink:vkCreateRenderPass.
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.Valid Usage
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****
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* [[VUID-VkClearAttachment-aspectMask-00019]]
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If pname:aspectMask includes ename:VK_IMAGE_ASPECT_COLOR_BIT, it must:
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not include ename:VK_IMAGE_ASPECT_DEPTH_BIT or
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ename:VK_IMAGE_ASPECT_STENCIL_BIT
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* [[VUID-VkClearAttachment-aspectMask-00020]]
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pname:aspectMask must: not include ename:VK_IMAGE_ASPECT_METADATA_BIT
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ifdef::VK_EXT_image_drm_format_modifier[]
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* [[VUID-VkClearAttachment-aspectMask-02246]]
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pname:aspectMask must: not include
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etext:VK_IMAGE_ASPECT_MEMORY_PLANE___i___BIT_EXT for any index __i__.
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endif::VK_EXT_image_drm_format_modifier[]
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* [[VUID-VkClearAttachment-clearValue-00021]]
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pname:clearValue must: be a valid sname:VkClearValue union
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ifdef::VK_VERSION_1_1[]
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* [[VUID-VkClearAttachment-commandBuffer-01809]]
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If pname:commandBuffer is an unprotected command buffer, then the
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attachment to be cleared must: not be a protected image.
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* [[VUID-VkClearAttachment-commandBuffer-01810]]
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If pname:commandBuffer is a protected command buffer, then the
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attachment to be cleared must: not be an unprotected image.
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endif::VK_VERSION_1_1[]
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****
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include::../validity/structs/VkClearAttachment.txt[]
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--
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[[clears-values]]
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== Clear Values
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[open,refpage='VkClearColorValue',desc='Structure specifying a clear color value',type='structs']
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--
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The sname:VkClearColorValue structure is defined as:
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include::../api/structs/VkClearColorValue.txt[]
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* pname:float32 are the color clear values when the format of the image or
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attachment is one of the formats in the
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<<features-formats-numericformat, Interpretation of Numeric Format>>
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table other than signed integer (etext:SINT) or unsigned integer
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(etext:UINT).
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Floating point values are automatically converted to the format of the
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image, with the clear value being treated as linear if the image is
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sRGB.
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* pname:int32 are the color clear values when the format of the image or
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attachment is signed integer (etext:SINT).
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Signed integer values are converted to the format of the image by
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casting to the smaller type (with negative 32-bit values mapping to
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negative values in the smaller type).
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If the integer clear value is not representable in the target type (e.g.
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would overflow in conversion to that type), the clear value is
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undefined.
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* pname:uint32 are the color clear values when the format of the image or
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attachment is unsigned integer (etext:UINT).
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Unsigned integer values are converted to the format of the image by
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casting to the integer type with fewer bits.
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The four array elements of the clear color map to R, G, B, and A components
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of image formats, in order.
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If the image has more than one sample, the same value is written to all
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samples for any pixels being cleared.
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include::../validity/structs/VkClearColorValue.txt[]
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--
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[open,refpage='VkClearDepthStencilValue',desc='Structure specifying a clear depth stencil value',type='structs']
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--
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The sname:VkClearDepthStencilValue structure is defined as:
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include::../api/structs/VkClearDepthStencilValue.txt[]
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* pname:depth is the clear value for the depth aspect of the depth/stencil
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attachment.
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It is a floating-point value which is automatically converted to the
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attachment's format.
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* pname:stencil is the clear value for the stencil aspect of the
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depth/stencil attachment.
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It is a 32-bit integer value which is converted to the attachment's
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format by taking the appropriate number of LSBs.
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.Valid Usage
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****
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ifdef::VK_EXT_depth_range_unrestricted[]
|
|
* [[VUID-VkClearDepthStencilValue-depth-00022]]
|
|
Unless the `<<VK_EXT_depth_range_unrestricted>>` extension is enabled
|
|
pname:depth must: be between `0.0` and `1.0`, inclusive
|
|
endif::VK_EXT_depth_range_unrestricted[]
|
|
ifndef::VK_EXT_depth_range_unrestricted[]
|
|
* [[VUID-VkClearDepthStencilValue-depth-00022]]
|
|
pname:depth must: be between `0.0` and `1.0`, inclusive
|
|
endif::VK_EXT_depth_range_unrestricted[]
|
|
****
|
|
|
|
|
|
include::../validity/structs/VkClearDepthStencilValue.txt[]
|
|
--
|
|
|
|
[open,refpage='VkClearValue',desc='Structure specifying a clear value',type='structs']
|
|
--
|
|
|
|
The sname:VkClearValue union is defined as:
|
|
|
|
include::../api/structs/VkClearValue.txt[]
|
|
|
|
* pname:color specifies the color image clear values to use when clearing
|
|
a color image or attachment.
|
|
* pname:depthStencil specifies the depth and stencil clear values to use
|
|
when clearing a depth/stencil image or attachment.
|
|
|
|
This union is used where part of the API requires either color or
|
|
depth/stencil clear values, depending on the attachment, and defines the
|
|
initial clear values in the slink:VkRenderPassBeginInfo structure.
|
|
|
|
include::../validity/structs/VkClearValue.txt[]
|
|
--
|
|
|
|
|
|
[[clears-filling-buffers]]
|
|
== Filling Buffers
|
|
|
|
[open,refpage='vkCmdFillBuffer',desc='Fill a region of a buffer with a fixed value',type='protos']
|
|
--
|
|
|
|
To clear buffer data, call:
|
|
|
|
include::../api/protos/vkCmdFillBuffer.txt[]
|
|
|
|
* pname:commandBuffer is the command buffer into which the command will be
|
|
recorded.
|
|
* pname:dstBuffer is the buffer to be filled.
|
|
* pname:dstOffset is the byte offset into the buffer at which to start
|
|
filling, and must: be a multiple of 4.
|
|
* pname:size is the number of bytes to fill, and must: be either a
|
|
multiple of 4, or ename:VK_WHOLE_SIZE to fill the range from
|
|
pname:offset to the end of the buffer.
|
|
If ename:VK_WHOLE_SIZE is used and the remaining size of the buffer is
|
|
not a multiple of 4, then the nearest smaller multiple is used.
|
|
* pname:data is the 4-byte word written repeatedly to the buffer to fill
|
|
pname:size bytes of data.
|
|
The data word is written to memory according to the host endianness.
|
|
|
|
fname:vkCmdFillBuffer is treated as "`transfer`" operation for the purposes
|
|
of synchronization barriers.
|
|
The ename:VK_BUFFER_USAGE_TRANSFER_DST_BIT must: be specified in pname:usage
|
|
of sname:VkBufferCreateInfo in order for the buffer to be compatible with
|
|
fname:vkCmdFillBuffer.
|
|
|
|
.Valid Usage
|
|
****
|
|
* [[VUID-vkCmdFillBuffer-dstOffset-00024]]
|
|
pname:dstOffset must: be less than the size of pname:dstBuffer
|
|
* [[VUID-vkCmdFillBuffer-dstOffset-00025]]
|
|
pname:dstOffset must: be a multiple of `4`
|
|
* [[VUID-vkCmdFillBuffer-size-00026]]
|
|
If pname:size is not equal to ename:VK_WHOLE_SIZE, pname:size must: be
|
|
greater than `0`
|
|
* [[VUID-vkCmdFillBuffer-size-00027]]
|
|
If pname:size is not equal to ename:VK_WHOLE_SIZE, pname:size must: be
|
|
less than or equal to the size of pname:dstBuffer minus pname:dstOffset
|
|
* [[VUID-vkCmdFillBuffer-size-00028]]
|
|
If pname:size is not equal to ename:VK_WHOLE_SIZE, pname:size must: be a
|
|
multiple of `4`
|
|
* [[VUID-vkCmdFillBuffer-dstBuffer-00029]]
|
|
pname:dstBuffer must: have been created with
|
|
ename:VK_BUFFER_USAGE_TRANSFER_DST_BIT usage flag
|
|
ifndef::VK_VERSION_1_1,VK_KHR_maintenance1[]
|
|
* [[VUID-vkCmdFillBuffer-commandBuffer-00030]]
|
|
The sname:VkCommandPool that pname:commandBuffer was allocated from
|
|
must: support graphics or compute operations
|
|
endif::VK_VERSION_1_1,VK_KHR_maintenance1[]
|
|
* [[VUID-vkCmdFillBuffer-dstBuffer-00031]]
|
|
If pname:dstBuffer is non-sparse then it must: be bound completely and
|
|
contiguously to a single sname:VkDeviceMemory object
|
|
ifdef::VK_VERSION_1_1[]
|
|
* [[VUID-vkCmdFillBuffer-commandBuffer-01811]]
|
|
If pname:commandBuffer is an unprotected command buffer, then
|
|
pname:dstBuffer must: not be a protected buffer
|
|
* [[VUID-vkCmdFillBuffer-commandBuffer-01812]]
|
|
If pname:commandBuffer is a protected command buffer, then
|
|
pname:dstBuffer must: not be an unprotected buffer
|
|
endif::VK_VERSION_1_1[]
|
|
****
|
|
|
|
include::../validity/protos/vkCmdFillBuffer.txt[]
|
|
--
|
|
|
|
|
|
[[clears-updating-buffers]]
|
|
== Updating Buffers
|
|
|
|
[open,refpage='vkCmdUpdateBuffer',desc='Update a buffer\'s contents from host memory',type='protos']
|
|
--
|
|
|
|
To update buffer data inline in a command buffer, call:
|
|
|
|
include::../api/protos/vkCmdUpdateBuffer.txt[]
|
|
|
|
* pname:commandBuffer is the command buffer into which the command will be
|
|
recorded.
|
|
* pname:dstBuffer is a handle to the buffer to be updated.
|
|
* pname:dstOffset is the byte offset into the buffer to start updating,
|
|
and must: be a multiple of 4.
|
|
* pname:dataSize is the number of bytes to update, and must: be a multiple
|
|
of 4.
|
|
* pname:pData is a pointer to the source data for the buffer update, and
|
|
must: be at least pname:dataSize bytes in size.
|
|
|
|
pname:dataSize must: be less than or equal to 65536 bytes.
|
|
For larger updates, applications can: use buffer to buffer
|
|
<<copies-buffers,copies>>.
|
|
|
|
[NOTE]
|
|
.Note
|
|
====
|
|
Buffer updates performed with fname:vkCmdUpdateBuffer first copy the data
|
|
into command buffer memory when the command is recorded (which requires
|
|
additional storage and may incur an additional allocation), and then copy
|
|
the data from the command buffer into pname:dstBuffer when the command is
|
|
executed on a device.
|
|
|
|
The additional cost of this functionality compared to <<copies-buffers,
|
|
buffer to buffer copies>> means it is only recommended for very small
|
|
amounts of data, and is why it is limited to only 65536 bytes.
|
|
|
|
Applications can: work around this by issuing multiple
|
|
fname:vkCmdUpdateBuffer commands to different ranges of the same buffer, but
|
|
it is strongly recommended that they should: not.
|
|
====
|
|
|
|
The source data is copied from the user pointer to the command buffer when
|
|
the command is called.
|
|
|
|
fname:vkCmdUpdateBuffer is only allowed outside of a render pass.
|
|
This command is treated as "`transfer`" operation, for the purposes of
|
|
synchronization barriers.
|
|
The ename:VK_BUFFER_USAGE_TRANSFER_DST_BIT must: be specified in pname:usage
|
|
of slink:VkBufferCreateInfo in order for the buffer to be compatible with
|
|
fname:vkCmdUpdateBuffer.
|
|
|
|
.Valid Usage
|
|
****
|
|
* [[VUID-vkCmdUpdateBuffer-dstOffset-00032]]
|
|
pname:dstOffset must: be less than the size of pname:dstBuffer
|
|
* [[VUID-vkCmdUpdateBuffer-dataSize-00033]]
|
|
pname:dataSize must: be less than or equal to the size of
|
|
pname:dstBuffer minus pname:dstOffset
|
|
* [[VUID-vkCmdUpdateBuffer-dstBuffer-00034]]
|
|
pname:dstBuffer must: have been created with
|
|
ename:VK_BUFFER_USAGE_TRANSFER_DST_BIT usage flag
|
|
* [[VUID-vkCmdUpdateBuffer-dstBuffer-00035]]
|
|
If pname:dstBuffer is non-sparse then it must: be bound completely and
|
|
contiguously to a single sname:VkDeviceMemory object
|
|
* [[VUID-vkCmdUpdateBuffer-dstOffset-00036]]
|
|
pname:dstOffset must: be a multiple of `4`
|
|
* [[VUID-vkCmdUpdateBuffer-dataSize-00037]]
|
|
pname:dataSize must: be less than or equal to `65536`
|
|
* [[VUID-vkCmdUpdateBuffer-dataSize-00038]]
|
|
pname:dataSize must: be a multiple of `4`
|
|
ifdef::VK_VERSION_1_1[]
|
|
* [[VUID-vkCmdUpdateBuffer-commandBuffer-01813]]
|
|
If pname:commandBuffer is an unprotected command buffer, then
|
|
pname:dstBuffer must: not be a protected buffer
|
|
* [[VUID-vkCmdUpdateBuffer-commandBuffer-01814]]
|
|
If pname:commandBuffer is a protected command buffer, then
|
|
pname:dstBuffer must: not be an unprotected buffer
|
|
endif::VK_VERSION_1_1[]
|
|
****
|
|
|
|
include::../validity/protos/vkCmdUpdateBuffer.txt[]
|
|
--
|
|
|
|
[NOTE]
|
|
.Note
|
|
====
|
|
The pname:pData parameter was of type code:uint32_t* instead of code:void*
|
|
prior to revision 1.0.19 of the Specification and dlink:VK_HEADER_VERSION 19
|
|
of the <<boilerplate-headers,Vulkan Header Files>>.
|
|
This was a historical anomaly, as the source data may be of other types.
|
|
====
|