C Specification

The VkPhysicalDeviceLimits structure is defined as:

typedef struct VkPhysicalDeviceLimits {
    uint32_t              maxImageDimension1D;
    uint32_t              maxImageDimension2D;
    uint32_t              maxImageDimension3D;
    uint32_t              maxImageDimensionCube;
    uint32_t              maxImageArrayLayers;
    uint32_t              maxTexelBufferElements;
    uint32_t              maxUniformBufferRange;
    uint32_t              maxStorageBufferRange;
    uint32_t              maxPushConstantsSize;
    uint32_t              maxMemoryAllocationCount;
    uint32_t              maxSamplerAllocationCount;
    VkDeviceSize          bufferImageGranularity;
    VkDeviceSize          sparseAddressSpaceSize;
    uint32_t              maxBoundDescriptorSets;
    uint32_t              maxPerStageDescriptorSamplers;
    uint32_t              maxPerStageDescriptorUniformBuffers;
    uint32_t              maxPerStageDescriptorStorageBuffers;
    uint32_t              maxPerStageDescriptorSampledImages;
    uint32_t              maxPerStageDescriptorStorageImages;
    uint32_t              maxPerStageDescriptorInputAttachments;
    uint32_t              maxPerStageResources;
    uint32_t              maxDescriptorSetSamplers;
    uint32_t              maxDescriptorSetUniformBuffers;
    uint32_t              maxDescriptorSetUniformBuffersDynamic;
    uint32_t              maxDescriptorSetStorageBuffers;
    uint32_t              maxDescriptorSetStorageBuffersDynamic;
    uint32_t              maxDescriptorSetSampledImages;
    uint32_t              maxDescriptorSetStorageImages;
    uint32_t              maxDescriptorSetInputAttachments;
    uint32_t              maxVertexInputAttributes;
    uint32_t              maxVertexInputBindings;
    uint32_t              maxVertexInputAttributeOffset;
    uint32_t              maxVertexInputBindingStride;
    uint32_t              maxVertexOutputComponents;
    uint32_t              maxTessellationGenerationLevel;
    uint32_t              maxTessellationPatchSize;
    uint32_t              maxTessellationControlPerVertexInputComponents;
    uint32_t              maxTessellationControlPerVertexOutputComponents;
    uint32_t              maxTessellationControlPerPatchOutputComponents;
    uint32_t              maxTessellationControlTotalOutputComponents;
    uint32_t              maxTessellationEvaluationInputComponents;
    uint32_t              maxTessellationEvaluationOutputComponents;
    uint32_t              maxGeometryShaderInvocations;
    uint32_t              maxGeometryInputComponents;
    uint32_t              maxGeometryOutputComponents;
    uint32_t              maxGeometryOutputVertices;
    uint32_t              maxGeometryTotalOutputComponents;
    uint32_t              maxFragmentInputComponents;
    uint32_t              maxFragmentOutputAttachments;
    uint32_t              maxFragmentDualSrcAttachments;
    uint32_t              maxFragmentCombinedOutputResources;
    uint32_t              maxComputeSharedMemorySize;
    uint32_t              maxComputeWorkGroupCount[3];
    uint32_t              maxComputeWorkGroupInvocations;
    uint32_t              maxComputeWorkGroupSize[3];
    uint32_t              subPixelPrecisionBits;
    uint32_t              subTexelPrecisionBits;
    uint32_t              mipmapPrecisionBits;
    uint32_t              maxDrawIndexedIndexValue;
    uint32_t              maxDrawIndirectCount;
    float                 maxSamplerLodBias;
    float                 maxSamplerAnisotropy;
    uint32_t              maxViewports;
    uint32_t              maxViewportDimensions[2];
    float                 viewportBoundsRange[2];
    uint32_t              viewportSubPixelBits;
    size_t                minMemoryMapAlignment;
    VkDeviceSize          minTexelBufferOffsetAlignment;
    VkDeviceSize          minUniformBufferOffsetAlignment;
    VkDeviceSize          minStorageBufferOffsetAlignment;
    int32_t               minTexelOffset;
    uint32_t              maxTexelOffset;
    int32_t               minTexelGatherOffset;
    uint32_t              maxTexelGatherOffset;
    float                 minInterpolationOffset;
    float                 maxInterpolationOffset;
    uint32_t              subPixelInterpolationOffsetBits;
    uint32_t              maxFramebufferWidth;
    uint32_t              maxFramebufferHeight;
    uint32_t              maxFramebufferLayers;
    VkSampleCountFlags    framebufferColorSampleCounts;
    VkSampleCountFlags    framebufferDepthSampleCounts;
    VkSampleCountFlags    framebufferStencilSampleCounts;
    VkSampleCountFlags    framebufferNoAttachmentsSampleCounts;
    uint32_t              maxColorAttachments;
    VkSampleCountFlags    sampledImageColorSampleCounts;
    VkSampleCountFlags    sampledImageIntegerSampleCounts;
    VkSampleCountFlags    sampledImageDepthSampleCounts;
    VkSampleCountFlags    sampledImageStencilSampleCounts;
    VkSampleCountFlags    storageImageSampleCounts;
    uint32_t              maxSampleMaskWords;
    VkBool32              timestampComputeAndGraphics;
    float                 timestampPeriod;
    uint32_t              maxClipDistances;
    uint32_t              maxCullDistances;
    uint32_t              maxCombinedClipAndCullDistances;
    uint32_t              discreteQueuePriorities;
    float                 pointSizeRange[2];
    float                 lineWidthRange[2];
    float                 pointSizeGranularity;
    float                 lineWidthGranularity;
    VkBool32              strictLines;
    VkBool32              standardSampleLocations;
    VkDeviceSize          optimalBufferCopyOffsetAlignment;
    VkDeviceSize          optimalBufferCopyRowPitchAlignment;
    VkDeviceSize          nonCoherentAtomSize;
} VkPhysicalDeviceLimits;

Members

  • maxImageDimension1D is the maximum dimension (width) supported for all images created with an imageType of VK_IMAGE_TYPE_1D.

  • maxImageDimension2D is the maximum dimension (width or height) supported for all images created with an imageType of VK_IMAGE_TYPE_2D and without VK_IMAGE_CREATE_CUBE_COMPATIBLE_BIT set in flags.

  • maxImageDimension3D is the maximum dimension (width, height, or depth) supported for all images created with an imageType of VK_IMAGE_TYPE_3D.

  • maxImageDimensionCube is the maximum dimension (width or height) supported for all images created with an imageType of VK_IMAGE_TYPE_2D and with VK_IMAGE_CREATE_CUBE_COMPATIBLE_BIT set in flags.

  • maxImageArrayLayers is the maximum number of layers (arrayLayers) for an image.

  • maxTexelBufferElements is the maximum number of addressable texels for a buffer view created on a buffer which was created with the VK_BUFFER_USAGE_UNIFORM_TEXEL_BUFFER_BIT or VK_BUFFER_USAGE_STORAGE_TEXEL_BUFFER_BIT set in the usage member of the VkBufferCreateInfo structure.

  • maxUniformBufferRange is the maximum value that can be specified in the range member of any VkDescriptorBufferInfo structures passed to a call to vkUpdateDescriptorSets for descriptors of type VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER or VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER_DYNAMIC.

  • maxStorageBufferRange is the maximum value that can be specified in the range member of any VkDescriptorBufferInfo structures passed to a call to vkUpdateDescriptorSets for descriptors of type VK_DESCRIPTOR_TYPE_STORAGE_BUFFER or VK_DESCRIPTOR_TYPE_STORAGE_BUFFER_DYNAMIC.

  • maxPushConstantsSize is the maximum size, in bytes, of the pool of push constant memory. For each of the push constant ranges indicated by the pPushConstantRanges member of the VkPipelineLayoutCreateInfo structure, (offset + size) must be less than or equal to this limit.

  • maxMemoryAllocationCount is the maximum number of device memory allocations, as created by vkAllocateMemory, which can simultaneously exist.

  • maxSamplerAllocationCount is the maximum number of sampler objects, as created by vkCreateSampler, which can simultaneously exist on a device.

  • bufferImageGranularity is the granularity, in bytes, at which buffer or linear image resources, and optimal image resources can be bound to adjacent offsets in the same VkDeviceMemory object without aliasing. See Buffer-Image Granularity for more details.

  • sparseAddressSpaceSize is the total amount of address space available, in bytes, for sparse memory resources. This is an upper bound on the sum of the size of all sparse resources, regardless of whether any memory is bound to them.

  • maxBoundDescriptorSets is the maximum number of descriptor sets that can be simultaneously used by a pipeline. All DescriptorSet decorations in shader modules must have a value less than maxBoundDescriptorSets. See ../../html/vkspec.html#descriptorsets-sets.

  • maxPerStageDescriptorSamplers is the maximum number of samplers that can be accessible to a single shader stage in a pipeline layout. Descriptors with a type of VK_DESCRIPTOR_TYPE_SAMPLER or VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER count against this limit. A descriptor is accessible to a shader stage when the stageFlags member of the VkDescriptorSetLayoutBinding structure has the bit for that shader stage set. See ../../html/vkspec.html#descriptorsets-sampler and ../../html/vkspec.html#descriptorsets-combinedimagesampler.

  • maxPerStageDescriptorUniformBuffers is the maximum number of uniform buffers that can be accessible to a single shader stage in a pipeline layout. Descriptors with a type of VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER or VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER_DYNAMIC count against this limit. A descriptor is accessible to a shader stage when the stageFlags member of the VkDescriptorSetLayoutBinding structure has the bit for that shader stage set. See ../../html/vkspec.html#descriptorsets-uniformbuffer and ../../html/vkspec.html#descriptorsets-uniformbufferdynamic.

  • maxPerStageDescriptorStorageBuffers is the maximum number of storage buffers that can be accessible to a single shader stage in a pipeline layout. Descriptors with a type of VK_DESCRIPTOR_TYPE_STORAGE_BUFFER or VK_DESCRIPTOR_TYPE_STORAGE_BUFFER_DYNAMIC count against this limit. A descriptor is accessible to a pipeline shader stage when the stageFlags member of the VkDescriptorSetLayoutBinding structure has the bit for that shader stage set. See ../../html/vkspec.html#descriptorsets-storagebuffer and ../../html/vkspec.html#descriptorsets-storagebufferdynamic.

  • maxPerStageDescriptorSampledImages is the maximum number of sampled images that can be accessible to a single shader stage in a pipeline layout. Descriptors with a type of VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, VK_DESCRIPTOR_TYPE_SAMPLED_IMAGE, or VK_DESCRIPTOR_TYPE_UNIFORM_TEXEL_BUFFER count against this limit. A descriptor is accessible to a pipeline shader stage when the stageFlags member of the VkDescriptorSetLayoutBinding structure has the bit for that shader stage set. See ../../html/vkspec.html#descriptorsets-combinedimagesampler, ../../html/vkspec.html#descriptorsets-sampledimage, and ../../html/vkspec.html#descriptorsets-uniformtexelbuffer.

  • maxPerStageDescriptorStorageImages is the maximum number of storage images that can be accessible to a single shader stage in a pipeline layout. Descriptors with a type of VK_DESCRIPTOR_TYPE_STORAGE_IMAGE, or VK_DESCRIPTOR_TYPE_STORAGE_TEXEL_BUFFER count against this limit. A descriptor is accessible to a pipeline shader stage when the stageFlags member of the VkDescriptorSetLayoutBinding structure has the bit for that shader stage set. See ../../html/vkspec.html#descriptorsets-storageimage, and ../../html/vkspec.html#descriptorsets-storagetexelbuffer.

  • maxPerStageDescriptorInputAttachments is the maximum number of input attachments that can be accessible to a single shader stage in a pipeline layout. Descriptors with a type of VK_DESCRIPTOR_TYPE_INPUT_ATTACHMENT count against this limit. A descriptor is accessible to a pipeline shader stage when the stageFlags member of the VkDescriptorSetLayoutBinding structure has the bit for that shader stage set. These are only supported for the fragment stage. See ../../html/vkspec.html#descriptorsets-inputattachment.

  • maxPerStageResources is the maximum number of resources that can be accessible to a single shader stage in a pipeline layout. Descriptors with a type of VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, VK_DESCRIPTOR_TYPE_SAMPLED_IMAGE, VK_DESCRIPTOR_TYPE_STORAGE_IMAGE, VK_DESCRIPTOR_TYPE_UNIFORM_TEXEL_BUFFER, VK_DESCRIPTOR_TYPE_STORAGE_TEXEL_BUFFER, VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, VK_DESCRIPTOR_TYPE_STORAGE_BUFFER, VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER_DYNAMIC, VK_DESCRIPTOR_TYPE_STORAGE_BUFFER_DYNAMIC, or VK_DESCRIPTOR_TYPE_INPUT_ATTACHMENT count against this limit. For the fragment shader stage the framebuffer color attachments also count against this limit.

  • maxDescriptorSetSamplers is the maximum number of samplers that can be included in descriptor bindings in a pipeline layout across all pipeline shader stages and descriptor set numbers. Descriptors with a type of VK_DESCRIPTOR_TYPE_SAMPLER or VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER count against this limit. See ../../html/vkspec.html#descriptorsets-sampler and ../../html/vkspec.html#descriptorsets-combinedimagesampler.

  • maxDescriptorSetUniformBuffers is the maximum number of uniform buffers that can be included in descriptor bindings in a pipeline layout across all pipeline shader stages and descriptor set numbers. Descriptors with a type of VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER or VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER_DYNAMIC count against this limit. See ../../html/vkspec.html#descriptorsets-uniformbuffer and ../../html/vkspec.html#descriptorsets-uniformbufferdynamic.

  • maxDescriptorSetUniformBuffersDynamic is the maximum number of dynamic uniform buffers that can be included in descriptor bindings in a pipeline layout across all pipeline shader stages and descriptor set numbers. Descriptors with a type of VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER_DYNAMIC count against this limit. See ../../html/vkspec.html#descriptorsets-uniformbufferdynamic.

  • maxDescriptorSetStorageBuffers is the maximum number of storage buffers that can be included in descriptor bindings in a pipeline layout across all pipeline shader stages and descriptor set numbers. Descriptors with a type of VK_DESCRIPTOR_TYPE_STORAGE_BUFFER or VK_DESCRIPTOR_TYPE_STORAGE_BUFFER_DYNAMIC count against this limit. See ../../html/vkspec.html#descriptorsets-storagebuffer and ../../html/vkspec.html#descriptorsets-storagebufferdynamic.

  • maxDescriptorSetStorageBuffersDynamic is the maximum number of dynamic storage buffers that can be included in descriptor bindings in a pipeline layout across all pipeline shader stages and descriptor set numbers. Descriptors with a type of VK_DESCRIPTOR_TYPE_STORAGE_BUFFER_DYNAMIC count against this limit. See ../../html/vkspec.html#descriptorsets-storagebufferdynamic.

  • maxDescriptorSetSampledImages is the maximum number of sampled images that can be included in descriptor bindings in a pipeline layout across all pipeline shader stages and descriptor set numbers. Descriptors with a type of VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, VK_DESCRIPTOR_TYPE_SAMPLED_IMAGE, or VK_DESCRIPTOR_TYPE_UNIFORM_TEXEL_BUFFER count against this limit. See ../../html/vkspec.html#descriptorsets-combinedimagesampler, ../../html/vkspec.html#descriptorsets-sampledimage, and ../../html/vkspec.html#descriptorsets-uniformtexelbuffer.

  • maxDescriptorSetStorageImages is the maximum number of storage images that can be included in descriptor bindings in a pipeline layout across all pipeline shader stages and descriptor set numbers. Descriptors with a type of VK_DESCRIPTOR_TYPE_STORAGE_IMAGE, or VK_DESCRIPTOR_TYPE_STORAGE_TEXEL_BUFFER count against this limit. See ../../html/vkspec.html#descriptorsets-storageimage, and ../../html/vkspec.html#descriptorsets-storagetexelbuffer.

  • maxDescriptorSetInputAttachments is the maximum number of input attachments that can be included in descriptor bindings in a pipeline layout across all pipeline shader stages and descriptor set numbers. Descriptors with a type of VK_DESCRIPTOR_TYPE_INPUT_ATTACHMENT count against this limit. See ../../html/vkspec.html#descriptorsets-inputattachment.

  • maxVertexInputAttributes is the maximum number of vertex input attributes that can be specified for a graphics pipeline. These are described in the array of VkVertexInputAttributeDescription structures that are provided at graphics pipeline creation time via the pVertexAttributeDescriptions member of the VkPipelineVertexInputStateCreateInfo structure. See ../../html/vkspec.html#fxvertex-attrib and ../../html/vkspec.html#fxvertex-input.

  • maxVertexInputBindings is the maximum number of vertex buffers that can be specified for providing vertex attributes to a graphics pipeline. These are described in the array of VkVertexInputBindingDescription structures that are provided at graphics pipeline creation time via the pVertexBindingDescriptions member of the VkPipelineVertexInputStateCreateInfo structure. The binding member of VkVertexInputBindingDescription must be less than this limit. See ../../html/vkspec.html#fxvertex-input.

  • maxVertexInputAttributeOffset is the maximum vertex input attribute offset that can be added to the vertex input binding stride. The offset member of the VkVertexInputAttributeDescription structure must be less than or equal to this limit. See ../../html/vkspec.html#fxvertex-input.

  • maxVertexInputBindingStride is the maximum vertex input binding stride that can be specified in a vertex input binding. The stride member of the VkVertexInputBindingDescription structure must be less than or equal to this limit. See ../../html/vkspec.html#fxvertex-input.

  • maxVertexOutputComponents is the maximum number of components of output variables which can be output by a vertex shader. See ../../html/vkspec.html#shaders-vertex.

  • maxTessellationGenerationLevel is the maximum tessellation generation level supported by the fixed-function tessellation primitive generator. See ../../html/vkspec.html#tessellation.

  • maxTessellationPatchSize is the maximum patch size, in vertices, of patches that can be processed by the tessellation control shader and tessellation primitive generator. The patchControlPoints member of the VkPipelineTessellationStateCreateInfo structure specified at pipeline creation time and the value provided in the OutputVertices execution mode of shader modules must be less than or equal to this limit. See ../../html/vkspec.html#tessellation.

  • maxTessellationControlPerVertexInputComponents is the maximum number of components of input variables which can be provided as per-vertex inputs to the tessellation control shader stage.

  • maxTessellationControlPerVertexOutputComponents is the maximum number of components of per-vertex output variables which can be output from the tessellation control shader stage.

  • maxTessellationControlPerPatchOutputComponents is the maximum number of components of per-patch output variables which can be output from the tessellation control shader stage.

  • maxTessellationControlTotalOutputComponents is the maximum total number of components of per-vertex and per-patch output variables which can be output from the tessellation control shader stage.

  • maxTessellationEvaluationInputComponents is the maximum number of components of input variables which can be provided as per-vertex inputs to the tessellation evaluation shader stage.

  • maxTessellationEvaluationOutputComponents is the maximum number of components of per-vertex output variables which can be output from the tessellation evaluation shader stage.

  • maxGeometryShaderInvocations is the maximum invocation count supported for instanced geometry shaders. The value provided in the Invocations execution mode of shader modules must be less than or equal to this limit. See ../../html/vkspec.html#geometry.

  • maxGeometryInputComponents is the maximum number of components of input variables which can be provided as inputs to the geometry shader stage.

  • maxGeometryOutputComponents is the maximum number of components of output variables which can be output from the geometry shader stage.

  • maxGeometryOutputVertices is the maximum number of vertices which can be emitted by any geometry shader.

  • maxGeometryTotalOutputComponents is the maximum total number of components of output, across all emitted vertices, which can be output from the geometry shader stage.

  • maxFragmentInputComponents is the maximum number of components of input variables which can be provided as inputs to the fragment shader stage.

  • maxFragmentOutputAttachments is the maximum number of output attachments which can be written to by the fragment shader stage.

  • maxFragmentDualSrcAttachments is the maximum number of output attachments which can be written to by the fragment shader stage when blending is enabled and one of the dual source blend modes is in use. See ../../html/vkspec.html#framebuffer-dsb and dualSrcBlend.

  • maxFragmentCombinedOutputResources is the total number of storage buffers, storage images, and output buffers which can be used in the fragment shader stage.

  • maxComputeSharedMemorySize is the maximum total storage size, in bytes, of all variables declared with the WorkgroupLocal storage class in shader modules (or with the shared storage qualifier in GLSL) in the compute shader stage.

  • maxComputeWorkGroupCount[3] is the maximum number of local workgroups that can be dispatched by a single dispatch command. These three values represent the maximum number of local workgroups for the X, Y, and Z dimensions, respectively. The workgroup count parameters to the dispatch commands must be less than or equal to the corresponding limit. See ../../html/vkspec.html#dispatch.

  • maxComputeWorkGroupInvocations is the maximum total number of compute shader invocations in a single local workgroup. The product of the X, Y, and Z sizes as specified by the LocalSize execution mode in shader modules and by the object decorated by the WorkgroupSize decoration must be less than or equal to this limit.

  • maxComputeWorkGroupSize[3] is the maximum size of a local compute workgroup, per dimension. These three values represent the maximum local workgroup size in the X, Y, and Z dimensions, respectively. The x, y, and z sizes specified by the LocalSize execution mode and by the object decorated by the WorkgroupSize decoration in shader modules must be less than or equal to the corresponding limit.

  • subPixelPrecisionBits is the number of bits of subpixel precision in framebuffer coordinates xf and yf. See ../../html/vkspec.html#primsrast.

  • subTexelPrecisionBits is the number of bits of precision in the division along an axis of an image used for minification and magnification filters. 2subTexelPrecisionBits is the actual number of divisions along each axis of the image represented. The filtering hardware will snap to these locations when computing the filtered results.

  • mipmapPrecisionBits is the number of bits of division that the LOD calculation for mipmap fetching get snapped to when determining the contribution from each mip level to the mip filtered results. 2mipmapPrecisionBits is the actual number of divisions.

    Note

    For example, if this value is 2 bits then when linearly filtering between two levels, each level could: contribute: 0%, 33%, 66%, or 100% (this is just an example and the amount of contribution should be covered by different equations in the spec).

  • maxDrawIndexedIndexValue is the maximum index value that can be used for indexed draw calls when using 32-bit indices. This excludes the primitive restart index value of 0xFFFFFFFF. See fullDrawIndexUint32.

  • maxDrawIndirectCount is the maximum draw count that is supported for indirect draw calls. See multiDrawIndirect.

  • maxSamplerLodBias is the maximum absolute sampler LOD bias. The sum of the mipLodBias member of the VkSamplerCreateInfo structure and the Bias operand of image sampling operations in shader modules (or 0 if no Bias operand is provided to an image sampling operation) are clamped to the range [-maxSamplerLodBias,+maxSamplerLodBias]. See ../../html/vkspec.html#samplers-mipLodBias.

  • maxSamplerAnisotropy is the maximum degree of sampler anisotropy. The maximum degree of anisotropic filtering used for an image sampling operation is the minimum of the maxAnisotropy member of the VkSamplerCreateInfo structure and this limit. See ../../html/vkspec.html#samplers-maxAnisotropy.

  • maxViewports is the maximum number of active viewports. The viewportCount member of the VkPipelineViewportStateCreateInfo structure that is provided at pipeline creation must be less than or equal to this limit.

  • maxViewportDimensions[2] are the maximum viewport dimensions in the X (width) and Y (height) dimensions, respectively. The maximum viewport dimensions must be greater than or equal to the largest image which can be created and used as a framebuffer attachment. See Controlling the Viewport.

  • viewportBoundsRange[2] is the [minimum, maximum] range that the corners of a viewport must be contained in. This range must be at least [-2 × size, 2 × size - 1], where size = max(maxViewportDimensions[0], maxViewportDimensions[1]). See Controlling the Viewport.

    Note

    The intent of the viewportBoundsRange limit is to allow a maximum sized viewport to be arbitrarily shifted relative to the output target as long as at least some portion intersects. This would give a bounds limit of [-size + 1, 2 × size - 1] which would allow all possible non-empty-set intersections of the output target and the viewport. Since these numbers are typically powers of two, picking the signed number range using the smallest possible number of bits ends up with the specified range.

  • viewportSubPixelBits is the number of bits of subpixel precision for viewport bounds. The subpixel precision that floating-point viewport bounds are interpreted at is given by this limit.

  • minMemoryMapAlignment is the minimum required alignment, in bytes, of host visible memory allocations within the host address space. When mapping a memory allocation with vkMapMemory, subtracting offset bytes from the returned pointer will always produce an integer multiple of this limit. See ../../html/vkspec.html#memory-device-hostaccess.

  • minTexelBufferOffsetAlignment is the minimum required alignment, in bytes, for the offset member of the VkBufferViewCreateInfo structure for texel buffers. When a buffer view is created for a buffer which was created with VK_BUFFER_USAGE_UNIFORM_TEXEL_BUFFER_BIT or VK_BUFFER_USAGE_STORAGE_TEXEL_BUFFER_BIT set in the usage member of the VkBufferCreateInfo structure, the offset must be an integer multiple of this limit.

  • minUniformBufferOffsetAlignment is the minimum required alignment, in bytes, for the offset member of the VkDescriptorBufferInfo structure for uniform buffers. When a descriptor of type VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER or VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER_DYNAMIC is updated, the offset must be an integer multiple of this limit. Similarly, dynamic offsets for uniform buffers must be multiples of this limit.

  • minStorageBufferOffsetAlignment is the minimum required alignment, in bytes, for the offset member of the VkDescriptorBufferInfo structure for storage buffers. When a descriptor of type VK_DESCRIPTOR_TYPE_STORAGE_BUFFER or VK_DESCRIPTOR_TYPE_STORAGE_BUFFER_DYNAMIC is updated, the offset must be an integer multiple of this limit. Similarly, dynamic offsets for storage buffers must be multiples of this limit.

  • minTexelOffset is the minimum offset value for the ConstOffset image operand of any of the OpImageSample* or OpImageFetch* image instructions.

  • maxTexelOffset is the maximum offset value for the ConstOffset image operand of any of the OpImageSample* or OpImageFetch* image instructions.

  • minTexelGatherOffset is the minimum offset value for the Offset or ConstOffsets image operands of any of the OpImage*Gather image instructions.

  • maxTexelGatherOffset is the maximum offset value for the Offset or ConstOffsets image operands of any of the OpImage*Gather image instructions.

  • minInterpolationOffset is the minimum negative offset value for the offset operand of the InterpolateAtOffset extended instruction.

  • maxInterpolationOffset is the maximum positive offset value for the offset operand of the InterpolateAtOffset extended instruction.

  • subPixelInterpolationOffsetBits is the number of subpixel fractional bits that the x and y offsets to the InterpolateAtOffset extended instruction may be rounded to as fixed-point values.

  • maxFramebufferWidth is the maximum width for a framebuffer. The width member of the VkFramebufferCreateInfo structure must be less than or equal to this limit.

  • maxFramebufferHeight is the maximum height for a framebuffer. The height member of the VkFramebufferCreateInfo structure must be less than or equal to this limit.

  • maxFramebufferLayers is the maximum layer count for a layered framebuffer. The layers member of the VkFramebufferCreateInfo structure must be less than or equal to this limit.

  • framebufferColorSampleCounts is a bitmask1 of VkSampleCountFlagBits indicating the color sample counts that are supported for all framebuffer color attachments with floating- or fixed-point formats. There is no limit that indicates the color sample counts that are supported for all color attachments with integer formats.

  • framebufferDepthSampleCounts is a bitmask1 of VkSampleCountFlagBits indicating the supported depth sample counts for all framebuffer depth/stencil attachments, when the format includes a depth component.

  • framebufferStencilSampleCounts is a bitmask1 of VkSampleCountFlagBits indicating the supported stencil sample counts for all framebuffer depth/stencil attachments, when the format includes a stencil component.

  • framebufferNoAttachmentsSampleCounts is a bitmask1 of VkSampleCountFlagBits indicating the supported sample counts for a framebuffer with no attachments.

  • maxColorAttachments is the maximum number of color attachments that can be used by a subpass in a render pass. The colorAttachmentCount member of the VkSubpassDescription structure must be less than or equal to this limit.

  • sampledImageColorSampleCounts is a bitmask1 of VkSampleCountFlagBits indicating the sample counts supported for all 2D images created with VK_IMAGE_TILING_OPTIMAL, usage containing VK_IMAGE_USAGE_SAMPLED_BIT, and a non-integer color format.

  • sampledImageIntegerSampleCounts is a bitmask1 of VkSampleCountFlagBits indicating the sample counts supported for all 2D images created with VK_IMAGE_TILING_OPTIMAL, usage containing VK_IMAGE_USAGE_SAMPLED_BIT, and an integer color format.

  • sampledImageDepthSampleCounts is a bitmask1 of VkSampleCountFlagBits indicating the sample counts supported for all 2D images created with VK_IMAGE_TILING_OPTIMAL, usage containing VK_IMAGE_USAGE_SAMPLED_BIT, and a depth format.

  • sampledImageStencilSampleCounts is a bitmask1 of VkSampleCountFlagBits indicating the sample supported for all 2D images created with VK_IMAGE_TILING_OPTIMAL, usage containing VK_IMAGE_USAGE_SAMPLED_BIT, and a stencil format.

  • storageImageSampleCounts is a bitmask1 of VkSampleCountFlagBits indicating the sample counts supported for all 2D images created with VK_IMAGE_TILING_OPTIMAL, and usage containing VK_IMAGE_USAGE_STORAGE_BIT.

  • maxSampleMaskWords is the maximum number of array elements of a variable decorated with the SampleMask built-in decoration.

  • timestampComputeAndGraphics indicates support for timestamps on all graphics and compute queues. If this limit is set to VK_TRUE, all queues that advertise the VK_QUEUE_GRAPHICS_BIT or VK_QUEUE_COMPUTE_BIT in the VkQueueFamilyProperties::queueFlags support VkQueueFamilyProperties::timestampValidBits of at least 36. See Timestamp Queries.

  • timestampPeriod is the number of nanoseconds required for a timestamp query to be incremented by 1. See Timestamp Queries.

  • maxClipDistances is the maximum number of clip distances that can be used in a single shader stage. The size of any array declared with the ClipDistance built-in decoration in a shader module must be less than or equal to this limit.

  • maxCullDistances is the maximum number of cull distances that can be used in a single shader stage. The size of any array declared with the CullDistance built-in decoration in a shader module must be less than or equal to this limit.

  • maxCombinedClipAndCullDistances is the maximum combined number of clip and cull distances that can be used in a single shader stage. The sum of the sizes of any pair of arrays declared with the ClipDistance and CullDistance built-in decoration used by a single shader stage in a shader module must be less than or equal to this limit.

  • discreteQueuePriorities is the number of discrete priorities that can be assigned to a queue based on the value of each member of VkDeviceQueueCreateInfo::pQueuePriorities. This must be at least 2, and levels must be spread evenly over the range, with at least one level at 1.0, and another at 0.0. See ../../html/vkspec.html#devsandqueues-priority.

  • pointSizeRange[2] is the range [minimum,maximum] of supported sizes for points. Values written to variables decorated with the PointSize built-in decoration are clamped to this range.

  • lineWidthRange[2] is the range [minimum,maximum] of supported widths for lines. Values specified by the lineWidth member of the VkPipelineRasterizationStateCreateInfo or the lineWidth parameter to vkCmdSetLineWidth are clamped to this range.

  • pointSizeGranularity is the granularity of supported point sizes. Not all point sizes in the range defined by pointSizeRange are supported. This limit specifies the granularity (or increment) between successive supported point sizes.

  • lineWidthGranularity is the granularity of supported line widths. Not all line widths in the range defined by lineWidthRange are supported. This limit specifies the granularity (or increment) between successive supported line widths.

  • strictLines indicates whether lines are rasterized according to the preferred method of rasterization. If set to VK_FALSE, lines may be rasterized under a relaxed set of rules. If set to VK_TRUE, lines are rasterized as per the strict definition. See Basic Line Segment Rasterization.

  • standardSampleLocations indicates whether rasterization uses the standard sample locations as documented in Multisampling. If set to VK_TRUE, the implementation uses the documented sample locations. If set to VK_FALSE, the implementation may use different sample locations.

  • optimalBufferCopyOffsetAlignment is the optimal buffer offset alignment in bytes for vkCmdCopyBufferToImage and vkCmdCopyImageToBuffer. The per texel alignment requirements are enforced, but applications should use the optimal alignment for optimal performance and power use.

  • optimalBufferCopyRowPitchAlignment is the optimal buffer row pitch alignment in bytes for vkCmdCopyBufferToImage and vkCmdCopyImageToBuffer. Row pitch is the number of bytes between texels with the same X coordinate in adjacent rows (Y coordinates differ by one). The per texel alignment requirements are enforced, but applications should use the optimal alignment for optimal performance and power use.

  • nonCoherentAtomSize is the size and alignment in bytes that bounds concurrent access to host-mapped device memory.

Description

1

For all bitmasks of VkSampleCountFlagBits, the sample count limits defined above represent the minimum supported sample counts for each image type. Individual images may support additional sample counts, which are queried using vkGetPhysicalDeviceImageFormatProperties as described in Supported Sample Counts.

See Also

Document Notes

For more information, see the Vulkan Specification at URL

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

Copyright (c) 2014-2017 Khronos Group. This work is licensed under a Creative Commons Attribution 4.0 International License.